DREYFUS INVESTMENT PORTFOLIOS
N-30D, 1998-09-01
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DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

LETTER TO SHAREHOLDERS

Dear Shareholder:

  We  are  pleased to provide you with your first semi-annual report for Dreyfus
Investment  Portfolios--MidCap Stock Portfolio, which began operations on May 1,
1998.   In the two-month period between May 1, 1998 and June 30, 1998, the close
of  the Portfolio's semi-annual fiscal period, your Portfolio's total return was
- -4.40% .*  This compares with a total return of -3.90% for the Standard & Poor's
MidCap 400 Index for the same period.**

ECONOMIC REVIEW

  Fears  of  Federal  Reserve  Board  tightening  appear  to  have  eased due to
accumulating  evidence  of  slower  overall  economic  growth  since the spring.
Monetary  tightening has been deterred by the Asian financial crisis.  The Fed's
main  domestic  concern  is that the tight labor market has begun to fuel faster
wage  growth  across  many industries. However, thus far rising wages have still
not  meant  rising  prices.   Instead,  this cost-price mix threatens to further
erode corporate profit margins.  Market interest rates have already rejected the
slower   economy,   and   the  interest  rate  curve  has  become  quite  flat.

  The  shift  to  slower  economic growth this spring is largely due to the drag
from  Asia's recession, but may well be reinforced this summer by the multiplier
impacts of the General Motors strike.  Among broader economic factors, the trade
deficit  has  widened  sharply  due  to  both  weak exports and strong growth in
imports.   Also, inventories soared earlier this year, potentially creating some
drag  on  future  production.   However,  thus far slowing industrial output has
largely been met by shortening the manufacturing work week, not by cutting jobs.
Hence,  the  shift  to slower growth has not relieved the tightness in the labor
market.   Instead,  the  virtual absence of bad news has left consumers to enjoy
the  benefits  of rising real wages and lower interest rates that, in turn, have
boosted spending and home ownership.

  Although  growth  in  corporate profits has slowed in many sectors in the past
year,  consensus  estimates  of  future profit growth continue to be cut by many
analysts.  Profit margins had already begun to shrink under the weight of rising
labor costs, making companies' reported profits increasingly dependent on growth
of  sales.   Overall  profits  could  thus prove quite vulnerable to a period of
significantly slower economic growth.

  Virtually  all  Treasury market interest rates have already fallen near to the
floor  set  by  the  Federal  Funds rate.  This implies that further substantial
interest  rate  drops  are unlikely unless the economy weakens enough to justify
action by the Fed to ease credit.

MARKET OVERVIEW

  The  brief  period  when  the Portfolio was operating before June 30, 1998 was
marked  by  general  market  weakness  in  May, followed by a rebound in June by
large-  capitalization  stocks,  primarily  those  with  growth characteristics.
Value  stocks,  especially  those  in  the mid-cap range, were left aside in the
market's June advance.

PORTFOLIO FOCUS

  Most  of  the  Portfolio' s  underperformance occurred in June, and individual
stock  selection was the primary negative factor.  Some of the individual stocks
which  hurt  performance  included  Billing  Concepts,  Tel-Save  Holdings, Cort
Business Services, and Stratus Computer.

  We  are maintaining our policy to construct a portfolio that is sector-neutral
relative  to  the performance benchmark--the Standard & Poor's MidCap 400 Index.
We  remain fully invested at all times, with cash usually less than 5%, and held
purely  for transaction purposes.  We also attempt to keep the beta (volatility)
of the Portfolio at approximately 1.00 relative to the performance benchmark.

  Thank  you  for  your  confidence in Dreyfus.  We look forward to serving your
investment needs.

               Sincerely,





               [John O'Toole, signature logo]

               Portfolio Manager

July 20, 1998

New York, N.Y.

*Total  return  includes  reinvestment of dividends and any capital gains paid.
The Portfolio's performance does not reflect the deduction of additional charges
and  expenses  imposed  in investing in variable insurance contracts, which will
reduce returns.

