Posted by Sundew on 15-08-2022 03:29
#3
Wing base is yellow, so not
C. solstitialis. According to van Veen's Hoverflies of Northwest Europe (
https://books.goo...rysogaster)
C. coemiteriorum (sometimes spelled
cemiteriorum) and
C. basalis are the candidates. According to the broad face I tend to
coemiteriorum. Compare Falk's pictures
https://www.flick...245694458/.
Regards, Sundew