DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
485APOS, 1994-11-28
Previous: BEDFORD PROPERTY INVESTORS INC/MD, 10-Q/A, 1994-11-28
Next: HIGH INCOME PORTFOLIO, NSAR-A, 1994-11-28



                                                            File No. 33-50379
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                   FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933                [ X ]

     Pre-Effective Amendment No.                                       [   ]
   

     Post-Effective Amendment No. 2                                    [ X ]
    

                                    and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940        [ X ]
   

     Amendment No. 2                                                   [ X ]
    


                       (Check appropriate box or boxes.)

                Dreyfus Institutional Short Term Treasury Fund
              (Exact Name of Registrant as Specified in Charter)


           c/o The Dreyfus Corporation
           200 Park Avenue, New York, New York          10166
           (Address of Principal Executive Offices)     (Zip Code)


     Registrant's Telephone Number, including Area Code: (212) 922-6000

                          Daniel C. Maclean III, Esq.
                                200 Park Avenue
                           New York, New York 10166
                    (Name and Address of Agent for Service)


It is proposed that this filing will become effective (check appropriate
box)

           immediately upon filing pursuant to paragraph (b)
     ----
   

           on     (date)      pursuant to paragraph (b)
     ----
    
   
      X    60 days after filing pursuant to paragraph (a)(i)
     ----
    

           on     (date)      pursuant to paragraph (a)(i)
     ----
           75 days after filing pursuant to paragraph (a)(ii)
     ----
           on     (date)      pursuant to paragraph (a)(ii) of Rule 485
     ----

If appropriate, check the following box:

           this post-effective amendment designates a new effective date for
           a previously filed post-effective amendment.
     ----
   

     Registrant has registered an indefinite number of shares of its
beneficial interest under the Securities Act of 1933 pursuant to
Section 24(f) of the Investment Company Act of 1940.  Registrant's Rule
24f-2 Notice for the fiscal year ended September 30, 1994 was filed on or about
November 28, 1994.
    

                 Dreyfus Institutional Short Term Treasury Fund
                 Cross-Reference Sheet Pursuant to Rule 495(a)


Items in
Part A of
Form N-1A      Caption                                       Page
_________      _______                                       ____
   

   1           Cover Page                                     Cover

   2           Synopsis                                         2

   3           Condensed Financial Information                  3

   4           General Description of Registrant                3

   5           Management of the Fund                           5

   5(a)        Management's Discussion of Fund's Performance    *

   6           Capital Stock and Other Securities              12

   7           Purchase of Securities Being Offered             6

   8           Redemption or Repurchase                         8

   9           Pending Legal Proceedings                        *

    

Items in
Part B of
Form N-1A
- ---------
   

   10          Cover Page                                     Cover

   11          Table of Contents                              Cover

   12          General Information and History                B-16

   13          Investment Objectives and Policies             B-2

   14          Management of the Fund                         B-4

   15          Control Persons and Principal                  B-7
               Holders of Securities

   16          Investment Advisory and Other                  B-7
               Services
    

_____________________________________

NOTE:  * Omitted since answer is negative or inapplicable.

                Dreyfus Institutional Short Term Treasury Fund
                Cross-Reference Sheet Pursuant to Rule 495(a) (continued)


Items in
Part B of
Form N-1A      Caption                                        Page
_________      _______                                        _____
   

   17          Brokerage Allocation                           B-14

   18          Capital Stock and Other Securities             B-16

   19          Purchase, Redemption and Pricing               B-9, B-16
               of Securities Being Offered

   20          Tax Status                                     *

   21          Underwriters                                   B-13

   22          Calculations of Performance Data               B-15

   23          Financial Statements                           B-17

    

Items in
Part C of
Form N-1A
_________
   

   24          Financial Statements and Exhibits              C-1

   25          Persons Controlled by or Under                 C-4
               Common Control with Registrant

   26          Number of Holders of Securities                C-4

   27          Indemnification                                C-4

   28          Business and Other Connections of              C-5
               Investment Adviser

   29          Principal Underwriters                         C-11

   30          Location of Accounts and Records               C-14

   31          Management Services                            C-14

   32          Undertakings                                   C-14

    

_____________________________________

NOTE:  * Omitted since answer is negative or inapplicable.


- ---------------------------------------------------------------------------
   

PROSPECTUS                                                   JANUARY 28, 1995
    

               DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
- ----------------------------------------------------------------------------
        DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND (THE "FUND") is an
open-end, diversified, management investment company, known as a mutual fund.
ITS GOAL IS TO PROVIDE INVESTORS WITH A HIGH LEVEL OF CURRENT INCOME WITH
MINIMUM FLUCTUATION OF PRINCIPAL VALUE. THE FUND INVESTS ONLY IN U.S.
TREASURY SECURITIES AND REPURCHASE AGREEMENTS IN RESPECT THEREOF. UNDER
NORMAL CIRCUMSTANCES, THE FUND WILL ENTER INTO REPURCHASE AGREEMENTS WITH
MATURITIES NOT EXCEEDING THE NEXT BUSINESS DAY AND WILL INVEST IN SECURITIES
WITH REMAINING MATURITIES OF THREE YEARS OR LESS AND THE DOLLAR-WEIGHTED
AVERAGE MATURITY OF THE FUND'S PORTFOLIO IS NOT EXPECTED TO EXCEED TWO YEARS.
        The Fund is designed for institutional investors, particularly banks,
acting for themselves or in a fiduciary, advisory, agency, custodial or
similar capacity. Fund shares may not be purchased directly by individuals,
although institutions may purchase shares for accounts maintained by
individuals. Such institutions have agreed to transmit copies of this
Prospectus to each individual or entity for whose account the institution
purchases Fund shares, to the extent required by law.
        By this Prospectus, the Fund is offering Class A shares and Class B
shares. Class A shares and Class B shares are identical, except as to the
services offered to and the expenses borne by each class. Class B shares bear
certain costs pursuant to a Service Plan adopted in accordance with Rule
12b-1 under the Investment Act of 1940.
        Investors can invest, reinvest or redeem shares at any time without
charge or penalty imposed by the Fund.
        The Dreyfus Corporation professionally manages the Fund's portfolio.
          This Prospectus sets forth concisely information about the Fund
that an investor should know before investing. It should be read and retained
for future reference.
   

          Part B (also known as the Statement of Additional Information),
dated January 28, 1995, which may be revised from time to time, provides a
further discussion of certain areas in this Prospectus and other matters
which may be of interest to some investors. It has been filed with the
Securities and Exchange Commission and is incorporated herein by reference.
For a free copy, write to the Fund at 144 Glenn Curtiss Boulevard, Uniondale,
New York 11556-0144, or call 1-800-554-4611. When telephoning, ask for
Operator 666.
    
   
          Mutual fund shares are not deposits of or obligations of, or
guaranteed or endorsed by, any bank, and are not federally insured by the
Federal Deposit Insurance Corporation, the Federal Reserve Board, or any
other agency. All mutual fund shares involve certain investment risks,
including the possible loss of principal.
    

- ----------------------------------------------------------------------------

                             TABLE OF CONTENTS
                                                               PAGE
   

   Annual Fund Operating Expenses....................            2
   Condensed Financial Information...................            3
   Description of the Fund...........................            3
   Management of the Fund............................            5
   How to Buy Fund Shares............................            6
   Investor Services.................................            7
   How to Redeem Fund Shares.........................            8
   Service Plan......................................            9
   Shareholder Services Plan.........................            9
   Dividends, Distributions and Taxes................            10
   Performance Information...........................            11
   General Information...............................            12
    

- ----------------------------------------------------------------------------
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES
COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
- ----------------------------------------------------------------------------
                                  Annual Fund Operating Expenses
                         (as a percentage of average daily net assets)
<TABLE>
                                                                                                      CLASS A           CLASS B
                                                                                                   SHARES            SHARES
                                                                                                  --------          ---------
<S>                                                                                                 <C>              <C>
        Management Fees ................................................................            .20%             .20%
        12b-1 Fees (distribution and servicing).........................................             -_              .25%
        Total Fund Operating Expenses...................................................            .20%             .45%
    

      Example:
        An investor would pay the following expenses on
        a $1,000 investment, assuming (1) 5%
        annual return and (2) redemption at the
        end of each time period:

</TABLE>
<TABLE>
   

                                                                                                   CLASS A           CLASS B
                                                                                                   SHARES            SHARES
                                                                                                  ---------          -------
<S>                                             <C>                                                  <C>             <C>
                                                1 YEAR                                               $  2            $  5
                                                3 YEARS                                              $  6            $ 14
                                                5 YEARS                                              $ 11            $ 25
                                                10 YEARS                                             $ 26            $ 57
</TABLE>
    

- ---------------------------------------------------------------------------
          The amounts listed in the example should not be considered as
representative of past or future expenses and actual
expenses may be greater or less than those indicated. Moreover, while the
example assumes a 5% annual return, the Fund's actual performance will vary
and may result in an actual return greater or less than 5%.
- --------------------------------------------------------------------------
   

        The purpose of the foregoing table is to assist investors in
understanding the various costs and expenses borne by the Fund, and therefore
indirectly by investors, the payment of which will reduce investors' return
on an annual basis. Unless The Dreyfus Corporation gives the Fund's investors
at least 90 days' notice to the contrary, The Dreyfus Corporation, and not
the Fund, will be liable for all expenses of the Fund (exclusive of taxes,
brokerage, interest on borrowings and (with the prior written consent of the
necessary state securities commissions) extraordinary expenses) other than
the following expenses, which will be Fund expenses: (i) the management fee
payable by the Fund to The Dreyfus Corporation monthly at the annual rate of
.20 of 1% of the value of the Fund's average daily net assets; and (ii) as to
Class B shares only, payments made pursuant to the Fund's Service Plan at the
annual rate of .25 of 1% of the value of the average daily net assets of
Class B. Institutions effecting transactions in Fund shares for the accounts
of their clients may charge their clients direct fees in connection with such
transactions; such fees are not reflected in the foregoing table. See
"Management of the Fund," "How to Buy Fund Shares," "Service Plan" and
"Shareholder Services Plan."
    

              Page 2
                     CONDENSED FINANCIAL INFORMATION
   

        The information in the following table has been audited by Ernst &
Young LLP, the Fund's independent auditors, whose report thereon appears in
the Statement of Additional Information. Further financial data and related
notes are included in the Statement of Additional Information, available upon
request.
    

                            FINANCIAL HIGHLIGHTS
   

        Contained below is per share operating performance data for a share
of beneficial interest outstanding, total investment return, ratios to
average net assets and other supplemental data for the period from October
29, 1993 (commencement of operations) to September 30, 1994. This information
has been derived from the Fund's financial statements.
    
<TABLE>
   


PER SHARE DATA:                                                                                CLASS A SHARES      CLASS B SHARES
                                                                                               --------------      --------------
<S>                                                                                                <C>              <C>
  Net asset value, beginning of period.................................................            $2.00            $2.00
                                                                                                   ------           ------
  INVESTMENT OPERATIONS:
  Investment income--net...............................................................              .10             .09
  Net realized and unrealized (loss) on investments....................................             (.04)           (.03)
                                                                                                   ------           ------
  TOTAL FROM INVESTMENT OPERATIONS.....................................................              .06             .06
                                                                                                   ------           ------
  DISTRIBUTIONS:
  Dividends from investment income --net...............................................             (.10)           (.09)
                                                                                                   ------           ------
  Net asset value, end of period.......................................................            $1.96            $1.97
                                                                                                   ======           ======
  TOTAL INVESTMENT RETURN (1)..........................................................             3.08%            3.39%
  RATIOS/SUPPLEMENTAL DATA:
  Ratio of expenses to average net assets(1)...........................................              .20%             .45%
  Ratio of net investment income to average net assets(1)..............................              5.41%           5.01%
  Portfolio Turnover Rate (2)..........................................................            41.26%           41.26%
  Net Assets, end of period (000's omitted)............................................          $90,421          $23,147
(1) Annualized.
(2) Not annualized.
</TABLE>
    
   

        Further information about the Fund's performance is contained in the
Fund's annual report, which may be obtained without charge by writing to the
address or calling the number set forth on the cover page of this Prospectus.
    

                           DESCRIPTION OF THE FUND
GENERAL -- When used in this Prospectus and the Statement of Additional
Information, the terms "investor" and "shareholder" refer to the institution
purchasing Fund shares and do not refer to any individual or entity for whose
account the institution may purchase Fund shares. Such institutions have
agreed to transmit copies of this Prospectus and all relevant Fund materials,
including proxy materials, to each individual or entity for whose account the
institution purchases Fund shares, to the extent required by law.
   

        By this Prospectus, two classes of shares of the Fund are being
offered _ Class A shares and Class B shares (each such class being referred
to as a "Class"). The Classes are identical, except that Class B shares are
subject to an annual distribution and service fee at the rate of .25% of the
value of the average daily net assets of the Fund's Class B. The fee is
payable for advertising, marketing and distributing Class B shares and for
ongoing personal services relating to Class B shareholder accounts and
services related to the maintenance of such shareholder accounts pursuant to
a Service Plan adopted in accordance with Rule 12b-1 under the Investment
Company Act of 1940. See "Service Plan." The distribution and service fee
paid by Class B will cause Class B to have a higher expense ratio and to pay
lower dividends than Class A.
    

INVESTMENT OBJECTIVE -- The Fund's goal is to provide investors with a high
level of current income with minimum fluctuation of principal value. The
Fund's investment objective cannot be changed without approval by the holders
of a majority (as defined in the Investment Company Act of 1940) of the
Fund's outstanding voting shares. There can be no assurance that the Fund's
investment objective will be achieved.
MANAGEMENT POLICIES -- The Fund will purchase only U.S. Treasury securities,
and may enter into repurchase agreements in respect thereof. Under normal
circumstances, the Fund will enter into repurchase agree-
                Page 3
ments with maturities not exceeding the next business day and will invest in
securities with remaining maturities of three years or less; the
dollar-weighted average maturity of the Fund's portfolio is not expected to
exceed two years. The Fund also may lend securities from its portfolio and
enter into reverse repurchase agreements as described below.
PORTFOLIO SECURITIES -- U.S. Treasury securities differ in their interest
rates, maturities and times of issuance. Treasury Bills have initial
maturities of one year or less; Treasury Notes have initial maturities of one
to ten years; and Treasury Bonds generally have initial maturities of greater
than ten years.
        Repurchase agreements involve the acquisition by the Fund of an
underlying debt instrument, subject to an obligation of the seller to
repurchase, and the Fund to resell, the instrument at a fixed price usually
not more than one week after its purchase. The Fund, however, intends to
enter into only repurchase agreements with maturities not exceeding the next
business day. Repurchase agreements involve the acquisition by the Fund of an
underlying debt instrument, subject to an obligation of the seller to
repurchase, and the Fund to resell, the instrument at a fixed price usually
not more than one week after its purchase. Certain costs may be incurred by
the Fund in connection with the sale of the securities if the seller does not
repurchase them in accordance with the repurchase agreement. In addition, if
bankruptcy proceedings are commenced with respect to the seller of the
securities, realization on the securities by the Fund may be delayed or
limited.
INVESTMENT TECHNIQUES
LENDING PORTFOLIO SECURITIES -- From time to time, the Fund may lend
securities from its portfolio to brokers, dealers and other financial
institutions needing to borrow securities to complete certain transactions.
Such loans may not exceed 33-1/3% of the value of the Fund's total assets. In
connection with such loans, the Fund will receive collateral consisting of
cash or U.S. Government securities which will be maintained at all times in
an amount equal to at least 100% of the current market value of the loaned
securities. The Fund can increase its income through the investment of such
collateral. The Fund continues to be entitled to payments in amounts equal to
the interest or other distributions payable on the loaned security and
receives interest on the amount of the loan. Such loans will be terminable at
any time upon specified notice. The Fund might experience risk of loss if the
institution with which it has engaged in a portfolio loan transaction
breaches its agreement with the Fund.
LEVERAGE THROUGH BORROWING -- The Fund may borrow for temporary or emergency
purposes and for investment purposes, on a secured basis through entering
into reverse repurchase agreements with banks, brokers or dealers. Reverse
repurchase agreements involve the transfer by the Fund of an underlying debt
instrument in return for cash proceeds based on a percentage of the value of
the security. The Fund retains the right to receive interest and principal
payments on the security. At an agreed upon future date, the Fund repurchases
the security, at principal, plus accrued interest. In certain types of
agreements, there is no agreed upon repurchase date and interest payments are
calculated daily, often based on the prevailing overnight repurchase rate.
The Fund will maintain in a segregated custodial account cash or U.S.
Government securities equal to the aggregate amount of its reverse repurchase
obligations, plus accrued interest, in certain cases, in accordance with
releases promulgated by the Securities and Exchange Commission. The
Securities and Exchange Commission views reverse repurchase agreement
transactions as collateralized borrowings by the Fund, and, pursuant to the
Investment Company Act of 1940, the Fund must maintain continuous asset
coverage (that is, total assets including borrowings, less liabilities
exclusive of borrowings) of 300% of the amount borrowed. If the 300% asset
coverage should decline as a result of market fluctuations or other reasons,
the Fund may be required to sell some of its portfolio holdings within three
days to reduce the debt and restore 300% asset coverage, even though it may
be disadvantageous from an investment standpoint to sell securities at that
time. As a result of these transactions, the Fund is exposed to greater
potential fluctuations in the value of its assets and its net asset value per
share. Interest costs on the money borrowed may exceed the return received on
the securities purchased.
WHEN-ISSUED SECURITIES -- The Fund may purchase U.S. Government securities on
a when-issued basis, which means that the price is fixed at the time of
commitment, but delivery and payment ordinarily take place
             Page 4
a number of days after the date of the commitment to purchase. The Fund will
make commitments to purchase such securities only with the intention of
actually acquiring the securities, but the Fund may sell these securities
before the settlement date if it is deemed advisable. The Fund will not accrue
income in respect of a security purchased on a when-issued basis prior to its
stated delivery date.
        Securities purchased on a when-issued basis and certain other
securities held by the Fund are subject to changes in value (both generally
changing in the same way, i.e., appreciating when interest rates decline and
depreciating when interest rates rise) based upon changes, real or
anticipated, in the level of interest rates. Securities purchased on a
when-issued basis may expose the Fund to risk because they may experience
such fluctuations prior to their actual delivery. Purchasing securities on a
when-issued basis can involve the additional risk that the yield available in
the market when the delivery takes place actually may be higher than that
obtained in the transaction itself. A segregated account of the Fund
consisting of cash or U.S. Government securities at least equal at all times
to the amount of the when-issued commitments will be established and
maintained at the Fund's custodian bank. Purchasing securities on a
when-issued basis when the Fund is fully or almost fully invested may result
in greater potential fluctuation in the value of the Fund's net assets and
its net asset value per share.
CERTAIN FUNDAMENTAL POLICY -- The Fund may borrow money to the extent
permitted under the Investment Company Act of 1940. This is a fundamental
policy of the Fund that cannot be changed without approval by the holders of
a majority (as defined in the Investment Company Act of 1940) of the Fund's
outstanding voting shares. See "Investment Objective and Management Policies
_ Investment Restrictions" in the Fund's Statement of Additional Information.
CERTAIN ADDITIONAL NON-FUNDAMENTAL POLICIES -- The Fund may (i) pledge,
hypothecate, mortgage or otherwise encumber its assets, but only to secure
permitted borrowings; and (ii) invest up to 15% of the value of its net
assets in repurchase agreements providing for settlement in more than seven
days after notice and in other illiquid securities. See "Investment Objective
and Management Policies _ Investment Restrictions" in the Fund's Statement of
Additional Information.
RISK FACTORS -- The Fund is not a money market fund and, although it seeks to
maintain minimum fluctuation of principal value, no assurance can be given
that, when an investor desires to redeem Fund shares, the then-current net
asset value per share will be at or greater than the net asset value per
share at the time of purchase.
        The value of the portfolio securities held by the Fund will vary
inversely to changes in prevailing interest rates. Thus, if interest rates
have increased from the time a security was purchased, such security, if
sold, might be sold at a price less than its cost. Similarly, if interest
rates have declined from the time a security was purchased, such security, if
sold, might be sold at a price greater than its purchase cost. In either
instance, if the security was purchased at face value and held to maturity,
no gain or loss would be realized.
        Dividends and distributions paid by the Fund that are attributable to
interest from direct obligations of the United States currently are not
subject to personal income tax in most states. However, dividends and
distributions attributable to interest from repurchase agreements may be
subject to state tax.
                          MANAGEMENT OF THE FUND
   

        The Dreyfus Corporation, located at 200 Park Avenue, New York, New
York 10166, was formed in 1947 and serves as the Fund's investment adviser.
The Dreyfus Corporation is a wholly-owned subsidiary of Mellon Bank, N.A.,
which is a wholly-owned subsidiary of Mellon Bank Corporation ("Mellon"). As
of October 31, 1994, The Dreyfus Corporation managed or administered
approximately $73 billion in assets for more than 1.9 million investor
accounts nationwide.
    
   
        The Dreyfus Corporation supervises and assists in the overall
management of the Fund's affairs under a Management Agreement with the Fund,
subject to the overall authority of the Fund's Board of Trustees in
accordance with Massachusetts law. The Fund's primary portfolio manager is
Gerald E. Thunelius; he has held that position since June 1994 and has been
an employee of The Dreyfus Corporation since May 1989.
            Page 5
The Fund's other portfolio managers are identified under "Management of the
Fund" in the Fund's Statement of Additional Information. The Dreyfus
Corporation also provides research services for the Fund as well as for other
funds advised by The Dreyfus Corporation through a professional staff of
portfolio managers and securities analysts.
    
   
        Mellon is a publicly owned multibank holding company incorporated
under Pennsylvania law in 1971 and registered under the Federal Bank Holding
Company Act of 1956, as amended. Mellon provides a comprehensive range of
financial products and services in domestic and selected international
markets. Mellon is among the twenty-five largest bank holding companies in
the United States based on total assets. Mellon's principal wholly-owned
subsidiaries are Mellon Bank, N.A., Mellon Bank (DE) National Association,
Mellon Bank (MD), The Boston Company, Inc., AFCOCredit Corporation and a
number of companies known as Mellon Financial Services Corporations. Through
its subsidiaries, Mellon managed more than $130 billion in assets as of July
31, 1994, including approximately $6 billion in mutual fund assets. As of
June 30, 1994, various subsidiaries of Mellon provided non-investment
services, such as custodial or administration services, for approximately
$747 billion in assets including approximately $97 billion in mutual fund
assets.
    
   
        For the period October 29, 1993 (commencement of operations) through
September 30, 1994, the Fund paid The Dreyfus Corporation a management fee at
the annual rate of .20 of 1% of the value of the Fund's average daily net
assets.
    
   
        Unless The Dreyfus Corporation gives the Fund's investors at least 90
days' notice to the contrary, The Dreyfus Corporation, and not the Fund, will
be liable for all expenses of the Fund (exclusive of taxes, brokerage,
interest on borrowings and (with the prior written consent of the necessary
state securities commissions) extraordinary expenses) other than the
following expenses which will be Fund expenses: (i) the management fee
payable by the Fund to The Dreyfus Corporation monthly at the annual rate of
.20 of 1% of the Fund's average daily net assets; and (ii) as to Class B
shares only, payments made pursuant to the Fund's Service Plan at the annual
rate of .25 of 1% of the value of the average daily net assets of Class B.
See "Service Plan." The Fund will not reimburse The Dreyfus Corporation for
any amounts The Dreyfus Corporation may bear.
    
   
        The Dreyfus Corporation may pay the Fund's distributor for
shareholder services from The Dreyfus Corporation's own assets, including
past profits but not including the management fee paid by the Fund. The
Fund's distributor may use part or all of such payments to pay Service Agents
in respect of these services.
    

        The Fund's distributor is Premier Mutual Fund Services, Inc. (the
"Distributor"), located at One Exchange Place, Boston, Massachusetts 02109.
The Distributor is a wholly-owned subsidiary of Institutional Administration
Services, Inc. a provider of mutual fund administration services, the parent
company of which is Boston Institutional Group, Inc.
        The Shareholder Services Group, Inc., a subsidiary of First Data
Corporation, P.O. Box 9671, Providence, Rhode Island 02940-9671, is the
Fund's Transfer and Dividend Disbursing Agent (the "Transfer Agent"). The
Bank of New York, 110 Washington Street, New York, New York 10286, is the
Fund's Custodian.
                              HOW TO BUY FUND SHARES
        The Fund is designed for institutional investors, particularly banks,
acting for themselves or in a fiduciary, advisory, agency, custodial or
similar capacity. Fund shares may not be purchased directly by individuals,
although institutions may purchase shares for accounts maintained by
individuals. Generally, each investor will be required to open a single
master account with the Fund for all purposes. In certain cases, the Fund may
request investors to maintain separate master accounts for shares held by the
investor (i) for its own account, for the account of other institutions and
for accounts for which the institution acts as a fiduciary, and (ii) for
accounts for which the investor acts in some other capacity. An institution
may arrange with the Transfer Agent for sub-accounting services and will be
charged directly for the cost of such services.
   

        The minimum initial investment is $10,000,000, unless: (a) the
investor has invested at least $10,000,000 in the aggregate among the Fund,
Dreyfus Cash Management, Dreyfus Cash Management Plus,
             Page 6
Inc., Dreyfus Government Cash Management, Dreyfus Municipal Cash Management
Plus, Dreyfus New York Municipal Cash Management, Dreyfus Tax Exempt Cash
Management, Dreyfus Treasury Cash Management and Dreyfus Treasury Prime Cash
Management; or (b) the investor has, in the opinion of the Distributor,
adequate intent and availability of funds to reach a future level of
investment of $10,000,000 among the funds identified above. There is no
minimum for subsequent purchases. The initial investment must be accompanied
by the Fund's Account Application. Management understands that some financial
institutions, securities dealers and other industry professionals
(collectively, "Service Agents") and other institutions may charge their
clients fees in connection with purchases for the accounts of their clients.
These fees would be in addition to any amounts which might be received under
the Service Plan. Service Agents may receive different levels of compensation
for selling different classes of shares. Each Service Agent has agreed to
transmit to its clients a schedule of such fees. Share certificates are
issued only upon the investor's written request. No certificates are issued
for fractional shares. The Fund reserves the right to reject any purchase
order.
    
   

        Fund shares may be purchased by wire, by telephone or through
compatible computer facilities. All payments should be made in U.S. dollars
and, to avoid fees and delays, should be drawn only on U.S. banks. For
instructions concerning purchases and to determine whether their computer
facilities are compatible with the Fund's, investors should call one of the
telephone numbers listed under "General Information" in this Prospectus.
    

        Fund shares are sold on a continuous basis at the net asset value per
share next determined after an order in proper form and Federal Funds (monies
of member banks in the Federal Reserve System which are held on deposit at a
Federal Reserve Bank) are received by the Transfer Agent or other agent. If
an investor does not remit Federal Funds, its payment must be converted into
Federal Funds. This usually occurs within one business day of receipt of a
bank wire and within two business days of receipt of a check drawn on a
member bank of the Federal Reserve System. Checks drawn on banks which are
not members of the Federal Reserve System may take considerably longer to
convert into Federal Funds. Prior to receipt of Federal Funds, the investor's
money will not be invested.
        The Fund's net asset value per share is determined as of the close of
trading on the floor of the New York Stock Exchange (currently 4:00 p.m., New
York time), on each day that the New York Stock Exchange is open for
business. Net asset value per share of each Class is computed by dividing the
value of the Fund's net assets represented by such Class (i.e., the value of
its assets less liabilities) by the total number of shares of such Class
outstanding. The Fund's investments are valued each business day generally by
using available market quotations or at fair value which may be determined by
one or more pricing services approved by the Board of Trustees. Each pricing
service's procedures are reviewed under the general supervision of the Board
of Trustees. For further information regarding the methods employed in
valuing the Fund's investments, see "Determination of Net Asset Value" in the
Fund's Statement of Additional Information.
        Federal Regulations require that an investor provide a certified
Taxpayer Identification Number ("TIN") upon opening or reopening an account.
See "Dividends, Distributions and Taxes" and the Fund's Account Application
for further information concerning this requirement. Failure to furnish a
certified TIN to the Fund could subject an investor to a $50 penalty imposed
by the Internal Revenue Service (the "IRS").
                               INVESTOR SERVICES
   

FUND EXCHANGES -- An investor may purchase, in exchange for Class A or Class
B shares of the Fund, shares of Dreyfus Cash Management, Dreyfus Cash
Management Plus, Inc., Dreyfus Government Cash Management, Dreyfus New York
Municipal Cash Management, Dreyfus Municipal Cash Management Plus, Dreyfus
Tax Exempt Cash Management, Dreyfus Treasury Cash Management and Dreyfus
Treasury Prime Cash Management, which have different investment objectives
that may be of interest to investors. Upon an exchange into a new account, the
 following shareholder services and privileges, as applicable and where
available, will be automatically carried over to the fund into which the
exchange is being made: Telephone Exchange
                Page 7
Privilege, Redemption by Wire or Telephone, Redemption Through Compatible
Computer Facilities and the dividend/capital gain distribution option
selected by the investor.
    
   

        To request an exchange, instructions must be given to the Distributor
in writing or by telephone. See "How to Redeem Fund Shares _ Procedures."
Before any exchange, the investor must obtain and should review a copy of the
current prospectus of the fund into which the exchange is being made.
Prospectuses may be obtained by calling 1-800-645-6561. Shares will be
exchanged at the net asset value next determined after receipt of an exchange
request in proper form. The exchange of shares of one fund for shares of
another fund is treated for Federal income tax purposes as a sale of the
shares given in exchange by the investor and, therefore, an exchanging
investor may realize a taxable gain or loss. No fees currently are charged
investors directly in connection with exchanges, although the Fund reserves
the right, upon not less than 60 days' written notice, to charge investors a
nominal fee in accordance with rules promulgated by the Securities and
Exchange Commission. The Fund reserves the right to reject any exchange
request in whole or in part. The availability of Fund exchanges may be
modified or terminated at any time upon notice to investors.
    
   
DREYFUS AUTO-EXCHANGE PRIVILEGE -- Dreyfus Auto-Exchange Privilege enables an
investor to invest regularly (on a semi-monthly, quarterly or annual basis),
in exchange for Class A or Class B shares of the Fund, in shares of Dreyfus
Cash Management, Dreyfus Cash Management Plus, Inc., Dreyfus Government Cash
Management, Dreyfus New York Municipal Cash Management, Dreyfus Municipal
Cash Management Plus, Dreyfus Tax Exempt Cash Management, Dreyfus Treasury
Cash Management or Dreyfus Treasury Prime Cash Management, if the investor is
currently an investor in one of these funds. The amount an investor
designates, which can be expressed either in terms of a specific dollar or
share amount, will be exchanged automatically on the first and/or fifteenth
day of the month according to the schedule that the investor has selected.
Shares will be exchanged at the then-current net asset value. The right to
exercise this Privilege may be modified or cancelled by the Fund or the
Transfer Agent. An investor may cancel the exercise of this Privilege at any
time by writing to The Dreyfus Institutional Services Division, EAB Plaza,
144 Glenn Curtiss Boulevard, 8th Floor, Uniondale, New York 11556-0144. The
Fund may charge a service fee for the use of this Privilege. No such fee
currently is contemplated. The exchange of shares of one fund for shares of
another is treated for Federal income tax purposes as a sale of the shares
given in exchange by the investor and, therefore, an exchanging investor may
realize a taxable gain or loss. For more information concerning this
Privilege and the funds eligible to participate in this Privilege, or to
obtain a Dreyfus Auto-Exchange Authorization Form, please call toll free
1-800-346-3621.
    

                         HOW TO REDEEM FUND SHARES
GENERAL -- Investors may request redemption of shares at any time and the
shares will be redeemed at the next determined net asset value.
   

        The Fund imposes no charges when shares are redeemed directly through
the Distributor. Service Agents or other institutions may charge their
clients a nominal fee for effecting redemptions of Fund shares. Any share
certificates representing Fund shares being redeemed must be submitted with
the redemption request. The value of the shares redeemed may be more or less
than their original cost, depending upon the Fund's then-current net asset
value.
    
   
        If a request for redemption is received in proper form by the
Distributor by 4:00 p.m., New York time, the shares will receive the dividend
on the Fund's shares declared on that day and the proceeds of redemption
ordinarily will be transmitted in Federal Funds on the next business day.
    

        The Fund ordinarily will make payment for all shares redeemed within
seven days after receipt by the Transfer Agent of a redemption request in
proper form, except as provided by the rules of the Securities and Exchange
Commission.
PROCEDURES -- Investors may redeem shares by wire or telephone, or through
compatible computer facilities as described below.
             Page 8
   

        An investor may redeem Fund shares by telephone if he or she has
checked the appropriate box on the Fund's Account Application or has filed a
Shareholder Services Form with the Transfer Agent. If an investor selects a
telephone redemption privilege or telephone exchange privilege (which is
granted automatically unless the investor refuses it), the investor
authorizes the Transfer Agent or its agent to act on telephone instructions from
any person representing himself or herself to be an authorized representative
of the investor, and reasonably believed by the Transfer Agent or its agent to
be genuine. The Fund will require the Transfer Agent and its agents to employ
reasonable procedures, such as requiring a form of personal identification,
to confirm that instructions are genuine and, if they do not follow such
procedures, the Fund or the Transfer Agent may be liable for any losses due
to unauthorized or fraudulent instructions. The Fund or the Transfer Agent
will not be liable for following telephone instructions reasonably believed to
be genuine.
    
   
        During times of drastic economic or market conditions, investors may
experience difficulty in contacting the Transfer Agent or its agents
by telephone to request a redemption or exchange of Fund shares. In such cases,
investors should consider using the other redemption procedures described
herein.
    
   

REDEMPTION BY WIRE OR TELEPHONE -- Investors may redeem Fund shares by wire
or telephone. The redemption proceeds will be paid by wire transfer.
Investors can redeem shares by telephone by calling one of the telephone
numbers listed under "General Information" in this Prospectus. The Fund
reserves the right to refuse any request made by wire or telephone and may
limit the amount involved or the number of telephone redemptions. This
procedure may be modified or terminated at any time by the Transfer Agent or
the Fund. The Fund's Statement of Additional Information sets forth
instructions for redeeming shares by wire. Shares for which certificates have
been issued may not be redeemed by wire or telephone.
    
   
REDEMPTION THROUGH COMPATIBLE COMPUTER FACILITIES -- The Fund makes available
to institutions the ability to redeem shares through compatible computer
facilities. Investors desiring to redeem shares in this manner should call
one of the telephone numbers listed under "General Information" in this
Prospectus to determine whether their computer facilities are compatible and
to receive instructions for redeeming shares in this manner.
    

                                    SERVICE PLAN
   

                                   (CLASS B ONLY)
        Class B shares are subject to a Service Plan adopted pursuant to Rule
12b-1 under the Investment Company Act of 1940. Under the Service Plan, the
Fund (a) reimburses the Distributor for distributing the Fund's Class B
shares and (b) pays The Dreyfus Corporation, Dreyfus Service Corporation, a
wholly-owned subsidiary of The Dreyfus Corporation, and any affiliate of
either of them (collectively, "Dreyfus") for advertising and marketing
relating to the Fund's Class B shares and for providing certain services
relating to Class B shareholder accounts, such as answering shareholder
inquiries regarding the Fund and providing reports and other information, and
services related to the maintenance of such shareholder accounts
("Servicing"), at an aggregate annual fee of .25 of 1% of the value of the
average daily net assets of Class B. Each of the Distributor and Dreyfus may
pay one or more Service Agents a fee in respect of the Fund's Class B shares
owned by shareholders with whom the Service Agent has a Servicing
relationship or for whom the Service Agent is the dealer or holder of record.
Each of the Distributor and Dreyfus determines the amounts, if any, to be
paid to Service Agents under the Service Plan and the basis on which such
payments are made. The fee payable for Servicing is intended to be a "service
fee" as defined in Article III, Section 26 of the NASD Rules of Fair
Practice. The fees payable under the Service Plan are payable without regard
to actual expenses incurred.
    

                             SHAREHOLDER SERVICES PLAN
                                   (CLASS A ONLY)
        Class A shares are subject to a Shareholder Services Plan pursuant to
which the Fund has agreed to reimburse Dreyfus Service Corporation an amount
not to exceed an annual rate of .25 of 1% of the value of the average daily
net assets of Class A for certain allocated expenses of providing personal
services to, and/or main-
                      Page 9
taining accounts of, Class A shareholders. The services provided may include
personal services relating to Class A shareholder accounts, such as answering
shareholder inquiries regarding the Fund and providing reports and other
information, and services related to the maintenance of such shareholder
accounts. Pursuant to an undertaking by The Dreyfus Corporation described
under "Management of the Fund," The Dreyfus Corporation, and not the Fund,
currently reimburses Dreyfus Service Corporation for any such allocated
expenses.
                        DIVIDENDS, DISTRIBUTIONS AND TAXES
        The Fund ordinarily declares dividends from net investment income on
each day the New York Stock Exchange is open for business. The Fund's
earnings for Saturdays, Sundays and holidays are declared as dividends on the
next business day. Dividends usually are paid on the last business day of
each month, and are automatically reinvested in additional Fund shares at net
asset value or, at the investor's option, paid in cash. If an investor
redeems all shares in its account at any time during the month, all dividends
to which the investor is entitled will be paid along with the proceeds of the
redemption. Distributions from net realized short-term capital gains, if any,
are paid quarterly. Distributions from net realized long-term capital gains,
if any, generally are paid once a year, but the Fund may make such
distributions on a more frequent basis to comply with the distribution
requirements of the Code, in all events in a manner consistent with the
provisions of the Investment Company Act of 1940. The Fund will not make
distributions from net realized securities gains unless capital loss
carryovers, if any, have been utilized or have expired. Investors may choose
whether to receive distributions in cash or to reinvest in additional shares
of the Fund at net asset value. All expenses are accrued daily and deducted
before declaration of dividends to investors. Dividends paid by each Class
will be calculated at the same time and in the same manner and will be of the
same amount, except that the expenses attributable solely to Class A or Class
B will be borne exclusively by such Class. Class B shares will receive lower
price per share dividends than Class A shares because of the higher expenses
borne by Class B. See "Annual Fund Operating Expenses."
   

        Dividends derived from net investment income, together with
distributions from any net realized short-term securities gains and all or a
portion of any gains realized from the sale of other disposition of certain
market discount bonds, paid by the Fund generally are taxable to U.S.
investors as ordinary income, whether or not reinvested in additional Fund
shares. No dividend will qualify for the dividends received deduction
allowable to certain U.S. corporations. Distributions from net realized
long-term securities gains, if any, generally are taxable to U.S. investors
as long-term capital gains for Federal income tax purposes, regardless of how
long shareholders have held their shares and whether such distributions are
received in cash or reinvested in additional Fund shares. The Code provides
that the net capital gains of an individual generally will not be subject to
Federal income tax at a rate in excess of 28%. Dividends and distributions
may be subject to state and local taxes.
    
   
        Dividends derived from net investment income and distributions
attributable to interest from direct obligations of the United States and
paid by the Fund to a shareholder currently are not subject to state personal
income tax. Dividends and distributions attributable to interest from the
entry into repurchase agreements may be subject to state tax. The Fund will
provide shareholders with a statement which sets forth the percentage of
dividends and distributions paid by the Fund that is attributable to interest
income from direct obligations of the United States.
    

        Dividends derived from net investment income, together with
distributions from net realized short-term securities gains and all or a
portion of any gains realized from the sale or other disposition of certain
market discounts bonds, paid by the Fund with respect to Fund shares
beneficially owned by a foreign investor generally are subject to U.S.
nonresident withholding taxes at the rate of 30%, unless the foreign investor
claims the benefits of a lower rate specified in a tax treaty. Distributions
from net realized long-term securities gains paid by the Fund with respect to
Fund shares beneficially owned by a foreign investor, as well as the proceeds
of any redemptions from such investor's account, regardless of the extent to
which gain or loss may be real-
                 Page 10
ized, will not be subject to U.S. nonresident withholding tax. However, such
distributions may be subject to backup withholding, as described below,
unless the foreign investor certifies his non-U.S. residency status.
        Notice as to the tax status of dividends and distributions will be
mailed to investors annually. Each investor also will receive periodic
summaries of the investor's account which will include information as to
dividends and distributions from securities gains, if any, paid during the
year.
        Federal regulations generally require the Fund to withhold ("backup
withholding") and remit to the U.S. Treasury 31% of dividends, distributions
from net realized securities gains and the proceeds of any redemption,
regardless of the extent to which gain or loss may be realized, paid to a
shareholder if such shareholder fails to certify either that the TIN
furnished in connection with opening an account is correct or that such
shareholder has not received notice from the IRS of being subject to backup
withholding as a result of a failure to properly report taxable dividend or
interest income on a Federal income tax return. Furthermore, the IRS may
notify the Fund to institute backup withholding if the IRS determines a
shareholder's TIN is incorrect or if a shareholder has failed to properly
report taxable dividend and interest income on a Federal income tax return.
        A TIN is either the Social Security number or employer identification
number of the record owner of the account. Any tax withheld as a result of
backup withholding does not constitute an additional tax imposed on the
record owner of the account, and may be claimed as a credit on the record
owner's Federal income tax return.
   

        Management of the Fund believes that the Fund has qualified for the
fiscal year ended September 30, 1994 as a "regulated investment company"
under the Code. The Fund intends to continue to so qualify if such
qualification is in the best interests of its shareholders. Such
qualification relieves the Fund of any liability for Federal income tax to
the extent its earnings are distributed in accordance with applicable
provisions of the Code. In addition, the Fund is subject to a non-deductible
4% excise tax, measured with respect to certain undistributed amounts of
taxable investment income and capital gains, if any.
    

