DREYFUS ONE HUNDRED PERCENT US TREASURY LONG TERM FUND
N-30D, 2000-08-25
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Dreyfus
U.S. Treasury
Long Term Fund

SEMIANNUAL REPORT June 30, 2000

(reg.tm)





The  views  expressed herein are current to the date of this report. These views
and  the  composition  of the fund's portfolio are subject to change at any time
based on market and other conditions.

           * Not FDIC-Insured * Not Bank-Guaranteed * May Lose Value


                                 Contents

                                 THE FUND
--------------------------------------------------

                             2   Letter from the President

                             3   Discussion of Fund Performance

                             6   Statement of Investments

                             8   Statement of Financial Futures

                             9   Statement of Assets and Liabilities

                            10   Statement of Operations

                            11   Statement of Changes in Net Assets

                            12   Financial Highlights

                            13   Notes to Financial Statements

                                 FOR MORE INFORMATION
---------------------------------------------------------------------------

                                 Back Cover

                                                                       The Fund

                                                          Dreyfus U.S. Treasury
                                                                 Long Term Fund

LETTER FROM THE PRESIDENT

Dear Shareholder:

We  are pleased to present this semiannual report for Dreyfus U.S. Treasury Long
Term  Fund,  covering the six-month period from January 1, 2000 through June 30,
2000.  Inside,  you' ll find valuable information about how the fund was managed
during  the  reporting  period,  including  a  discussion with Gerald Thunelius,
portfolio  manager  and  a  member of the Dreyfus Taxable Fixed Income Team that
manages the fund.

Tighter monetary policy adversely affected most -- but not all -- sectors of the
bond  market over the past six months. This was primarily a result of efforts by
the  Federal  Reserve  Board  (the  "Fed" ) to  forestall potential inflationary
pressures.  The  Fed  raised  short-term  interest  rates three times during the
reporting  period,  for  a  total increase of 1.00 percentage points. These rate
hikes  contributed  to  a total interest-rate increase of 1.75 percentage points
since late June 1999, before the current reporting period began.

Higher  interest  rates  led to an erosion of most bond prices, especially among
higher  yielding  securities.  U.S.  Treasury  securities  represented a notable
exception.  Prices  of  these  direct obligations of the federal government rose
primarily because of reduced supply amid robust demand from domestic and foreign
investors.

We  appreciate  your confidence over the past six months, and we look forward to
your continued participation in Dreyfus U.S. Treasury Long Term Fund.

Sincerely,


Stephen E. Canter
President and Chief Investment Officer
The Dreyfus Corporation
July 17, 2000




DISCUSSION OF FUND PERFORMANCE

Gerald Thunelius, Portfolio Manager Dreyfus Taxable Fixed Income Team

How did Dreyfus U.S. Treasury Long Term Fund perform relative to its benchmark?

During  the  six-month reporting period ended June 30, 2000, the fund produced a
total return of 6.35%.(1) In comparison, the fund's benchmark, the Merrill Lynch
Governments,  U.S.  Treasury,  Long-Term  (10  Years and Over) Index, provided a
total return of 9.12% over the same period.(2)

We  attribute  the  fund's  underperformance to our security selection strategy
that,  consistent  with our efforts to maximize income, emphasized seasoned over
newly  issued  U.S.  Treasury  bonds. The more current U.S. Treasury bond issues
significantly outperformed the seasoned issues. The fund did not own the current
30-year U.S. Treasury bond and, as a result, the fund did not perform as well in
comparison with its benchmark on a total return basis.

What is the fund's investment approach?

As  a  U.S.  Treasury  securities fund, our goal is to provide shareholders with
current  income  through an investment vehicle that is composed of U.S. Treasury
bills,  notes,  bonds  and other securities that are issued or guaranteed by the
United  States  Government, its agencies or instrumentalities. The fund may also
invest  in  options  and  futures  and  enter  into  repurchase  agreements with
securities dealers that are backed by U.S. Treasuries.

