Cheilosia caerulescens caerulescens (Meigen). A Head of male, lateral view B Head of female dorsal view C Antenna of male, lateral view D Antenna of female, lateral view E–G male genitalia, lateral, from left to right: E Cercus+surstylus F Superior lobe G Aedeagal complex.

 
 
  Part of: Ståhls G, Barkalov AV (2017) Taxonomic review of the Palaearctic species of the Cheilosia caerulescens-group (Diptera, Syrphidae). ZooKeys 662: 137-171. https://doi.org/10.3897/zookeys.662.11267