        Each investor should consult its tax adviser regarding specific
questions as to Federal, state or local taxes.
                             PERFORMANCE INFORMATION
        For purposes of advertising, performance of each Class of shares may
be calculated on several bases, including current yield, average annual total
return and/or total return.
        Current yield refers to the Fund's annualized net investment income
per share over a 30-day period, expressed as a percentage of the net asset
value per share at the end of the period. For purposes of calculating current
yield, the amount of net investment income per share during that 30-day
period, computed in accordance with regulatory requirements, is compounded by
assuming that it is reinvested at a constant rate over a six-month period. An
identical result is then assumed to have occurred during a second six-month
period which, when added to the result for the first six months, provides an
"annualized" yield for an entire one-year period. Calculations of the Fund's
current yield may reflect absorbed expenses pursuant to any undertaking that
may be in effect. See "Management of the Fund."
        Average annual total return is calculated pursuant to a standardized
formula which assumes that an investment in the Fund was purchased with an
initial payment of $1,000 and that the investment was redeemed at the end of
a stated period of time, after giving effect to the reinvestment of dividends
and distributions during the period. The return is expressed as a percentage
rate which, if applied on a compounded annual basis, would result in the
redeemable value of the investment at the end of the period. Advertisements
of the Fund's performance will include the Fund's average annual total return
for one, five and ten year periods, or for shorter time periods depending
upon the length of time the Fund has operated. Computations of average annual
total return for periods of less than one year represent an annualization of
the Fund's actual total return for the applicable period.
        Total return is computed on a per share basis and assumes the
reinvestment of dividends and distributions. Total return generally is
expressed as a percentage rate which is calculated by combining the income
and prin-
                Page 11
cipal changes for a specified period and dividing by the net asset
value per share at the beginning of the period. Advertisements may include
the percentage rate of total return or may include the value of a
hypothetical investment at the end of the period which assumes the
application of the percentage rate of total return.
        Performance will vary from time to time and past results are not
necessarily representative of future results. Investors should remember that
performance is a function of portfolio management in selecting the type and
quality of portfolio securities and is affected by operating expenses.
Performance information, such as that described above, may not provide a
basis for comparison with other investment companies using a different method
of calculating performance.
        Comparative performance information may be used from time to time in
advertising or marketing the Fund's shares, including data from Lipper
Analytical Services, Inc., Morningstar, Inc., Bank Rate Monitortrademark, N.
Palm Beach, Fla. 33408, IBC/Donoghue's Money Fund Report, Bond Buyer's
20-Bond Index, Moody's Bond Survey Bond Index, Salomon Brothers Broad
Investment Grade Index and other industry publications.
                             GENERAL INFORMATION
   

        The Fund was organized as an unincorporated business trust under the
laws of the Commonwealth of Massachusetts pursuant to an Agreement and
Declaration of Trust (the "Trust Agreement") dated March 12, 1992, and
commenced operations on October 29, 1993. The Fund is authorized to issue an
unlimited number of shares of beneficial interest, par value $.001 per share.
The Fund's shares are classified into two classes _ Class A and Class B. Each
share has one vote and shareholders will vote in the aggregate and not by
class except as otherwise required by law or with respect to any matter which
affects only one class. Holders of Class B shares only, however, will be
entitled to vote on matters subjected to shareholders pertaining to the
Service Plan.
    

        Under Massachusetts law, shareholders could, under certain
circumstances, be held liable for the obligations of the Fund. However, the
Trust Agreement disclaims shareholder liability for acts or obligations of
the Fund and requires that notice of such disclaimer be given in each
agreement, obligation or instrument entered into or executed by the Fund or a
Trustee. The Trust Agreement provides for indemnification from the Fund's
property for all losses and expenses of any shareholder held liable for the
obligations of the Fund. Thus, the risk of a shareholder's incurring
financial loss on account of shareholder liability is limited to
circumstances in which the Fund itself would be unable to meet its
obligations, a possibility which management believes is remote. Upon payment
of any liability incurred by the Fund, the shareholder paying such liability
will be entitled to reimbursement from the general assets of the Fund. The
Trustees intend to conduct the operations of the Fund in such a way so as to a
void, as far as possible, ultimate liability of the shareholders for
liabilities of the Fund. As described under "Management of the Fund" in the
Statement of Additional Information, the Fund ordinarily will not hold
shareholder meetings; however, shareholders under certain circumstances may
have the right to call a meeting of shareholders for the purpose of voting to
remove Trustees.
        The Transfer Agent will maintain a record of each investor's
ownership and will send confirmations and statements of account.
        Investor inquiries may be made by writing to the Fund at 144 Glenn
Curtiss Boulevard, Uniondale, New York 11556-0144, or, in the case of
institutional investors, by calling in New York State 1-718-895-1650;
outside New York State call toll free 1-800-346-3621. Individuals or entities
for whom institutions may purchase or redeem Fund shares should call toll
free 1-800-554-4611.
        The Glass-Steagall Act and other applicable laws prohibit Federally
chartered or supervised banks from engaging in certain aspects of the
business of issuing, underwriting, selling and/or distributing securities.
Accordingly, banks will perform only administrative and shareholder servicing
functions. While the matter is not free from doubt, the Fund's Board of
Trustees believes that such laws should not preclude a bank from acting on
behalf of clients as contemplated by this Prospectus. However, judicial or
administrative decisions
         Page 12
or interpretations of such laws, as well as changes
in either Federal or state statutes or regulations relating to the
permissible activities of banks and their subsidiaries or affiliates, could
prevent a bank from continuing to perform all or part of the activities
contemplated by this Prospectus. If a bank were prohibited from so acting,
its shareholder clients would be permitted to remain Fund shareholders and
alternative means for continuing the servicing of such shareholders would be
sought. In such event, changes in the operation of the Fund might occur and
shareholders serviced by such bank might no longer be able to avail
themselves of any automatic investment or other services then being provided
by the bank. The Fund does not expect that shareholders would suffer any
adverse financial consequences as a result of any of these occurrences.
          NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE
ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS AND IN THE
FUND'S OFFICIAL SALES LITERATURE IN CONNECTION WITH THE OFFER OF THE FUND'S
SHARES, AND, IF GIVEN OR MADE, SUCH OTHER INFORMATION OR REPRESENTATIONS MUST
NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE FUND. THIS PROSPECTUS
DOES NOT CONSTITUTE AN OFFER IN ANY STATE IN WHICH, OR TO ANY PERSON TO WHOM,
SUCH OFFERING MAY NOT LAWFULLY BE MADE.
           Page 13
PROSPECTUS
(LION PICTURE)
DREYFUS
INSTITUTIONAL
SHORT TERM
TREASURY
FUND
copyright logo 1995, Dreyfus Service Corporation
721/680P3012895



                DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
                          CLASS A AND CLASS B SHARES
                                    PART B
                     (STATEMENT OF ADDITIONAL INFORMATION)
   

                               JANUARY 28, 1995
    
   


     This Statement of Additional Information, which is not a prospectus,
supplements and should be read in conjunction with the current Prospectus of
Dreyfus Institutional Short Term Treasury Fund (the "Fund"), dated January
28, 1995, as it may be revised from time to time.  To obtain a copy of the
Fund's Prospectus, please write to the Fund at 144 Glenn Curtiss Boulevard,
Uniondale, New York 11556-0144, or, in the case of institutional investors,
call the following numbers:
    

                Call Toll Free 1-800-346-3621
                In New York State -- Call 1-718-895-1650

     Individuals or entities for whom institutions may purchase or redeem
Fund shares may write to the Fund at the above address or call toll free 1-
800-554-4611 to obtain a copy of the Fund's Prospectus.

     The Dreyfus Corporation (the "Manager") serves as the Fund's investment
adviser.
   

     Premier Mutual Fund Services, Inc. (the "Distributor") is the
distributor of the Fund's shares.
    


                               TABLE OF CONTENTS

   

                                                           Page
Investment Objective and Management Policies. . . . . . .   B-2
Management of the Fund. . . . . . . . . . . . . . . . . .   B-4
Management Agreement. . . . . . . . . . . . . . . . . . .   B-7
Purchase of Fund Shares . . . . . . . . . . . . . . . . .   B-9
Service Plan (Class B). . . . . . . . . . . . . . . . . .   B-10
Shareholder Services Plan (Class A) . . . . . . . . . . .   B-11
Redemption of Fund Shares . . . . . . . . . . . . . . . .   B-11
Determination of Net Asset Value. . . . . . . . . . . . .   B-12
Dividends, Distributions and Taxes. . . . . . . . . . . .   B-13
Portfolio Transactions. . . . . . . . . . . . . . . . . .   B-14
Investor Services . . . . . . . . . . . . . . . . . . . .   B-14
Performance Information . . . . . . . . . . . . . . . . .   B-15
Information About the Fund. . . . . . . . . . . . . . . .   B-16
Custodian, Transfer and Dividend Disbursing Agent,
  Counsel and Independent Auditors. . . . . . . . . . . .   B-16
Financial Statements. . . . . . . . . . . . . . . . . . .   B-18
Report of Independent Auditors. . . . . . . . . . . . . .   B-27
    

                 INVESTMENT OBJECTIVE AND MANAGEMENT POLICIES


     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "Description of the
Fund."

Management Policies

     The Fund engages in the following practices in furtherance of its
objective.

     Lending Portfolio Securities.  To a limited extent, the Fund may lend
its portfolio securities to brokers, dealers and other financial
institutions, provided it receives cash collateral which at all times is
maintained in an amount equal to at least 100% of the current market value
of the securities loaned.  By lending its portfolio securities, the Fund can
increase its income through the investment of the cash collateral.  For
purposes of this policy, the Fund considers collateral consisting of U.S.
Government securities to be the equivalent of cash.  From time to time, the
Fund may return to the borrower or a third party which is unaffiliated with
the Fund, and which is acting as a "placing broker," a part of the interest
earned from the investment of collateral received for securities loaned.

     The Securities and Exchange Commission currently requires that the
following conditions must be met whenever portfolio securities are loaned:
(1) the Fund must receive at least 100% cash collateral from the borrower;
(2) the borrower must increase such collateral whenever the market value of
the securities rises above the level of such collateral; (3) the Fund must
be able to terminate the loan at any time; (4) the Fund must receive
reasonable interest on the loan, as well as any interest or other
distributions payable on the loaned securities, and any increase in market
value; and (5) the Fund may pay only reasonable custodian fees in connection
with the loan.  These conditions may be subject to future modification.

     Investment Restrictions.  The Fund has adopted investment restrictions
numbered 1 through 8 as fundamental policies.  These restrictions cannot be
changed without approval by the holders of a majority (as defined in the
Investment Company Act of 1940, as amended (the "Act")) of the Fund's
outstanding voting shares.  Investment restrictions numbered 9 through 12
are not fundamental policies and may be changed by vote of a majority of the
Trustees at any time.  The Fund may not:

     1.  Invest in commodities, except that the Fund may purchase and sell
options, forward contracts, futures contracts, including those relating to
indexes, and options on futures contracts or indexes.

     2.  Purchase, hold or deal in real estate, real estate limited
partnership interests, or oil, gas or other mineral leases or exploration or
development programs, but the Fund may purchase and sell securities that are
secured by real estate and may purchase and sell securities issued by
companies that invest or deal in real estate.

     3.  Borrow money, except to the extent permitted under the Act.  For
purposes of this investment restriction, the entry into options, forward
contracts, futures contracts, including those relating to indexes, and
options on futures contracts or indexes shall not constitute borrowing.

     4.  Make loans to others, except through the purchase of debt
obligations and the entry into repurchase agreements.  However, the Fund may
lend its portfolio securities in an amount not to exceed 33-1/3% of the
value of its total assets.  Any loans of portfolio securities will be made
according to guidelines established by the Securities and Exchange
Commission and the Fund's Board of Trustees.

     5.  Act as an underwriter of securities of other issuers, except to the
extent the Fund may be deemed an underwriter under the Securities Act of
1933, as amended, by virtue of disposing of portfolio securities.

     6.  Invest more than 25% of its assets in the securities of issuers in
any single industry, provided that there shall be no limitation on the
purchase of obligations issued or guaranteed by the U.S. Government, its
agencies or instrumentalities.

     7.  Issue any senior security (as such term is defined in Section 18(f)
of the Act), except to the extent the activities permitted in Investment
Restriction Nos. 1, 3 and 9 may be deemed to give rise to a senior security.

     8.  Purchase securities on margin, but the Fund may make margin
deposits in connection with transactions in options, forward contracts,
futures contracts, including those related to indexes, and options on
futures contracts or indexes.

     9.  Pledge, mortgage or hypothecate its assets, except to the extent
necessary to secure permitted borrowings and to the extent related to the
deposit of assets in escrow in connection with writing covered put and call
options and the purchase of securities on a when-issued or delayed-delivery
basis and collateral and initial or variation margin arrangements with
respect to options, forward contracts, futures contracts, including those
related to indexes, and options on futures contracts or indexes.

     10.  Purchase, sell or write puts, calls or combinations thereof.

     11.  Enter into repurchase agreements providing for settlement in more
than seven days after notice or purchase securities which are illiquid, if,
in the aggregate, more than 15% of the value of the Fund's net assets would
be so invested.

     12.  Purchase securities of other investment companies, except to the
extent permitted under the Act.

     If a percentage restriction is adhered to at the time of investment, a
later increase or decrease in percentage resulting from a change in values
or assets will not constitute a violation of such restriction.

     The Fund may make commitments more restrictive than the restrictions
listed above so as to permit the sale of Fund shares in certain states.
Should the Fund determine that a commitment is no longer in the best
interest of the Fund and its shareholders, the Fund reserves the right to
revoke the commitment by terminating the sale of Fund shares in the state
involved.


                            MANAGEMENT OF THE FUND

     Trustees and officers of the Fund, together with information as to
their principal business occupations during at least the last five years,
are shown below.  Each Trustee who is deemed to be an "interested person" of
the Fund, as defined in the Act, is indicated by an asterisk.

Trustees of the Fund

LUCY WILSON BENSON, Trustee.  President of Benson and Associates,
     consultants to business and government.  Mrs. Benson is a director of
     Communications Satellite Corporation, General RE Corporation, The
     Grumman Corporation and Logistics Management Institute.  She is also a
     Trustee of the Alfred P. Sloan Foundation, Vice Chairman of the Board
     of Trustees of Lafayette College, Vice Chairman of the Citizens Network
     for Foreign Affairs and a member of the Council on Foreign Relations.
     Mrs. Benson served as a consultant to the U.S. Department of State and
     to SRI International from 1980 to 1981.  From 1977 to 1980, she was
     Under Secretary of State of Security Assistance, Science and
     Technology.  Her address is 46 Sunset Avenue, Amherst, Massachusetts
     01002.
   

*DAVID W. BURKE, Trustee.  Consultant to the Manager since August 1994.
     From October 1990 to August 1994, Vice President and Chief
     Administrative Officer of the Manager.  From 1977 to 1990, Mr. Burke
     was involved in the management of national television news, as Vice
     President and Executive Vice President of ABC News, and subsequently as
     President of CBS News.  His address is 200 Park Avenue, New York, New York
     10166.

    
   
    

MARTIN D. FIFE, Trustee.  President of Fife Associates, Inc. and other
     companies engaged in the chemical and plastics industries.  His address
     is 30 Rockefeller Plaza, New York, New York 10112.

WHITNEY I. GERARD, Trustee.  Partner of the New York City law firm of
     Chadbourne & Parke.  His address is 30 Rockefeller Plaza, New York, New
     York 10112.

ROBERT R. GLAUBER, Trustee.  Research Fellow, Center for Business and
     Government at the John F. Kennedy School of Government, Harvard
     University, since January 1992.  Mr. Glauber was Under Secretary of the
     Treasury for Finance at the U.S. Treasury Department from May 1989 to
     January 1992.  For more than five years prior thereto, he was a
     Professor of Finance at the Graduate School of Business Administration
     of Harvard University and, from 1985 to 1989, Chairman of its Advanced
     Management Program.  His address is 79 John F. Kennedy Street,
     Cambridge, Massachusetts 02138.

ARTHUR A. HARTMAN, Trustee.  Senior consultant with APCO Associates Inc.
     From 1981 to 1987, he was United States Ambassador to the former Soviet
     Union.  He is a director of the Hartford Insurance Group and a member
     of the advisory councils of several other companies, research
     institutes and foundations.  He is President of the Harvard Board of
     Overseers.  His address is 2738 McKinley Street, N.W., Washington, D.C.
     20015.

GEORGE L. PERRY, Trustee.  An economist and Senior Fellow at the Brookings
     Institution since 1969.  He is co-director of the Brookings panel on
     Economic Activity and editor of its journal, The Brookings Papers.  He
     is also a director of the State Farm Mutual Automobile Association and
     State Farm Life Insurance Company.  His address is 1775 Massachusetts
     Avenue, N.W., Washington, D.C. 10036.
   
    

PAUL D. WOLFOWITZ, Trustee.  Dean of The Paul H. Nitze School of Advanced
     International Studies at Johns Hopkins University.  From 1989 to 1993,
     he was Under Secretary of Defense for Policy.  From 1986 to 1989, he
     was the U.S. Ambassador to the Republic of Indonesia.  From 1982 to
     1986, he was Assistant Secretary of State of East Asian and Pacific
     Affairs of the Department of State.  His address is 1740 Massachusetts
     Avenue, N.W., Washington, D.C.  20036.
   

     The "non-interested" Trustees are also directors of Dreyfus Asset
Allocation Fund, Inc., The Dreyfus Fund Incorporated, Dreyfus California
Municipal Income, Inc., Dreyfus Municipal Income, Inc., Dreyfus New York
Municipal Income, Inc., Dreyfus Short-Term Income Fund, Inc. and The 401 (k)
Fund, and trustees of Dreyfus Short-Intermediate Municipal Bond Fund. The
"non-interested" Trustees, except Mr. Glauber, are also directors of Dreyfus
Liquid Assets, Inc. and trustees of Dreyfus Short-Intermediate Government
Fund.  The "non-interested" Trustees except Mr. Wolfowitz, are also directors
of Dreyfus Worldwide Dollar Money Market Fund, Inc. Mrs. Benson also is a
director of The Dreyfus Third Century Fund, Inc. and The Dreyfus Socially
Responsible Growth Fund, Inc.  Mr. Glauber is also a director of Dreyfus A
Bonds Plus, Inc., Dreyfus Balanced Fund, Inc., Dreyfus Growth and
Income Fund, Inc., Dreyfus Growth Opportunity Fund, Inc., Dreyfus
International Equity Fund, Inc., Dreyfus International Recovery Fund, Inc.
and Dreyfus Money Market Instruments, Inc., and a trustee of Dreyfus
Institutional Money Market Fund and Dreyfus Variable Investment Fund.
    
   
     The Fund does not pay any remuneration to its officers and Trustees
other than fees and expenses to the "non-interested" Trustees, which totaled
$11,816 for the period October 29, 1993 (commencement of operations) through
September 30, 1994 for all such Trustees as a group.  The Manager, and not
the Fund, currently pays these fees and expenses pursuant to an undertaking
described under "Management Agreement."
    

     For so long as the Fund's plans described in the sections captioned
"Service Plan" and "Shareholder Services Plan" remain in effect, the
Trustees of the Fund who are not "interested persons" of the Fund, as
defined in the Act, will be selected and nominated by the Trustees who are
not "interested persons" of the Fund.


     Ordinarily, there will be no meetings of shareholders for the purpose
of electing Trustees unless and until such time as less than a majority of
the Trustees holding office have been elected by shareholders, at which time
the Trustees then in office will call a shareholders' meeting for the
election of Trustees.  Under the Act, shareholders of record of not less
than two-thirds of the outstanding shares of the Fund may remove a Trustee
through a declaration in writing or by vote cast in person or by proxy at a
meeting called for that purpose.  Under the Fund's Agreement and Declaration
of Trust, the Trustees are required to call a meeting of shareholders for
the purpose of voting upon the question of removal of any such Trustee when
requested in writing to do so by the shareholders of record of not less than
10% of the Fund's outstanding shares.
   

Officers of the Fund
    
   
MARIE E. CONNOLLY, President and Treasurer. President and Chief Operating
     Officer of the Distributor and an officer of other investment companies
     advised or administered by the Manager.  From December 1991 to July
     1994, she was President and Chief Compliance Officer of Funds
     Distributor, Inc., a wholly-owned subsidiary of The Boston Company,
     Inc.  Prior to December 1991, she served as Vice President and
     Controller, and later as Senior Vice President, of The Boston Company
     Advisors, Inc.

    
   
JOHN E. PELLETIER, Vice President and Secretary.  Senior Vice President and
     General Counsel of the Distributor and an officer of other investment
     companies advised or administered by the Manager.  From February 1992
     to July 1994, he served as Counsel for The Boston Company Advisors,
     Inc.  From August 1990 to February 1992, he was employed as an
     Associate at Ropes & Gray, and prior thereto, he was employed as an
     Associate at Sidley & Austin.

    
   
FREDERICK C. DEY, Vice President and Assistant Treasurer.  Senior Vice
     President of the Distributor and an officer of other investment
     companies advised or administered by the Manager.  From 1988 to August
     1994, he was Manager of the High Performance Fabric Division of Springs
     Industries, Inc.
    
   
ERIC B. FISCHMAN, Vice President and Assistant Secretary.  Associate General
     Counsel of the Distributor and an officer of other investment companies
     advised or administered by the Manager.  From September 1992 to August
     1994, he was an attorney with the Board of Governors of the Federal
     Reserve System.

    
   
JOSEPH F. TOWER, III, Assistant Treasurer.  Senior Vice President, Treasurer
     and Chief Financial Officer of the Distributor and an officer of other
     investment companies advised or administered by the Manager.  From July
     1988 to August 1994, he was employed by The Boston Company, Inc., where
     he held various management positions in the Corporate Finance and
     Treasury areas.
    
