DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
N-30D, 1998-09-30
Previous: QUAKER INVESTMENT TRUST, 485APOS, 1998-09-30
Next: AVI BIOPHARMA INC, 8-K, 1998-09-30



DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

LETTER TO SHAREHOLDERS

Dear Shareholder:

  We  are  pleased to report the performance for Dreyfus Massachusetts Municipal
Money  Market  Fund  for  the  six-month  period  ended July 31, 1998. Your Fund
produced  an annualized yield of 2.84% and, after taking into account the effect
of compounding, the annualized effective yield was 2.88%.*

The Economy

After growing at a rather heady pace of 5.5% during the first quarter of 1998,

the  U.S.  economy,  as  measured by Gross Domestic Product (GDP), appears to be
slowing  down.  During  the second quarter, numerous signs of weakness appeared.
These  included  slower growth in personal income and corporate profits, reduced
export  bookings,  a  dramatic  drop  in  inventory  stockpiling, a rising trade
deficit,  and  a  slide  in manufacturing orders as evidenced by declines in the
National  Association  of  Purchasing Managers' Index for both June and July. On
the other hand, consumer spending, business investment, and housing construction
all  moved  higher.  On balance, however, weakness largely overcame strength, as
the GDP grew just 1.4% during the second quarter of 1998.

  As  economic growth appeared to downshift at least temporarily, core inflation
(which  excludes  volatile food and energy prices) edged a bit higher toward the
end  of  the  period. Wages and benefits paid to Americans also accelerated over
the  past  year,  fueling  concerns that these gains, coupled with extremely low
unemployment  and  tight  labor  markets,  could push up inflation in the months
ahead.  Indeed  on  July  21,  1998,  Federal  Reserve Board (Fed) Chairman Alan
Greenspan  told  the  Senate  Banking  Committee that while the Asian crisis and
other  factors  may  restrain consumer and business spending enough "to foster a
reasonably  smooth transition to a more sustainable rate of growth," the risk of
a  pickup  in inflation still outweighs the danger of a slump. Interest rates on
money  market  securities  were  virtually  unchanged  since  early 1998. Market
participants,  meanwhile,  await developments both global and domestic which may
have  an  effect on rate levels: included in those events would be any change in
Fed    monetary    policy    which    may    be    forthcoming.

Market Environment/Portfolio Overview

  While  the  Federal Reserve has kept interest rates unchanged for the past six
months,   market  technicals  nevertheless  created  fluctuations  in  rates  on
short-term municipal securities. During the first weeks of January the municipal
money  market  was  particularly  strong due to large cash inflows, although the
market remained in a trading range throughout most of the first quarter of 1998.
However,  in  April,  money  funds  were tapped for income tax payments, placing
upward pressure on rates as funds experienced redemptions.  Supply conditions in
late  May  reversed this trend as municipal fund managers anticipated the effect
of  several billion dollars in notes leaving the market at the end of June. July
brought  stability  back  to  the market as new supply eased the demand pressure
that had existed.

  Unlike  previous  summer  financing periods, this year's calendar of municipal
notes  (consisting mainly of California-exempt paper) was drastically reduced by
a  combination  of  factors.  Due  to the strength of local and state economies,
several issuers reduced the amount of short-term borrowing needed. Additionally,
many  issuers  came  to  market  with maturities outside of the 13-month maximum
maturity  restriction  allowable  for  money  funds,  whereas  these  notes were
eligible for purchase in prior years. Other issues were converted to a synthetic
structure that is not currently permitted for purchase in your Fund. The overall
result  was  a  lower  yield  for  most  one-year paper, both national and state
specific.  Instead,  during this time we utilized the commercial paper market to
keep  average  maturities from shortening significantly. As the fall approaches,
we  anticipate additional buying opportunities in the Massachusetts note market.
We  expect  to  choose  selectively  among  these  issues  and  to structure the
portfolio  in  an  attempt  to  maximize  current  yield  while  maintaining our
commitment to high quality tax-exempt investments.

<PAGE>


  Included  in  this report is a series of detailed statements about your Fund's
holdings  and its financial condition. We hope they are informative. Please know
that  we  appreciate  greatly  your continued confidence in this Fund and in The
Dreyfus Corporation.


