Chalcosyrphus (Chalcosyrphus) tuberculifemur (Stackelberg)
Diagnostic description:
Chalcosyrphus (Chalcosyrphus) tuberculifemur (Stackelberg, 1963).
Stackelberg, A.A. (1963) Neue palaarktische Syrphiden-Arten (Diptera). Stuttgarter Beiträge zur Naturkunde 113, 1-6.
Distribution:
Species described from Sverdlovsk Province, Russia.