March 12, 1998
DREYFUS INDEX FUNDS
DREYFUS S&P 500 INDEX FUND
DREYFUS MIDCAP INDEX FUND
DREYFUS SMALL CAP STOCK INDEX FUND
DREYFUS INTERNATIONAL STOCK INDEX FUND
SUPPLEMENT TO COMBINED PROSPECTUS
DATED JANUARY 15, 1998
THE FOLLOWING INFORMATION SUPERSEDES AND REPLACES ANY CONTRARY
INFORMATION CONTAINED IN THE SECTION OF THE FUNDS' COMBINED PROSPECTUS
ENTITLED "DESCRIPTION OF THE FUNDS _ MANAGEMENT POLICIES:"
DREYFUS INTERNATIONAL STOCK INDEX FUND seeks to match the investment
results of the Morgan Stanley Capital International Europe, Australia, Far
East (Free) Index Registration Mark ("EAFE Index"), a broadly diversified
international index composed of the equity securities of approximately 1,000
companies located outside the United States. The weightings of stocks in the
EAFE Index are based on each stock's relative total market capitalization.
Because of this weighting, as of October 31, 1997, approximately 29% of the
EAFE Index was composed of equity securities of Japanese issuers.
INDXs0398