Since  U.S.  Treasury  bills,  notes  and bonds are backed by the full faith and
credit  of  the U.S. Government, they are generally considered to rank among the
highest  quality  investments  available. By investing in these obligations, the
fund  seeks  to  maintain  a high degree of credit safety. Of course, the market
value  of  the fund's securities and the value of fund shares are not insured or
guaranteed  by  the  U.S.  Government.  The  fund generally maintains an average
dollar-weighted  maturity that exceeds 10 years, which can result in significant
volatility if interest rates rise.

                                                             The Fund


DISCUSSION OF FUND PERFORMANCE (CONTINUED)

What other factors influenced the fund's performance?

First, the fund was influenced by inflation fears and rising interest rates over
the  past  six  months.  When  the  reporting  period  began on January 1, 2000,
investors  were  relieved  that  Y2K-related concerns proved unfounded. However,
investors  soon  became  worried  that  robust  economic  growth  might rekindle
long-dormant  inflationary  pressures,  especially  since both energy prices and
wages  in  a  tight  job  market  were  rising.  In  an attempt to relieve these
pressures,  the Federal Reserve Board has raised short-term interest rates three
times during the reporting period.

Second,  the  fund  responded  to  forces  that  are unique to the U.S. Treasury
securities  marketplace,  which recently provided attractive returns compared to
other  market sectors. In mid-January the government announced that it would use
a  portion of the budget surplus to initiate a buyback program for U.S. Treasury
securities.  This  announcement  triggered a wave of purchases of long-term U.S.
Treasury securities. Yields for these long-term securities were driven down past
yields  of  short-term  securities  and  as  a  result created what is called an
inverted yield curve.

What is the fund's current strategy?

We  have  continued  our  efforts  to  invest  the fund's assets in areas of the
long-term  U.S.  Treasury  securities  market  that  we  believe  offer the most
attractive  income  opportunities.  Accordingly,  we have established the fund's
average  duration  --  a measure of sensitivity to changing interest rates -- at
approximately  10 years, a level that we consider neutral relative to the fund's
benchmark.  Our duration management strategy was designed to help us balance the
benefits  of  locking  in prevailing yields while maintaining the flexibility to
capture  higher  yields if they became available. In addition, we believe that a
neutral  duration  management  strategy  enables us to derive greater value from
other  fixed-income  investment  strategies,  such  as  yield  curve risk-reward
analysis,  for  as  long  as  the  future  direction  of  interest rates remains
uncertain.


We  recently  reduced  our  holdings  of  U.S.  Government  agency securities to
approximately  6% of the fund's assets. This shift proved beneficial to the fund
after  members  of  Congress  and  the  U.S.  Treasury Department questioned the
investment  policies  of some government agencies. Instead, we focused primarily
on  U.S.  Treasury  notes  and  bonds  during  the  reporting  period.  We  also
participated  in  the U.S. Treasury Inflation Protected Securities market, which
helped us as inflation concerns have risen.

July 17, 2000

(1)  TOTAL RETURN INCLUDES REINVESTMENT OF DIVIDENDS AND ANY CAPITAL GAINS PAID.
PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. SHARE PRICE, YIELD AND
INVESTMENT RETURN FLUCTUATE SUCH THAT UPON REDEMPTION, FUND SHARES MAY BE WORTH
MORE OR LESS THAN THEIR ORIGINAL COST. TOTAL RETURN INCLUDES REINVESTMENT OF
DIVIDENDS. RETURN FIGURES PROVIDED REFLECT THE ABSORPTION OF FUND EXPENSES BY
THE DREYFUS CORPORATION PURSUANT TO AN UNDERTAKING IN EFFECT THAT MAY BE
EXTENDED, TERMINATED OR MODIFIED AT ANY TIME. HAD THESE EXPENSES NOT BEEN
ABSORBED, THE FUND'S RETURN WOULD HAVE BEEN LOWER.

