The “killer bees” seemed to be moving north. Recent evidence, according to Kansas University expert Orley Taylor, had put the bees on schedule for an unwelcome appearance on the southern U.S. border in 1988. Sometime that year, a swarm of African honeybees was due to reach the Brownsville, Tex., area in large numbers, Taylor said. He said the bees were termed “killers” because a series of their stings had been fatal to some animals.