   
JOHN J. PYBURN, Assistant Treasurer.  Vice President of the Distributor and
     an officer of other investment companies advised or administered by the
     Manager.  From 1984 to July 1994, he was Assistant Vice President in
     the Mutual Fund Accounting Department of the Manager.
    
   
PAUL FURCINITO, Assistant Secretary.  Assistant Vice President of the
     Distributor and an officer of other investment companies advised or
     administered by the Manager.  From January 1994 to July 1994, he was a
     Senior Legal Product Manager and, from January 1990 to January 1992,
     he was a mutual fund accountant for The Boston Company Advisors, Inc.
    
   
RUTH D. LEIBERT, Assistant Secretary.  Assistant Vice President of the
     Distributor and an officer of other investment companies advised or
     administered by the Manager.  From March 1992 to July 1994, she was a
     Compliance Officer for The Managers Funds, a registered investment
     company.  From March 1990 until September 1991, she was Development
     Director of The Rockland Center for the Arts and, prior thereto, was
     employed as a Research Assistant for the Bureau of National Affairs.
    

     The address of each officer of the Fund is 200 Park Avenue, New York,
New York, 10166


   


     Trustees and officers of the Fund, as a group, owned less than 1% of
the Fund's shares of beneficial interest outstanding on November 15, 1994.
    

   

     The following persons are known by the Fund to own of record or
beneficially 5% or more of the Fund's outstanding voting securities as of
November 15, 1994:  Class A - Hawkeye Bank, attn. Trust Dept., 431 E. Locust
St., Des Moines, IA 50309 - 22.4%; Banc One Capital Corporation, 1717 Main
Street, Dallas, TX 75201 - 22.4%; Comerica Bank, attn. Fixed Income Dept.,
100 Renaissance Center, Detroit, MI 48243 - 18.2% and Chittendon Trust Co.,
attn. Alan A. Fay, 2 Burlington Square, Burlington, VT 05401 - 7.5%.  Class
B - Compass Bank, attn. Sharon Weaver, P.O. Box 10566, Birmingham, AL 35296
- - 31.6%; Healthspring, 11921 Freedom Drive, Reston, VA. 22090 - 21.4%;
Capital Network Services, attn.  Donna Howell, 1 Bush Street, San Francisco,
CA.  94104 - 13.9%; and Osceola Farms Co., 316 Royal Poinciana Plaza, Palm
Beach, FL 33480 - 8.5%.  A shareholder who beneficially owns, directly or
indirectly, more than 25% of the Fund's voting securities may be deemed a
"control person" (as defined in the Act) of the Fund.
    
   
    



                             MANAGEMENT AGREEMENT

     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "Management of the Fund."


   

     The Manager provides management services pursuant to the Management
Agreement (the "Agreement") dated August 24, 1994 with the Fund, which is
subject to annual approval by (i) the Fund's Board of Trustees or (ii) vote
of a majority (as defined in the Act) of the outstanding voting securities
of the Fund, provided that in either event the continuance also is approved
by a majority of the Trustees who are not "interested persons" (as defined
in the Act) of the Fund or the Manager, by vote cast in person at a meeting
called for the purpose of voting on such approval.  The Agreement was
approved by shareholders at a meeting held on August 4, 1994, and was last
approved by the Fund's Board of Trustees, including a majority of the
Trustees who are not "interested persons" of any party to the Agreement, at
a meeting held on May 12, 1994.  The Agreement is terminable without
penalty, on 60 days' notice, by the Fund's Board of Trustees or by vote of
the holders of a majority of the Fund's shares, or, on not less than 90
days' notice, by the Manager.  The Agreement will terminate automatically in
the event of its assignment (as defined in the Act).
    
   

     The following persons are officers and/or directors of the Manager:
Howard Stein, Chairman of the Board and Chief Executive Officer; Julian M.
Smerling, Vice Chairman of the Board; Joseph S. DiMartino, President and a
director; W. Keith Smith, Chief Operating Officer and a director; Paul H.
Snyder, Vice President and Chief Financial Officer; Daniel C. Maclean, Vice
President and General Counsel; Barbara E. Casey, Vice President--Retirement
Services; Robert F. Dubuss, Vice President; Henry D. Gottmann, Vice
President--Retail; Elie M. Genadry, Vice President--Wholesale; Mark N.
Jacobs, Vice President--Fund Legal and Compliance and Secretary; Jeffrey N.
Nachman, Vice President--Mutual Fund Accounting; Diane M. Coffey, Vice
President--Corporate Communications; Jay R. DeMartine, Vice President--
Marketing; Lawrence S. Kash, Vice Chairman--Distribution; Philip L. Toia,
Vice Chairman--Operations and Administration; Katherine C. Wickham, Vice
President--Human Resources; Maurice Bendrihem, Controller; and Mandell L.
Berman, Frank V. Cahouet, Alvin E. Friedman, Lawrence M. Greene and David B.
Truman, directors.
    
   
     The Manager manages the Fund's portfolio of investments in accordance
with the stated policies of the Fund, subject to the approval of the Fund's
Board of Trustees.  The Manager is responsible for investment decisions, and
provides the Fund with portfolio managers who are authorized by the Trustees
to execute purchases and sales of securities.  The Fund's portfolio managers
are Joseph S. DiMartino, Garitt Kono and Gerald E. Thunelius.  The Manager
also maintains a research department with a professional staff of portfolio
managers and securities analysts who provide research services for the Fund
as well as for other funds advised by the Manager.  All purchases and sales
are reported for the Trustees' review at the meeting subsequent to such
transactions.
    
   
     The Manager maintains office facilities on behalf of the Fund, and
furnishes statistical and research data, clerical help, accounting, data
processing, bookkeeping and internal auditing and certain other required
services.  The Manager also may make such advertising and promotional
expenditures, using its own resources, as it from time to time deems
appropriate.
    
   


     As compensation for the Manager's services, the Fund has agreed to pay
the Manager a monthly management fee at the annual rate of .20 of 1% of
value of the Fund's average daily net assets.  For the period October 29,
1993 (commencement of operations) through September 30, 1994, the management
fee paid by the Fund was $119,741.
    
   
     Unless the Manager gives the Fund's investors at least 90 days' notice
to the contrary, the manager, and not the Fund, will be liable for Fund
expenses (exclusive of taxes, brokerage, interest on borrowings and (with
the prior written consent of the necessary state securities commissions)
extraordinary expenses) other than the following expenses, which will be
borne by the Fund:  (i) the management fee payable by the Fund monthly at
the annual rate of .20 of 1% of the Fund's average daily net assets and (ii)
as to Class B shares only, payments made pursuant to the Fund's Service Plan
at the annual rate of .25 of 1% of the value of the average daily net assets
of Class B.  See "Service Plan."
    

     In addition, the Manager has agreed that if in any fiscal year the
aggregate expenses of the Fund, exclusive of taxes, brokerage, interest on
borrowings and (with the prior written consent of the necessary state
securities commissions) extraordinary expenses, but including the management
fee, exceed the expense limitation of any state having jurisdiction over the
Fund, the Fund may deduct from the payment to be made to the Manager under
the Agreement, or the Manager will bear, such excess expense to the extent
required by state law.  Such deduction or payment, if any, will be estimated
daily, and reconciled and effected or paid, as the case may be, on a monthly
basis.

     The aggregate of the fees payable to the Manager is not subject to
reduction as the value of the Fund's net assets increases.


                            PURCHASE OF FUND SHARES

     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "How to Buy Fund Shares."



     The Distributor.  The Distributor serves as the Fund's distributor
pursuant to an agreement which is renewable annually.  The Distributor also
acts as distributor for the other funds in the Dreyfus Family of Funds and
for certain other investment companies.

     Using Federal Funds.  The Shareholder Services Group, Inc., the Fund's
transfer and dividend disbursing agent (the "Transfer Agent"), or the Fund
may attempt to notify the investor upon receipt of checks drawn on banks
that are not members of the Federal Reserve System as to the possible delay
in conversion into Federal Funds and may attempt to arrange for a better
means of transmitting the money.  If the investor is a customer of a
securities dealer, bank or other financial institution and his order to
purchase Fund shares is paid for other than in Federal Funds, the securities
dealer, bank or other financial institution, acting on behalf of its
customer, will complete the conversion into, or itself advance, Federal
Funds generally on the business day following receipt of the customer order.

The order is effective only when so converted and received by the Transfer
Agent.  An order for the purchase of Fund shares placed by an investor with
a sufficient Federal Funds or cash balance in his brokerage account with a
securities dealer, bank or other financial institution will become effective
on the day that the order, including Federal Funds, is received by the
Transfer Agent.  In some states, banks or other financial institutions
effecting transactions in Fund
shares may be required to register as dealers pursuant to state law.


                                 SERVICE PLAN
                                (CLASS B ONLY)

     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "Service Plan."
   

     Rule 12b-1 (the "Rule") adopted by the Securities and Exchange
Commission under the Act provides, among other things, that an investment
company may bear expenses of distributing its shares only pursuant to a plan
adopted in accordance with the Rule.  The Fund's Board of Trustees has
adopted such a plan (the "Service Plan") with respect to the Fund's Class B
shares.  Pursuant to the Service Plan, the Fund (a) reimburses the
Distributor for distributing Class B shares and (b) pays the Manager,
Dreyfus Service Corporation, a wholly-owned subsidiary of the Manager, and
any affiliate of either of them (collectively "Dreyfus") for advertising and
marketing Class B shares and providing certain services to the holders of Class
B shares.  Under the Service Plan, the Distributor and Dreyfus
may make payments to certain financial institutions, securities dealers and
other financial industry professionals (collectively, "Service Agents") in
respect to these services.  The Fund's Board of Trustees believes that there
is a reasonable likelihood that the Service Plan will benefit the Fund and
the holders of Class B shares.
    
   
     A quarterly report of the amounts expended under the Service Plan, and
the purposes for which such expenditures were incurred, must be made to the
Trustees for their review.  In addition, the Service Plan provides that it
may not be amended to increase materially the costs which holders of Class B
shares may bear pursuant to the Service Plan without the approval of the
holders of Class B shares and that other material amendments of the Service
Plan must be approved by the Board of Trustees, and by the Trustees who are
not "interested persons" (as defined in the Act) of the Fund and have no
direct or indirect financial interest in the operation of the Service Plan
or in any agreements entered into in connection with the Service Plan, by
vote cast in person at a meeting called for the purpose of considering such
amendments.  The Service Plan is subject to annual approval by such vote of
the Trustees cast in person at a meeting called for the purpose of voting on
the Service Plan.  The Service Plan was so approved by the Trustees at a
meeting held on May 12, 1994.  The Service Plan may be terminated at any
time by vote of a majority of the Trustees who are not "interested persons"
and have no direct or indirect financial interest in the operation of the
Service Plan or in any agreements entered into in connection with the
Service Plan or by vote of the holders of a majority of Class B shares.
    
   
     For the period October 29, 1993 (commencement of operations) through
September 30, 1994, the Fund paid $49,702, with respect to Class B, pursuant
to the Service Plan.
    


                           SHAREHOLDER SERVICES PLAN
                                (CLASS A ONLY)

     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "Shareholder Services
Plan."
   

     The Fund has adopted a Shareholder Services Plan (the "Plan") pursuant
to which the Fund has agreed to reimburse Dreyfus Service Corporation for
certain allocated expenses of providing personal services and/or maintaining
shareholder accounts with respect to Class A shares only.  The services
provided may include personal services relating to shareholder accounts,
such as answering shareholder inquiries regarding the Fund and providing
reports and other information, and services related to the maintenance of
shareholder accounts.
    

     A quarterly report of the amounts expended under the Plan, and the
purposes for which such expenditures were incurred, must be made to the
Trustees for their review.  In addition, the Plan provides that material
amendments of the Plan must be approved by the Board of Trustees, and by the
Trustees who are not "interested persons" (as defined in the Act) of the
Fund or the Manager and have no direct or indirect financial interest in the
operation of the Plan, by vote cast in person at a meeting called for the
purpose of considering such amendments.  The Plan is subject to annual
approval by such vote of the Trustees cast in person at a meeting called for
the purpose of voting on the Plan.  The Plan is terminable at any time by
vote of a majority of the Trustees who are not "interested persons" (as
defined in the act and have no direct or indirect financial interest in the
operation of the Plan.
   

     For the period October 29, 1993 (commencement of operations) through
September 30, 1994, no shareholder services fee was paid by the Fund
pursuant to an undertaking by the Manager.
    


                           REDEMPTION OF FUND SHARES

     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "How to Redeem Fund
Shares."

     Redemption by Wire or Telephone.  By using this procedure, the investor
authorizes the Transfer Agent to act on wire or telephone redemption
instructions from any person representing himself or herself to be an
authorized representative of the investor and reasonably believed by the
Transfer Agent to be genuine.  Ordinarily, the Fund will initiate payment
for shares redeemed pursuant to this procedure on the next business day
after receipt if the Transfer Agent receives the redemption request in
proper form.  Such payment will be made to a bank that is a member of the
Federal Reserve System.

     Investors with access to telegraphic equipment may wire redemption
requests to the Transfer Agent by employing the following transmittal code
which may be used for domestic or overseas transmission:

                               Transfer Agent's
     Transmittal Code          Answer Back Sign
     ---------------           ----------------
     144295                    144295 TSSG PREP

     Investors who do not have direct access to telegraphic equipment may
have the wire transmitted by contacting a TRT Cables operator at 1-800-654-
7171, toll free.  Investors should advise the operator that the above
transmittal code must be used and should also inform the operator of the
Transfer Agent's answer back sign.

     Redemption Commitment.  The Fund has committed itself to pay in cash
all redemption requests by any shareholder of record, limited in amount
during any 90-day period to the lesser of $250,000 or 1% of the value of the
Fund's net assets at the beginning of such period.  Such commitment is
irrevocable without the prior approval of the Securities and Exchange
Commission.  In the case of requests for redemption in excess of such
amount, the Board of Trustees reserves the right to make payments in whole
or in part in securities or other assets of the Fund in case of an emergency
or at any time a cash distribution would impair the liquidity of the Fund to
the detriment of the existing shareholders.  In such event the securities
would be valued in the same manner as the Fund's portfolio is valued.  If
the recipient sold such securities, brokerage charges would be incurred.

     Suspension of Redemptions.  The right of redemption may be suspended or
the date of payment postponed (a) during any period when the New York Stock
Exchange is closed (other than a customary weekend and holiday closing), (b)
when trading in the markets the Fund ordinarily utilizes is restricted, or
when an emergency exists as determined by the Securities and Exchange
Commission so that disposal of the Fund's investments or determination of
its net asset value is not reasonably practicable, or (c) for such other
periods as the Securities and Exchange Commission by order may permit to
protect the Fund's shareholders.


                       DETERMINATION OF NET ASSET VALUE

     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "How to Buy Fund Shares."

     Valuation of Portfolio Securities.  The Fund's investments are valued
each business day using available market quotations or at fair value as
determined by one or more independent pricing services (collectively, the
"Service") approved by the Board of Trustees.  The Service may use available
market quotations, employ electronic data processing techniques and/or a
matrix system to determine valuations.  The Service's procedures are
reviewed by the Fund's officers under the general supervision of the Board
of Trustees.  Expenses and fees, including the management fee, are accrued
daily and are taken into account for the purpose of determining the net
asset value of the relevant Class of Fund shares.

     New York Stock Exchange Closings.  The holidays (as observed) on which
the New York Stock Exchange and Transfer Agent are closed currently are:
New Year's Day, Presidents' Day, Good Friday, Memorial Day, Independence
Day, Labor Day, Thanksgiving and Christmas.


                      DIVIDENDS, DISTRIBUTIONS AND TAXES

     The following information supplements and should read in conjunction
with the section in Fund's Prospectus entitled "Dividends, Distributions and
Taxes"
   

     Management believes that the Fund has qualified as a "regulated
investment company" under the Internal Revenue Code of 1986, as amended (the
"Code"), for the fiscal year ended September 30, 1994.  The Fund intends to
continue to so qualify if such qualification is in the best interests of its
shareholders.  Qualification as a regulated investment company relieves the
Fund from any liability for federal income taxes to the extent its earnings
are distributed in accordance with the applicable provisions of the code.
The term "regulated investment company" does not imply the supervision of
management or investment practices or policies by any government agency.
    

     Any dividend or distribution paid shortly after an investor's purchase
may have the effect of reducing the aggregate net asset value of his shares
below the cost of his investment.  Such a dividend or distribution would be
a return on investment in an economic sense, although taxable as stated
above.  In addition, the Code provides that if a shareholders holds shares
of the Fund for six months or less and has received a capital gain
distribution with respect to such shares, any loss incurred on the sale of
such shares will be treated as a long-term capital  loss to the extent of
the capital gain distribution received.

     Ordinarily, gains and losses realized from portfolio transactions will
be treated as capital gain or loss.  However, all or a portion of any gain
realized by the Fund from the sale or other disposition of certain market
discount bonds will be treated as ordinary income under Section 1276 of the
Code.

     Investment by the Fund in securities issued or acquired at a discount
or providing for deferred interest or for payment of interest in the form of
additional obligations could, under special tax rules, affect the amount,
timing and character of distributions to shareholders.  For example, the
Fund may be required to take into account annually a portion of the discount
(or deemed discount) as which such securities were issued and to distribute
such portion in order to maintain its qualification as a regulated
investment company.  In such case, the Fund may have to dispose of
securities which it might otherwise have continued to hold in order to
generate cash to satisfy these distribution requirements.


                            PORTFOLIO TRANSACTIONS

     Portfolio securities ordinarily are purchased directly from the issuer
or from an underwriter or a market maker for the securities.  Usually no
brokerage commissions are paid by the Fund for such purchases.  Purchases
from underwriters of portfolio securities include a concession paid by the
issuer to the underwriter and the purchase price paid to, and sale price
received from, market makers for the securities may reflect the spread
between the bid and asked price.  No brokerage commissions have been paid by
the Fund to date.
   

     Transactions are allocated to various dealers by the Fund's portfolio
managers in their best judgment.  The primary consideration is prompt and
effective execution of orders at the most favorable price.  Subject to that
primary consideration, dealers may be selected for research, statistical or
other services to enable the Manager to supplement its own research and
analysis with the views and information of other securities firms and may be
selected based upon their sales of Fund shares.
    

     Research services furnished by brokers through which the Fund effects
securities transactions may be used by the Manager in advising other funds
it advises and, conversely, research services furnished to the Manager by
brokers in connection with other funds the Manager advises may be used by
the Manager in advising the Fund.  Although it is not possible to place a
dollar value on these services, it is the opinion of the Manager that the
receipt and study of such services should not reduce the overall expenses of
its research department.


                               INVESTOR SERVICES

     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "Investor Services."
   

     Fund Exchanges.  Shares will be exchanged at the net asset value next
determined after receipt of an exchange request in proper form.  By using
the Telephone Exchange Privilege, the investor authorizes the Transfer Agent
to act on telephonic exchange instructions from any person representing
himself or herself to be an authorized representative of the investor and
reasonably believed by the Transfer Agent to be genuine.  Telephone
exchanges may be subject to limitations as to the amount involved or the
number of telephone exchanges permitted.  Shares in certificate form are not
eligible for telephone exchange.
    

     Dreyfus Auto-Exchange Privilege.  Dreyfus Auto-Exchange Privilege
permits an investor to purchase, in exchange for shares of the Fund, shares
of Dreyfus Cash Management, Dreyfus Cash Management Plus, Inc., Dreyfus
Government Cash Management, Dreyfus Municipal Cash Management Plus, Dreyfus
New York Municipal Cash Management, Dreyfus Tax Exempt Cash Management,
Dreyfus Treasury Cash Management and Dreyfus Treasury Prime Cash Management.
This Privilege is available only for existing accounts.  Shares will be
exchanged on the basis of relative net asset value.  Enrollment in or
modification or cancellation of the Privilege is effective three business
days following notification by the investor.  An investor will be notified
if its account falls below the amount designated to be exchanged under this
Privilege.  In this case, an investor's account will fall to zero unless
additional investments are made in excess of the designated amount prior to
the next Auto-Exchange Transaction.  Shares issued in certificate form are
not eligible for Auto-Exchange.
   

     Fund exchanges and the Dreyfus Auto-Exchange Privilege are available to
investors resident in any state in which shares of the Fund being acquired
may legally be sold.  Shares may be exchanged only between accounts having
identical names and other identifying designations.
    
   

     The Fund reserves the right to reject any exchange request in whole or
in part.  The Fund Exchanges service or Dreyfus Auto-Exchange Privilege may
be modified or terminated at any time upon notice to investors.
    


                            PERFORMANCE INFORMATION

     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "Performance
Information."
   

     For the thirty-day period ended September 30, 1994, the Fund's current
yield for Class A was 5.47%.  For the thirty-day period ended September 30,
1994, the Fund's current yield for Class B was 5.22%.  Current yield is
computed pursuant to a formula which operates as follows:  The amount of the
Fund's expenses accrued for the 30-day period (net of reimbursements) is
subtracted from the amount of the dividends and interest earned (computed in
accordance with regulatory requrements) by the Fund during the period.  That
result is then divided by the product of:  (a) the average daily number of
shares outstanding during the period that were entitled to receive
dividends, and (b) the net asset value per share on the last day of the
period less any undistributed earned income per share reasonably expected to
be declared as a dividend shortly thereafter.  The quotient is then added to
1, and that sum is raised to the 6th power, after which 1 is subtracted.
The current yield is then arrived at by multiplying the result by 2.
    