(2)  SOURCE: LIPPER INC. -- REFLECTS REINVESTMENT OF DIVIDENDS AND, WHERE
APPLICABLE, CAPITAL GAIN DISTRIBUTIONS. THE MERRILL LYNCH GOVERNMENTS, U.S.
TREASURY, LONG-TERM (10 YEARS AND OVER) INDEX IS AN UNMANAGED PERFORMANCE
BENCHMARK FOR TREASURY SECURITIES WITH MATURITIES OF 10 YEARS AND OVER; ISSUES
IN THE INDEX MUST HAVE PAR AMOUNTS OUTSTANDING GREATER THAN OR EQUAL TO $1
BILLION.

                                                             The Fund

STATEMENT OF INVESTMENTS

<TABLE>

June 30, 2000 (Unaudited)



                                                                                             Principal
BONDS AND NOTES--88.7%                                                                       Amount ($)                Value ($)
------------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                          <C>                        <C>

U.S. GOVERNMENT AGENCIES--5.6%

Federal National Mortgage Association,

   Principal Strips, 0%, 1/15/2030                                                           10,000,000                1,352,000

Tennessee Valley Authority,

  Valley Indexed Principal Securities,

   3.375%, 1/15/2007                                                                          5,000,000  (a)           5,011,329

                                                                                                                       6,363,329

U.S. TREASURY BONDS--68.5%

6.25%, 8/15/2023                                                                              2,000,000                2,013,120

6.25%, 5/15/2030                                                                             22,121,000               23,227,050

7.5%, 11/15/2016                                                                              5,000,000                5,632,800

7.875%, 2/15/2021                                                                             7,000,000                8,314,670

8.5%, 2/15/2020                                                                               7,600,000                9,514,212

8.75%, 5/15/2017                                                                             12,500,000               15,714,750

8.75%, 5/15/2020                                                                              4,500,000                5,765,625

9.125%, 5/15/2018                                                                             3,000,000                3,915,000

10.375%, 11/15/2009                                                                           2,500,000                2,865,625

                                                                                                                      76,962,852

U.S. TREASURY INFLATION PROTECTION SECURITIES--10.0%

3.625%, 7/15/2002                                                                             2,000,000  (a)           2,123,655

3.875%, 4/15/2029                                                                             8,750,000  (a)           9,085,547

                                                                                                                      11,209,202

U.S. TREASURY PRINCIPAL STRIPS--4.6%

0%, 11/15/2004                                                                                6,750,000                5,133,105

TOTAL BONDS AND NOTES

   (cost $98,719,462)                                                                                                 99,668,488
------------------------------------------------------------------------------------------------------------------------------------

OPTIONS--.1%                                                                                  Contracts
------------------------------------------------------------------------------------------------------------------------------------

PUT OPTIONS;

U.S. Treasury Notes, 6.5%, 2/15/2010,

  August 2000 @ $103.578125

   (cost $100,781)                                                                                   75                   89,175


                                                                                              Principal
SHORT-TERM INVESTMENTS--10.6%                                                                 Amount ($)              Value ($)
------------------------------------------------------------------------------------------------------------------------------------

U.S. GOVERNMENT AGENCIES--8.4%

Federal Home Loan Banks

   6.3%, 7/3/2000                                                                             9,455,000                9,451,691

U.S. TREASURY BILLS--2.2%

5.33%, 7/20/2000                                                                                920,000  (b)             917,645

5.6%, 7/27/2000                                                                                 650,000  (c)             647,699

5.51%, 8/17/2000                                                                                855,000                  849,023

                                                                                                                       2,414,367

TOTAL SHORT-TERM INVESTMENTS

   (cost $11,865,323)                                                                                                 11,866,058
------------------------------------------------------------------------------------------------------------------------------------

TOTAL INVESTMENTS (cost $110,685,566)                                                             99.4%              111,623,721

CASH AND RECEIVABLES (NET)                                                                          .6%                  729,673

NET ASSETS                                                                                       100.0%              112,353,394

(A) PRINCIPAL AMOUNT FOR ACCRUAL PURPOSES IS PERIODICALLY ADJUSTED BASED ON CHANGES TO THE CONSUMER PRICE INDEX.