               Very truly yours,




               [Richard J. Moynihan signature logo]




               Richard J. Moynihan

               Director, Municipal Portfolio Management

               The Dreyfus Corporation


August 18, 1998

New York, N.Y.

*Annualized   effective  yield  is  based  upon  dividends  declared  daily  and
reinvested monthly.



<PAGE>
<TABLE>
DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS                            JULY 31, 1998 (UNAUDITED)

                                                                                                   Principal

Tax Exempt Investments--99.1%                                                                       Amount            Value
- -------------------------------------------------------
                                                                                                _____________     _____________

<S>                                                                                            <C>               <C>
Town of Ashland, BAN 4%, 12/10/98. . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $    5,000,000    $    5,007,141

Town of Clinton, BAN 4.25%, 11/20/98 . . . . . . . . . . . . . . . . . . . . . . . . . . .          4,000,000         4,003,854


Fitchburg Industrial Development Financing Authority, Industrial Revenue, VRDN

 (Nestal Machinery Project)

  3.65% (LOC; Lasalle National Bank) (a,b) . . . . . . . . . . . . . . . . . . . . . . . .          3,500,000         3,500,000

Town of Holliston, BAN 4%, 6/10/99 . . . . . . . . . . . . . . . . . . . . . . . . . . . .          5,000,000         5,016,538


Massachusetts Bay Transportation Authority:


  CP 3.55%, Series C, 8/17/98 (LOC; WestDeutsche Landesbank) (a) . . . . . . . . . . . . .          8,400,000         8,400,000

  General Transportation System Revenue

    3.40%, Series 84A, 9/1/98 (LOC; State Street Bank and Trust Co.) (a) . . . . . . . . .          4,000,000         4,000,000

  Notes 4.25%, Series A, 2/26/99 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          8,000,000         8,029,834


Massachusetts Health and Education Facilities Authority, Revenue, VRDN:


  (Boston University) 3.70%, Series H (LOC; Landesbank Hessen) (a,b) . . . . . . . . . . .          5,000,000         5,000,000

  (Capital Asset Program):

    3.50%, Series D (Liquidity; Credit Suisse and Insured; MBIA) (b) . . . . . . . . . . .          3,000,000         3,000,000

    3.60%, Series E (LOC; First Chicago Corp.) (a,b) . . . . . . . . . . . . . . . . . . .          2,900,000         2,900,000

  (Childrens Hospital) 3.55%, Series F (LOC; Sanwa Bank) (a,b) . . . . . . . . . . . . . .          2,285,000         2,285,000

  (Hallmark Health Systems) 3.50%, Series B (Insured; FSA and Liquidity; Fleet Bank) (b) . .        5,900,000         5,900,000

  (Harvard University) 3.45%, Series I (Guaranteed by; Harvard University) (b) . . . . . .          2,500,000         2,500,000

  (Partners Healthcare):

    3.40%, Series P-1 (Liquidity: Bayerische Landesbank and Morgan Guaranty Trust Co and

       Insured; FSA) (b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         10,500,000        10,500,000

    3.55%, Series P-2 (Liquidity: Bayerische Landesbank and Morgan Guaranty Trust Co and

       Insured; FSA) (b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         11,000,000        11,000,000


Massachusetts Housing Finance Agency, Refunding, VRDN:


  3.65%, Series A (LOC; Republic National Bank of New York) (a,b)  . . . . . . . . . . . .          5,100,000         5,100,000

  (Multi-Family Housing Project) 3.60%, Series A (LOC; FNMA) (a,b) . . . . . . . . . . . .          5,000,000         5,000,000


Massachusetts Industrial Finance Agency:

 Industrial Revenue:


    (Ocean Spray Cranberries Inc. Project) 3.80%, 10/15/98 . . . . . . . . . . . . . . . .          3,500,000         3,500,000

    VRDN (Cambridge Isotope Labs Inc.) 3.60% (LOC; Fleet Bank) (a,b) . . . . . . . . . . .          1,625,000         1,625,000

  PCR, VRDN (Holyoke Water Power Co. Project)

    3.55% (LOC; Union Bank of Switzerland) (a,b) . . . . . . . . . . . . . . . . . . . . .          7,800,000         7,800,000

