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Hello! I caught this one today. I can’t decide between three species:
- Cheilosia frontalis
- Cheilosia aerea
- Cheilosia melanura.

Cheilosia melanura has bristles on the wing, in the place, where r2+3 and r4+5 aren’t separated. In my specimen these bristles are present as well. I don’t know anything about if frontalis and aerea have these bristles, or no. My key writes something about hairs face, but I can’t understand it really. And I don’t know how could we exclude the third species. Could you help me please? Which species is this?