(B) PARTIALLY HELD BY THE CUSTODIAN IN A SEGREGATED ACCOUNT AS COLLATERAL FOR OPEN FINANCIAL FUTURES POSITIONS.

(C) WHOLLY HELD BY THE CUSTODIAN IN A SEGREGATED ACCOUNT AS COLLATERAL FOR OPEN FINANCIAL FUTURES POSITIONS.

SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>

                                                             The Fund


STATEMENT OF FINANCIAL FUTURES

<TABLE>

June 30, 2000 (Unaudited)

                                                                                                                Unrealized
                                                              Market Value                                    Appreciation
                                                                Covered by                                   (Depreciation)
                                            Contracts         Contracts ($)          Expiration            at 6/30/2000 ($)
------------------------------------------------------------------------------------------------------------------------------------
<S>                                             <C>              <C>                 <C>                       <C>

FINANCIAL FUTURES (LONG)

U.S. Treasury 30 Year Bonds                       385          37,477,344            September 2000            76,750

FINANCIAL FUTURES (SHORT)

U.S. Government Agency
   10 Year Notes                                  119          11,005,641            September 2000           (70,469)

U.S. Treasury 5 Year Notes                        119          11,782,859            September 2000           (16,422)

U.S. Treasury 10 Year Notes                       114          11,227,219            September 2000           (29,343)

                                                                                                              (39,484)

SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>



STATEMENT OF ASSETS AND LIABILITIES

June 30, 2000 (Unaudited)

                                                             Cost  Value
--------------------------------------------------------------------------------

ASSETS ($):

Investments in securities--See Statement of
Investments                                           110,685,566   111,623,721

Interest receivable                                                   1,170,666

Receivable for shares of Beneficial Interest subscribed                   4,617

Prepaid expenses                                                          9,207

                                                                    112,808,211
--------------------------------------------------------------------------------

LIABILITIES ($):

Due to The Dreyfus Corporation and affiliates                            58,000

Cash overdraft due to Custodian                                         159,137

Payable for futures variation margin--Note 4(a)                         106,094

Payable for shares of Beneficial Interest redeemed                       94,001

Accrued expenses                                                         37,585

                                                                        454,817
--------------------------------------------------------------------------------

NET ASSETS ($)                                                      112,353,394
--------------------------------------------------------------------------------

COMPOSITION OF NET ASSETS ($):

Paid-in capital                                                     131,101,112

Accumulated net realized gain (loss) on investments                 (19,646,389)

Accumulated net unrealized appreciation (depreciation)
   on investments [including ($39,484) net unrealized
   (depreciation) on financial futures]--Note 4(b)                      898,671
--------------------------------------------------------------------------------

NET ASSETS ($)                                                      112,353,394
--------------------------------------------------------------------------------

SHARES OUTSTANDING

(unlimited number of $.001 par value shares of Beneficial
 Interest authorized)                                                 7,761,573

NET ASSET VALUE, offering and redemption price per share ($)              14.48

SEE NOTES TO FINANCIAL STATEMENTS.

                                                             The Fund


STATEMENT OF OPERATIONS

Six Months Ended June 30, 2000 (Unaudited)

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

INVESTMENT INCOME ($):

INTEREST INCOME                                                      3,738,718

EXPENSES:

Management fee--Note 3(a)                                              340,294

Shareholder servicing costs--Note 3(b)                                 185,536

Professional fees                                                       25,808

Trustees' fees and expenses--Note 3(c)                                  19,848

Registration fees                                                       12,482

Custodian fees--Note 3(b)                                                8,358

Prospectus and shareholders' reports                                     4,700

Loan commitment fees--Note 2                                               491

Miscellaneous                                                            7,186

TOTAL EXPENSES                                                         604,703

Less--reduction in management fee due to undertaking--Note 3(a)       (150,994)