**SOURCE:   LIPPER  ANALYTICAL  SERVICES, INC. -- Reflects the reinvestment of
income  dividends  and,  where  applicable,  capital  gain  distributions.   The
Standard  & Poor' s MidCap 400 Index is a broad-based index of 400 companies and
is a widely accepted, unmanaged index of mid-cap stock market performance.

<TABLE>
DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS                            JUNE 30, 1998 (UNAUDITED)

Common Stocks--96.9%                                                                                 Shares             Value
- -------------------------------------------------------                                             __________        _________
<S>                                                                                                     <C>            <C>
            Basic Industries--7.3%  ABT Building Products                                               1,000  (a)     $ 17,187

                                    AptarGroup                                                            800            49,750

                                    Ball                                                                1,500            60,281

                                    Caraustar Industries                                                2,300            66,412

                                    Centex Construction Products                                        1,300            50,050

                                    Crompton & Knowles                                                  2,900            73,043

                                    Cytec Industries                                                    1,800  (a)       79,650

                                    International Specialty Products                                    3,700  (a)       68,913

                                    Rohm & Haas                                                           800            83,150

                                                                                                                     __________

                                                                                                                        548,436

                                                                                                                     __________


          Business Services--12.5%  AccuStaff Inc                                                       2,200  (a)       68,750

                                    America Online                                                        800            84,800

                                    BMC Software                                                        2,700  (a)      140,231

                                    Cadence Design System                                               1,900  (a)       59,375

                                    Computer Task Group                                                 1,000            33,500

                                    Compuware                                                           2,000  (a)      102,250

                                    Cort Business Services                                              1,500  (a)       47,250

                                    Hertz, Cl. A                                                        1,800            79,763

                                    Keane                                                                 800  (a)       44,800

                                    Network Associates                                                  1,250  (a)       59,843

                                    SABRE Group Holdings, Cl. A                                         2,100  (a)       79,800

                                    Snyder Communications                                               2,000  (a)       88,000

                                    Sterling Software                                                   2,000  (a)       59,125

                                                                                                                     __________

                                                                                                                        947,487

                                                                                                                     __________


           Capital Spending--13.5%  Allied Waste Industries                                             2,000  (a)       48,000

                                    American Power Conversion                                           1,400  (a)       42,000

                                    Apple Computer                                                        800  (a)       22,950

                                    CHS Electronics                                                     3,100  (a)       55,413

                                    Case                                                                  800            38,600

                                    CellStar                                                            2,000  (a)       25,875

                                    Cummins Engine                                                        700            35,875

                                    Danaher                                                             1,400            51,362

                                    Gulfstream Aerospace                                                1,300  (a)       60,450

                                    Linear Technology                                                   1,000            60,312

                                    Maxim Integrated Products                                           2,400  (a)       76,050

                                    New Holland                                                         1,200            23,550

                                    Solectron                                                             800  (a)       33,650

                                    Storage Technology                                                  1,600  (a)       69,400

                                    Stratus Computer                                                    1,500  (a)       37,969

                                    Tellabs                                                             1,500  (a)      107,437

                                    Timken                                                              2,000            61,625

                                    USA Waste Service                                                   1,000  (a)       49,375

                                    Waters                                                              2,000  (a)      117,875

                                                                                                                     __________

                                                                                                                      1,017,768

                                                                                                                     __________

DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS                            JUNE 30, 1998 (UNAUDITED)

Common Stocks (continued)                                                                            Shares             Value
- -------------------------------------------------------                                             __________        _________

          Consumer Cyclical--15.7%  Bowne & Co.                                                         1,800         $  81,000

                                    Cracker Barrel Old Country Store                                      800            25,400

                                    Dollar Tree Stores                                                  1,200  (a)       48,750

                                    Family Dollar Stores                                                3,200            59,200

                                    Federal-Mogul                                                         400            27,000