   

     The Fund's average annual total return for Class A for the period
October 29, 1993 to September 30, 1994 was 3.08%.  The Fund's average annual
total return for Class B for the period October 29, 1993 to September 30,
1994 was 3.40%.  Average annual total return is calculated by determining
the ending redeemable value of an investment purchased with a hypothetical
$1,000 payment made at the beginning of the period (assuming the
reinvestment of dividends and distributions), dividing by the amount of the
initial investment, taking the "n"th root of the quotient (where "n" is the
number of years in the period) and subtracting 1 from the result.
    


     The Fund's total return for Class A for the period October 29, 1993 to
September 30, 1994, was 2.84%.  The Fund's total return for Class B for the
period October 29, 1993 to September 30, 1994 was 3.13%.  Total return is
calculated by subtracting the amount of the net asset value per share at the
beginning of a stated period from the net asset value per share at the end
of the period (after giving effect to the reinvestment of dividends and
distributions during the period), and dividing the result by the net asset
value per share at the beginning of the period.

     From time to time, advertising materials for the Fund may refer to or
discuss then-current or past economic conditions, developments and/or
events, including actual or proposed tax legislation.  From time to time,
advertising materials for the Fund may also refer to statistical or other
information concerning trends relating to investment companies, as compiled
by industry associations such as the Investment Company Institute.  From
time to time advertising materials for the Fund also may refer to
Morningstar ratings and related analyses supporting the rating.


                          INFORMATION ABOUT THE FUND


     The following information supplements and should be read in conjunction
with the section in the Fund's Prospectus entitled "General Information."

     Each Fund share has one vote and, when issued and paid for in
accordance with the terms of the offering, is fully paid and nonassessable.
Fund shares have no preemptive, subscription or conversion rights and are
freely transferable.

     The Fund sends annual and semi-annual financial statements to all its
shareholders.


          CUSTODIAN, TRANSFER AND DIVIDEND DISBURSING AGENT, COUNSEL
                           AND INDEPENDENT AUDITORS

     The Bank of New York, 110 Washington Street, New York, New York 10286,
acts as custodian of the Fund's investments.  The Shareholder Services
Group, Inc., a subsidiary of First Data Corporation, P.O. Box 9671,
Providence, Rhode Island 02940-9671, is the Fund's transfer and dividend
disbursing agent.  Neither The Bank of New York nor The Shareholder Services
Group, Inc. has any part in determining the investment policies of the Fund
or which securities are to be purchased or sold by the Fund.

     Stroock & Stroock & Lavan, 7 Hanover Square, New York, New York 10004-
2696, as counsel for the Fund, has rendered its opinion as to certain legal
matters regarding the due authorization and valid issuance of the shares of
beneficial interest being sold pursuant to the Fund's Prospectus.
   

     Ernst & Young LLP, 787 Seventh Avenue, New York, New York 10019,
independent auditors, have been selected as auditors of the Fund.


<TABLE>
<CAPTION>

DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
STATEMENT OF INVESTMENTS                                  SEPTEMBER 30, 1994
                                                                                             PRINCIPAL
U.S. TREASURY NOTES-107.7%                                                                    AMOUNT              VALUE
                                                                                           ----------         ------------
    <S>                                                                                  <C>                  <C>
    4 1/4%, 7/31/1995.......................................................             $  10,000,000        $  9,870,310
   10 1/2%, 8/15/1995......................................................                  2,500,000           2,596,875
    4 1/4%, 11/30/1995......................................................                20,000,000          19,593,760
    9 1/4%, 1/15/1996.......................................................                10,000,000          10,365,630
    7 5/8%, 4/30/1996.......................................................                 5,000,000           5,091,405
    4 1/4%, 5/15/1996.......................................................                 5,000,000           4,835,940
    7 3/8%, 5/15/1996.......................................................                20,000,000          20,290,620
    6 1/4%, 8/31/1996.......................................................                10,000,000           9,943,750
    6 1/2%, 9/30/1996.......................................................                30,000,000          29,950,770
    6 1/2%, 8/15/1997.......................................................                10,000,000           9,757,810
                                                                                                               ------------
TOTAL U.S. TREASURY NOTES
    (cost $122,898,582).....................................................                                  $122,296,870
                                                                                                              ============
SHORT-TERM INVESTMENTS-.4%
REPURCHASE AGREEMENT;
    Yamaichi International (America), Inc., 4 3/4%
    dated 9/30/1994, due 10/3/1994 in the amount
    of $436,173 (fully collateralized by $420,000 U.S.
    Treasury Notes, 8 1/2%, 5/15/1995, value $440,668)
    (cost $436,000).........................................................            $      436,000        $     436,000
                                                                                                               ============
TOTAL INVESTMENTS
    (cost $123,334,582).....................................................                     108.1%       $ 122,732,870
                                                                                                 ======       =============
LIABILITIES, LESS CASH AND RECEIVABLES......................................                      (8.1%)      $  (9,164,776)
                                                                                                 ======       =============
NET ASSETS  ...........................................................                          100.0%       $ 113,568,094
                                                                                                 ======       =============
                                See notes to financial statements.
</TABLE>

<TABLE>
<CAPTION>

DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
STATEMENT OF ASSETS AND LIABILITIES                        SEPTEMBER 30, 1994
ASSETS:
    <S>                                                                                 <C>                   <C>
    Investments in securities, at value
      (cost $123,334,582)-see statement.....................................                                  $122,732,870
    Cash....................................................................                                       183,199
    Interest receivable.....................................................                                     1,536,284
                                                                                                              -------------
                                                                                                               124,452,353
LIABILITIES:
    Due to the Dreyfus Corporation..........................................            $     25,432
    Payable for investment securities purchased.............................               9,992,052
    Payable for shares of Beneficial Interest redeemed......................                 866,775            10,884,259
                                                                                        ---------------       --------------
NET ASSETS  ................................................................                                  $113,568,094
                                                                                                              =============
REPRESENTED BY:
    Paid-in capital.........................................................                                  $114,938,486
    Accumulated net realized (loss) on investments..........................                                      (768,680)
    Accumulated gross unrealized (depreciation) on investments..............                                      (601,712)
                                                                                                              -------------
NET ASSETS at value.........................................................                                  $113,568,094
                                                                                                              =============
Shares of Beneficial Interest outstanding:
    Class A Shares
      (unlimited number of $.001 par value shares authorized)...............                                    46,152,728
                                                                                                              =============
    Class B Shares
      (unlimited number of $.001 par value shares authorized)...............                                    11,752,885
                                                                                                              =============
NET ASSET VALUE per share:
    Class A Shares
      ($90,421,495 / 46,152,728 shares).....................................                                        $1.96
                                                                                                                    ======
    Class B Shares
      ($23,146,599 / 11,752,885 shares).....................................                                        $1.97
                                                                                                                    ======
                               See notes to financial statements.
</TABLE>

<TABLE>
<CAPTION>


DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
STATEMENT OF OPERATIONS
FROM OCTOBER 29, 1993 (COMMENCEMENT OF OPERATIONS) TO SEPTEMBER 30, 1994
INVESTMENT INCOME:
    <S>                                                                                    <C>                   <C>
    INTEREST INCOME.........................................................                                     $3,328,950
    EXPENSES:
      Management fee-Note 2(a)..............................................               $119,741
      Distribution fees (Class B shares)-Note 2(b)..........................                 49,702
                                                                                           ---------
          TOTAL EXPENSES....................................................                                        169,443
                                                                                                                 ----------
          INVESTMENT INCOME-NET.............................................                                      3,159,507
REALIZED AND UNREALIZED (LOSS) ON INVESTMENTS:
    Net realized (loss) on investments-Note 3...............................               $(768,680)
    Net unrealized (depreciation) on investments............................                (601,712)
                                                                                           ----------
          NET REALIZED AND UNREALIZED (LOSS) ON INVESTMENTS.................                                     (1,370,392)
                                                                                                                 ----------
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS........................                                     $1,789,115
                                                                                                                 ----------
                                 See notes to financial statements.
</TABLE>

<TABLE>
<CAPTION>


DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
STATEMENT OF CHANGES IN NET ASSETS
FROM OCTOBER 29, 1993 (COMMENCEMENT OF OPERATIONS) TO SEPTEMBER 30, 1994
OPERATIONS:
    <S>                                                                                                       <C>
    Investment income-net..................................................................                   $    3,159,507
    Net realized (loss) on investments.....................................................                         (768,680)
    Net unrealized (depreciation) on investments for the period............................                         (601,712)
                                                                                                               --------------
      NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS.................................                         1,789,115
                                                                                                               --------------
DIVIDENDS TO SHAREHOLDERS FROM:
    Investment income-net:
      Class A shares.......................................................................                        (2,162,627)
      Class B shares.......................................................................                          (996,880)
                                                                                                               --------------
          TOTAL DIVIDENDS..................................................................                        (3,159,507)
                                                                                                               --------------
BENEFICIAL INTEREST TRANSACTIONS:
    Net proceeds from shares sold:
      Class A shares.......................................................................                       189,416,535
      Class B shares.......................................................................                        54,832,853
    Dividends reinvested:
      Class A shares.......................................................................                         1,141,340
      Class B shares.......................................................................                           925,959
    Cost of shares redeemed:
      Class A shares.......................................................................                       (99,275,672)
      Class B shares.......................................................................                       (32,202,529)
                                                                                                               --------------
          INCREASE IN NET ASSETS FROM BENEFICIAL INTEREST TRANSACTIONS.....................                       114,838,486
                                                                                                               --------------
            TOTAL INCREASE IN NET ASSETS...................................................                       113,468,094
NET ASSETS:
    Beginning of period-Note 1.............................................................                           100,000
                                                                                                               --------------
    End of period..........................................................................                      $113,568,094
                                                                                                                 =============

</TABLE>


<TABLE>
<CAPTION>

                                                                                                         SHARES
                                                                                            --------------------------------
                                                                                            PERIOD ENDED SEPTEMBER 30, 1994
                                                                                           ----------------------------------
                                                                                             CLASS A                 CLASS B
                                                                                            ---------               ---------
<S>                                                                                        <C>                   <C>
CAPITAL SHARE TRANSACTIONS:
    Shares sold..........................................................                  95,733,812            27,524,886
    Shares issued for dividends reinvested...............................                     579,653               467,409
    Shares redeemed......................................................                 (50,185,737)          (16,264,410)
                                                                                          _______------         _______------
      NET INCREASE IN SHARES OUTSTANDING.................................                   46,127,728           11,727,885
                                                                                          =============         ==============
                         See notes to financial statements.

</TABLE>



DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
FINANCIAL HIGHLIGHTS
    Reference is made to page 3 of the Fund's Prospectus dated January 28,
1995.
                       See notes to financial statements.

DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
NOTES TO FINANCIAL STATEMENTS
NOTE 1-SIGNIFICANT ACCOUNTING POLICIES:
    Dreyfus Institutional Short Term Treasury Fund (the "Fund") was organized
as a Massachusetts business trust on March 12, 1992 and had no operations
until October 29, 1993 (commencement of operations) other than matters
relating to its organization and registration as a diversified open-end
management investment company under the Investment Company Act of 1940
("Act") and the Securities Act of 1933 and the sale and issuance of 25,000
Class A shares and 25,000 Class B shares of Beneficial Interest ("Initial
Shares") to The Dreyfus Corporation ("Manager"). Dreyfus Service Corporation
acted as the distributor of the Fund's shares until August 24, 1994. Dreyfus
Service Corporation is a wholly-owned subsidiary of the Manager. Effective
August 24, 1994, the Manager became a direct subsidiary of Mellon Bank, N.A.
    On August 24, 1994, Premier Mutual Fund Services, Inc. (the
"Distributor") was engaged as the Fund's distributor. The Distributor,
located at One Exchange Place, Boston, Massachusetts 02109, is a wholly-owned
subsidiary of Institutional Administration Services, Inc., a provider of
mutual fund administration services, the parent company of which is Boston
Institutional Group, Inc.
    The Fund offers both Class A and Class B shares. Class A shares are
subject to a Shareholder Services Plan and Class B shares are subject to a
Service Plan adopted pursuant to Rule 12b-1 under the Act. Other differences
between the two Classes include the services offered to and the expenses
borne by each Class and certain voting rights.
    (A) PORTFOLIO VALUATION: The Fund's investments (excluding short-term
investments) are valued at the mean between the quoted bid prices and asked
prices. Short-term investments are carried at amortized cost, which
approximates value.
    (B) SECURITIES TRANSACTIONS AND INVESTMENT INCOME: Securities
transactions are recorded on a trade date basis. Realized gain and loss from
securities transactions are recorded on the identified cost basis. Interest
income including, where applicable, amortization of discount on investments,
is recognized on the accrual basis.
    The Fund may enter into repurchase agreements with financial
institutions, deemed to be creditworthy by the Fund's Manager, subject to the
seller's agreement to repurchase and the Fund's agreement to resell such
securities at a mutually agreed upon price. Securities purchased subject to
repurchase agreements are deposited with the Fund's custodian and, pursuant
to the terms of the repurchase agreement, must have an aggregate market value
greater than or equal to the repurchase price plus accrued interest at all
times. If the value of the underlying securities falls below the value of the
repurchase price plus accured interest, the Fund will require the seller to
deposit additional collateral by the next business day. If the request for
additional collateral is not met, or the seller defaults on its repurchase
obligation, the Fund maintains the right to sell the underlying securities at
market value and may claim any resulting loss against the seller.
    (C) DIVIDENDS TO SHAREHOLDERS: It is the policy of the Fund to declare
dividends daily from investment income-net. Such dividends are paid monthly.
Dividends from net realized capital gain are normally declared and paid
annually, but the Fund may make distributions on a more frequent basis to
comply with the distribution requirements of the Internal Revenue Code. To
the extent that net realized capital gain can be offset by capital loss
carryovers, if any, it is the policy of the Fund not to distribute such gain.
DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
    (D) FEDERAL INCOME TAXES: It is the policy of the Fund to continue to
qualify as a regulated investment company, if such qualification is in the
best interest of its shareholders, by complying with the applicable
provisions of the Internal Revenue Code, and to make distributions of taxable
income sufficient to relieve it from substantially all Federal income and
excise taxes.
NOTE 2-MANAGEMENT FEE AND OTHER TRANSACTIONS WITH AFFILIATES:
    (A) Pursuant to a management agreement ("Agreement") with the Manager,
the management fee is computed at the annual rate of .20 of 1% of the average
daily value of the Fund's net assets and is payable monthly.
    The Agreement provides for an expense reimbursement from the Manager
should the Fund's aggregate expenses, exclusive of taxes, brokerage, interest
on borrowings and extraordinary expenses, exceed the expense limitation of
any state having jurisdiction over the Fund for any full fiscal year. The
most stringent state expense limitation applicable to the Fund presently
requires reimbursement of expenses in any full fiscal year that such expenses
(excluding certain expenses as described above) exceed 2 1/2% of the first
$30 million, 2% of the next $70 million and 1 1/2% of the excess over $100
million of the average value of the Funds' net assets in accordance with
California "blue sky" regulations. The Manager, and not the Fund, is liable
for those expenses of the Fund (excluding certain expenses as described
above) other than management fee, and with respect to the Fund's Class B
shares, Rule 12b-1 Service Plan expenses.
    The Manager may modify the existing undertaking provided that the Fund's
shareholders are given 90 days prior notice.
    (B) On August 4, 1994, Fund shareholders approved the adoption of a new
Class B Service Plan (the "Plan") pursuant to Rule 12b-1 under the Act.
Effective August 24, 1994, the Fund reimburses the Distributor for
distributing the Fund's Class B shares. The Fund also pays The Dreyfus
Corporation and Dreyfus Service Corporation, and their affiliates
(collectively "Dreyfus") for advertising and marketing relating to the Fund's
Class B shares and for providing certain services relating to Class B
shareholder accounts, such as answering shareholder inquiries regarding the
Fund and providing reports and other information, and services related to the
maintenance of shareholder accounts ("Servicing"), at an aggregate annual
rate of .25 of 1% of the value of the Fund's Class B average daily net
assets. Both the Distributor and Dreyfus may pay one or more Service Agents a
fee in respect of the Fund's Class B shares owned by the shareholders with
whom the Service Agent has a Servicing relationship or for whom the Service
Agent is the dealer or holder of record. Both the Distributor and Dreyfus
determine the amounts, if any, to be paid to the Service Agents under the
Plan and the basis on which such payments are made. The fees payable under
the Plan are payable without regard to actual expenses incurred.
    Prior to August 24, 1994, the Fund's Service Plan ("Prior Class B Service
Plan") provided that the Fund pay Dreyfus Service Corporation at an annual
rate of .25 of 1% of the value to the Fund's Class B shares average daily net
assets, for costs and expenses in connection with advertising, marketing and
distributing Class B shares and for providing certain services to holders of
Class B shares. Dreyfus Service Corporation made payments to one or more
Service Agents based on the value of the Fund's Class B shares owned by
clients of the Service Agent.
    During the period ended September 30, 1994, $6,928 was charged to the
Fund pursuant to the Plan and $42,774 was charged to the Fund pursuant to the
Prior Class B Service Plan.
DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
    (C) Prior to August 24, 1994 certain officers and trustees of the Fund
were "affiliated persons," as defined in the Act, of the Manager and/or
Dreyfus Service Corporation. Each trustee who is not an "affiliated person"
receives from the Fund an annual fee of $1,000 and an attendance fee of $250
per meeting.
NOTE 3-SECURITIES TRANSACTIONS:
    The aggregate amount of purchases and sales of investment securities,
other than short-term securities, during the period ended September 30, 1994,
amounted to $1,763,026,870 and $1,649,381,346, respectively.
    At September 30, 1994, the cost of investments for Federal income tax
purposes was substantially the same as the cost for financial reporting
purposes (see the Statement of Investments).
DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
SHAREHOLDERS AND BOARD OF DIRECTORS
DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
    We have audited the accompanying statement of assets and liabilities of
Dreyfus Institutional Short Term Treasury Fund, including the statement of
investments, as of September 30, 1994, and the related statements of
operations and changes in net assets and financial highlights for the period
from October 29, 1993 (commencement of operations) to September 30, 1994.
These financial statements and financial highlights are the responsibility of
the Fund's management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audit.
    We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures
in the financial statements. Our procedures included confirmation of
securities owned as of September 30, 1994 by correspondence with the custodian
 and brokers. An audit also includes assessing the accounting principles used
and significant estimates made by management, as well as evaluating the
overall financial statement presentation. We believe that our audit provides
a reasonable basis for our opinion.
    In our opinion, the financial statements and financial highlights
referred to above present fairly, in all material respects, the financial
position of Dreyfus Institutional Short Term Treasury Fund at September 30,
1994, and the results of its operations, the changes in its net assets and
the financial highlights for the period from October 29, 1993 to September
30, 1994, in conformity with generally accepted accounting principles.
                                              [ERNST AND YOUNG LLP SIGNATURE]
New York, New York
November 1, 1994

          DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND     




                Dreyfus Institutional Short Term Treasury Fund


                           PART C. OTHER INFORMATION
                           _________________________


Item 24.   Financial Statements and Exhibits. - List
_______    _________________________________________

     (a)   Financial Statements:

                Included in Part A of the Registration Statement
   

                Condensed Financial Information for the period from October
                29, 1993 (commencement of operations) to September 30, 1994.
    

                Included in Part B of the Registration Statement:
   

                     Statement of Investments--September 30, 1994

    
   
                     Statement of Assets and Liabilities--September 30, 1994

    
   
                     Statement of Operations--for the period October 29, 1993
                     (commencement of operations) to September 30, 1994
    
   
                     Statement of Changes in Net Assets--for the period
                     October 29, 1993 (commencement of operations) to
                     September 30, 1994
    

                     Notes to Financial Statements
   

                     Report of Ernst & Young LLP, Independent Auditors, dated
                     November 1, 1994.
    






Schedules No. I through VII and other financial statement information, for
which provision is made in the applicable accounting regulations of the
Securities and Exchange Commission, are either omitted because they are not
required under the related instructions, they are inapplicable, or the
required information is presented in the financial statements or notes
thereto which are included in Part B of the Registration Statement.


Item 24.   Financial Statements and Exhibits. - List (continued)
_______    _____________________________________________________

  (b)      Exhibits:

  (1)      Registrant's Declaration of Trust are incorporated by reference to
           Exhibit (1) of Pre-Effective Amendment No. 1 to the Registration
           Statement on Form N-1A, filed on October 8, 1993, and Exhibit
           (1)(b) of Post-Effective Amendment No. 1 to the Registration
           Statement on Form N-1A, filed on April 29, 1994.

  (2)      Registrant's By-Laws, as amended, are incorporated by reference to
           Exhibit (2) of Post-Effective Amendment No. 1 to the Registration
           Statement on Form N-1A, filed on April 29, 1994.

  (4)      Specimen certificate for the Registrant's securities is
           incorporated by reference to Exhibit (4) of Pre-Effective
           Amendment No.  1 to the Registration Statement on Form N-1A, filed
           on October 8, 1993.
   

