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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Asiloidea » Robber Flies (Asilidae) » Asilinae » Efferia » Nerax group (Efferia Nerax group) » Efferia aestuans
Photo#1433119
Robber Fly: Efferia or Promachus? - Efferia aestuans - female
Copyright © 2017 Chris Graycen

Robber Fly: Efferia or Promachus? - Efferia aestuans - Female
Des Moines, Polk County, Iowa, USA
August 21, 2017
Size: Approx 1in
I know this is a Robber Fly (Asilidae) but I was wondering if this specimen belonged to genus Efferia or Promachus.
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Contributed by Chris Graycen on 31 August, 2017 - 1:31pm
Last updated 31 August, 2017 - 11:19pm

Moved
Moved from ID Request.

Pointed abdomen = ♀
If you look closely at the wing tips, the veins are correct for this sub-genera grouping. That and the black mystax, the reddish color on her tibiae, the black patches on her abdomen and the very long ovipositor are all more indicators of this species.
… Bob Biagi, 31 August, 2017 - 11:19pm login or register to post comments

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