NET EXPENSES                                                           453,709

INVESTMENT INCOME--NET                                               3,285,009
--------------------------------------------------------------------------------

REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS--NOTE 4 ($):

Net realized gain (loss) on investments and options written         (2,146,845)

Net realized gain (loss) on financial futures                          789,585

NET REALIZED GAIN (LOSS)                                            (1,357,260)

Net unrealized appreciation (depreciation) on investments
  [including ($39,484) net unrealized (depreciation) on financial
futures]                                                             4,977,753

NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS               3,620,493

NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS                 6,905,502

SEE NOTES TO FINANCIAL STATEMENTS.



STATEMENT OF CHANGES IN NET ASSETS

                                         Six Months Ended
                                            June 30, 2000           Year Ended
                                              (Unaudited)    December 31, 1999
--------------------------------------------------------------------------------

OPERATIONS ($):

Investment income--net                          3,285,009            7,150,740

Net realized gain (loss) from investments      (1,357,260)         (14,776,796)

Net unrealized appreciation (depreciation)
   on investments                               4,977,753           (3,456,099)

NET INCREASE (DECREASE) IN NET ASSETS
   RESULTING FROM OPERATIONS                    6,905,502          (11,082,155)
--------------------------------------------------------------------------------

DIVIDENDS TO SHAREHOLDERS FROM ($):

INVESTMENT INCOME--NET                         (3,285,009)          (7,150,740)
--------------------------------------------------------------------------------

BENEFICIAL INTEREST TRANSACTIONS ($):

Net proceeds from shares sold                  17,340,342          119,178,620

Dividends reinvested                            2,145,957            4,516,859

Cost of shares redeemed                       (32,051,266)        (126,050,055)

INCREASE (DECREASE) IN NET ASSETS FROM
   BENEFICIAL INTEREST TRANSACTIONS           (12,564,967)          (2,354,576)

TOTAL INCREASE (DECREASE) IN NET ASSETS        (8,944,474)         (20,587,471)
--------------------------------------------------------------------------------

NET ASSETS ($):

Beginning of Period                           121,297,868          141,885,339

END OF PERIOD                                 112,353,394          121,297,868
--------------------------------------------------------------------------------

CAPITAL SHARE TRANSACTIONS (SHARES):

Shares sold                                     1,232,399            7,900,927

Shares issued for dividends reinvested            150,906              303,591

Shares redeemed                                (2,277,093)          (8,358,173)

NET INCREASE (DECREASE) IN SHARES OUTSTANDING    (893,788)            (153,655)

SEE NOTES TO FINANCIAL STATEMENTS.

                                                             The Fund


FINANCIAL HIGHLIGHTS

The  following table describes the performance for the fiscal periods indicated.
Total return shows how much your investment in the fund would have increased (or
decreased)  during  each  period,  assuming you had reinvested all dividends and
distributions.  These  figures  have  been  derived  from  the  fund's financial
statements.

<TABLE>

                                             Six Months Ended
                                              June 30, 2000                   Year Ended December 31,
                                               (Unaudited)        -----------------------------------------------------------
                                                               1999       1998          1997           1996          1995
------------------------------------------------------------------------------------------------------------------------------------
<S>                                                 <C>         <C>        <C>          <C>             <C>           <C>

PER SHARE DATA ($):

Net asset value,
   beginning of period                               14.01      16.11      15.30         14.61          15.51         13.26

Investment Operations:

Investment income--net                                 .41        .82        .80           .93            .98           .96

Net realized and unrealized gain
   (loss) on investments                               .47      (2.10)       .81           .69           (.89)         2.25

Total from Investment Operations                       .88      (1.28)      1.61          1.62            .09          3.21

Distributions:

Dividends from investment
   income--net                                        (.41)      (.82)      (.80)         (.93)           (.99)        (.96)

Net asset value, end of period                       14.48      14.01      16.11         15.30           14.61        15.51
------------------------------------------------------------------------------------------------------------------------------------

