Cerceris is a genus of wasps in the family Crabronidae. It is the largest genus in the family, with over 850 described species. The genus has a cosmopolitan distribution, with species on every continent. The adult female Cerceris wasp generally digs a nest in the soil and provisions it with living prey items she has paralyzed with venom. The prey are usually beetles, and sometimes bees. Many Cerceris are solitary, but some species share nesting sites or nest communally.