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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Asiloidea » Robber Flies (Asilidae) » Asilinae » Hammertails (Efferia) » Nerax group (Efferia Nerax group) » Eastern Hammertail (Efferia aestuans)
Photo#211625
Robber Fly - Efferia aestuans - Efferia aestuans - female
Copyright © 2008 John F. Carr

Robber Fly - Efferia aestuans - Efferia aestuans - Female
Burlington, Middlesex County, Massachusetts, USA
August 8, 2008
Size: 15mm
Length is 15mm excluding what I presume is a long ovipositor. She seems to be eating; closeup to follow.

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Robber Fly - Efferia aestuans - Efferia aestuans - female Head shot - Efferia aestuans - female Robber Fly - Efferia aestuans - female
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Contributed by John F. Carr on 8 August, 2008 - 8:06pm
Last updated 3 November, 2009 - 9:17am

Moved
Moved from Asilinae.
… norman and cheryl lavers, 3 November, 2009 - 9:17am login or register to post comments

Moved
Moved from Robber Flies. Keys to Asilini, either Efferia or Promachus. Only the former genus is recorded from Massachusetts here.
… John F. Carr, 21 October, 2008 - 8:46pm login or register to post comments

Not positive
but it reminds me of Efferia.
… Jon M. Yuschock, 8 August, 2008 - 11:32pm login or register to post comments

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