DREYFUS ONE HUNDRED PERCENT US TREASURY LONG TERM FUND
N-30D, 1999-03-05
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YEAR 2000 ISSUES (UNAUDITED)

  The  fund  could  be  adversely  affected  if the computer systems used by The
Dreyfus  Corporation  and  the  fund' s  other service providers do not properly
process  and  calculate date-related information from and after January 1, 2000.
The  Dreyfus  Corporation  is working to avoid Year 2000-related problems in its
systems  and  to  obtain  assurances  from other service providers that they are
taking  similar  steps.  In  addition,  issuers  of securities in which the fund
invests may be adversely affected by Year 2000-related problems. This could have
an impact on the value of the fund's investments and its share price.

DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

LETTER TO SHAREHOLDERS

Dear Shareholder:

  We  are  pleased  to  report on the performance for Dreyfus U.S. Treasury Long
Term Fund. For the 12-month period ended December 31, 1998, your Fund produced a
total  return,  including  share price changes and dividend income generated, of
10.77% .*  Income  dividends  paid  from net investment income during the period
amounted to approximately $0.799 per share, representing a distribution rate per
share of 4.96%.**

ECONOMIC REVIEW

  During  1998,  the  main  regions  of  the  world  had very different economic
fundamentals.  The  U.S.  entered  the  year  with  a  strong  economy near full
employment, with unemployment only slightly above 4%. The tight labor market led
the  Federal  Reserve Board to contemplate a rise in interest rates early in the
year,  but  world  economic  weakness  generated powerful enough disinflationary
forces  that  the Fed acted instead to ease credit beginning in September. After
many  years of subpar economic growth, continental Europe moved into a sustained
economic  expansion. The overall European economy benefited as interest rates in
peripheral  countries such as Spain and Italy fell, approaching the lower levels
established  by  Germany,  on  the eve of currency unification. Unlike the U.S.,
Europe  has  substantial excess capacity of productive plant and labor. In Asia,
weak  economies  were  pervasive  as  a  result of a financial crisis. The Latin
American  economies weakened in turn as the financial stresses spread throughout
that  region. On balance, there was a substantial weakening of the world economy
over  the  course  of  1998, moderated mainly by the American consumer's role as
"spender of last resort."

A main influence on the U.S. economy during the year was the foreign financial
crisis  and  consequent  cooling  of the world economy. The positive effects hit
first.  Actual  inflation  and  expected inflation dropped, causing a decline in
long-term  Treasury  bond  yields  and  mortgage  rates.  This  caused a boom in
housing.  The  fall in inflation left more of the growth in consumer income with
which to buy goods and services. Thus, consumers benefited from a combination of
good  growth  in  income after inflation, a strong labor market and increases in
the  prices  of assets they owned, including bonds, stocks and real estate. In a
sense,  1998  was  a  year  of  disinflationary boom in the U.S., as above-trend
economic growth coincided with negligible inflation.

  The  negative  effect of Asian weakness was felt in the industrial sector more
than  in  the consumer sector. Corporate profits weakened, especially in sectors
affected  by the Asian crisis, such as world-traded commodities (oil, metals and
paper)    and    exports.

  Evidence  of  a  weaker world economy accumulated during 1998 as the financial
stresses  continued.  A  worsened  financial crisis occurred between the Russian
default  in  mid-August  and  the  fallout from the Long Term Capital Management
hedge  fund crisis through early October. However, energetic steps were taken to
stabilize the Japanese banks, design a support package for Brazil, ease monetary
policy and help overinvested financial institutions rebuild their cash reserves.
Indications  of a calming of financial fears were evident in the final months of
the  year.  In any case, there appears to have been a shift in the priorities of
key policymakers from fighting potential inflation to restimulating future world
economic growth.

  The  global  economy  survived  a  triple financial crisis in 1998 from Japan,
emerging  market  countries  and  overextended  financial  institutions.  Excess
capacity  persists  in  many  worldwide  industries  after years of high capital
spending  followed by the onset of a worldwide weakening in demand. Fortunately,
the  U.S.  has  led  the  world  in  making  the  transition  away  from the old
manufacturing  industries  to  the new growth industries, such as biotechnology,
software,  computer hardware and the Internet. This contributed to the favorable
combination  of low unemployment and low inflation in the U.S., and may yet lead
toward more efficient allocation of capital elsewhere in the world.