  (5)      Management Agreement.
    
   
  (6)(a)   Distribution Agreement.
    
   
  (6)(b)   Forms of Service Agreement.
    


  (8)      Amended and Restated Custody Agreement is incorporated by
           reference to Exhibit 8 of Post-Effective Amendment No. 1 to the
           Registration Statement on Form N-1A, filed on October 8, 1994.

  (10)     Opinion and consent of Registrant's counsel is incorporated by
           reference to Exhibit (10) of Pre-Effective Amendment No. 1 to the
           Registration Statement on Form N-1A, filed on October 8, 1993.

  (11)     Consent of Independent Auditors.
   

  (15)     Service Plan.
    

  (16)     Schedules of Computation of Performance Data are incorporated by
           reference to Exhibit (16) of Post-Effective Amendment No. 1 to the
           Registration Statement on Form N-1A, filed on October 8, 1993.



Item 24.   Financial Statements and Exhibits. - List (continued)
_______    _____________________________________________________

           Other Exhibits
           ______________

                (a)  Powers of Attorney of the Trustees and officers

                (b)  Certificate of Secretary

Item 25.   Persons Controlled by or under Common Control with Registrant.
_______    ______________________________________________________________

           Not Applicable

Item 26.   Number of Holders of Securities.
_______    ________________________________

            (1)                              (2)
   

                                                Number of Record
         Title of Class                  Holders as of November 15, 1994
         ______________                  _____________________________

         Beneficial Interest
         (Par value $.001)
         Class A                                         35
         Class B                                         31

Item 27.    Indemnification
_______     _______________

         The Statement as to the general effect of any contract,
arrangements or statute under which a trustee, officer, underwriter or
affiliated person of the Registrant is insured or indemnified in any manner
against any liability which may be incurred in such capacity, other than
insurance provided by any director, officer, affiliated person or
underwriter for their own protection, is incorporated by reference to Item 4
of Part II of  Pre-Effective Amendment No. 1 to the Registration Statement
on Form N-1A, filed on October 8, 1993.

         Reference is also made to the Distribution Agreement filed as
Exhibit (6)(a).

Item 28.    Business and Other Connections of Investment Adviser.
_______     ____________________________________________________

            The Dreyfus Corporation ("Dreyfus") and subsidiary companies
comprise a financial service organization whose business consists primarily
of providing investment management services as the investment adviser,
manager and distributor for sponsored investment companies registered under
the Investment Company Act of 1940 and as an investment adviser to
institutional and individual accounts.  Dreyfus also serves as sub-
investment adviser to and/or administrator of other investment companies.
Dreyfus Service Corporation, a wholly-owned subsidiary of Dreyfus, serves
primarily as a registered broker-dealer of shares of investment companies
sponsored by Dreyfus and of other investment companies  for which Dreyfus
acts as investment adviser, sub-investment adviser or administrator.
Dreyfus Management, Inc., another wholly-owned subsidiary, provides
investment management services to various pension plans, institutions and
individuals.

Item 28.  Business and Other Connections of Investment Adviser (continued)
________  ________________________________________________________________

          Officers and Directors of Investment Adviser
          ____________________________________________


Name and Position
with Dreyfus                  Other Businesses
_________________             ________________

MANDELL L. BERMAN             Real estate consultant and private investor
Director                           29100 Northwestern Highway, Suite 370
                                   Southfield, Michigan 48034;
                              Past Chairman of the Board of Trustees of
                              Skillman Foundation.
                              Member of The Board of Vintners Intl.

FRANK V. CAHOUET              Chairman of the Board, President and
Director                      Chief Executive Officer:
                                   Mellon Bank Corporation
                                   One Mellon Bank Center
                                   Pittsburgh, Pennsylvania 15258;
                                   Mellon Bank, N.A.
                                   One Mellon Bank Center
                                   Pittsburgh, Pennsylvania 15258
                              Director:
                                   Avery Dennison Corporation
                                   150 North Orange Grove Boulevard
                                   Pasadena, California 91103;
                                   Saint-Gobain Corporation
                                   750 East Swedesford Road
                                   Valley Forge, Pennsylvania 19482;
                                   Teledyne, Inc.
                                   1901 Avenue of the Stars
                                   Los Angeles, California 90067

ALVIN E. FRIEDMAN             Senior Adviser to Dillon, Read & Co. Inc.
Director                           535 Madison Avenue
                                   New York, New York 10022;
                                   Director and member of the Executive
                                   Committee of Avnet, Inc.**

DAVID B. TRUMAN               Educational consultant;
Director                      Past President of the Russell Sage Foundation
                                   230 Park Avenue
                                   New York, New York 10017;
                              Past President of Mount Holyoke College
                                   South Hadley, Massachusetts 01075;
                              Former Director:
                                   Student Loan Marketing Association
                                   1055 Thomas Jefferson Street, N.W.
                                   Washington, D.C. 20006;
                              Former Trustee:
                                   College Retirement Equities Fund
                                   730 Third Avenue
                                   New York, New York 10017

HOWARD STEIN                  Chairman of the Board:
Chairman of the Board and          Dreyfus Acquisition Corporation*;
Chief Executive Officer            The Dreyfus Consumer Credit Corporation*;
                                   Dreyfus Land Development Corporation*;
                                   Dreyfus Management, Inc.*;
                                   Dreyfus Service Corporation*;
                              Chairman of the Board and Chief Executive
                              Officer:
                                   Major Trading Corporation*;
                              Director:
                                   Avnet, Inc.**;
                                   Dreyfus America Fund++++
                                   The Dreyfus Fund International
                                   Limited+++++
                                   World Balanced Fund+++
                                   Dreyfus Partnership Management,
                                        Inc.*;
                                   Dreyfus Personal Management, Inc.*;
                                   Dreyfus Precious Metals, Inc.*;
                                   Dreyfus Realty Advisors, Inc.+++;
                                   Dreyfus Service Organization, Inc.*;
                                   The Dreyfus Trust Company++;
                                   Seven Six Seven Agency, Inc.*;
                              Trustee:
                                   Corporate Property Investors
                                   New York, New York;

JULIAN M. SMERLING            Director and Executive Vice President:
Vice Chairman of the               Dreyfus Service Corporation*;
Board of Directors            Director and Vice President:
                                   Dreyfus Service Organization, Inc.*;
                              Vice Chairman and Director:
                                   The Dreyfus Trust Company++;
                                   The Dreyfus Trust Company (N.J.)++;
                              Director:
                                   The Dreyfus Consumer Credit Corporation*;
                                   Dreyfus Partnership Management, Inc.*;
                                   Seven Six Seven Agency, Inc.*

JOSEPH S. DiMARTINO           Director and Chairman of the Board:
President  and                     The Dreyfus Trust Company++;
Director                      Director and President:
                                   Dreyfus Acquisition Corporation*;
                                   The Dreyfus Consumer Credit Corporation*;
                                   Dreyfus Partnership Management, Inc.*;
                                   The Dreyfus Trust Company (N.J.)++;
                              Director and Executive Vice President:
                                   Dreyfus Service Corporation*;
                              Director and Vice President:
                                   Dreyfus Service Organization, Inc.*;
 JOSEPH S. DiMARTINO           Director:
(cont'd)                           Dreyfus Management, Inc.*;
                                   Dreyfus Personal Management, Inc.*;
                                   Noel Group, Inc.
                                   667 Madison Avenue
                                   New York, New York 10021;
                              Trustee:
                                   Bucknell University
                                   Lewisburg, Pennsylvania 17837;
                              Vice President and former Treasurer and
                              Director:
                                   National Muscular Dystrophy Association
                                   810 Seventh Avenue
                                   New York, New York 10019;
                              President, Chief Operating Officer and
                              Director:
                                   Major Trading Corporation*

W. KEITH SMITH                Chairman and Chief Executive Officer:
Chief Operating Officer            The Boston Company
and Director                       One Boston Place
                                   Boston, Massachusetts 02108
                              Vice Chairman of the Board:
                                   Mellon Bank Corporation
                                   One Mellon Bank Center
                                   Pittsburgh, Pennsylvania 15258;
                                   Mellon Bank, N.A.
                                   One Mellon Bank Center
                                   Pittsburgh, Pennsylvania 15258
                              Director:
                                   Dentsply International, Inc.
                                   570 West College Avenue
                                   York, Pennsylvania 17405

PAUL H. SNYDER                Director:
Vice President and Chief           Pennsylvania Economy League
Financial Officer                  Philadelphia, Pennsylvania;
                                   Children's Crisis Treatment Center
                                   Philadelphia, Pennsylvania;
                              Director and Vice President:
                                   Financial Executives Institute,
                                   Philadelphia Chapter
                                   Philadelphia, Pennsylvania;

LAWRENCE S. KASH              Chairman, President and Chief
Vice Chairman, Distribution   Executive Officer:
                                   The Boston Company Advisors, Inc.
                                   53 State Street
                                   Exchange Place
                                   Boston, Massachusetts 02109
                              President:
                                   The Boston Company
                                   One Boston Place
                                   Boston, Massachusetts  02108;
                                   Laurel Capital Advisors
                                   One Mellon Bank Center
                                   Pittsburgh, Pennsylvania 15258;
                                   Boston Group Holdings, Inc.
LAWRENCE S. KASH              Executive Vice President
(cont'd)                           Mellon Bank, N.A.
                                   One Mellon Bank Center
                                   Pittsburgh, Pennsylvania 15258;
                                   Boston Safe Deposit & Trust
                                   One Boston Place
                                   Boston, Massachusetts 02108

JAY R. DEMARTINE              Chairman of the Board and President:
Vice President, Marketing          The Woodbury Society
                                   16 Woodbury Lane
                                   Ogunquit, ME 03907;
                              Former Managing Director:
                                   Bankers Trust Company
                                   280 Park Avenue
                                   New York, NY  10017;

BARBARA E. CASEY              President:
Vice President,                    Dreyfus Retirement Services;
Retirement Services           Executive Vice President:
                                   Boston Safe Deposit & Trust Co.
                                   One Boston Place
                                   Boston, Massachusetts  02108;

DIANE M. COFFEY               None
Vice President,
Corporate Communications

LAWRENCE M. GREENE            Chairman of the Board:
Legal Consultant and               The Dreyfus Security Savings
Director                           Bank, F.S.B.+;
                              Director and Executive Vice President:
                                   Dreyfus Service Corporation*;
                              Director and Vice President:
                                   Dreyfus Acquisition Corporation*;
                                   Dreyfus Service Organization, Inc.*;
                              Director:
                                   Dreyfus-Lincoln, Inc.*;
                                   Dreyfus Management, Inc.*;
                                   Dreyfus Precious Metals, Inc.*;
                                   Dreyfus Thrift & Commerce+++;
                                   The Dreyfus Trust Company (N.J.)++;
                                   Seven Six Seven Agency, Inc.*;

 ELIE M. GENADRY               President:
Vice President,                    Institutional Services Division of
Dreyfus
Wholesale                          Service Corporation*;
                                   Broker-Dealer Division of Dreyfus Service
                                   Corporation*;
                                   Group Retirement Plans Division of
Dreyfus
                                   Service Corporation;
                              Executive Vice President:
                                   Dreyfus Service Corporation*;
                                   Dreyfus Service Organization, Inc.*;
                              Vice President:
                                   The Dreyfus Trust Company++;
                              Vice President-Sales:
                                   The Dreyfus Trust Company (N.J.)++;

DANIEL C. MACLEAN             Director, Vice President and Secretary:
Vice President and General         Dreyfus Precious Metals, Inc.*;
Counsel                       Director and Vice President:
                                   The Dreyfus Consumer Credit Corporation*;
                                   The Dreyfus Trust Company (N.J.)++;
                              Director and Secretary:
                                   Dreyfus Partnership Management, Inc.*;
                                   Major Trading Corporation*;
                                   The Truepenny Corporation+;
                              Director:
                                   The Dreyfus Trust Company++;
                              Secretary:
                                   Seven Six Seven Agency, Inc.*;

JEFFREY N. NACHMAN            None
Vice President, Fund
Administration

PHILIP L. TOIA                Chairman of the Board and Vice President:
Vice Chairman, Operations     Dreyfus Thrift & Commerce****;
and Administration            Director:
                                   The Dreyfus Security Savings Bank
F.S.B.+;
                                   Senior Loan Officer and Director:
                                   The Dreyfus Trust Company++;
                              Vice President:
                                   The Dreyfus Consumer Credit Corporation*;
                              President and Director:
                                   Dreyfus Personal Management, Inc.*;
                              Director:
                                   Dreyfus Realty Advisors, Inc.+++;
                              Formerly, Senior Vice President:
                                   The Chase Manhattan Bank, N.A. and
                                   The Chase Manhattan Capital Markets
                                   Corporation
                                   One Chase Manhattan Plaza
                                   New York, New York 10081

KATHERINE C. WICKHAM          Formerly, Assistant Commissioner:
Vice President,               Department of Parks and Recreation of the
Human Resources                    City of New York
                                   830 Fifth Avenue
                                   New York, New York 10022

MAURICE BENDRIHEM             Treasurer:
Controller                         Dreyfus Partnership Management, Inc.*;
                                   Dreyfus Service Organization, Inc.*;
                                   Seven Six Seven Agency, Inc.*;
                                   The Truepenny Corporation*;
                              Controller:
                                   Dreyfus Acquisition Corporation*;
                                   The Dreyfus Trust Company++;
                                   The Dreyfus Trust Company (N.J.)++;
                                   The Dreyfus Consumer Credit Corporation*;
                              Assistant Treasurer:
                                   Dreyfus Precious Metals*
                              Formerly, Vice President-Financial Planning,
                              Administration and Tax:
                                   Showtime/The Movie Channel, Inc.
                                   1633 Broadway
                                   New York, New York 10019

MARK N. JACOBS                Secretary:
Vice President, Fund               The Dreyfus Consumer Credit Corporation*;
Legal and Compliance                    Dreyfus Management, Inc.*;
and Secretary                 Assistant Secretary:
                                   Dreyfus Service Organization, Inc.*;
                                   Major Trading Corporation*;
                                   The Truepenny Corporation*

CHRISTINE PAVALOS             Assistant Secretary:
Assistant Secretary                Dreyfus Management, Inc.*;
                                   Dreyfus Service Corporation*;
                                   The Truepenny Corporation*
______________________________________

*       The address of the business so indicated is 200 Park Avenue, New
        York, New York 10166.
**      The address of the business so indicated is 80 Cutter Mill Road,
        Great Neck, New York 11021.
***     The address of the business so indicated is 45 Broadway, New York,
        New York 10006.
****    The address of the business so indicated is Five Triad Center, Salt
        Lake City, Utah 84180.
+       The address of the business so indicated is Atrium Building, 80
        Route 4 East, Paramus, New Jersey 07652.
++      The address of the business so indicated is 144 Glenn Curtiss
        Boulevard, Uniondale, New York 11556-0144.
+++     The address of the business so indicated is One Rockefeller Plaza,
        New York, New York 10020.
++++    The address of the business so indicated is 2 Boulevard Royal,
        Luxembourg.
+++++   The address of the business so indicated is Nassau, Bahama Islands.

Item 29.  Principal Underwriters
________  ______________________

     (a)  Other investment companies for which Registrant's principal
underwriter (exclusive distributor) acts as principal underwriter or
exclusive distributor:

           1)  Comstock Partners Strategy Fund, Inc.
           2)  Dreyfus A Bonds Plus, Inc.
           3)  Dreyfus Appreciation Fund, Inc.
           4)  Dreyfus Asset Allocation Fund, Inc.
           5)  Dreyfus Balanced Fund, Inc.
           6)  Dreyfus BASIC Money Market Fund, Inc.
           7)  Dreyfus BASIC Municipal Fund
           8)  Dreyfus BASIC U.S. Government Money Market Fund
           9)  Dreyfus California Intermediate Municipal Bond Fund
          10)  Dreyfus California Tax Exempt Bond Fund, Inc.
          11)  Dreyfus California Tax Exempt Money Market Fund
          12)  Dreyfus Capital Value Fund, Inc.
          13)  Dreyfus Cash Management
          14)  Dreyfus Cash Management Plus, Inc.
          15)  Dreyfus Connecticut Intermediate Municipal Bond Fund
          16)  Dreyfus Connecticut Municipal Money Market Fund, Inc.
          17)  The Dreyfus Convertible Securities Fund, Inc.
          18)  Dreyfus Edison Electric Index Fund, Inc.
          19)  Dreyfus Florida Intermediate Municipal Bond Fund
          20)  Dreyfus Florida Municipal Money Market Fund
          21)  Dreyfus Focus Funds, Inc.
          22)  The Dreyfus Fund Incorporated
          23)  Dreyfus Global Bond Fund, Inc.
          24)  Dreyfus Global Growth, L.P. (A Strategic Fund)
          25)  Dreyfus Global Investing, Inc.
          26)  Dreyfus GNMA Fund, Inc.
          27)  Dreyfus Government Cash Management
          28)  Dreyfus Growth and Income Fund, Inc.
          29)  Dreyfus Growth Opportunity Fund, Inc.
          30)  Dreyfus Institutional Money Market Fund
          31)  Dreyfus Institutional Short Term Treasury Fund
          32)  Dreyfus Insured Municipal Bond Fund, Inc.
          33)  Dreyfus Intermediate Municipal Bond Fund, Inc.
          34)  Dreyfus International Equity Fund, Inc.
          35)  Dreyfus Investors GNMA Fund
          36)  The Dreyfus Leverage Fund, Inc.
          37)  Dreyfus Life and Annuity Index Fund, Inc.
          38)  Dreyfus Liquid Assets, Inc.
          39)  Dreyfus Massachusetts Intermediate Municipal Bond Fund
          40)  Dreyfus Massachusetts Municipal Money Market Fund
          41)  Dreyfus Massachusetts Tax Exempt Bond Fund
          42)  Dreyfus Michigan Municipal Money Market Fund, Inc.
          43)  Dreyfus Money Market Instruments, Inc.
          44)  Dreyfus Municipal Bond Fund, Inc.
          45)  Dreyfus Municipal Cash Management Plus
          46)  Dreyfus Municipal Money Market Fund, Inc.
          47)  Dreyfus New Jersey Intermediate Municipal Bond Fund
          48)  Dreyfus New Jersey Municipal Bond Fund, Inc.
          49)  Dreyfus New Jersey Municipal Money Market Fund, Inc.
          50)  Dreyfus New Leaders Fund, Inc.
          51)  Dreyfus New York Insured Tax Exempt Bond Fund
          52)  Dreyfus New York Municipal Cash Management
          53)  Dreyfus New York Tax Exempt Bond Fund, Inc.
          54)  Dreyfus New York Tax Exempt Intermediate Bond Fund
          55)  Dreyfus New York Tax Exempt Money Market Fund
          56)  Dreyfus Ohio Municipal Money Market Fund, Inc.
          57)  Dreyfus 100% U.S. Treasury Intermediate Term Fund
          58)  Dreyfus 100% U.S. Treasury Long Term Fund
          59)  Dreyfus 100% U.S. Treasury Money Market Fund
          60)  Dreyfus 100% U.S. Treasury Short Term Fund
          61)  Dreyfus Pennsylvania Intermediate Municipal Bond Fund
          62)  Dreyfus Pennsylvania Municipal Money Market Fund
          63)  Dreyfus Short-Intermediate Government Fund
          64)  Dreyfus Short-Intermediate Municipal Bond Fund
          65)  Dreyfus Short-Term Income Fund, Inc.
          66)  The Dreyfus Socially Responsible Growth Fund, Inc.
          67)  Dreyfus Strategic Growth, L.P.
          68)  Dreyfus Strategic Income
          69)  Dreyfus Strategic Investing
          70)  Dreyfus Tax Exempt Cash Management
          71)  Dreyfus Treasury Cash Management
          72)  Dreyfus Treasury Prime Cash Management
          73)  Dreyfus Variable Investment Fund
          74)  Dreyfus-Wilshire Target Funds, Inc.
          75)  Dreyfus Worldwide Dollar Money Market Fund, Inc.
          76)  First Prairie Cash Management
          77)  First Prairie Diversified Asset Fund
          78)  First Prairie Money Market Fund
          79)  First Prairie Municipal Money Market Fund
          80)  First Prairie Tax Exempt Bond Fund, Inc.
          81)  First Prairie U.S. Government Income Fund
          82)  First Prairie U.S. Treasury Securities Cash Management
          83)  General California Municipal Bond Fund, Inc.
          84)  General California Municipal Money Market Fund
          85)  General Government Securities Money Market Fund, Inc.
          86)  General Money Market Fund, Inc.
          87)  General Municipal Bond Fund, Inc.
          88)  General Municipal Money Market Fund, Inc.
          89)  General New York Municipal Bond Fund, Inc.
          90)  General New York Municipal Money Market Fund
          91)  Pacific American Fund
          92)  Peoples Index Fund, Inc.
          93)  Peoples S&P MidCap Index Fund, Inc.
          94)  Premier Insured Municipal Bond Fund
          95)  Premier California Municipal Bond Fund
          96)  Premier GNMA Fund
          97)  Premier Growth Fund, Inc.
          98)  Premier Municipal Bond Fund
          99)  Premier New York Municipal Bond Fund
          100) Premier State Municipal Bond Fund

(b)
                                                             Positions and
Name and principal        Positions and offices with         offices with
business address          the Distributor                    Registrant
__________________        ___________________________        _____________

Marie E. Connolly         Director, President and Chief      President and
                          Operating Officer                  Treasurer

Joseph F. Tower, III      Senior Vice President and Chief    Assistant
                          Financial Officer                  Treasurer

John E. Pelletier         Senior Vice President and General  Vice President
                          Counsel                            and Secretary

Frederick C. Dey          Senior Vice President              Vice President
                                                             and Assistant
                                                             Treasurer

Eric B. Fischman          Vice President and Associate       Vice President
                          General Counsel                    and Assistant
                                                             Secretary

John J. Pyburn            Vice President                     Assistant
                                                             Treasurer

Jean M. O'Leary           Assistant Secretary                None

Ruth D. Leibert           Assistant Vice President           Assistant
                                                             Secretary

Paul D. Furcinito         Assistant Vice President           Assistant
                                                             Secretary

John W. Gomez             Director                           None

William J. Nutt           Director                           None
 Item 30.   Location of Accounts and Records
           ________________________________

           1.  The Shareholder Services Group, Inc.,
               a subsidiary of First Data Corporation
               P.O. Box 9671
               Providence, Rhode Island 02940-9671

           2.  The Bank of New York
               110 Washington Street
               New York, New York 10286

           3.  The Dreyfus Corporation
               200 Park Avenue
               New York, New York 10166

Item 31.   Management Services
_______    ___________________

           Not Applicable

Item 32.   Undertakings
________   ____________

  (1)      To call a meeting of shareholders for the purpose of voting upon
the question of removal of a director or directors when requested in writing
to do so by the holders of at least 10% of the Registrant's outstanding
shares of common stock and in connection with such meeting to comply with
the provisions of Section 16(c) of the Investment Company Act of 1940
relating to shareholder communications.

