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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Asiloidea » Robber Flies (Asilidae) » Dasypogoninae » Lestomyia
Photo#380520
Unknown Asilid from California - Lestomyia
Copyright © 2010 Ken-ichi Ueda

Unknown Asilid from California - Lestomyia
Las Trampas Regional Wilderness, Contra Costa County, California, USA
March 28, 2010
Size: 1 cm
There were many, many robber flies along this stretch of scrubby trail in Las Trampas, and the ones that I could glimpse seemed to have caught wasps. If I go by Powell and Hogue's California Insects, I guess this is Stenopogon, Machinus, or Efferia, but the pics of many other genera look very similar. Not sure what diagnostic features I should be looking for. Leg color? Hair counts?
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Contributed by Ken-ichi Ueda on 30 March, 2010 - 1:26am
Last updated 12 April, 2010 - 4:24pm

Moved
Moved from Robber Flies.
… Ken-ichi Ueda, 12 April, 2010 - 4:24pm login or register to post comments

Pretty distinctive
Leg colors and notable antenna. It is not Machimus or Efferia, both in the big Asilinae group. And it is not a Stenopogon. But 10mm and flying in March with those characters should eliminate quite a few robbers for Dr. Fisher. I doubt he has seen it yet.
… Herschel Raney, 31 March, 2010 - 12:18pm login or register to post comments

 
Lestomyia sp., probably a fem
Lestomyia sp., probably a female.
… Eric Fisher, 12 April, 2010 - 1:16pm login or register to post comments

 
Thanks!
I will move it momentarily. Any particular features that mark this as Lestomyia, other than the fact that it was flying in March and perching on the ground?
… Ken-ichi Ueda, 12 April, 2010 - 4:24pm login or register to post comments

 
Ken-ichi: mainly the 'look' (
Ken-ichi: mainly the 'look' (gestahlt, jizz) in this photo (can't see any really diagnostic features). The shape of the flagellum (ovate), strong dorsocentrals & leg color are characteristic of the majority of species in this genus.

Eric
… Eric Fisher, 12 April, 2010 - 7:43pm login or register to post comments

Can't help with the ID
but I would like to compliment the photo, great shot.
… Tim Lethbridge, 30 March, 2010 - 10:48am login or register to post comments

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