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Genus Efferia

Pogonioefferia pogonias - Efferia pogonias - female Robber Fly - Efferia tricella Robber Fly ovipositing - Efferia - female Robber Fly w/prey - Efferia aestuans - female Asilidae - Efferia - female Another Guadalupe robber - Efferia - female Machimus occidentalis? - Efferia - male Efferia? - Efferia aestuans - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Superfamily Asiloidea
Family Asilidae (Robber Flies)
Subfamily Asilinae
Genus Efferia
Synonyms and other taxonomic changes
Treated here broadly; species-groups used in the guide are sometimes recognized as separate genera Albibarbefferia, Aridefferia, Carinefferia, Nerax, Pogonioefferia, Tuberculefferia, e.g. in(1)
Explanation of Names
Efferia Coquillett 1893
from Latin efferus 'wild, savage'
Numbers
~110 spp. in our area, 185 total(1)
Size
more or less average in size, 15 to 25-30 mm(2)
Identification
Key to eastern spp.(3)
Range
in our area, the vast majority are restricted to sw. US, with some widely western spp. and just two widespread spp.; Nerax predominantly southeastern(1)
Internet References