  (2)      To furnish each person to whom a prospectus is delivered with a
copy of the Fund's latest Annual Report to Shareholders, upon request and
without charge.

                                  SIGNATURES


     Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant has duly caused this
Amendment to the Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of New York, and State
of New York on the 28th day of Nomvember, 1994.

                    DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND

               BY:  /s/Marie E. Connolly*
                    ___________________________
                    Marie E. Connolly, PRESIDENT

     Pursuant to the requirements of the Securities Act of 1933 and the
 Investment Company Act of 1940, this Amendment to the Registration
Statement has been signed below by the following persons in the capacities
and on the date indicated.

         Signatures                        Title                      Date

___________________________     ______________________________   ___________

/s/Marie E. Connolly*          President and Treasurer             11/28/94
____________________________   (Principal Executive and
Marie E. Connolly              Financial Officer)

/s/Lucy Wilson Benson*         Trustee                             11/28/94
____________________________
Lucy Wilson Benson

/s/David W. Burke*             Trustee                             11/28/94
____________________________
David W. Burke

/s/Martin D. Fife*             Trustee                             11/28/94
____________________________
Martin D. Fife

/s/Robert R. Glauber*          Trustee                             11/28/94
____________________________
Robert R. Glauber

/s/Whitney I. Gerard*          Trustee                             11/28/94
____________________________
Whitney I. Gerard

/s/Arthur A. Hartman*          Trustee                             11/28/94
____________________________
Arthur A. Hartman

 /s/George C. Perry*            Trustee                             11/28/94
____________________________
George C. Perry

/s/Paul D. Wolfowitz*          Trustee                             11/28/94
____________________________
Paul D. Wolfowitz

*BY: /s/Marie E. Connolly*
     __________________________
     Marie E. Connolly,
     Attorney-in-Fact





                                                                Other Exhibit




                               POWER OF ATTORNEY


     The undersigned hereby constitutes and appoints Frederick C. Dey, Eric
B. Fischman, Ruth D. Leibert and John Pelletier, and each of them, with full
power to act without the other, his or her true and lawful attorney-in-fact
and agent, with full power of substitution and resubstitution, for him or
her and in his or her name, place and stead, in any and all capacities
(until revoked in writing) to sign any and all amendments to the
Registration Statement of Dreyfus Institutional Short Term Treasury Fund
(including post-effective amendments and amendments thereto), and to file
the same, with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing ratifying and confirming all
that said attorneys-in-fact and agents or any of them, or their or his or
her substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.



                                                  September 23, 1994
                                                  ------------------
                                                   Date



/S/ Marie E. Connolly
- ---------------------
Marie E.Connolly





                                                                Other Exhibit




                               POWER OF ATTORNEY


     The undersigned hereby constitute and appoint Frederick C. Dey, Eric B.
Fischman, Ruth D. Leibert and John Pelletier, and each of them, with full
power to act without the other, his or her true and lawful attorney-in-fact
and agent, with full power of substitution and resubstitution, for him or
her and in his or her name, place and stead, in any and all capacities
(until revoked in writing) to sign any and all amendments to the
Registration Statement of Dreyfus Institutional Short Term Treasury Fund
(including post-effective amendments and amendments thereto), and to file
the same, with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing ratifying and confirming all
that said attorneys-in-fact and agents or any of them, or their or his or
her substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.



                                                  August 25, 1994
                                                  ---------------
                                                  Director Date



/S/ Lucy Wilson Benson              /s/ Robert R. Glauber
- ----------------------              ---------------------
Lucy Wilson Benson                  Robert Glauber

/s/ David W. Burke                  /s/ Arthur A. Hartman
- ------------------                  ---------------------
David W. Burke                      Arthur A. Hartman

/s/ Martin W. Fife                  /s/ George L. Perry
- ------------------                  -------------------
Martin W. Fife                      George L. Perry

/s/ Whitney I. Gerard               /s/ Paul Wolfowitz
- ---------------------               ------------------
Whitney I. Gerard                   Paul Wolfowitz


                      MANAGEMENT AGREEMENT

         DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND




                                        August 24, 1994



The Dreyfus Corporation
200 Park Avenue
New York, New York  10166

Dear Sirs:

          The above-named investment company (the "Fund")
herewith confirms its agreement with you as follows:

          The Fund desires to employ its capital by investing and
reinvesting the same in investments of the type and in accordance
with the limitations specified in its charter documents and in
its Prospectus and Statement of Additional Information as from
time to time in effect, copies of which have been or will be
submitted to you, and in such manner and to such extent as from
time to time may be approved by the Fund's Board.  The Fund
desires to employ you to act as its investment adviser.

          In this connection it is understood that from time to
time you will employ or associate with yourself such person or
persons as you may believe to be particularly fitted to assist
you in the performance of this Agreement.  Such person or persons
may be officers or employees who are employed by both you and the
Fund.  The compensation of such person or persons shall be paid
by you and no obligation may be incurred on the Fund's behalf in
any such respect.

          Subject to the supervision and approval of the Fund's
Board, you will provide investment management of the Fund's
portfolio in accordance with the Fund's investment objectives and
policies as stated in its Prospectus and Statement of Additional
Information as from time to time in effect.  In connection
therewith, you will obtain and provide investment research and
will supervise the Fund's investments and conduct a continuous
program of investment, evaluation and, if appropriate, sale and
reinvestment of the Fund's assets.  You will furnish to the Fund
such statistical information, with respect to the investments
which the Fund may hold or contemplate purchasing, as the Fund
may reasonably request.  The Fund wishes to be informed of
important developments materially affecting its portfolio and
shall expect you, on your own initiative, to furnish to the Fund
from time to time such information as you may believe appropriate
for this purpose.

          In addition, you will supply office facilities (which
may be in your own offices), data processing services, clerical,
accounting and bookkeeping services, internal auditing and legal
services, internal executive and administrative services, and
stationery and office supplies; prepare reports to the Fund's
stockholders, tax returns, reports to and filings with the
Securities and Exchange Commission and state Blue Sky
authorities; calculate the net asset value of the Fund's shares;
and generally assist in all aspects of the Fund's operations.
You shall have the right, at your expense, to engage other
entities to assist you in performing some or all of the
obligations set forth in this paragraph, provided each such
entity enters into an agreement with you in form and substance
reasonably satisfactory to the Fund.  You agree to be liable for
the acts or omissions of each such entity to the same extent as
if you had acted or failed to act under the circumstances.

          You shall exercise your best judgment in rendering the
services to be provided to the Fund hereunder and the Fund agrees
as an inducement to your undertaking the same that you shall not
be liable hereunder for any error of judgment or mistake of law
or for any loss suffered by the Fund, provided that nothing
herein shall be deemed to protect or purport to protect you
against any liability to the Fund or to its security holders to
which you would otherwise be subject by reason of willful
misfeasance, bad faith or gross negligence in the performance of
your duties hereunder, or by reason of your reckless disregard of
your obligations and duties hereunder.

          In consideration of services rendered pursuant to this
Agreement, the Fund will pay you on the first business day of
each month a fee at the annual rate of .20 of 1% of the value of
the Fund's average daily net assets.  Net asset value shall be
computed on such days and at such time or times as described in
the Fund's then-current Prospectus and Statement of Additional
Information.  Upon any termination of this Agreement before the
end of any month, the fee for such part of a month shall be pro-
rated according to the proportion which such period bears to the
full monthly period and shall be payable upon the date of
termination of this Agreement.

          For the purpose of determining fees payable to you, the
value of the Fund's net assets shall be computed in the manner
specified in the Fund's charter documents for the computation of
the value of the Fund's net assets.

          You will bear all expenses in connection with the
performance of your services under this Agreement.  All other
expenses to be incurred in the operation of the Fund will be
borne by the Fund, except to the extent specifically assumed by
you.  The expenses to be borne by the Fund include, without
limitation, the following:  organizational costs, taxes,
interest, loan commitment fees, interest and distributions paid
on securities sold short, brokerage fees and commissions, if any,
fees of Board members who are not your officers, directors or
employees or holders of 5% or more of your outstanding voting
securities, Securities and Exchange Commission fees and state
Blue Sky qualification fees, advisory fees, charges of
custodians, transfer and dividend disbursing agents' fees,
certain insurance premiums, industry association fees, outside
auditing and legal expenses, costs of independent pricing
services, costs of maintaining the Fund's existence, costs
attributable to investor services (including, without limitation,
telephone and personnel expenses), costs of preparing and
printing prospectuses and statements of additional information
for regulatory purposes and for distribution to existing
stockholders, costs of stockholders' reports and meetings, and
any extraordinary expenses.

          If in any fiscal year the aggregate expenses of the
Fund (including fees pursuant to this Agreement, but excluding
interest, taxes, brokerage and, with the prior written consent of
the necessary state securities commissions, extraordinary
expenses) exceed the expense limitation of any state having
jurisdiction over the Fund, the Fund may deduct from the fees to
be paid hereunder, or you will bear, such excess expense to the
extent required by state law.  Your obligation pursuant hereto
will be limited to the amount of your fees hereunder.  Such
deduction or payment, if any, will be estimated daily, and
reconciled and effected or paid, as the case may be, on a monthly
basis.

          The Fund understands that you now act, and that from
time to time hereafter you may act, as investment adviser to one
or more other investment companies and fiduciary or other managed
accounts, and the Fund has no objection to your so acting,
provided that when the purchase or sale of securities of the same
issuer is suitable for the investment objectives of two or more
companies or accounts managed by you which have available funds
for investment, the available securities will be allocated in a
manner believed by you to be equitable to each company or
account.  It is recognized that in some cases this procedure may
adversely affect the price paid or received by the Fund or the
size of the position obtainable for or disposed of by the Fund.

          In addition, it is understood that the persons employed
by you to assist in the performance of your duties hereunder will
not devote their full time to such service and nothing contained
herein shall be deemed to limit or restrict your right or the
right of any of your affiliates to engage in and devote time and
attention to other businesses or to render services of whatever
kind or nature.

          You shall not be liable for any error of judgment or
mistake of law or for any loss suffered by the Fund in connection
with the matters to which this Agreement relates, except for a
loss resulting from willful misfeasance, bad faith or gross
negligence on your part in the performance of your duties or from
reckless disregard by you of your obligations and duties under
this Agreement.  Any person, even though also your officer,
director, partner, employee or agent, who may be or become an
officer, Board member, employee or agent of the Fund, shall be
deemed, when rendering services to the Fund or acting on any
business of the Fund, to be rendering such services to or acting
solely for the Fund and not as your officer, director, partner,
employee or agent or one under your control or direction even
though paid by you.

          This Agreement shall continue until February 28, 1995,
and thereafter shall continue automatically for successive annual
periods ending on February 28th of each year, provided such
continuance is specifically approved at least annually by (i) the
Fund's Board or (ii) vote of a majority (as defined in the
Investment Company Act of 1940) of the Fund's outstanding voting
securities, provided that in either event its continuance also is
approved by a majority of the Fund's Board members who are not
"interested persons" (as defined in said Act) of any party to
this Agreement, by vote cast in person at a meeting called for
the purpose of voting on such approval.  This Agreement is
terminable without penalty, on 60 days' notice, by the Fund's
Board or by vote of holders of a majority of the Fund's shares
or, upon not less than 90 days' notice, by you.  This Agreement
also will terminate automatically in the event of its assignment
(as defined in said Act).

          The Fund recognizes that from time to time your
directors, officers and employees may serve as directors,
trustees, partners, officers and employees of other corporations,
business trusts, partnerships or other entities (including other
investment companies) and that such other entities may include
the name "Dreyfus" as part of their name, and that your
corporation or its affiliates may enter into investment advisory
or other agreements with such other entities.  If you cease to
act as the Fund's investment adviser, the Fund agrees that, at
your request, the Fund will take all necessary action to change
the name of the Fund to a name not including "Dreyfus" in any
form or combination of words.

          This Agreement has been executed on behalf of the Fund
by the undersigned officer of the Fund in his capacity as an
officer of the Fund.  The obligations of this Agreement shall
only be binding upon the assets and property of the Fund and
shall not be binding upon any Board member, officer or
shareholder of the Fund individually.

          If the foregoing is in accordance with your
understanding, will you kindly so indicate by signing and
returning to us the enclosed copy hereof.

                                   Very truly yours,

                                   DREYFUS INSTITUTIONAL SHORT
                                     TERM TREASURY FUND



                                   By:___________________________


Accepted:

THE DREYFUS CORPORATION


By:_______________________________


         DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND

                    SHAREHOLDER SERVICES PLAN


          Introduction:  It has been proposed that the above-
captioned investment company (the "Fund") adopt a Shareholder
Services Plan (the "Plan") under which the Fund would reimburse
Dreyfus Service Corporation ("DSC") for certain allocated
expenses of providing personal services and/or maintaining
shareholder accounts to (a) shareholders of each series of the
Fund or class of Fund shares set forth on Exhibit A hereto, as
such Exhibit may be revised from time to time, or (b) if no
series or classes are set forth on such Exhibit, shareholders of
the Fund.  The Plan is not to be adopted pursuant to Rule 12b-1
under the Investment Company Act of 1940, as amended (the "Act"),
and the fee under the Plan is intended to be a "service fee" as
defined in Article III, Section 26 (a "Service Fee"), of the NASD
Rules of Fair Practice (the "NASD Rules").
          The Fund's Board, in considering whether the Fund
should implement a written plan, has requested and evaluated such
information as it deemed necessary to an informed determination
as to whether a written plan should be implemented and has
considered such pertinent factors as it deemed necessary to form
the basis for a decision to use Fund assets for such purposes.
          In voting to approve the implementation of such a plan,
the Board has concluded, in the exercise of its reasonable
business judgment and in light of applicable fiduciary duties,
that there is a reasonable likelihood that the plan set forth
below will benefit the Fund and its shareholders.
          The Plan:  The material aspects of this Plan are as
follows:
          1.   The Fund shall reimburse DSC an amount not to
exceed an annual rate of .25 of 1% of the value of the Fund's
average daily net assets for its allocated expenses of providing
personal services to shareholders and/or maintaining shareholder
accounts; provided that, at no time, shall the amount paid to DSC
under this Plan, together with amounts otherwise paid by the
Fund, or each series or class identified on Exhibit A, as a
Service Fee under the NASD Rules, exceed the maximum amount then
payable under the NASD Rules as a Service Fee.  The amount of
such reimbursement shall be based on an expense allocation
methodology prepared by DSC annually and approved by the Fund's
Board or on any other basis from time to time deemed reasonable
by the Fund's Board.
          2.   For the purposes of determining the fees payable
under this Plan, the value of the net assets of the Fund or the
net assets attributable to each series or class of Fund shares
identified on Exhibit A, shall be computed in the manner
specified in the Fund's charter documents for the computation of
the value of the Fund's net assets.
          3.   The Board shall be provided, at least quarterly,
with a written report of all amounts expended pursuant to this
Plan.  The report shall state the purpose for which the amounts
were expended.
          4.   This Plan will become effective immediately upon
approval by a majority of the Board members, including a majority
of the Board members who are not "interested persons" (as defined
in the Act) of the Fund and have no direct or indirect financial
interest in the operation of this Plan or in any agreements
entered into in connection with this Plan, pursuant to a vote
cast in person at a meeting called for the purpose of voting on
the approval of this Plan.
          5.   This Plan shall continue for a period of one year
from its effective date, unless earlier terminated in accordance
with its terms, and thereafter shall continue automatically for
successive annual periods, provided such continuance is approved
at least annually in the manner provided in paragraph 4 hereof.
          6.   This Plan may be amended at any time by the Board,
provided that any material amendments of the terms of this Plan
shall become effective only upon approval as provided in
paragraph 4 hereof.
          7.   This Plan is terminable without penalty at any
time by vote of a majority of the Board members who are not
"interested persons" (as defined in the Act) of the Fund and have
no direct or indirect financial interest in the operation of this
Plan or in any agreements entered into in connection with this
Plan.
           8.   The obligations hereunder and under any related
Plan agreement shall only be binding upon the assets and property
of the Fund and shall not be binding upon any Trustee, officer or
shareholder of the Fund individually.




Dated:         October 7, 1993
As Revised:    August 25, 1994
                             EXHIBIT A



                                Name of Class


     The Plan and the payments to be made under the Plan pertain only to the
Fund's Class A shares.


 








                    CONSENT OF INDEPENDENT AUDITORS



We consent to the reference to our firm under the caption "Custodian, Transfer
and Dividend Disbursing Agent, Counsel and Independent Auditors" and to the use
of our report dated November 1, 1994, in this Registration Statement (Form N-1A
33-50379) of Dreyfus Institutional Short Term Treasury Fund.


                                       ERNST & YOUNG LLP


New York, New York
November 28, 1994
 





         DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND

                          SERVICE PLAN


          Introduction:  It has been proposed that the above-
captioned investment company (the "Fund") adopt a Service Plan
(the "Plan") relating to its Class B shares in accordance with
Rule 12b-1, promulgated under the Investment Company Act of 1940,
as amended (the "Act").  Under the Plan, the Fund would (a)
reimburse the Fund's distributor (the "Distributor") for
distributing the Fund's Class B shares (the payments in this
clause (a) being referred to as "Distributor Payments") and
(b) pay The Dreyfus Corporation, Dreyfus Service Corporation and
any affiliate of either of them (collectively, "Dreyfus") for
advertising and marketing relating to the Fund's Class B shares
and for providing certain services relating to Class B
shareholder accounts, such as answering shareholder inquiries
regarding the Fund and providing reports and other information,
and services related to the maintenance of shareholder accounts
("Servicing") (the payments in this clause (b) being referred to
as "Dreyfus Payments").  If this proposal is to be implemented,
the Act and said Rule 12b-1 require that a written plan
describing all material aspects of the proposed financing be
adopted by the Fund.
          The Fund's Board, in considering whether the Fund
should implement a written plan, has requested and evaluated such
information as it deemed necessary to an informed determination
as to whether a written plan should be implemented and has
considered such pertinent factors as it deemed necessary to form
the basis for a decision to use assets attributable to the Fund's
Class B shares for such purposes.
          In voting to approve the implementation of such a plan,
the Board members have concluded, in the exercise of their
reasonable business judgment and in light of their respective
fiduciary duties, that there is a reasonable likelihood that the
plan set forth below will benefit the Fund and holders of its
Class B shares.
          The Plan:  The material aspects of this Plan are as
follows:
          1.   (a)  The aggregate annual fee the Fund may pay
under this Plan for Distributor Payments and Dreyfus Payments is
.25 of 1% of the value of the Fund's average daily net assets
attributable to Class B (the "Aggregate Amount").
               (b)  The Fund shall reimburse the Distributor in
respect of Distributor Payments an amount not to exceed an annual
rate of .25 of 1% of the value of the average daily net assets
attributable to Class B for such year (the "Distributor Amount").
               (c)  The Fund shall pay Dreyfus in respect of
Dreyfus Payments an annual fee equal to the difference between
the Aggregate Amount and the Distributor Amount for such year.
               (d)  Each of the Distributor and Dreyfus may pay
one or more securities dealers, financial institutions (which may
include banks) or other industry professionals, such as
investment advisers, accountants and estate planning firms
(severally, a "Service Agent"), a fee in respect of the Fund's
Class B shares owned by investors with whom the Service Agent has
a Servicing relationship or for whom the Service Agent is the
dealer or holder of record.  Each of the Distributor and Dreyfus
shall determine the amounts to be paid to the Service Agents to
which it will make payments under this Plan and the basis on
which such payments will be made.  Payments to a Service Agent
are subject to compliance by the Service Agent with the terms of
any related Plan agreement between the Service Agent and the
Distributor or Dreyfus, as the case may be.  The fee payable for
Servicing is intended to be a "service fee" as defined in Article
III, Section 26 of the NASD Rules of Fair Practice.
          2.   For the purposes of determining the fees payable
under this Plan, the value of the Fund's net assets attributable
to Class B shall be computed in the manner specified in the
Fund's charter documents as then in effect for the computation of
the value of the Fund's net assets attributable to such Class.
          3.   The Fund's Board shall be provided, at least
quarterly, with a written report of all amounts expended pursuant
to this Plan.  The report shall state the purpose for which the
amounts were expended.
          4.   This Plan will become effective upon the later to
occur of (i) the consummation of the transactions contemplated by
the Amended and Restated Agreement and Plan of Merger dated as of
December 5, 1993 by and among Mellon Bank Corporation, Mellon
Bank, N.A., XYZ Sub Corporation and The Dreyfus Corporation or
(ii) approval by (a) holders of a majority of the Fund's
outstanding Class B shares, and (b) a majority of the Board
members, including a majority of the Board members who are not
"interested persons" (as defined in the Act) of the Fund and have
no direct or indirect financial interest in the operation of this
Plan or in any agreements entered into in connection with this
Plan, pursuant to a vote cast in person at a meeting called for
the purpose of voting on the approval of this Plan.
          5.   This Plan shall continue for a period of one year
from its effective date, unless earlier terminated in accordance
with its terms, and thereafter shall continue automatically for
successive annual periods, provided such continuance is approved
at least annually in the manner provided in paragraph 4(b)
hereof.
          6.   This Plan may be amended at any time by the Fund's
Board, provided that (a) any amendment to increase materially the
costs which the Fund may bear pursuant to this Plan shall be
effective only upon approval by a vote of the holders of a
majority of the Fund's outstanding Class B shares, and (b) any
material amendments of the terms of this Plan shall become
effective only upon approval as provided in paragraph 4(b)
hereof.
          7.   This Plan is terminable without penalty at any
time by (a) vote of a majority of the Board members who are not
"interested persons" (as defined in the Act) of the Fund and have
no direct or indirect financial interest in the operation of this
Plan or in any agreements entered into in connection with this
Plan, or (b) vote of the holders of a majority of the Fund's
outstanding Class B shares.
          8.   The obligations hereunder and under any related
Plan agreement shall only be binding upon the assets and property
of the Fund and shall not be binding upon any Board member,
officer or shareholder of the Fund individually.