                                    Furniture Brands International                                      2,300  (a)       64,543

                                    General Nutrition                                                   1,500  (a)       46,687

                                    Harley-Davidson                                                     1,300            50,375

                                    IHOP                                                                  900  (a)       37,237

                                    King World Productions                                                900  (a)       22,950

                                    Leggett & Platt                                                     2,800            70,000

                                    McClatchy, Cl. A                                                      200             6,925

                                    Nautica Enterprises                                                 1,300  (a)       34,856

                                    Payless ShoeSource                                                    800  (a)       58,950

                                    Proffitt's                                                          2,300  (a)       92,862

                                    Pulitzer Publishing                                                   700            62,475

                                    Ross Stores                                                         2,000            86,000

                                    TJX Cos.                                                            4,800           115,800

                                    V.F                                                                 1,500            77,250

                                    Whole Foods Market                                                    800  (a)       48,400

                                    Zale                                                                2,200  (a)       69,987

                                                                                                                     __________

                                                                                                                      1,186,647

                                                                                                                     __________


            Consumer Staples--4.5%  Alberto-Culver, Cl. B                                               1,000            29,000

                                    Hormel Foods                                                        2,000            69,125

                                    Interstate Bakeries                                                 2,200            73,012

                                    Lancaster Colony                                                      800            30,300

                                    Lauder (Estee)                                                        700            48,781

                                    Universal Foods                                                     3,900            86,531

                                                                                                                     __________

                                                                                                                        336,749

                                                                                                                     __________


                      Energy--6.7%  Cliffs Drilling                                                     1,000  (a)       32,812

                                    Cooper Cameron                                                        900  (a)       45,900

                                    El Paso Natural Gas                                                 1,600            61,200

                                    Helmerich & Payne                                                   2,000            44,500

                                    National Fuel Gas                                                   1,400            60,988

                                    Noble Drilling                                                      2,200  (a)       52,938

                                    Questar                                                             1,900            37,288

                                    Rowan Cos.                                                          2,100  (a)       40,819

                                    Sun                                                                 2,400            93,150

                                    Valero Energy                                                       1,100            36,575

                                                                                                                     __________

                                                                                                                        506,170

                                                                                                                     __________


                 Health Care--8.3%  Arterial Vascular Engineering                                       1,300  (a)       46,475

                                    Ballard Medical Products                                            1,900            34,200

                                    Biogen                                                              1,500  (a)       73,500

DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS                            JUNE 30, 1998 (UNAUDITED)

Common Stocks (continued)                                                                            Shares             Value
- -------------------------------------------------------                                             _________         _________
           Health Care (continued)  Biomet                                                              2,400        $   79,350

                                    Elan, A.D.S.                                                        1,400  (a)       90,038

                                    Lincare Holdings                                                    1,400  (a)       58,888

                                    Rexall Sundown                                                        900  (a)       31,725

                                    STERIS                                                              1,800  (a)      114,469

                                    Watson Pharmaceuticals                                              2,200  (a)      102,713

                                                                                                                     __________

                                                                                                                        631,358

                                                                                                                     __________


         Interest Sensitive--15.1%  AFLAC                                                               1,600            48,500

                                    Bear Stearns Cos.                                                   1,500            85,313

                                    CMAC Investment                                                       800            49,200

                                    Charter One Financial                                               2,200            74,113

                                    City National                                                       2,100            77,569

                                    Cullen/Frost Bankers                                                  900            48,825

                                    Downey Financial                                                      900            29,418

                                    Edwards (A.G.)                                                        800            34,150

                                    FIRSTPLUS Financial Group                                           1,500  (a)       54,000

                                    First Security                                                      1,300            27,828

                                    Imperial Bancorp                                                    1,500  (a)       45,000

                                    Mercantile Bankshares                                               1,500            52,218

                                    North Fork Bancorp                                                    950            23,216

                                    Old Republic International                                          2,300            67,419

                                    PMI Group                                                           1,000            73,375

