15. Bombus (Thoracobombus) filchnerae Vogt

(Fig. 18)

Bombus Filchnerae Vogt, 1908:100, lectotype worker (Tkalců, 1974a:39) MNHU examined. China: Gansu. Agrabombus adventor Skorikov, 1914:119, type not seen. Synonymised with Megabombus filchnerae (Vogt) by Tkalců (1974a). Mongolia.

Bombus (Agrobombus) lii Tkalců, 1961:355, type not seen. Synonymised with Megabombus filchnerae (Vogt) by Tkalců (1974a). China: Qinghai.

Material examined. 19 queens 37 workers 2 males (IAB).

Distribution in Gansu. Common at medium elevations of the northwestern Qilianshan mountains and low to medium elevations of the eastern loess plateau, rare at medium elevations of the western mountains (Fig. 18); 8 localities between 1423 and 2659 m (IAB).

Distribution in China. Hebei, Shanxi, Neimenggu, Gansu, Qinghai, Ningxia (IAB).

Forage plants. ASTERACEAE: Ligularia sagitta, Olgaea tangutica .