Posted by John Carr on 09-05-2011 23:37
#3
Bibio. The strong tibial spurs are distinctive. The female uses them to dig a hole to lay eggs in. On the male they are useless as far as I know.
This is one of two European species that fly late in the year and have swollen hind tarsi in the male --
B. clavipes and
B. lepidus.