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Genus Bibio

Unidentified - Bibio longipes fly - Bibio March Fly - Bibio - female March Fly - Bibio - male March Fly - Bibio marci? - Bibio March Fly - Bibio - male March Fly - Bibionidae - Bibio - female ID help please - Bibio femoratus - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Nematocera" (Non-Brachycera))
Infraorder Bibionomorpha
Family Bibionidae (March Flies)
Genus Bibio
Numbers
Nearctica lists 53 species.
Identification
See comments here for Paul Beuk's take on genus identification.

Wing venation:
Food
Larvae are scavengers on roots and decaying plant material.
Internet References