  As  1998 ended, interest rates set by central banks remained in a downtrend in
most  parts of the world, including Europe and the U.S. A similar trend had even
begun in many emerging countries, as the stresses of financial crisis relax.

MARKET ENVIRONMENT

  The  flight  to  quality as investors scrambled for a safe haven in 1998 meant
that  yields were propelled significantly lower. The 30-year Treasury bond began
the  year  yielding  5.925%  and  ended  the year yielding 5.096%. At one point,
yields on the same issue reached 4.72%, which was at the peak of fear. Investors
apparently  were  inclined  to  accept  these  significantly  lower  yields  for
Treasuries    in    order    to    lessen    quality    risk.

  To  put the level of fear at that time in perspective, one can look at quality
spreads. Quality spreads are the difference in yield between Treasury yields and
other  investment-  grade  securities  like corporate bonds, mortgage-backed and
government  agency  securities. In October, these quality spreads became as wide
as  those  last  seen  in  the  early  1990s during a recession. They have since
recovered somewhat.

PORTFOLIO OVERVIEW

  Given  the  market  environment,  we  kept the Fund with a longer than neutral
average  maturity.  While  we  normally  maintain  a 10.5-year average portfolio
maturity,  during  the  year the Fund was as high as a 13-year average portfolio
maturity.  This  worked  out  well  for  the  Fund,  as rates did decline, which
increased the value of our portfolio.

  Our  allocation  to government agencies at the end of the reporting period was
approximately  34% . Agencies  were  also  hurt  when spreads were widening last
October.  At  the  end of the Fund's fiscal year, we believed agency yields were
attractive compared to Treasuries.

 During  the  year,  our  biggest  miss  was  the  Treasury Inflation Protected
Securities (TIPS) market. While TIPS are theoretically cheap, as we had written,
the  marketplace  could  not focus on inflation protection during a time when it
seemed    that    a    deflationary    crisis    was    looming    everywhere.

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

               Very truly yours,


           [Gerald E. Thunelius signature]


           Gerald E. Thunelius

           Portfolio Manager

January 15, 1999

New York, N.Y.

* Total return includes reinvestment of dividends and any capital gains paid.

**Distribution  rate per share is based upon dividends per share paid from net
investment income during the period, divided by the net asset value per share at
the end of the period.


DREYFUS U.S. TREASURY LONG TERM FUND                        DECEMBER 31, 1998
- -----------------------------------------------------------------------------

 COMPARISON OF CHANGE IN VALUE OF $10,000 INVESTMENT IN DREYFUS U.S. TREASURY
LONG TERM FUND AND THE MERRILL LYNCH GOVERNMENTS, U.S. TREASURY, LONG-TERM (10
                             YEARS AND OVER) INDEX

$29,650

Merrill Lynch Governments, U.S. Treasury, Long-Term (10 Years and Over) Index*

                                    Dollars

$26,115

Dreyfus U.S. Treasury  Long Term Fund

*Source: Merrill Lynch, Pierce, Fenner and Smith Inc.
<TABLE>

Average Annual Total Returns
- -----------------------------------------------------------------------------

                      One Year Ended                   Five Years Ended                  Ten Years Ended

                     December 31, 1998                 December 31, 1998                December 31, 1998
                     ___________________               ___________________              ___________________
<S>                        <C>                               <C>                             <C>
                           10.77%                            7.20%                           10.08%
- ------------------------

Past performance is not predictive of future performance.
</TABLE>

The above graph compares a $10,000 investment made in Dreyfus U.S. Treasury Long
Term  Fund  on  12/31/88  to  a  $10,000  investment  made  in the Merrill Lynch
Governments,  U.S.  Treasury,  Long-Term (10 Years and Over) Index on that date.
All dividends and capital gain distributions are reinvested.

The Fund invests at least 65% of its net assets in U.S. Treasury securities. The
Fund' s  portfolio  will, under normal market conditions, have a dollar-weighted
average  maturity  of greater than 10 years. The Fund's performance shown in the
line  graph  takes  into account fees and expenses. Unlike the Fund, 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 Index does not take into account charges, fees
and  other expenses. Further information relating to Fund performance, including
expense  reimbursements, if applicable, is contained in the Financial Highlights
section of the Prospectus and elsewhere in this report.

