---

Hello,

check this key:

Barkalov, A. V., Stahls, G. (1997): Revision of the Palaearctic bare-eyed and blacklegged species of the genus Cheilosia Meigen (Diptera, Syrphidae).-Acta Zoológica
Fennica 208,1-74. Helsinki. ISSN 0001-7299. (