DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
NSAR-A, 1999-05-28
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000 A000000 03/31/99
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001 A000000 DREYFUS INSTITUTIONAL SHORT TERM TREAS FUND
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080 A000000 VIGILANT INSURANCE COMPANY
080 B000000 NATIONAL UNION FIRE INSURANCE COMPANY
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SIGNATURE   MICHAEL S. PETRUCELLI
TITLE       V.P & ASST TREASURER


WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000912492
<NAME> DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
<MULTIPLIER> 1000

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</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000912492
<NAME> DREYFUS INSTITUTIONAL SHORT TERM TREASURY FUND
<MULTIPLIER> 1000

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
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[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0



</TABLE>


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