<TABLE>
DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS                                    DECEMBER 31, 1998

                                                                                                  Principal

Bonds and Notes--95.7%                                                                             Amount            Value
- -------------------------------------------------------                                         _____________     _____________
<S>                                                                                            <C>               <C>
U.S. Government Agencies--33.6%

 Federal Farm Credit Bank,

    Notes, 5.85%, 6/10/2005  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $    4,000,000    $    4,125,000

  Federal Home Loan Banks,

    Medium-Term Notes, 6.34%, 6/13/2005  . . . . . . . . . . . . . . . . . . . . . . . . .          4,200,000         4,442,592

  Federal Home Loan Mortgage,

    Medium-Term Notes,

    5.59%, 9/9/2005  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         15,000,000        15,266,100

  Federal National Mortgage Association,

    Medium-Term Notes:

       5.90%, 7/9/2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         10,000,000        10,118,300

       7.125%, 4/30/2026 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          5,000,000         5,856,000

  U.S. Government Gtd. Development,

    Participation Ctfs.

    (Gtd. by U.S. Small Business Administration):

       Ser. 1997-E, 7.30%, 5/1/2017  . . . . . . . . . . . . . . . . . . . . . . . . . . .          1,873,655         2,012,306

       Ser. 1998-E, 6.30%, 5/1/2018  . . . . . . . . . . . . . . . . . . . . . . . . . . .          1,000,000         1,035,000

       Ser. 1998-J, 5.50%, 10/1/2018 . . . . . . . . . . . . . . . . . . . . . . . . . . .          1,800,000         1,778,400

       Ser. 1998-L, 5.80%, 12/1/2018 . . . . . . . . . . . . . . . . . . . . . . . . . . .          3,000,000         3,008,400

                                                                                                                  _____________

                                                                                                                     47,642,098

                                                                                                                  _____________

U.S. Treasury Bonds--57.1%

  10.75%, 2/15/2003  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          2,000,000         2,445,140

  11.875%, 11/15/2003  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          2,500,000         3,264,900

  12.50%, 8/15/2014  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          9,100,000        14,626,703

  8.125%, 8/15/2021  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         33,000,000        44,712,030

  5.50%, 8/15/2028 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         15,250,000        15,983,830

                                                                                                                  _____________

                                                                                                                     81,032,603

                                                                                                                  _____________

U.S. Treasury Coupon Strips--2.7%

  Zero Coupon, 2/15/2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          7,100,000         3,821,220

                                                                                                                  _____________

U.S. Treasury Notes--1.3%

  6.875%, 7/31/1999  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          1,750,000         1,772,190

                                                                                                                  _____________

U.S. Treasury Principal Strips--1.0%

  Zero Coupon, 5/15/2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          2,000,000         1,479,940

                                                                                                                  _____________

TOTAL BONDS AND NOTES

  (cost $136,371,257)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $135,748,051

                                                                                                                  _____________

Options--.2%                                                                                     Contracts
- -------------------------------------------------------------------------------------------    _____________

Call Options;

 U.S. Treasury Notes, 4.75%, 11/15/2008,

   December '99 @$100.375

       (cost $365,625) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              150     $      365,625
                                                                                                                  _____________

DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS (CONTINUED)                        DECEMBER 31, 1998

                                                                                                  Principal

Short-Term Investments--2.4%                                                                       Amount            Value
- -------------------------------------------------------                                         _____________     _____________

U.S. Treasury Bills:

  4.02%, 1/7/1999  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $    1,240,000    $    1,239,278

  3.73%, 1/14/1999 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          2,020,000         2,017,380

  4.40%, 4/1/1999  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            100,000            98,910

                                                                                                                  _____________

  (cost $3,355,345)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                       $    3,355,568
                                                                                                                  _____________

TOTAL INVESTMENTS

  (cost $140,092,227)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              98.3%      $139,469,244
                                                                                                      _______     _____________

CASH AND RECEIVABLES (NET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .               1.7%    $    2,416,095
                                                                                                      _______     _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             100.0%      $141,885,339
                                                                                                      _______     _____________

