Thread subject: Diptera.info :: Chalcosyrphus valgus
Posted by treebeard on 30-05-2022 19:33
To confirm this ID, consider that Ch. valgus should have a long 4th tergite, the abdomen should look longer than in other Chalcosyrphus species, or the species should look slimmer, respectively. Stigma should be quite pale.
Sometimes it is difficult, I have pictures of all these species, but sometimes I am not able to identify a new one.