Cheilosia caerulescens caerulescens (Meigen). A Male, lateral view B, C Thorax of male lateral view, variability of composition of pilosity on scutum D Female, lateral view.

 
 
  Part of: StÃ¥hls 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