MAY <MA> WON'T BUY ALLIED'S DEY BROTHERS STORES May Department Stores Co said it terminated an agreement with Allied Stores Corp to buy from Allied the four Dey Brothers Stores in Syracuse, N.Y. May and Allied said conditions necessary for the closing were not met. May had planned to make the acquisition an expansion of its Sibley's Department Store Co, which operates in Syracuse, Rochester and Buffalo, N.Y.