  Revenue, VRDN:

    (Eastern Nazarene College) 3.45% (LOC; State Street Bank and Trust Co.) (a,b)  . . . .          1,750,000         1,750,000

    (Heritage at Dartmouth) 3.60% (LOC; Bank of Boston) (a,b)  . . . . . . . . . . . . . .          1,825,000         1,825,000

    (Newbury College) 3.45% (LOC; Bank of Boston) (a,b)  . . . . . . . . . . . . . . . . .          3,820,000         3,820,000

  RRR, VRDN (Ogden Haverhill Project)

    3.55%, Series B (LOC; Union Bank of Switzerland) (a,b) . . . . . . . . . . . . . . . .         13,300,000        13,300,000


Massachusetts Municipal Wholesale Electric Company, Power Supply Systems
Revenue:


  CP 3.60%, Series C, 8/10/98 (LOC; Fleet Bank) (a)  . . . . . . . . . . . . . . . . . . .          7,000,000         7,000,000

  VRDN 3.40%, Series C (Insured; MBIA and Liquidity; Credit Suisse) (b)  . . . . . . . . .         17,465,000        17,465,000


Massachusetts Port Authority, Revenue, CP


  3.50%, Series B, 9/24/98 (LOC; Westdeutsche Landesbank) (a)  . . . . . . . . . . . . . .          6,000,000         6,000,000

DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS (CONTINUED)                JULY 31, 1998 (UNAUDITED)

                                                                                                   Principal

Tax Exempt Investments (continued)                                                                   Amount           Value
- -------------------------------------------------------

                                                                                                _____________     _____________

Massachusetts Water Resource Authority, VRDN:

  3.40%, Series B (Insured; AMBAC and Liquidity; Bank of Nova Scotia) (b)  . . . . . . . .      $  14,200,000     $  14,200,000

  3.65%, Series A (Insured; AMBAC and LOC; Bank of Nova Scotia) (a,b)  . . . . . . . . . .          4,000,000         4,000,000

Town of Methuen, BAN 4.15%, 12/18/98 . . . . . . . . . . . . . . . . . . . . . . . . . . .          2,780,000         2,783,177

Montachusett, Regional Vocational Technical School District, BAN 4%, 7/23/99 . . . . . . .          4,000,000         4,012,206

Town of Plymouth, BAN 4%, 12/16/98 . . . . . . . . . . . . . . . . . . . . . . . . . . . .          7,664,000         7,675,550

Town of Rutland, BAN 4%, 2/10/99 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          5,000,000         5,009,481

Town of Springfield, BAN:

  4.40%, 9/4/98 (BPA; Fleet Bank)  . . . . . . . . . . . . . . . . . . . . . . . . . . . .          4,000,000         4,001,790

  4.25%, 11/20/98 (Repo Agreement; Fleet Bank) . . . . . . . . . . . . . . . . . . . . . .          5,000,000         5,005,855

Town of Sutton, BAN 4%, 4/28/99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          3,775,000         3,783,070

Town of Wellesley, BAN 4%, 6/11/99 . . . . . . . . . . . . . . . . . . . . . . . . . . . .          3,885,000         3,895,294

                                                                                                                  _____________

TOTAL INVESTMENTS (cost $209,593,790). . . . . . . . . . . . . . . . . . . . . . . . . . .              99.1%      $209,593,790

                                                                                                      =======     =============

CASH AND RECEIVABLES (NET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                .9%      $  1,820,909

                                                                                                      =======     =============


NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             100.0%      $211,414,699

                                                                                                      =======     =============

Summary of Abbreviations
- -----------------------------------------------------------------------------

AMBAC       American Municipal Bond Assurance Corporation           LOC         Letter of Credit

BAN         Bond Anticipation Notes                                 MBIA        Municipal Bond Investors Assurance

BPA         Bond Purchase Agreement                                                Insurance Corporation

CP          Commercial Paper                                        PCR         Pollution Control Revenue

FNMA        Federal National Mortgage Association                   RRR         Resources Recovery Revenue

FSA         Financial Security Assurance                            VRDN        Variable Rate Demand Notes


Summary of Combined Ratings
- -----------------------------------------------------------------------------

Fitch (c)            or            Moody's             or            Standard & Poor's              Percentage of Value

_______                            ________                          _________________              ___________________

F1+/F1                             VMIG1/MIG1, P1 (d)                SP1+/SP1, A1+/A1 (d)                72.4%

F2                                 VMIG2/MIG2, P2                    SP2, A2                               3.8

AAA/AA (e)                         Aaa/Aa (e)                        AAA/AA (e)                            1.8

Not Rated (f)                      Not Rated (f)                     Not Rated (f)                        22.0

                                                                                                        _______

                                                                                                        100.0%

                                                                                                        =======



Notes to Statement of Investments:
- -----------------------------------------------------------------------------

(a) Secured  by  letters  of  credit. At July 31, 1998, 39.4% of the Fund's
    net assets  are backed by letters of credit issued by domestic banks,
    foreign banks and government agencies.

(b) Securities  payable  on  demand.  The  interest  rate,  which is subject to
    change, is based upon bank prime rates or an index of market interest rates.

(c) Fitch  currently provides creditworthiness information for a limited number
    of investments.

(d) P1  and  A1 are the highest ratings assigned tax exempt commercial paper by
    Moody's and Standard & Poor's, respectively.

(e) Notes  which  are not F, MIG or SP rated are represented by bond ratings of
    the issuers.

(f) Securities  which,  while not rated by Fitch, Moody's and Standard & Poor's
    have  been determined by the Manager to be of comparable quality to those
    rated securities in which the Fund may invest.

                       SEE NOTES TO FINANCIAL STATMENTS.
</TABLE>

<TABLE>
DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF ASSETS AND LIABILITIES                 JULY 31, 1998 (UNAUDITED)

                                                                                                    Cost              Value


                                                                                                _____________     _____________
<S>                                                                                              <C>               <C>
ASSETS:                          Investments in securities--See Statement of Investments . .     $209,593,790      $209,593,790

                                 Cash  . . . . . . . . . . . . . . . . . . . . . . . . . .                              435,178

                                 Interest receivable . . . . . . . . . . . . . . . . . . .                            1,499,225

                                 Prepaid expenses and other assets . . . . . . . . . . . .                               21,287

                                                                                                                  _____________

                                                                                                                    211,549,480

                                                                                                                  _____________

LIABILITIES:                     Due to The Dreyfus Corporation and affiliates . . . . . .                               86,634

                                 Accrued expenses and other liabilities  . . . . . . . . .                               48,147

                                                                                                                  _____________

                                                                                                                        134,781

                                                                                                                  _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $211,414,699

                                                                                                                  =============


REPRESENTED BY:                  Paid-in capital . . . . . . . . . . . . . . . . . . . . .                         $211,449,561

                                 Accumulated net realized gain (loss) on investments . . .                              (34,862)

                                                                                                                  _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $211,414,699

                                                                                                                  =============

SHARES OUTSTANDING

(UNLIMITED NUMBER OF $.001 PAR VALUE SHARES OF BENEFICIAL INTEREST AUTHORIZED) . . . . . .                          211,464,457

NET ASSET VALUE, offering and redemption price per share . . . . . . . . . . . . . . . . .                                $1.00

                                                                                                                          =====


                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>

<TABLE>
DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF OPERATIONS            SIX MONTHS ENDED JULY 31, 1998 (UNAUDITED)

INVESTMENT INCOME
<S>                                                                                               <C>                <C>
INCOME                           Interest Income . . . . . . . . . . . . . . . . . . . . .                           $3,272,327

EXPENSES:                        Management fee--Note 2(a) . . . . . . . . . . . . . . . .        $   466,550

                                 Shareholder servicing costs--Note 2(b)  . . . . . . . . .             87,852

                                 Registration fees . . . . . . . . . . . . . . . . . . . .             21,847

                                 Professional fees . . . . . . . . . . . . . . . . . . . .             17,877

                                 Custodian fees  . . . . . . . . . . . . . . . . . . . . .              9,528

                                 Prospectus and shareholders' reports  . . . . . . . . . .              4,092

                                 Trustees' fees and expenses--Note 2(c)  . . . . . . . . .              4,071

                                 Miscellaneous . . . . . . . . . . . . . . . . . . . . . .              3,325

                                                                                                  ___________

                                        Total Expenses . . . . . . . . . . . . . . . . . .                              615,142

