---

Hello Volker, I think it's a female Callicera aurata:
- Length antennal segment 2≈1, 3≈1+2
- Female femora extensively black
- Tarsal segments 3-5 black (all legs)
- Hairs on posterior margin of scutellum distinctly shorter than scutellum

from van Veen (2010): Hoverflies of Northwest Europe