SUPPLEMENT TO THE PROSPECTUSES AND
                    STATEMENTS OF ADDITIONAL INFORMATION OF


                                                              
               KEYSTONE FUND FOR TOTAL RETURN                      KEYSTONE AMERICA OMEGA FUND, INC.
             KEYSTONE GLOBAL OPPORTUNITIES FUND                     KEYSTONE STRATEGIC INCOME FUND
                    KEYSTONE AMERICA                                KEYSTONE TAX FREE INCOME FUND
          HARTWELL EMERGING GROWTH FUND, INC.                          KEYSTONE WORLD BOND FUND
             KEYSTONE HARTWELL GROWTH FUND                          KEYSTONE FUND OF THE AMERICAS
                     (THE "FUND(S)")                              KEYSTONE STRATEGIC DEVELOPMENT FUND

     The  prospectus  and statement of additional  information  of each Fund are
hereby supplemented as follows:

        The  following  changes  relating  to each  Fund's  Class B  shares  are
    effective  on June 1,  1995.  The  changes  only  apply  to  Class B  shares
    purchased on or after June 1, 1995.

    * With  respect  to each  Fund,  Keystone  Investment  Distributors  Company
      ("Keystone") generally reallows to brokers or others a commission equal to
      4.00% of the price paid for each Class B share sold plus the first  year's
      service  fee in  advance in the amount of 0.25% of the price paid for each
      Class B share sold.  Beginning  approximately 12 months after the purchase
      of a Class B share, the broker or other party will receive service fees at
      an annual rate of 0.25% of the average daily net asset value of such Class
      B share  maintained by the recipient  outstanding on the books of the Fund
      for specified periods.

    * For the period June 1, 1995 to August 31, 1995,  Keystone  will reallow an
      increased  commission  equal to 4.75% of the price  paid for each  Class B
      share sold to those  broker/dealers  or others who allow their  individual
      selling representatives to participate in the additional 0.75% commission.

    * If  applicable,  a contingent  deferred sales charge is imposed on Class B
      shares purchased on or after June 1, 1995 as follows:

                                                                      Deferred
                                                                    Sales Charge
      Redemption Timing                                                Imposed
      First twelve month period following month of purchase .......     5.00%
      Second twelve month period following month of purchase ......     4.00%
      Third twelve month period following month of purchase .......     3.00%
      Fourth twelve month period following month of purchase ......     3.00%
      Fifth twelve month period following month of purchase .......     2.00%
      Sixth twelve month period following month of purchase .......     1.00%

      No deferred sales charge is imposed on amounts redeemed thereafter.

    * Class B shares purchased on or after June 1, 1995 that are outstanding for
      eight years following the month of purchase will automatically  convert to
      Class A shares  without  the  imposition  of a front-end  sales  charge or
      exchange fee. Class B shares  purchased  prior to June 1, 1995 will retain
      their existing conversion rights.

    * In connection with financing its distribution costs,  including commission
      advances  to  dealers  and  others,  Keystone  has  sold  to  a  financial
      institution  substantially  all of its 12b-1  fee  collection  rights  and
      contingent  deferred sales charge  collection rights in respect of Class B
      shares sold during the two-year period  commencing  approximately  June 1,
      1995. Each Fund has agreed not to reduce the rate of payment of 12b-1 fees
      in  respect  of such  Class B shares  unless it  terminates  such  shares'
      Distribution Plan completely. If it terminates such Distribution Plan, the
      Fund may be subject to possible adverse distribution consequences.

June 1, 1995
                                                                       AMER7-SK