                                                                                                                    ___________

INVESTMENT INCOME--NET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                            2,657,185

NET REALIZED GAIN (LOSS) ON INVESTMENTS--Note 1(b) . . . . . . . . . . . . . . . . . . . .                                 (398)

                                                                                                                    ___________

NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS . . . . . . . . . . . . . . . . . . .                           $2,656,787

                                                                                                                    ===========


                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>

<TABLE>
DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

STATEMENT OF CHANGES IN NET ASSETS

                                                                                          Six Months Ended

                                                                                            July 31, 1998      Year Ended

                                                                                             (Unaudited)    January 31, 1998

                                                                                          ________________   ________________

OPERATIONS:

<S>                                                                                         <C>                <C>
  Investment income--net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      $    2,657,185     $    5,340,413

  Net realized gain (loss) on investments  . . . . . . . . . . . . . . . . . . . . . .                (398)            (2,725)

                                                                                             _____________      _____________

    Net Increase (Decrease) in Net Assets Resulting from Operations  . . . . . . . . .           2,656,787          5,337,688

                                                                                             _____________      _____________


DIVIDENDS TO SHAREHOLDERS FROM:

  Investment income--net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          (2,657,185)        (5,340,413)

                                                                                             _____________      _____________

BENEFICIAL INTEREST TRANSACTIONS ($1.00 per share):

  Net proceeds from shares sold  . . . . . . . . . . . . . . . . . . . . . . . . . . .         224,111,964        390,207,155

  Dividends reinvested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           1,673,106          3,364,374

  Cost of shares redeemed  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .        (194,033,035)      (405,901,691)

                                                                                             _____________      _____________

    Increase (Decrease) in Net Assets from Beneficial Interest Transactions  . . . . .          31,752,035        (12,330,162)

                                                                                             _____________      _____________

       Total Increase (Decrease) in Net Assets . . . . . . . . . . . . . . . . . . . .          31,751,637        (12,332,887)

NET ASSETS:

  Beginning of period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         179,663,062        191,995,949

                                                                                             _____________      _____________

  End of period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .        $211,414,699       $179,663,062

                                                                                             =============      =============


                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>

<TABLE>
DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

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 each period indicated. This information
has been derived from the Fund's financial statements.


                                                     Six Months Ended

                                                      July 31, 1998                            Year Ended January 31,

                                                                         _______________________________________________________

PER SHARE DATA:                                       (Unaudited)         1998       1997        1996        1995       1994

                                                      __________         ______     ______      ______      ______     ______
<S>                                                     <C>             <C>        <C>         <C>         <C>        <C>
   Net asset value, beginning of period  . . .          $  1.00         $  1.00    $  1.00     $  1.00     $  1.00    $  1.00

                                                         ______          ______     ______      ______      ______     ______

   Investment Operations:

   Investment income--net  . . . . . . . . . .             .014            .030       .028        .033       .027        .021

                                                         ______          ______     ______      ______      ______     ______

   Distributions:

   Dividends from investment income--net . . .            (.014)          (.030)     (.028)      (.033)     (.027)      (.021)

                                                         ______          ______     ______      ______      ______     ______

   Net asset value, end of period  . . . . . .          $  1.00         $  1.00    $  1.00     $  1.00    $  1.00     $  1.00

                                                         ======          ======     ======      ======      ======     ======


TOTAL INVESTMENT RETURN. . . . . . . . . . . .             2.86%*          3.01%      2.86%       3.34%       2.70%      2.12%

RATIOS/SUPPLEMENTAL DATA:

   Ratio of expenses to average net assets . .              .66%*           .63%       .60%        .46%        .28%       .28%

   Ratio of net investment income

       to average net assets . . . . . . . . .             2.85%*          2.97%      2.82%       3.28%       2.73%      2.09%

   Decrease reflected in above expense ratios

       due to undertakings by the Manager  . .               --             .01%       .06%        .19%        .46%       .53%

   Net Assets, end of period (000's Omitted) .          $211,415       $179,663    $191,996    $155,055    $150,811   $87,864
- -----------------------------

*  Annualized.

