Plecia, Penthetria, Enicoscolus, Bibio, Bibionellus, Dilophus
For range information and other characters used to identify these genera, please see the Key to World Genera of Bibionidae. This is meant to be used as a supplement to the key, but can be used by itself if good angles showing the wing venation are accessible. Thanks!
Bibionidae Wing Venation Comparison.pdf