                                    Provident Financial Group                                           1,500            68,438

                                    RenaissanceRe Holdings                                                900            41,681

                                    SouthTrust                                                          2,200            95,700

                                    T. Rowe Price Associates                                            2,000            75,125

                                    Zions Bancorporation                                                1,300            69,063

                                                                                                                     __________

                                                                                                                      1,140,151

                                                                                                                     __________


           Mining and Metals--1.1%  Bethlehem Steel                                                     2,200  (a)       27,363

                                    Cleveland-Cliffs                                                      200            10,725

                                    General Cable                                                       1,450            41,869

                                                                                                                     __________

                                                                                                                         79,957

                                                                                                                     __________


              Transportation--1.7%  GATX                                                                1,200            52,650

                                    Trico Marine Services                                               1,800  (a)       24,638

                                    UAL                                                                   700  (a)       54,600

                                                                                                                     __________

                                                                                                                        131,888

                                                                                                                     __________


                  Utilities--10.5%  AES                                                                 1,000  (a)       52,563

                                    BEC Energy                                                          2,200            91,300

                                    Century Telephone Enterprises                                       2,300           105,513

                                    Commonwealth Energy Systems                                         3,200           120,800

DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

STATEMENT OF INVESTMENTS                            JUNE 30, 1998 (UNAUDITED)

Common Stocks (continued)                                                                             Shares             Value
- -------------------------------------------------------                                             _________         _________

             Utilities (continued)  DQE                                                                 1,800         $  64,800

                                    GPU                                                                 2,300            86,969

                                    Montana Power                                                       1,500            52,125

                                    Pinnacle West Capital                                               2,200            99,000

                                    STAR Telecommunications                                             1,400  (a)       31,325

                                    Sierra Pacific Resources                                            1,500            54,469

                                    Tel-Save Holdings                                                   2,600  (a)       38,350

                                                                                                                     __________

                                                                                                                        797,214

                                                                                                                     __________


                      TOTAL COMMON STOCKS

                                        (cost $7,558,015)                                                            $7,323,825

                                                                                                                     ==========



                                                                                                   Principal

                                                                                                    Amount

Short-Term Investments--3.7%                                                                      ___________
- ------------------------------------------------------

              U.S. Treasury Bills:  4.90%, 9/17/98                                                   $124,000       $   122,688

                                    4.885%, 9/24/98                                                   126,000           124,560

                                    4.97%, 10/8/98                                                     35,000            34,521

                                                                                                                     __________

                                    TOTAL SHORT-TERM INVESTMENTS

                                        (cost $281,736)                                                              $  281,769

                                                                                                                     ==========


TOTAL INVESTMENTS (cost $7,839,751)                                                                    100.6%        $7,605,594

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


LIABILITIES, LESS CASH AND RECEIVABLES                                                                   (.6%)       $  (44,274)

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


NET ASSETS                                                                                             100.0%        $7,561,320

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





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

(a) Non-income producing.












                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>
DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

STATEMENT OF ASSETS AND LIABILITIES                 JUNE 30, 1998 (UNAUDITED)

                                                                                                   Cost               Value

                                                                                                ____________       ____________
<S>                                                                                               <C>                <C>
ASSETS:                          Investments in securities--See Statement of Investments          $7,839,751         $7,605,594

                                 Cash                                                                                    37,276

                                 Receivable for investment securities sold                                              581,885

                                 Dividends receivable                                                                     2,718

                                 Prepaid expenses--Note 1(e)                                                             29,242

                                 Due from The Dreyfus Corporation and affiliates                                          1,409

                                                                                                                     __________

                                                                                                                      8,258,124

                                                                                                                     __________


LIABILITIES:                     Payable for investment securities purchased                                            653,465

                                 Accrued expenses                                                                        43,339

                                                                                                                     __________

                                                                                                                        696,804

                                                                                                                     __________


NET ASSETS                                                                                                           $7,561,320

