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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Nematocera" (Non-Brachycera) » Gnats, Gall Midges, and March Flies (Bibionomorpha) » March Flies (Bibionidae) » Dilophus » strigilatus, stigmaterus, occipitalis, tibialis, proximus, sectus, caurinus, obesulus, or emarginatus males (Dilophus strigilatus, stigmaterus, occipitalis, tibialis, proximus, sectus, caurinus, obesulus, or emarginatus males)
Photo#665275
Bibio sp.? - Dilophus - male
Copyright © 2012 Gordon Preecs gpreecs@gci.net

Bibio sp.? - Dilophus - Male
Juneau, Alaska, USA
June 19, 2012
Enormous emergence of adults in Juneau AK. Residents curious - would like species ID if possible.

Found with:

tag · login or register to post comments
Contributed by Derek Sikes on 28 June, 2012 - 7:37pm
Last updated 10 January, 2023 - 1:24pm

Moved
Moved from Dilophus.
… Even Dankowicz, 10 January, 2023 - 1:25pm login or register to post comments

Likely Dilophus tibialis
Key in Hardy (1945) (University of Kansas Science Bulletin 30:498).

The female keys to a group of indistinguishable species. The photo of the male isn't clear enough, and the key relies on genital characters.

The most likely species is Dilophus tibialis of which Hardy writes "Type locality: Sitka, Alaska. This species is very abundant in the North. Specimens have been examined from numerous localities in the following possessions, states and provinces: Alaska, Alberta, British Columbia, California, Idaho, Manitoba, Michigan, Minnesota, Montana, Ontario, Oregon, Quebec, South Dakota, Utah, Washington and Wisconsin."
… John F. Carr, 28 June, 2012 - 8:54pm login or register to post comments

Moved
Moved from ID Request.
… John F. Carr, 28 June, 2012 - 8:46pm login or register to post comments

I unlinked your images...
...as linking is reserved for pics of the same individual. I've cross referenced them with thumbnails in the Remarks section, though.
… Ken Wolgemuth, 28 June, 2012 - 7:59pm login or register to post comments

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