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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Flies (Diptera) » "Orthorrhapha" (Brachycera excluding Aschiza and Schizophora) » Asiloidea » Robber Flies (Asilidae) » Asilinae » Efferia » Nerax group (Efferia Nerax group) » Efferia aestuans
Photo#131678
Robber Fly - Efferia aestuans - female
Copyright © 2007 Bob Moul

Robber Fly - Efferia aestuans - Female
Adams County, Pennsylvania, USA
July 27, 2007
Size: 1"
I believe this is a female of the genus Efferia. Can someone give me the species? It doesn't quite look like aestuans.

Thanks
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Contributed by Bob Moul on 28 July, 2007 - 8:40pm
Last updated 15 August, 2007 - 12:04am

Moved
Moved from Efferia aestuans.
… Chuck Entz, 15 August, 2007 - 12:04am login or register to post comments

Efferia
Beautiful shot. There is one other Nerax group species that might occur in the eastern part of the state near the Appalachians that is Efferia kondratieffi. The ovipostior on the female in that species is less than 4.5 mm long. May be similar otherwise. In the rest of Penn. this can only be E. aestuans.
… Herschel Raney, 28 July, 2007 - 9:04pm login or register to post comments

 
Robber Fly
Thanks Herschel. Female aestuans it is. Appalachians are about 30 miles west of here.
… Bob Moul, 28 July, 2007 - 9:07pm login or register to post comments

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