TOTAL RETURN (%)                                     12.73(a)   (8.14)     10.77         11.69             .87        24.91
------------------------------------------------------------------------------------------------------------------------------------

RATIOS/SUPPLEMENTAL DATA (%):

Ratio of expenses to average net
   assets                                              .80(a)     .80        .80           .80             .80          .87

Ratio of net investment income
   to average net assets                              5.78(a)    5.45       5.10          6.48            6.74         6.69

Decrease reflected in above expense
   ratios due to undertakings by
   The Dreyfus Corporation                             .27(a)     .22        .21           .24             .19          .05

Portfolio Turnover Rate                             515.98(b)  495.51    1,181.48       905.99          765.13       634.38
------------------------------------------------------------------------------------------------------------------------------------

Net Assets, end of period
   ($ x 1,000)                                     112,353    121,298     141,885      134,692         135,368      146,445

(A) ANNUALIZED.

(B) NOT ANNUALIZED.

SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>



NOTES TO FINANCIAL STATEMENTS (Unaudited)

NOTE 1--Significant Accounting Policies:

Dreyfus  U.S.  Treasury  Long  Term  Fund  (the  "fund") is registered under the
Investment  Company  Act  of  1940,  as  amended  (the  "Act"), as a diversified
open-end  management  investment  company. The fund's investment objective is to
provide  investors  with as high a level of current income as is consistent with
the  preservation  of capital. The Dreyfus Corporation (the "Manager") serves as
the  fund's  investment  adviser.  The Manager is a direct subsidiary of Mellon
Bank,  N.A.  (" Mellon"), which is a wholly-owned subsidiary of Mellon Financial
Corporation.  Effective  March  22, 2000, Dreyfus Service Corporation ("DSC"), a
wholly-owned  subsidiary  of  the  Manager, became the distributor of the fund's
shares,  which are sold to the public without a sales charge. Prior to March 22,
2000, Premier Mutual Fund Services, Inc. was the distributor.

The  fund's  financial  statements  are  prepared  in accordance with generally
accepted accounting principles which may require the use of management estimates
and assumptions. Actual results could differ from those estimates.

(a)   Portfolio  valuation:  Investments  in  securities  (excluding  short-term
investments  other  than  U.S.  Treasury Bills and financial futures) are valued
each  business day by an independent pricing service ("Service") approved by the
Board of Trustees. Investments for which quoted bid prices are readily available
and  are  representative  of  the  bid side of the market in the judgment of the
Service are valued at the mean between the quoted bid prices (as obtained by the
Service  from dealers in such securities) and asked prices (as calculated by the
Service  based  upon  its  evaluation  of the market for such securities). Other
investments  (which  constitute  a  majority  of  the  portfolio securities) are
carried  at  fair  value  as  determined  by the Service, based on methods which
include  consideration of: yields or prices of securities of comparable quality,
coupon,  maturity  and  type; indications as to values from dealers; and general
market  conditions. Securities for which there are no such valuations are valued
at  fair  value  as determined in good faith under the direction of the Board of
Trustees.  Short-term invest-
                                                                        The Fund

NOTES TO FINANCIAL STATEMENTS (Unaudited) (CONTINUED)

ments,  excluding  U.S.  Treasury  Bills,  are  carried at amortized cost, which
approximates  value.  Financial futures are value at the last sales price on the
securities exchange on which such securities are primarily traded or at the last
sales   price   on  the  national  securities  market  on  each  business  day.

(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. Under the terms of the custody agreement, the
fund  receives  net  earnings  credits  based on available cash balances left on
deposit.

(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 of 1986, as amended (the
"Code" ). To the extent that net realized capital gain can be offset by capital
loss carryovers, it is the policy of the fund not to distribute such gain.

(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 interests
of  its  shareholders,  by complying with the applicable provisions of the Code,
and  to  make  distributions  of  taxable  income  sufficient to relieve it from
substantially all Federal income and excise taxes.