                                                                                                                     ==========



REPRESENTED BY:                  Paid-in capital                                                                     $7,831,646

                                 Accumulated undistributed investment income--net                                         7,671

                                 Accumulated net realized gain (loss) on investments                                    (43,840)

                                 Accumulated net unrealized appreciation (depreciation)
                                   on investments--Note 3                                                              (234,157)

                                                                                                                    ___________


NET ASSETS                                                                                                           $7,561,320

                                                                                                                    ===========

SHARES OUTSTANDING

(UNLIMITED NUMBER OF $.001 PAR VALUE SHARES OF BENEFICIAL INTEREST AUTHORIZED)                                         632,856


NET ASSET VALUE, offering and redemption price per share                                                                $11.95


                                                                                                                        ======








                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>
DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

STATEMENT OF OPERATIONS

FROM MAY 1, 1998 (COMMENCEMENT OF OPERATIONS) TO JUNE 30, 1998 (UNAUDITED)

INVESTMENT INCOME
<S>                                                                                         <C>                    <C>
INCOME:                          Interest                                                   $    11,335

                                 Cash dividends                                                   7,299

                                                                                              _________

                                        Total Income                                                              $    18,634

EXPENSES:                        Investment advisory fee--Note 2(a)                               8,222

                                 Auditing fees                                                    5,000

                                 Custodian fees--Note 2(a)                                        4,057

                                 Registration fees                                                2,310

                                 Shareholders' reports                                            1,250

                                 Legal fees                                                       1,130

                                 Trustees' fees and expenses--Note 2(b)                           1,071

                                 Organization expenses--Note 1(e)                                 1,008

                                 Shareholder servicing costs                                        161

                                 Miscellaneous                                                      257

                                                                                              _________

                                        Total Expenses                                           24,466

                                 Less--expense reimbursement from Dreyfus
                                    due to undertaking--Note 2(a)                               (13,503)

                                                                                              __________

                                        Net Expenses                                                                   10,963

                                                                                                                     ________


INVESTMENT INCOME--NET                                                                                                  7,671


REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS--Note 3:

                                 Net realized gain (loss) on investments                     $  (43,840)

                                 Net unrealized appreciation (depreciation)
                                    on investments                                             (234,157)

                                                                                             __________

NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS                                                               (277,997)

                                                                                                                    _________

NET (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS                                                              $(270,326)

                                                                                                                    =========







                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>
DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

STATEMENT    OF    CHANGES    IN    NET    ASSETS

FROM MAY 1, 1998 (COMMENCEMENT OF OPERATIONS) TO JUNE 30, 1998 (UNAUDITED)

OPERATIONS:
<S>                                                                                    <C>                        <C>
   Investment income--net                                                                                      $       7,671

   Net realized gain (loss) on investments                                                                           (43,840)

   Net unrealized appreciation (depreciation) on investments                                                        (234,157)

                                                                                                                  __________

       Net Increase (Decrease) in Net Assets Resulting from Operations                                              (270,326)

                                                                                                                  __________


BENEFICIAL INTEREST TRANSACTIONS:

   Net proceeds from shares sold                                                                                   7,894,686

   Cost of shares redeemed                                                                                          (113,040)

                                                                                                                  __________

       Increase (Decrease) in Net Assets from Beneficial Interest Transactions                                     7,781,646

                                                                                                                  __________

          Total Increase (Decrease) in Net Assets                                                                  7,511,320


NET ASSETS:

   Beginning of Period--Note 1                                                                                        50,000

                                                                                                                  __________

   End of Period                                                                                                   $7,561,320

                                                                                                                  ==========

UNDISTRIBUTED INVESTMENT INCOME--NET                                                                               $   7,671

                                                                                                                  __________


                                                                                                                    Shares

                                                                                                                  __________

CAPITAL SHARE TRANSACTIONS:

   Shares sold                                                                                                       638,446

   Shares redeemed                                                                                                    (9,590)

                                                                                                                  __________

       Net Increase (Decrease) in Shares Outstanding                                                                 628,856

                                                                                                                  ==========











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

DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

FINANCIAL HIGHLIGHTS (UNAUDITED)

  Contained  below  is  per  share  operating  performance  data  for a share of
Beneficial  Intetest outstanding, total investment return, ratios to average net
assets and other supplemental data for the period from May 1, 1998 (commencement
of  operations)  to  June  30,  1998. This information has been derived from the
Series' financial statements.


