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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Asiloidea » Robber Flies (Asilidae) » Asilinae » Giant Robber Flies (Promachus) » Promachus vertebratus
Photo#20156
Robber Fly - Promachus vertebratus - female
Copyright © 2005 john and jane balaban

Robber Fly - Promachus vertebratus - Female
Scuppernong Prairie, Kettle Moraine State Forest, nr Palmyra, Jefferson County, Wisconsin, USA
August 16, 2002
Still clueless..
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Contributed by john and jane balaban on 13 June, 2005 - 6:34pm
Last updated 15 September, 2008 - 7:54am

Moved
Moved from Giant Robber Flies.
… Herschel Raney, 15 September, 2008 - 7:54am login or register to post comments

Oviposting robber
Hard to see the structure of the ovipositing tip but the face and eye structure are wrong for Efferia. Looks more like a Promachus or Proctacanthus. Wisconsin is in the border zone for some of the western species in these groups. Does not appear to be our common eastern species.
… Herschel Raney, 14 June, 2005 - 3:44pm login or register to post comments

Female ovipositing.
I still have a hard time telling the genera apart myself, but this is definitely a female ovipositing. Probably genus Efferia.
… Eric R. Eaton, 13 June, 2005 - 7:09pm login or register to post comments

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