The  fund  has  an  unused  capital  loss carryover of approximately $17,033,000
available  for  Federal  income  tax  purposes  to be applied against future net
securities  profits,  if  any,  realized  subsequent  to December 31, 1999. This
amount  is  calculated  based on Federal income tax regulations which may differ
from  financial  reporting  in  accordance  with  generally  accepted accounting
principles.  If  not applied, $2,961,000 of the carryover expires in fiscal 2004
and $14,072,000 expires in fiscal 2007.


NOTE 2--Bank Line of Credit:

The  fund  participates  with  other  Dreyfus-managed  funds  in  a $500 million
redemption  credit  facility  (the  "Facility" ) to be utilized for temporary or
emergency  purposes,  including  the  financing  of  redemptions.  In connection
therewith, the fund has agreed to pay commitment fees on its pro rata portion of
the  Facility.  Interest  is  charged  to  the fund at rates based on prevailing
market  rates  in  effect at the time of borrowing. During the period ended June
30, 2000, the fund did not borrow under the Facility.

NOTE 3--Management Fee and Other Transactions  With Affiliates:

(a)  Pursuant  to a management agreement with the Manager, the management fee is
computed  at  the  annual  rate  of .60 of 1% of the value of the fund's average
daily net assets and is payable monthly. The Manager had undertaken from January
1,  2000 through June 30, 2000 to reduce the management fee paid by the fund, to
the  extent  that  the  fund' s  aggregate  annual expenses, exclusive of taxes,
brokerage  fees,  interest  on  borrowings,  commitment  fees  and extraordinary
expenses,  exceeded  an  annual  rate  of  .80  of 1% of the value of the fund's
average  daily  net  assets.  The  reduction  in management fee, pursuant to the
undertaking, amounted to $150,994 during the period ended June 30, 2000.

(b)  Under  the Shareholder Services Plan, the fund reimburses 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 certain allocated expenses of providing personal services and/or
maintaining  shareholder  accounts.  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. During the period
ended  June  30, 2000, the fund was charged $130,156 pursuant to the Shareholder
Services Plan.

                                                             The Fund

NOTES TO FINANCIAL STATEMENTS (Unaudited) (CONTINUED)

The  fund  compensates  Dreyfus Transfer, Inc., a wholly-owned subsidiary of the
Manager,   under  a  transfer  agency  agreement  for  providing  personnel  and
facilities  to  perform transfer agency services for the fund. During the period
ended  June  30,  2000,  the  fund  was charged $35,835 pursuant to the transfer
agency agreement.

The  fund  compensates  Mellon under a custody agreement for providing custodial
services  for  the  fund.  During  the  period ended June 30, 2000, the fund was
charged $8,358 pursuant to the custody agreement.

(c)  Each  Board  member also serves as a Board member of other funds within the
Dreyfus complex (collectively, the "Fund Group"). Effective April 11, 2000, each
Board member who is not an "affiliated person" as defined in the Act receives an
annual fee of $30,000 and an attendance fee of $4,000 for each in person meeting
and $500 for telephone meetings. These fees are allocated among the funds in the
Fund  Group.  The  Chairman  of  the  Board  receives  an additional 25% of such
compensation.  Prior  to  April  11,  2000,  each  Board  member  who was not an
" affiliated  person" as defined in the Act received from the fund an annual fee
of  $2,500  and an attendance fee of $250 per meeting. The Chairman of the Board
received  an additional 25% of such compensation. Subject to the fund's Emeritus
Program  Guidelines,  Emeritus  Board members, if any, receive 50% of the fund's
annual  retainer  fee  and  per  meeting  fee  paid at the time the Board member
achieves emeritus status.

NOTE 4--Securities Transactions:

(a)  The  aggregate  amount  of  purchases  and  sales  (including  paydowns) of
investment  securities,  excluding  short-term securities, financial futures and
options,  during  the  period  ended June 30, 2000, amounted to $544,201,362 and
$564,537,212, respectively.


