Ascalaphidae

Definition

A family of predatory insects in the order Neuroptera, commonly called owlflies, comprising approximately 450 extant species. Adults are fast-flying crepuscular or diurnal hunters with large, bulging compound eyes and strongly clubbed antennae; larvae are ambush predators, some employing self-decoration camouflage with debris. The family is placed in the suborder Myrmeleontiformia and superfamily Myrmeleontoidea, with recognized subfamilies including Ascalaphinae, Albardiinae, and Haplogleniinae.

Etymology

From Ascalaphus (type genus, from Greek Askalaphos, a mythological figure) + -idae (family suffix)

Example

Adult Ascalaphidae such as Ululodes quadrimaculatus perch with wings folded tent-like over the body, resembling dragonflies but distinguished by their clubbed antennae; their larvae excavate shallow pits in soil or occupy tree holes to ambush passing prey.

Synonyms

• owlflies (common name)

Related Terms

• Neuroptera
• Myrmeleontidae
• Mantispidae
• Raphidioptera
• Crepuscular
• antennal club

Usage Notes

Distinguished from superficially similar dragonflies (Odonata) by the clubbed antennae and wing venation; from antlions (Myrmeleontidae, same superfamily) by adult eye size and larval behavior—ascalaphid larvae are mobile ambush predators rather than pit-diggers. The family is sometimes split into two families (Ascalaphidae sensu stricto and Haplogleniidae) in some classifications, though most current treatments retain a single family with subfamilies.