Bombus (Megabombus) saltuarius
Bombus saltuarius is found mainly in N. Russia : Arkhangelsk region, Bolshezemelskaya tundra, Pechora basin, north of the Ural Mts., but also in Asia: Sayan Mts. (Siberia) and Gan Su Province (China).
B. saltuarius is the least known of the West-Palaearctic bumblebees. The most recent specimens that the authors could find in museums had been collected before 1928 and we have no information on the present situation of the species. Indeed, the region where it lives was barred by the GULAG to any natural history investigation for more than half a century.