Cheilosia grossa
Cheilosia grossa is a widespread European species of hoverfly. Adults can be found in spring on sallow catkins and the larvae tunnel in the stems of various thistle species.
Description
For terms see Morphology of DipteraThe wing length is 8·5-11·75 mm. Differs from Cheilosia chrysocoma in these characters. Segment 3 of antennae brown to black. Pubescence foxy-tawny. All tarsi segments black.