For over thirty years, Africanized honey bees have been expanding their range in the Americas. In 1990, a swarm of Africanized honey bees was found in Hildago, Texas, near the Mexican border. This range expansion has continued and now Africanized honey bees occupy much of south Texas. In 1993 we expect that the expanding populations will reach the states of Louisiana and New Mexico, and perhaps Arizona and California. Just what the geographical distribution of feral Africanized bee populations will be in North America is a matter of conjecture.