Posted by
Sundew on 07-07-2020 02:15
#4
My guess is
Orthonevra (see
https://diptera.i...;pid=70318). There are species with such long and narrow 3rd antennal segments. Similar metallic syrphids (
Riponnensia, Lejogaster) have different antennae. However, I am absolutely no expert in tribe Chrysogastrini!
Regards, Sundew