PER SHARE DATA:
<S>                                                                     <C>                                   <C>
   Net asset value, beginning of period                                                                       $12.50

                                                                                                              ______

   Investment Operations:

   Investment income--net                                                                                        .01

   Net realized and unrealized gain (loss) on investments                                                       (.56)

                                                                                                              ______

   Total from Investment Operations                                                                             (.55)

                                                                                                              ______

   Net asset value, end of period                                                                             $11.95

                                                                                                              ======


TOTAL INVESTMENT RETURN                                                                                        (4.40%)*

RATIOS/SUPPLEMENTAL DATA:

   Ratio of expenses to average net assets                                                                       .17%*

   Ratio of net investment income to average net assets                                                          .12%*

   Decrease reflected in above expense ratio due to undertaking by The Dreyfus Corporation                       .21%*

   Portfolio Turnover Rate                                                                                     11.13%*

   Net Assets, end of period (000's Omitted)                                                                  $7,561
- -------------------

*  Not annualized.
</TABLE>

                      SEE NOTES TO FINANCIAL STATEMENTS.

DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1--SIGNIFICANT ACCOUNTING POLICIES:

Dreyfus Investment Portfolios (the "Fund") had no operations until May 1, 1998
(commencement of operations) other than matters relating to its organization and
registration  as  a diversified open-end management investment company under the
Investment  Company  Act  of 1940 ("Act") and the Securities Act of 1933 and the
sale  and  issuance of 4,000 shares of Beneficial Interest ("Initial Shares") to
The  Dreyfus  Corporation  (" Dreyfus" ). The  Fund operates as a series company
currently  offering  two  series  including  the  MidCap  Stock  Portfolio ("the
Series" ). The  Fund  is  only  offered  to  variable  annuity and variable life
insurance  separate accounts established by insurance companies to fund variable
annuity  contracts and variable life insurance policies and to qualified pension
and  retirement plans. The Series' investment objective is to provide investment
results  that  are  greater than the total return performance of publicly-traded
common stocks of medium-size domestic companies in the aggregate, as represented
by  the  Standard  & Poor' s  MidCap  400  Index.  Dreyfus serves as the Series'
investment  adviser.  Dreyfus  is  a  direct  subsidiary  of  Mellon  Bank, N.A.
(" Mellon" ), which  is  a  wholly-owned  subsidiary of Mellon Bank Corporation.
Premier  Mutual  Fund  Services,  Inc. is the distributor of the Series' shares,
which are sold without a sales charge.

  As  of  June 30, 1998, MBIC Investment Corp., an indirect subsidiary of Mellon
Bank Corporation, held 400,000 shares of the Series.

  The  Fund  accounts  separately  for the assets, liabilities and operations of
each  series.  Expenses directly attributable to each series are charged to that
series'  operations;  expenses  which are applicable to all series are allocated
among them on a pro rata basis.

  The  Series'  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 (including options and
financial futures) are valued 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. Securities not listed on an exchange or the national
securities  market,  or  securities  for  which  there were no transactions, are
valued  at  the average of the most recent bid and asked prices, except for open
short positions, where the asked price is used for valuation purposes. Bid price
is used when no asked price is available. 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.

(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. Dividend income is
recognized  on  the  ex-dividend  date  and  interest  income,  including, where
applicable,  amortization  of  discount  on  investments,  is  recognized on the
accrual  basis.  Under the terms of the custodian agreement, the Series received
net  earnings  credits  of $2,144 during the period ended June 30, 1998 based on
available cash balances left on deposit. Income earned under this arrangement is
included in interest income.

DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

(C) DIVIDENDS TO SHAREHOLDERS: Dividends are recorded on the ex-dividend date.
Dividends  from  investment  income-net  and dividends from net realized capital
gain,  if  any, are normally declared and paid annually, but the Series may make
distributions  on  a  more  frequent  basis  to  comply  with  the  distribution
requirements  of  the  Internal  Revenue  Code.  To the extent that net realized
capital  gain can be offset by capital loss carryovers, if any, it is the policy
of the Series not to distribute such gain.

  (D)  FEDERAL  INCOME  TAXES:  It  is  the policy of the Series 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 Internal
Revenue  Code, and to make distributions of taxable income sufficient to relieve
it from substantially all Federal income and excise taxes.

  (E)  OTHER:  Organization  expenses  paid  by the Fund are included in prepaid
expenses  and  are  being  amortized  to  operations  from May 1, 1998, the date
operations commenced, over the period during which it is expected that a benefit
will  be  realized,  not to exceed five years. At June 30, 1998, the unamortized
balance  of  such  expenses  amounted  to  $29,242. In the event that any of the
Initial  Shares  are  redeemed  during  the  amortization period, the redemption
proceeds  will  be  reduced by any unamortized organization expenses in the same
proportion  as  the  number of such shares being redeemed bears to the number of
such shares outstanding at the time of such redemption.

NOTE 2--INVESTMENT ADVISORY FEE AND OTHER TRANSACTIONS WITH AFFILIATES:

  (A)  Pursuant to an Investment Advisory Agreement with Dreyfus, the investment
advisory  fee  is  computed  at the annual rate of .75 of 1% of the value of the
Series'  average  daily  net assets and is payable monthly. However, Dreyfus had
undertaken  from May 1, 1998 through June 30, 1998, to reduce the management fee
and  reimburse  such  excess expenses paid by the Series, to the extent that the
Series'  aggregate  annual  expenses (exclusive of taxes, brokerage, interest on
borrowings  and  extraordinary  expenses)  exceeded  an annual rate of 1% of the
value  of  the  Series'  average  daily  net  assets. The expense reimbursement,
pursuant  to  the  undertaking, amounted to $13,503 during the period ended June
30, 1998.

  The  Series  compensates  Dreyfus Transfer, Inc., a wholly-owned subsidiary of
Dreyfus,   under  a  transfer  agency  agreement  for  providing  personnel  and
facilities to perform transfer agency services for the Series.

  The  Series  compensates  Mellon  under  a  custody  agreement  for  providing
custodial  services  for  the Series. During the period ended June 30, 1998, the
Series was charged $4,057 pursuant to the custody agreement.

  (B)  Each  trustee  who  is  not  an "affiliated person" as defined in the Act
receives from the Fund an annual fee of $1,000 and an attendance fee of $250 per
meeting.  The  Chairman  of  the  Board  receives  an  additional  25%  of  such
compensation.

DREYFUS INVESTMENT PORTFOLIOS, MIDCAP STOCK PORTFOLIO
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

NOTE 3--SECURITIES TRANSACTIONS:

  The  aggregate  amount  of  purchases  and  sales  of  investment  securities,
excluding  short-term securities, during the period ended June 30, 1998 amounted
to $8,364,449 and $762,841, respectively.

  At  June  30, 1998, accumulated net unrealized depreciation on investments was
$234,157,  consisting  of  $176,340  gross  unrealized appreciation and $410,497
gross unrealized depreciation.

  At  June 30, 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).


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DREYFUS INVESTMENT PORTFOLIOS,

MIDCAP STOCK PORTFOLIO

200 Park Avenue

New York, NY 10166

INVESTMENT ADVISER

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.                                              174SA986

Investment Portfolios,

MIDCAP STOCK PORTFOLIO

Semi-Annual

Report

June 30, 1998



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