Synonyms and other taxonomic changes
Bibio femorata Wiedemann 1828
Shining black, dense yellow hair, red femora, front tibial spines nearly equal length, anterior veins dark brown, posterior veins light brown, R-M crossvein about equal to base of Rs. Females have dark wings, black along the leading edge if not entirely black.
Most of North America, except Canadian arctic and Western USA.
Females can be confused with a color form of Bibio vestitus.