Dated:  May 23, 1994





                     DISTRIBUTION AGREEMENT


         DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
                   144 Glenn Curtiss Boulevard
                 Uniondale, New York  11556-0144



                                                 August 24, 1994



Premier Mutual Fund Services, Inc.
One Exchange Place
Tenth Floor
Boston, Massachusetts  02109


Dear Sirs:

         This is to confirm that, in consideration of the agree-
ments hereinafter contained, the above-named investment company
(the "Fund") has agreed that you shall be, for the period of
this agreement, the distributor of (a) shares of each Series of
the Fund set forth on Exhibit A hereto, as such Exhibit may be
revised from time to time (each, a "Series") or (b) if no Series
are set forth on such Exhibit, shares of the Fund.  For purposes
of this agreement the term "Shares" shall mean the authorized
shares of the relevant Series, if any, and otherwise shall mean
the Fund's authorized shares.

         1.  Services as Distributor

         1.1  You will act as agent for the distribution of
Shares covered by, and in accordance with, the registration
statement and prospectus then in effect under the Securities Act
of 1933, as amended, and will transmit promptly any orders
received by you for purchase or redemption of Shares to the
Transfer and Dividend Disbursing Agent for the Fund of which the
Fund has notified you in writing.

         1.2  You agree to use your best efforts to solicit
orders for the sale of Shares.  It is contemplated that you will
enter into sales or servicing agreements with securities
dealers, financial institutions and other industry
professionals, such as investment advisers, accountants and
estate planning firms, and in so doing you will act only on your
own behalf as principal.

         1.3  You shall act as distributor of Shares in
compliance with all applicable laws, rules and regulations,
including, without limitation, all rules and regulations made or
adopted pursuant to the Investment Company Act of 1940, as
amended, by the Securities and Exchange Commission or any
securities association registered under the Securities Exchange
Act of 1934, as amended.

         1.4  Whenever in their judgment such action is
warranted by market, economic or political conditions, or by
abnormal circumstances of any kind, the Fund's officers may
decline to accept any orders for, or make any sales of, any
Shares until such time as they deem it advisable to accept such
orders and to make such sales and the Fund shall advise you
promptly of such determination.

         1.5  The Fund agrees to pay all costs and expenses in
connection with the registration of Shares under the Securities
Act of 1933, as amended, and all expenses in connection with
maintaining facilities for the issue and transfer of Shares and
for supplying information, prices and other data to be furnished
by the Fund hereunder, and all expenses in connection with the
preparation and printing of the Fund's prospectuses and
statements of additional information for regulatory purposes and
for distribution to shareholders; provided however, that nothing
contained herein shall be deemed to require the Fund to pay any
of the costs of advertising the sale of Shares.

         1.6  The Fund agrees to execute any and all documents
and to furnish any and all information and otherwise to take all
actions which may be reasonably necessary in the discretion of
the Fund's officers in connection with the qualification of
Shares for sale in such states as you may designate to the Fund
and the Fund may approve, and the Fund agrees to pay all
expenses which may be incurred in connection with such
qualification.  You shall pay all expenses connected with your
own qualification as a dealer under state or Federal laws and,
except as otherwise specifically provided in this agreement, all
other expenses incurred by you in connection with the sale of
Shares as contemplated in this agreement.

         1.7  The Fund shall furnish you from time to time, for
use in connection with the sale of Shares, such information with
respect to the Fund or any relevant Series and the Shares as you
may reasonably request, all of which shall be signed by one or
more of the Fund's duly authorized officers; and the Fund
warrants that the statements contained in any such information,
when so signed by the Fund's officers, shall be true and
correct.  The Fund also shall furnish you upon request with:
(a) semi-annual reports and annual audited reports of the Fund's
books and accounts made by independent public accountants
regularly retained by the Fund, (b) quarterly earnings
statements prepared by the Fund, (c) a monthly itemized list of
the securities in the Fund's or, if applicable, each Series'
portfolio, (d) monthly balance sheets as soon as practicable
after the end of each month, and (e) from time to time such
additional information regarding the Fund's financial condition
as you may reasonably request.

         1.8  The Fund represents to you that all registration
statements and prospectuses filed by the Fund with the Securi-
ties and Exchange Commission under the Securities Act of 1933,
as amended, and under the Investment Company Act of 1940, as
amended, with respect to the Shares have been carefully prepared
in conformity with the requirements of said Acts and rules and
regulations of the Securities and Exchange Commission there-
under.  As used in this agreement the terms "registration state-
ment" and "prospectus" shall mean any registration statement and
prospectus, including the statement of additional information
incorporated by reference therein, filed with the Securities and
Exchange Commission and any amendments and supplements thereto
which at any time shall have been filed with said Commission.
The Fund represents and warrants to you that any registration
statement and prospectus, when such registration statement
becomes effective, will contain all statements required to be
stated therein in conformity with said Acts and the rules and
regulations of said Commission; that all statements of fact
contained in any such registration statement and prospectus will
be true and correct when such registration statement becomes
effective; and that neither any registration statement nor any
prospectus when such registration statement becomes effective
will include an untrue statement of a material fact or omit to
state a material fact required to be stated therein or necessary
to make the statements therein not misleading.  The Fund may but
shall not be obligated to propose from time to time such amend-
ment or amendments to any registration statement and such
supplement or supplements to any prospectus as, in the light of
future developments, may, in the opinion of the Fund's counsel,
be necessary or advisable.  If the Fund shall not propose such
amendment or amendments and/or supplement or supplements within
fifteen days after receipt by the Fund of a written request from
you to do so, you may, at your option, terminate this agreement
or decline to make offers of the Fund's securities until such
amendments are made.  The Fund shall not file any amendment to
any registration statement or supplement to any prospectus
without giving you reasonable notice thereof in advance;
provided, however, that nothing contained in this agreement
shall in any way limit the Fund's right to file at any time such
amendments to any registration statement and/or supplements to
any prospectus, of whatever character, as the Fund may deem
advisable, such right being in all respects absolute and
unconditional.

         1.9  The Fund authorizes you to use any prospectus in
the form furnished to you from time to time, in connection with
the sale of Shares.  The Fund agrees to indemnify, defend and
hold you, your several officers and directors, and any person
who controls you within the meaning of Section 15 of the Securi-
ties Act of 1933, as amended, free and harmless from and against
any and all claims, demands, liabilities and expenses (including
the cost of investigating or defending such claims, demands or
liabilities and any counsel fees incurred in connection there-
with) which you, your officers and directors, or any such con-
trolling person, may incur under the Securities Act of 1933, as
amended, or under common law or otherwise, arising out of or
based upon any untrue statement, or alleged untrue statement, of
a material fact contained in any registration statement or any
prospectus or arising out of or based upon any omission, or
alleged omission, to state a material fact required to be stated
in either any registration statement or any prospectus or
necessary to make the statements in either thereof not
misleading; provided, however, that the Fund's agreement to
indemnify you, your officers or directors, and any such control-
ling person shall not be deemed to cover any claims, demands,
liabilities or expenses arising out of any untrue statement or
alleged untrue statement or omission or alleged omission made in
any registration statement or prospectus in reliance upon and in
conformity with written information furnished to the Fund by you
specifically for use in the preparation thereof.  The Fund's
agreement to indemnify you, your officers and directors, and any
such controlling person, as aforesaid, is expressly conditioned
upon the Fund's being notified of any action brought against
you, your officers or directors, or any such controlling person,
such notification to be given by letter or by telegram addressed
to the Fund at its address set forth above within ten days after
the summons or other first legal process shall have been served.
The failure so to notify the Fund of any such action shall not
relieve the Fund from any liability which the Fund may have to
the person against whom such action is brought by reason of any
such untrue, or alleged untrue, statement or omission, or
alleged omission, otherwise than on account of the Fund's
indemnity agreement contained in this paragraph 1.9.  The Fund
will be entitled to assume the defense of any suit brought to
enforce any such claim, demand or liability, but, in such case,
such defense shall be conducted by counsel of good standing
chosen by the Fund and approved by you.  In the event the Fund
elects to assume the defense of any such suit and retain counsel
of good standing approved by you, the defendant or defendants in
such suit shall bear the fees and expenses of any additional
counsel retained by any of them; but in case the Fund does not
elect to assume the defense of any such suit, or in case you do
not approve of counsel chosen by the Fund, the Fund will
reimburse you, your officers and directors, or the controlling
person or persons named as defendant or defendants in such suit,
for the fees and expenses of any counsel retained by you or
them.  The Fund's indemnification agreement contained in this
paragraph 1.9 and the Fund's representations and warranties in
this agreement shall remain operative and in full force and
effect regardless of any investigation made by or on behalf of
you, your officers and directors, or any controlling person, and
shall survive the delivery of any Shares.  This agreement of
indemnity will inure exclusively to your benefit, to the benefit
of your several officers and directors, and their respective
estates, and to the benefit of any controlling persons and their
successors.  The Fund agrees promptly to notify you of the
commencement of any litigation or proceedings against the Fund
or any of its officers or Board members in connection with the
issue and sale of Shares.

         1.10  You agree to indemnify, defend and hold the Fund,
its several officers and Board members, and any person who con-
trols the Fund within the meaning of Section 15 of the Securi-
ties Act of 1933, as amended, free and harmless from and against
any and all claims, demands, liabilities and expenses (including
the cost of investigating or defending such claims, demands or
liabilities and any counsel fees incurred in connection there-
with) which the Fund, its officers or Board members, or any such
controlling person, may incur under the Securities Act of 1933,
as amended, or under common law or otherwise, but only to the
extent that such liability or expense incurred by the Fund, its
officers or Board members, or such controlling person resulting
from such claims or demands, shall arise out of or be based upon
any untrue, or alleged untrue, statement of a material fact
contained in information furnished in writing by you to the Fund
specifically for use in the Fund's registration statement and
used in the answers to any of the items of the registration
statement or in the corresponding statements made in the pro-
spectus, or shall arise out of or be based upon any omission, or
alleged omission, to state a material fact in connection with
such information furnished in writing by you to the Fund and
required to be stated in such answers or necessary to make such
information not misleading.  Your agreement to indemnify the
Fund, its officers and Board members, and any such controlling
person, as aforesaid, is expressly conditioned upon your being
notified of any action brought against the Fund, its officers or
Board members, or any such controlling person, such notification
to be given by letter or telegram addressed to you at your
address set forth above within ten days after the summons or
other first legal process shall have been served.  You shall
have the right to control the defense of such action, with
counsel of your own choosing, satisfactory to the Fund, if such
action is based solely upon such alleged misstatement or
omission on your part, and in any other event the Fund, its
officers or Board members, or such controlling person shall each
have the right to participate in the defense or preparation of
the defense of any such action.  The failure so to notify you of
any such action shall not relieve you from any liability which
you may have to the Fund, its officers or Board members, or to
such controlling person by reason of any such untrue, or alleged
untrue, statement or omission, or alleged omission, otherwise
than on account of your indemnity agreement contained in this
paragraph 1.10.  This agreement of indemnity will inure
exclusively to the Fund's benefit, to the benefit of the Fund's
officers and Board members, and their respective estates, and to
the benefit of any controlling persons and their successors.

You agree promptly to notify the Fund of the commencement of any
litigation or proceedings against you or any of your officers or
directors in connection with the issue and sale of Shares.

         1.11  No Shares shall be offered by either you or the
Fund under any of the provisions of this agreement and no orders
for the purchase or sale of such Shares hereunder shall be
accepted by the Fund if and so long as the effectiveness of the
registration statement then in effect or any necessary amend-
ments thereto shall be suspended under any of the provisions of
the Securities Act of 1933, as amended, or if and so long as a
current prospectus as required by Section 10 of said Act, as
amended, is not on file with the Securities and Exchange
Commission; provided, however, that nothing contained in this
paragraph 1.11 shall in any way restrict or have an application
to or bearing upon the Fund's obligation to repurchase any
Shares from any shareholder in accordance with the provisions of
the Fund's prospectus or charter documents.

         1.12  The Fund agrees to advise you immediately in
writing:

            (a)  of any request by the Securities and Exchange
         Commission for amendments to the registration statement
         or prospectus then in effect or for additional
         information;

             (b)  in the event of the issuance by the Securities
         and Exchange Commission of any stop order suspending
         the effectiveness of the registration statement or pro-
         spectus then in effect or the initiation of any
         proceeding for that purpose;

             (c)  of the happening of any event which makes
         untrue any statement of a material fact made in the
         registration statement or prospectus then in effect or
         which requires the making of a change in such registra-
         tion statement or prospectus in order to make the
         statements therein not misleading; and

             (d)  of all actions of the Securities and
         Exchange Commission with respect to any amendments to
         any registration statement or prospectus which may from
         time to time be filed with the Securities and Exchange
         Commission.

          2.  Offering Price

         Shares of any class of the Fund offered for sale by you
shall be offered for sale at a price per share (the "offering
price") approximately equal to (a) their net asset value
(determined in the manner set forth in the Fund's charter
documents) plus (b) a sales charge, if any and except to those
persons set forth in the then-current prospectus, which shall be
the percentage of the offering price of such Shares as set forth
in the Fund's then-current prospectus.  The offering price, if
not an exact multiple of one cent, shall be adjusted to the
nearest cent.  In addition, Shares of any class of the Fund
offered for sale by you may be subject to a contingent deferred
sales charge as set forth in the Fund's then-current prospectus.
You shall be entitled to receive any sales charge or contingent
deferred sales charge in respect of the Shares.  Any payments to
dealers shall be governed by a separate agreement between you
and such dealer and the Fund's then-current prospectus.

         3.  Term

         This agreement shall continue until the date (the
"Reapproval Date") set forth on Exhibit A hereto (and, if the
Fund has Series, a separate Reapproval Date shall be specified
on Exhibit A for each Series), and thereafter shall continue
automatically for successive annual periods ending on the day
(the "Reapproval Day") of each year set forth on Exhibit A
hereto, provided such continuance is specifically approved at
least annually by (i) the Fund's Board or (ii) vote of a
majority (as defined in the Investment Company Act of 1940) of
the Shares of the Fund or the relevant Series, as the case may
be, provided that in either event its continuance also is
approved by a majority of the Board members who are not
"interested persons" (as defined in said Act) of any party to
this agreement, by vote cast in person at a meeting called for
the purpose of voting on such approval.  This agreement is
terminable without penalty, on 60 days' notice, by vote of
holders of a majority of the Fund's or, as to any relevant
Series, such Series' outstanding voting securities or by the
Fund's Board as to the Fund or the relevant Series, as the case
may be.  This agreement is terminable by you, upon 270 days'
notice, effective on or after the fifth anniversary of the date
hereof.  This agreement also will terminate automatically, as to
the Fund or relevant Series, as the case may be, in the event of
its assignment (as defined in said Act).

         4.  Exclusivity

         So long as you act as the distributor of Shares, you
shall not perform any services for any entity other than
investment companies advised or administered by The Dreyfus
Corporation.  The Fund acknowledges that the persons employed by
you to assist in the performance of your duties under this
agreement may not devote their full time to such service and
nothing contained in this agreement shall be deemed to limit or
restrict your or any of your affiliates right to engage in and
devote time and attention to other businesses or to render
services of whatever kind or nature.


         5.  Miscellaneous

         This agreement has been executed on behalf of the Fund
by the undersigned officer of the Fund in his capacity as an
officer of the Fund.  The obligations of this agreement shall
only be binding upon the assets and property of the Fund and
shall not be binding upon any Board member, officer or
shareholder of the Fund individually.

         Please confirm that the foregoing is in accordance with
your understanding and indicate your acceptance hereof by
signing below, whereupon it shall become a binding agreement
between us.




                        Very truly yours,

                        DREYFUS INSTITUTIONAL SHORT TERM
                          TREASURY FUND



                        By:


Accepted:

PREMIER MUTUAL FUND SERVICES, INC.



By:________________________




                            EXHIBIT A



               Reapproval Date                    Reapproval Day

               February 28, 1996                  February 28th


<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000912492
<NAME> DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
<SERIES>
<NUMBER> 1
<NAME> CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1994
<PERIOD-END>                               SEP-30-1994
<INVESTMENTS-AT-COST>                           123335
<INVESTMENTS-AT-VALUE>                          122733
<RECEIVABLES>                                     1536
<ASSETS-OTHER>                                     183
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  124452
<PAYABLE-FOR-SECURITIES>                          9992
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          892
<TOTAL-LIABILITIES>                              10884
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        114938
<SHARES-COMMON-STOCK>                            46153
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          (769)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         (601)
<NET-ASSETS>                                     90421
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 3329
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     169
<NET-INVESTMENT-INCOME>                           3160
<REALIZED-GAINS-CURRENT>                         (769)
<APPREC-INCREASE-CURRENT>                        (602)
<NET-CHANGE-FROM-OPS>                             1789
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         2163
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          95734
<NUMBER-OF-SHARES-REDEEMED>                    (50186)
<SHARES-REINVESTED>                                580
<NET-CHANGE-IN-ASSETS>                          113468
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              119
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    169
<AVERAGE-NET-ASSETS>                             43313
<PER-SHARE-NAV-BEGIN>                             2.00
<PER-SHARE-NII>                                    .10
<PER-SHARE-GAIN-APPREC>                          (.04)
<PER-SHARE-DIVIDEND>                             (.10)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               1.96
<EXPENSE-RATIO>                                   .002
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000912492
<NAME> DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
<SERIES>
<NUMBER> 2
<NAME> CLASS B
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1994
<PERIOD-END>                               SEP-30-1994
<INVESTMENTS-AT-COST>                           123335
<INVESTMENTS-AT-VALUE>                          122733
<RECEIVABLES>                                     1536
<ASSETS-OTHER>                                     183
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  122452
<PAYABLE-FOR-SECURITIES>                          9992
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          892
<TOTAL-LIABILITIES>                              10884
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        114938
<SHARES-COMMON-STOCK>                            11753
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          (769)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         (601)
<NET-ASSETS>                                     23147
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 3329
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     169
<NET-INVESTMENT-INCOME>                           3160
<REALIZED-GAINS-CURRENT>                         (769)
<APPREC-INCREASE-CURRENT>                        (602)
<NET-CHANGE-FROM-OPS>                             1789
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          997
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          27525
<NUMBER-OF-SHARES-REDEEMED>                    (16264)
<SHARES-REINVESTED>                                467
<NET-CHANGE-IN-ASSETS>                          113468
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              119
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    169
<AVERAGE-NET-ASSETS>                             21533
<PER-SHARE-NAV-BEGIN>                             2.00
<PER-SHARE-NII>                                    .09
<PER-SHARE-GAIN-APPREC>                          (.03)
<PER-SHARE-DIVIDEND>                             (.09)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               1.97
<EXPENSE-RATIO>                                   .005
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission