Posted by Nosferatumyia on 13-12-2021 08:53
#10
Either
Urophora solstitialis or, (45/55%)
U. cuspidata. Carduus vs. Centaurea scabiosa; the latter may be more common in Volga steppes. Otherwise, they differ in tiny details of the ovipositor very apex (see Korneyev & White, 1996, Entomologicheskoe obozrenie)