Thread subject: Diptera.info :: Chalcosyrphus valgus
Posted by Sundew on 30-05-2022 20:12
Interesting - differences in tergite length are not mentioned in the keys I know.
Here is a nice picture of a C. femoratus
. The pale haltere knob is striking, and the arista that is darker than the orange basoflagellomere is well seen. Also the large, triangular flange at the apex of the hind tibia is visible.
I consider your female C. valgus
Best wishes, Sundew
PS. Did you get my Syrphidae paper that I sent you via e-mail?