Late-season-emergence
Guides
Dilophus serotinus
March fly
Dilophus serotinus is a species of march fly in the family Bibionidae, first described by Loew in 1861. Like other members of the genus Dilophus, adults are typically smaller and less robust than related Bibio species, often with reddish coloration. The genus is characterized by a ring of shorter teeth on the front legs rather than the long spurs found in Bibio. As with other bibionids, larvae develop in soil and feed on decaying organic matter.