Ripiphoridae

The family Ripiphoridae (formerly spelled Rhipiphoridae) is a cosmopolitan group of beetles, commonly known as wedge-shaped beetles, containing some 450 species. Unusual for beetles, many ripiphorids are parasitoids—different groups within the family attack different hosts, but most are associated with bees or vespid wasps, while some others are associated with cockroaches. They often have abbreviated elytra, and branched (flabellate or pectinate) antennae. Genera include Allocinops, Rhipistena and Sharpides.