Apiomerus is a genus of conspicuous, brightly colored assassin bugs belonging to the family Reduviidae. The species can be found in the United States ranging into tropical America. The common name bee assassins derives from their frequent habit of sitting and waiting upon flowers and taking bees as prey. The bright colors are aposematic, likely a warning to larger predators that a painful bite can be delivered. Many species of this genus have a sticky resin pad located on their dorsal abdomen. The resin is thought to be derived from plant material and may play a role in defending eggs from predation, especially by ants. The genus consists of about 110 described species.