---

Characters like number of bristles, colour and shape of antennae, color and length of hairs on abdomen of many Cheilosia females is variable, but. e.g. tibiae almost without dark ring (as visible on your pictures), even being also a bit variable, is not really so common in Cheilosia. Most females of Cheilosia urbana (having longer hairs on eyes, generally early spring species, smaller) and some of C. frontalis (generally with some hairs on the face, smaller) have it - but it is in my opinion not what's on your pictures.

You could also consider C. psilophthalma. Its females are generally a bit smaller than 8mm and have longer hairs on eyes, but who knows. Check claws.

R.