Pompilidae

Definition

A cosmopolitan family of solitary wasps in the order Hymenoptera, commonly known as spider wasps or spider-hunting wasps. Members typically hunt spiders, paralyzing them with venom to provision underground nests as food for their larvae. The family comprises approximately 5,000 species across six subfamilies, with most species practicing active predation; exceptions include the kleptoparasitic subfamily Ceropalinae, which exploits other pompilids or acts as ectoparasitoids on living spiders.

Etymology

From the type genus Pompilus (Greek pompilos, 'pilot fish' or 'escort', possibly alluding to wasp behavior) + Latin family suffix -idae.

Example

A female Pepsis thisbe (Pompilidae) will track, attack, and sting a tarantula, dragging the paralyzed spider to a burrow where she deposits a single egg; the larva consumes the still-living host.

Synonyms

• Spider wasps
• spider-hunting wasps
• pompilid wasps

Related Terms

• Hymenoptera
• Apocrita
• kleptoparasitism
• ectoparasitoid
• tarantula hawk
• solitary wasp
• paralysis
• host manipulation

Usage Notes

Used as a proper noun in taxonomic contexts; the vernacular 'spider wasp' applies broadly to family members but also risks confusion with certain crabronid wasps (e.g., some Sphecidae sensu lato) that also hunt spiders. Distinguish from Pompiloidea, the superfamily containing Pompilidae. Specialist literature often reserves 'pompilid' as the adjectival form (e.g., 'pompilid venom', 'pompilid biology'). The family's monophyly and subfamily boundaries remain active research areas.