 The adults drink nectar from flowers and neither they nor the larvae are dangerous or harmful to humans.Before 1939, the Evaniidae were a "wastebin taxon" for any parasitic wasp with unusual morphology.Among these were the more apomorphic and less diverse (but about equally speciose) taxa now placed in the Aulacidae and Gasteruptiidae, which together with ensign wasps make up the superfamily Evanioidea.