Paul Beuk wrote:
Hmm, reminds me of
Cheilosia caerulescens of which you can find some poor pictures
here. Mind you, these pictures were to demonstrate the oviposition on
Sempervivum, not to provide a detailed view of the species.
Especially the silvery hairs are conspicuous.
Thanks a lot (and thanks for moving the thread to the Syrphidae forum).