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>

DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

STATEMENT OF OPTIONS WRITTEN                                DECEMBER 31, 1998

Call Options
____________

Issuer                                                                                           Contracts           Value
_____                                                                                           ____________      ____________
<S>                                                                                                    <C>        <C>
U.S. Treasury Notes, 4.75%, 11/15/2008, December '99 @$104.78125

  (Premium received $159,375)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              150       $    159,375
                                                                                                                  _____________

Put Options
____________

Issuer
_____

U.S. Treasury Notes, 4.75%, 11/15/2008, December '99 @$95.125

  (Premium received $206,250)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              150      $     206,250
                                                                                                                  _____________

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>

DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

STATEMENT OF ASSETS AND LIABILITIES                         DECEMBER 31, 1998

                                                                                                    Cost              Value
                                                                                                _____________     _____________
<S>                                                                                              <C>               <C>
ASSETS:                          Investments in securities--See Statement of Investments . .     $140,092,227      $139,469,244

                                 Cash  . . . . . . . . . . . . . . . . . . . . . . . . . .                              612,889

                                 Receivable for investment securities sold . . . . . . . .                            7,911,609

                                 Interest receivable . . . . . . . . . . . . . . . . . . .                            2,627,790

                                 Receivable for shares of Beneficial Interest subscribed . .                             69,628

                                 Prepaid expenses and other assets . . . . . . . . . . . .                              101,105

                                                                                                                  _____________

                                                                                                                    150,792,265

                                                                                                                  _____________

LIABILITIES:                     Due to The Dreyfus Corporation and affiliates . . . . . .                               69,416

                                 Payable for investments securities purchased  . . . . . .                            7,842,047

                                 Payable for shares of Beneficial Interest redeemed  . . .                              587,331

                                 Outstanding options written, at value
                                   (premium received $365,625)--see
                                   Statement of Options Written  . . . . . . . . . . . . .                              365,625

                                 Accrued expenses  . . . . . . . . . . . . . . . . . . . .                               42,507

                                                                                                                  _____________

                                                                                                                      8,906,926

                                                                                                                  _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $141,885,339

                                                                                                                  _____________

REPRESENTED BY:                  Paid-in capital . . . . . . . . . . . . . . . . . . . . .                         $146,020,655

                                 Accumulated net realized gain (loss) on investments . . .                           (3,512,333)

                                 Accumulated net unrealized appreciation (depreciation)
                                   on investments--Note 4(b) . . . . . . . . . . . . . . .                             (622,983)

                                                                                                                  _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $141,885,339
                                                                                                                  _____________

SHARES OUTSTANDING

(UNLIMITED NUMBER OF $.001 PAR VALUE SHARES OF BENEFICIAL INTEREST AUTHORIZED) . . . . . .                            8,809,016

NET ASSET VALUE, offering and redemption price per share . . . . . . . . . . . . . . . . .                               $16.11
                                                                                                                        _______

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>

DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

STATEMENT OF OPERATIONS                          YEAR ENDED DECEMBER 31, 1998

INVESTMENT INCOME
<S>                                                                                             <C>                <C>
INCOME                           Interest Income . . . . . . . . . . . . . . . . . . . . .                         $  8,097,580

EXPENSES:                        Management fee--Note 3(a) . . . . . . . . . . . . . . . .      $     824,019

                                 Shareholder servicing costs--Note 3(b)  . . . . . . . . .            404,615

                                 Professional fees . . . . . . . . . . . . . . . . . . . .             50,479

                                 Trustees' fees and expenses--Note 3(c)  . . . . . . . . .             41,896

                                 Registration fees . . . . . . . . . . . . . . . . . . . .             29,618

                                 Custodian fees--3(b)  . . . . . . . . . . . . . . . . . .             17,293

                                 Prospectus and shareholders' reports  . . . . . . . . . .             15,290

                                 Loan commitment fees--Note 2  . . . . . . . . . . . . . .              1,309

                                 Miscellaneous . . . . . . . . . . . . . . . . . . . . . .              7,531

                                                                                                 ____________

                                        Total Expenses . . . . . . . . . . . . . . . . . .          1,392,050

                                 Less--reduction in management fee due to

                                    undertaking--Note 3(a) . . . . . . . . . . . . . . . .           (292,049)

                                                                                                 ____________

                                        Net Expenses . . . . . . . . . . . . . . . . . . .                            1,100,001

                                                                                                                   ____________

INVESTMENT INCOME--NET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                            6,997,579

                                                                                                                 ____________

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

                                 Net realized gain (loss) on investments and options written . .  $ 9,497,781

                                 Net realized gain (loss) on financial futures . . . . . .          1,673,589

                                                                                                 ____________

                                        Net Realized Gain (Loss) . . . . . . . . . . . . .                           11,171,370

                                 Net unrealized appreciation (depreciation) on investments . .                       (4,493,318)

                                                                                                                   ____________

NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS . . . . . . . . . . . . . . . . . .                            6,678,052

                                                                                                                   ____________

NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS . . . . . . . . . . . . . . . . . . .                          $13,675,631

                                                                                                                   ____________

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>

DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

STATEMENT OF CHANGES IN NET ASSETS

                                                                                         Year Ended           Year Ended

                                                                                      December 31, 1998    December 31, 1997
                                                                                      __________________   __________________
<S>                                                                                     <C>                 <C>
OPERATIONS:

  Investment income--net . . . . . . . . . . . . . . . . . . . . . . . . . . . .        $    6,997,579      $    8,338,854

  Net realized gain (loss) on investments  . . . . . . . . . . . . . . . . . . .            11,171,370           1,154,534

  Net unrealized appreciation (depreciation) on investments  . . . . . . . . . .            (4,493,318)          4,662,613

                                                                                         _____________       _____________

    Net Increase (Decrease) in Net Assets Resulting from Operations  . . . . . .            13,675,631          14,156,001
                                                                                         _____________       _____________

DIVIDENDS TO SHAREHOLDERS FROM:

  Investment income--net . . . . . . . . . . . . . . . . . . . . . . . . . . . .            (6,997,579)         (8,338,854)
                                                                                         _____________       _____________

BENEFICIAL INTEREST TRANSACTIONS:

  Net proceeds from shares sold  . . . . . . . . . . . . . . . . . . . . . . . .            87,599,125          68,522,044

  Dividends reinvested . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             4,275,403           5,015,689

  Cost of shares redeemed  . . . . . . . . . . . . . . . . . . . . . . . . . . .           (91,359,590)        (80,030,736)
                                                                                         _____________       _____________

    Increase (Decrease) in Net Assets from Beneficial Interest Transactions  . .               514,938          (6,493,003)
                                                                                         _____________       _____________

       Total Increase (Decrease) in Net Assets . . . . . . . . . . . . . . . . .             7,192,990            (675,856)

NET ASSETS:

  Beginning of Period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           134,692,349         135,368,205
                                                                                         _____________       _____________

  End of Period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          $141,885,339        $134,692,349
                                                                                         _____________       _____________

                                                                                            Shares              Shares
                                                                                         _____________       _____________

CAPITAL SHARE TRANSACTIONS:

  Shares sold  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             5,530,831           4,754,904

  Shares issued for dividends reinvested . . . . . . . . . . . . . . . . . . . .               272,160             347,234

  Shares redeemed  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            (5,799,835)          (5,559,241)
                                                                                         _____________       _____________

    Net Increase (Decrease) in Shares Outstanding  . . . . . . . . . . . . . . .                3,156             (457,103)
                                                                                         _____________       _____________

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>

DREYFUS U.S. TREASURY LONG TERM 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.

                                                                                       Year Ended December 31,
                                                                         ______________________________________________________

PER SHARE DATA:                                                      1998         1997         1996         1995         1994
                                                                    ______       ______       ______       ______       ______
<S>                                                                 <C>          <C>          <C>          <C>          <C>
   Net asset value, beginning of period  . . . . . . . . . .        $15.30       $14.61       $15.51       $13.26       $15.68
                                                                    ______       ______       ______       ______       ______

   Investment Operations:

   Investment income-net . . . . . . . . . . . . . . . . . .           .80          .93          .98          .96         1.01

   Net realized and unrealized gain (loss)

       on investments  . . . . . . . . . . . . . . . . . . .           .81          .69         (.89)        2.25        (2.42)
                                                                    ______       ______       ______       ______       ______

   Total from Investment Operations  . . . . . . . . . . . .          1.61         1.62          .09         3.21        (1.41)
                                                                    ______       ______       ______       ______       ______

   Distributions:

   Dividends from investment income--net . . . . . . . . . .          (.80)        (.93)        (.99)        (.96)       (1.01)
                                                                    ______       ______       ______       ______       ______

   Net asset value, end of period  . . . . . . . . . . . . .        $16.11       $15.30       $14.61       $15.51       $13.26
                                                                    ______       ______       ______       ______       ______

TOTAL INVESTMENT RETURN. . . . . . . . . . . . . . . . . . .         10.77%       11.69%        .87%        24.91%       (9.18%)

RATIOS/SUPPLEMENTAL DATA:

   Ratio of expenses to average net assets . . . . . . . . .           .80%         .80%        .80%          .87%         .98%

   Ratio of net investment income

       to average net assets . . . . . . . . . . . . . . . .          5.10%        6.48%       6.74%          6.69%        7.08%

   Decrease reflected in above expense ratios

       due to undertakings by the Manager  . . . . . . . . .           .21%         .24%        .19%           .05%          --

   Portfolio Turnover Rate . . . . . . . . . . . . . . . . .       1,181.48%     905.99%     765.13%        634.38%     1,213.04%

   Net Assets, end of period (000's Omitted) . . . . . . . .       $141,885    $134,692     $135,368      $146,445      $123,403

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>

DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS

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"). Premier Mutual Fund Services, Inc. is the distributor of
the Fund's shares, which are sold to the public without a sales charge.

   Effective  May  15,  1998,  the Fund changed its name from "Dreyfus 100% U.S.
Treasury Long Term Fund" to "Dreyfus U.S. Treasury Long Term Fund".

   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) 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.
Short-term  investments, excluding U.S. Treasury Bills, are carried at amortized
cost, which approximates fair 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. 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 $2,947,000
available  for  Federal  income  tax  purposes  to be applied against future net
securities  profits,  if  any,  realized  subsequent  to  December 31, 1998. The
carryover  does not include net realized securities losses from November 1, 1998
through  December  31, 1998, which are treated, for Federal income tax purposes,
as arising in fiscal 1999. If not applied, the carryover expires in fiscal 2004

NOTE 2--BANK LINE OF CREDIT:

   The  Fund  participates  with  other  Dreyfus-managed funds in a $600 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 DREYFUS U.S.
TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (CONTINUED)

on prevailing market rates in effect at the time of borrowing. During the period
ended December 31, 1998, 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, 1998 through December 31,
1998  to  reduce  the  management  fee  paid by the Fund, to the extent that the
Fund' s  aggregate  annual  expenses (exclusive of taxes, brokerage, 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 $292,049 during the
period ended December 31, 1998.

   (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
December  31,  1998,  the  Fund was charged $300,896 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 services for the Fund. During the period
ended  December  31, 1998, the Fund was charged $75,670 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 December 31, 1998, the Fund was
charged $17,293 pursuant to the custody agreement.

   (C)  Each  trustee  who  is  not an "affiliated person" as defined in the Act
receives from the Fund an annual fee of $2,500 and an attendance fee of $250 per
meeting.  The  Chairman  of  the  Board  receives  an  additional  25%  of  such
compensation and the Trustee Emeritus receives 50% of such compensation.

NOTE 4--SECURITIES TRANSACTIONS:

   (A)  The  aggregate  amount  of purchases and sales of investment securities,
excluding  short-term  securities,  options  and  financial  futures, during the
period  ended  December 31, 1998, amounted to $1,603,534,710 and $1,607,418,308,
respectively.

   In  addition,  the  following  table  summarizes  the Fund's call/put options
written during the period ended December 31, 1998:
<TABLE>

                                                                                                       Options Terminated
                                                                                                      _____________________

                                                                                                                        Net

                                                               Number of          Premiums                           Realized

                                                               Contracts          Received            Cost          Gain (Loss)
                                                              __________         __________         __________      __________
<S>                                                               <C>          <C>                 <C>              <C>
   OPTIONS WRITTEN:

   Contracts outstanding December 31, 1997 . . . . . . . .            --       $       --

   Contracts written . . . . . . . . . . . . . . . . . . .         1,260           884,375
                                                              __________        __________

   Contracts terminated:

       Closed  . . . . . . . . . . . . . . . . . . . . . .           960           518,750         $  280,328       $  238,422

       Expired . . . . . . . . . . . . . . . . . . . . . .            --               --                 --               --
                                                              __________        __________         ___________      ___________

          Total contracts terminated . . . . . . . . . . .           960           518,750         $  280,328       $  238,422
                                                              __________        __________         ___________      ___________

                                                                                                   ___________      ___________

   Contracts outstanding December 31, 1998 . . . . . . . .           300         $ 365,625

                                                              __________        __________
</TABLE>

DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (CONTINUED)

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

As 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.  Contracts open at
December 31, 1998 are set forth in the Statement of Options Written.

   As  a  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.  Contracts open at
December 31, 1998 are set forth in the Statement of Options Written.

   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.  At  December  31, 1998, there were no
financial futures contracts outstanding.

   (B)   At   December  31,1998,  accumulated  net  unrealized  depreciation  on
investments  was  $622,983, consisting of $452,376 gross unrealized appreciation
and $1,075,359 gross unrealized depreciation.

At December 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).


DREYFUS U.S. TREASURY LONG TERM FUND
- -----------------------------------------------------------------------------

REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

SHAREHOLDERS AND BOARD OF TRUSTEES

DREYFUS U.S. TREASURY LONG TERM FUND

   We  have  audited  the  accompanying  statement  of assets and liabilities of
Dreyfus  U.S.  Treasury  Long  Term  Fund  (formerly  known as Dreyfus 100% U.S.
Treasury  Long  Term  Fund), including the statements of investments and options
written,  as  of  December 31, 1998, and the related statement of operations for
the  year then ended, the statement of changes in net assets for each of the two
years  in  the period then ended, and financial highlights for each of the years
indicated  therein.  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
audits.

   We  conducted  our  audits  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  and  financial  highlights.  Our procedures included verification by
examination  of  securities  held  by  the custodian as of December 31, 1998 and
confirmation  of  securities  not  held  by the custodian by correspondence with
others.  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  audits  provide  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  U.S.  Treasury  Long Term Fund at December 31, 1998, the results of its
operations  for  the  year then ended, the changes in its net assets for each of
the two years in the period then ended, and the financial highlights for each of
the   indicated   years,   in  conformity  with  generally  accepted  accounting
principles.





New York, New York

February 11, 1999

IMPORTANT TAX INFORMATION (UNAUDITED)

   For  State  individual income tax purposes, the Fund hereby designates 95.10%
of  the ordinary income dividends paid during the fiscal year ended December 31,
1998  as  attributable  to interest income from direct obligations of the United
States.  Such  dividend are currently exempt from taxation for individual income
tax  purposes in most states, including New York, California and the District of
Columbia.


                                   [reg.tm logo]

                                   (reg.tm)

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










Printed in U.S.A.                                             073AR9812

U.S. Treasury

Long Term Fund

Annual Report

December 31, 1998


COMPARISON OF CHANGE IN VALUE OF $10,000 INVESTMENT
IN DREYFUS U.S. TREASURY LONG TERM FUND AND THE
MERRILL LYNCH GOVERNMENTS, U.S. TREASURY, LONG-TERM
(10 YEARS AND OVER) INDEX

EXHIBIT A:

              MERRILL LYNCH
               GOVERNMENTS,
              U.S. TREASURY,       DREYFUS
                LONG-TERM          U.S. TREASURY
 PERIOD       (10 YEARS AND        LONG TERM
               OVER) INDEX*        FUND

12/31/88           10,000          10,000
12/31/89           11,890          11,622
12/31/90           12,658          12,438
12/31/91           14,991          14,712
12/31/92           16,181          15,823
12/31/93           18,970          18,447
12/31/94           17,560          16,753
12/31/95           22,945          20,925
12/31/96           22,718          21,106
12/31/97           26,112          23,575
12/31/98           29,650          26,115


*Source: Merrill Lynch, Pierce, Fenner and Smith Inc.



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