FLOYD B. MCKISSICK, a longtime civil rights lawyer and former director of the Congress of Racial Equality, died Sunday in Durham, N.C., at age 69 . . . DARTS FIRED from an electric stun gun at motorist Rodney King were thrown away and can't be used as evidence against four Los Angeles officers charged with beating him, authorities said. Pacifica Hospital records indicate the darts were thrown out the night of the beating, district attorney's spokesman Mike Botula said Sunday . . . TWO COAST GUARD cutters rescued 426 Haitian refugees that were jammed aboard two small sailboats off southeastern Florida, a Coast Guard spokesman said Monday.