Posted by eklans on 25-03-2022 13:22
#4
Hi Jessica, it's one of the species with meron glossy in posterior half and pruinose in anterior half, and katepisternum also partly shining and without pruinosity. Adult thoracica differs by having a dark spot at the tip of vein R2+3 and lacking a milky-white patch beyond this.
This info + key + figures may be found in The Sepsidae (Diptera) of Europe (Pont, Meier):
https://www.resea..._of_Europe