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>



DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1--SIGNIFICANT ACCOUNTING POLICIES:

  Dreyfus  Massachusetts  Municipal Money Market Fund (the "Fund") is registered
under  the  Investment Company Act of 1940 ("Act") as a non-diversified open-end
management  investment  company.  The  Fund's investment objective is to provide
investors  with  as  high  a  level  of  current  income exempt from Federal and
Massachusetts income taxes as is consistent with the preservation of capital and
the  maintenance of liquidity. The Dreyfus Corporation ("Manager") serves as the
Fund' s  investment  adviser. The Manager is a direct subsidiary of Mellon Bank,
N.A. Premier Mutual Fund Services, Inc. is the distributor of the Fund's shares,
which are sold to the public without a sales charge.

  It  is the Fund's policy to maintain a continuous net asset value per share of
$1.00; the Fund has adopted certain investment, portfolio valuation and dividend
and distribution policies to enable it to do so. There is no assurance, however,
that  the  Fund  will  be able to maintain a stable net asset value per share of
$1.00.

  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 are valued at amortized
cost, which has been determined by the Fund's Board of Trustees to represent the
fair value of the Fund's investments.

(B) SECURITIES TRANSACTIONS AND INVESTMENT INCOME: Securities transactions are
recorded  on  a  trade date basis. Interest income, adjusted for amortization of
premiums  and original issue discounts on investments, is earned from settlement
date and recognized on the accrual basis. Realized gain and loss from securities
transactions  are  recorded  on  the  identified cost basis. Cost of investments
represents  amortized cost. Under the terms of the custodian agreement, the Fund
received  net  earnings  credits of $6,573 during the period ended July 31, 1998
based  on  available  cash  balances  left  on deposit. Income earned under this
arrangement is included in interest income.

  The  Fund  follows  an  investment  policy of investing primarily in municipal
obligations  of  one  state. Economic changes affecting the state and certain of
its  public  bodies  and municipalities may affect the ability of issuers within
the  state to pay interest on, or repay principal of, municipal obligations held
by the Fund.

  (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, if any, 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, 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, which can distribute tax exempt dividends, by
complying  with  the  applicable provisions of the Internal Revenue Code, and to
make distributions of income and net realized capital gain sufficient to relieve
it from substantially all Federal income and excise taxes.

  The  Fund  has  an  unused  capital  loss  carryover  of approximately $34,400
available  for  Federal  income  tax  purposes  to be applied against future net
securities  profits,  if  any,  realized  subsequent to January 31, 1998. If not
applied,  $30,500  of  the  carryover  expires in fiscal 2003, $1,000 expires in
fiscal 2004, $200 expires in fiscal 2005 and $2,700 expires in fiscal 2006.

  At  July 31, 1998, 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).

<PAGE>


DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

NOTE 2--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
 . 50  of  1%  of the value of the Fund's average daily net assets and is payable
monthly.

  (B)  Under  the Shareholder Services Plan, the Fund reimburses Dreyfus Service
Corporation,  a  wholly-owned subsidiary of the Manager, 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 July
31,  1998,  the  Fund  was  charged $53,884 pursuant to the Shareholder Services
Plan.

  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 service for the Fund. During the period
ended  July  31,  1998,  the  Fund  was charged $18,866 pursuant to the transfer
agency agreement.

  (C)  Each  trustee  who  is  not  an "affiliated person" as defined in the Act
receives  from  the  Fund  an  annual  fee  of $1,000. The Chairman of the Board
receives an additional 25% of such compensation.

<PAGE>

dreyfus lion "d" logo                                    (reg.tm)

dreyfus logo                                   (reg.tm)

DREYFUS MASSACHUSETTS

MUNICIPAL MONEY MARKET FUND

200 Park Avenue

New York, NY 10166

MANAGER

The Dreyfus Corporation

200 Park Avenue

New York, NY 10166

CUSTODIAN

The Bank of New York

90 Washington Street

New York, NY 10286

TRANSFER AGENT &

DIVIDEND DISBURSING AGENT

Dreyfus Transfer, Inc.

P.O. Box 9671

Providence, RI 02940










Printed in U.S.A.                                              639SA987

Massachusetts

Municipal Money

Market Fund

Semi-Annual

Report

July 31, 1998





<PAGE>



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