Thread subject: :: 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 female: https://www.galer..._rouge.jpg. 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?