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Diptera.info :: Family forums :: Asilidae Forum
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Identification confirmation and help
Bob
#1 Print Post
Posted on 08-10-2013 17:40
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Location: Juneau, Alaska
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Joined: 18.06.12

Is this a Robber Fly in the family Asilidae? Any idea on the genera? Photographed in Sitka, Alaska on August 18, 2012.

Thanks,

Bob
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Paul Beuk
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Posted on 08-10-2013 20:32
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bibio sp.
Paul

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John Carr
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Posted on 08-10-2013 21:43
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I think Bibio nigritus Curran, 1924, or Bibio bryanti Johnson, 1929 if that is a distinct species. They used to be synonyms. I have not seen the latest literature on northern Bibio.

The key to North American species (Hardy, 1945) relies on length of inner spurs of fore tibia and r-m crossvein relative to basal section of Rs. Those are not clearly visible. Most guesses lead to dead ends. One leads to a species that matches your photo.

 
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