The distribution of B. melanurus in the West-Palaearctic region is restricted to E. Anatolia, Armenia and N. Iran. Handlirsch (1888) mentions a place "Waga" in the Caucasus, but this toponym has never been localised and the presence of the species in this region was never confirmed. More east, B. melanurus is present in the Alai, the Pamir, Cashmere, the Altai Mts., Inner and Outer Mongolia and central China.
P. Rasmont