SUPPLEMENT TO SCHEDULE A, DATED MAY 24, 2007

Exhibit 7(c)

SUPPLEMENT TO SCHEDULE A, DATED MAY 24, 2007

        To the Administration Agreement (the “Administration Agreement”), dated as of September 29, 2006, between Xxxxxxx Xxxxx Funds for Institutions Series (the “Trust”), a Massachusetts business trust, on behalf of itself and each of its series listed on Schedule A (each a “Fund” and together the “Funds”), and BlackRock Advisors, LLC (the “Administrator”), a Delaware limited liability company.

        The Trust on behalf of Xxxxxxx Xxxxx Select Institutional Fund hereby joins and agrees to be bound as of the date hereof by the Administration Agreement as a Fund.

ADMINISTRATION FEE

Fund	Percentage of the average daily Net Assets of the Fund
Xxxxxxx Xxxxx Select Institutional Fund	0.13%*

* In exchange for the Administration Fee for the Xxxxxxx Xxxxx Select Institutional Fund, the Administrator agrees to pay all other expenses of the Xxxxxxx Xxxxx Select Institutional Fund, other than the Fund’s pro rata portion of the advisory fee of the Institutional Portfolio, the corresponding “master” portfolio in which the Fund invests all of its assets, payable indirectly by the Fund as a shareholder in the Institutional Portfolio so that the Fund’s total annual operating expenses shall be no greater than 0.18% of the Fund’s net assets. These other expenses include, but are not limited to, all other expenses incurred in the operation of the Fund, including, among other things, taxes, expenses for legal and auditing services, costs of printing proxies, shareholder reports and prospectuses and statements of additional information, charges of the custodian, any sub-custodian and any transfer agent, expenses of portfolio transactions, expenses of redemption of shares, Securities and Exchange Commission fees, expenses of registering the shares under federal, state or non-U.S. laws, fees and actual out-of-pocket expenses of the Trustees of the Trust who are not affiliated persons of the Administrator, or of an affiliate of the Administrator, accounting and pricing costs (including the daily calculation of the net asset value), insurance, interest, brokerage costs and other expenses properly payable. In the event that the Administrator does not pay such expenses of the Xxxxxxx Xxxxx Select Institutional Fund, the Administration Fee shall be automatically reduced by an amount equal to the amount of such expenses not paid by the Administrator.

Acknowledged and Agreed: BLACKROCK ADVISORS, LLC	XXXXXXX XXXXX FUNDS FOR INSTITUTIONS SERIES, on behalf of its series XXXXXXX XXXXX SELECT INSTITUTIONAL FUND
By:	By:
Name:	Name:
Date:	Title: