March Flies

Family Bibionidae

March Flies range from 2 to 15 mm in length.  The dorsum of their thorax is orange, black, or orange and black.  Females have small eyes, while males are holoptic.  Wings range from hyaline to cloudy to black; often each wing bears a pterostigma (Fitzgerald, in Brown et al., 2010). 

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Bibio femoratus
Bibio longipes
Bibio sp. (West Virginia)
Bibio sp. (Panama)
Bibio townesi
Dilophus sp.

American Insects site