In  addition, the following table summarizes the fund's call/put options written
during the period ended June 30, 2000:

<TABLE>

                                                                                      Options Terminated
                                                                                 --------------------------------
                                                  Number of     Premiums                        Net Realized
Options Written:                                  Contracts     Received ($)      Cost ($)      Gain (Loss) ($)
------------------------------------------------------------------------------------------------------------------------------------
<S>                                                  <C>          <C>             <C>           <C>
Contracts outstanding
    December 31, 1999                                 --              --

Contracts written                                    150          123,047

Contracts terminated:

    Closed                                           150          123,047        208,594         (85,547)

CONTRACTS OUTSTANDING
    JUNE 30, 2000                                     --              --

</TABLE>

The  fund  may  purchase  and  write  (sell)  calls/put options in order to gain
exposure to or protect against changes in the market.

As  a writer of call options, the fund receives a premium at the outset and then
bears  the  market  risk  of  unfavorable  changes in the price of the financial
instruments  underlying  the options. Generally, the fund would incur a gain, to
the  extent  of the premium, if the price of the underlying financial instrument
decreases  between  the  date  the  option  is written and the date on which the
option  is terminated. Generally, the fund would realize a loss, if the price of
the financial instrument increases between those dates.

As  writer  of  put  options, the fund receives a premium at the outset and then
bears  the  market  risk  of  unfavorable  changes in the price of the financial
instruments  underlying  the options. Generally, the fund would incur a gain, to
the  extent  of the premium, if the price of the underlying financial instrument
increases  between  the  date  the  option  is written and the date on which the
option  is terminated. Generally, the fund would realize a loss, if the price of
the financial instrument decreases between those dates.

                                                             The Fund

NOTES TO FINANCIAL STATEMENTS (Unaudited) (CONTINUED)

The  fund may invest in financial futures contracts in order to gain exposure to
or  protect against changes in the market. The fund is exposed to market risk as
a  result  of  changes  in  the  value  of the underlying financial instruments.
Investments in financial futures require the fund to "mark to market" on a daily
basis,  which  reflects  the  change in the market value of the contracts at the
close  of  each day's trading. Typically, variation margin payments are received
or  made  to  reflect  daily  unrealized gains or losses. When the contracts are
closed,  the  fund recognizes a realized gain or loss. These investments require
initial  margin  deposits  with  a  custodian,  which  consist  of  cash or cash
equivalents, up to approximately 10% of the contract amount. The amount of these
deposits  is  determined by the exchange or Board of Trade on which the contract
is  traded  and  is  subject to change. Contracts open at June 30, 2000, are set
forth in the Statement of Financial Futures.

(b)  At  June  30, 2000, accumulated net unrealized appreciation on investments,
options  and  financial  futures  was  $898,671,  consisting of $1,459,734 gross
unrealized appreciation and $561,063 gross unrealized depreciation.

At  June  30,  2000, 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).


NOTES

                        For More Information

                        Dreyfus U.S. Treasury Long Term Fund
                        200 Park Avenue
                        New York, NY 10166

                        Manager

                        The Dreyfus Corporation
                        200 Park Avenue
                        New York, NY 10166

                        Custodian

                        Mellon Bank, N.A.
                        One Mellon Bank Center
                        Pittsburgh, PA 15258

                        Transfer Agent & Dividend Disbursing Agent

                        Dreyfus Transfer, Inc.
                        P.O. Box 9671
                        Providence, RI 02940

                        Distributor

                        Dreyfus Service Corporation
                        200 Park Avenue
                        New York, NY 10166


To obtain information:

BY TELEPHONE
Call 1-800-645-6561

BY MAIL  Write to:
The Dreyfus Family of Funds
144 Glenn Curtiss Boulevard
Uniondale, NY 11556-0144

BY E-MAIL  Send your request
to [email protected]

ON THE INTERNET  Information can be viewed online or downloaded from:

http://www.dreyfus.com

(c) 2000 Dreyfus Service Corporation                                   073SA006





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