Efferia

Efferia
	Efferia deserti male in side view
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Diptera
Suborder:	Brachycera
Superfamily:	Asiloidea
Family:	Asilidae
Subfamily:	Asilinae
Genus:	Efferia; Coquillet, 1893
Type species
	Efferia candida; Coquillet, 1893
Species
	over 240, see text
Synonyms
	Nerax Hull, 1962, TS: Asilus aestuans Linnaeus (orig. des.); Erax of authors, not Scopoli.;

Efferia is an insect genus of mainly neotropical and nearctic Diptera in the family Asilidae or robber flies. It is one of the most species-rich genera of Asilidae, with particularly high diversity in arid or semi-arid ecosystems of the New World.

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