(subclass Pterygota, order Coleoptera)
Family of black or brown beetles, often with a yellow pattern, 3–30 mm long, in which the body is humped and tapered, frequently with reduced elytra; some females lack wings or elytra. The head is constricted immediately behind the eyes. Males have large, fan-shaped antennae. Larvae are minute; all are insect parasites. There are 250 species.
Subjects: Zoology and Animal Sciences.