33. Bombus (Pyrobombus) picipes Richards

(Fig. 36)

Bombus pratorum ssp. flavus Friese, 1905:517 (not of Pérez, 1884:265 = B. campestris (Panzer)), holotype male MNHU examined. ‘Turkestan Kashgar’, believed incorrect.

Bombus (Pratobombus) parthenius var. picipes Richards, 1934:90, holotype worker BMNH examined. Synonymised with Bombus flavus Friese by Tkalců in Sakagami (1972). China: Shaanxi.

Bombus (Pratobombus) klapperichi Pittioni, 1949:266, holotype queen BMNH examined. Synonymised with Bombus flavus Friese by Sakagami (1972). China: Fujian.

Material examined. 20 queens 253 workers 30 males (IAB).

Distribution in Gansu. Abundant at low to medium elevations of the southeastern mountains and eastern loess plateau, rare at medium elevations of the Qinghai-Tibetan plateau in the southwest (Fig. 36); 25 localities between 1113 and 2526 m (IAB).

Distribution in China. Beijing, Tianjin, Hebei, Shanxi, Fujian, Henan, Chongqing, Sichuan, Yunnan, Shaanxi, Gansu, Qinghai, Ningxia (IAB).

Forage plants. ALLIACEAE: Allium fistulosum; ASTERACEAE: Arctium lappa, Cirsium monocephalum, Cosmos bipinnatus, Dahlia pinnata, Helianthus annuus, Saussurea sp., Tagetes patula; BUDDLEJACEAE: Buddleja officinalis; FABACEAE: Astragalus sp., Lespedeza bicolor, Oxytropis ochrocephala, Vicia cracca; LAMIACEAE: Dracocephalum heterophyllum, Nepeta prattii, Phlomis umbrosa; MALVACEAE: Althaea rosea; RANUNCULACEAE: Anemone tomentosa, Clematis tangutica .

34. Bombus (Pyrobombus) infrequens Tkalc ů (Fig. 37)

Pyrobombus (Pyrobombus) infrequens Tkalců, 1989:56, holotype worker BMNH examined. Myanmar.

Material examined. 7 workers (IAB).

Distribution in Gansu. Common at medium elevations of the southeastern mountains and eastern loess plateau (Fig. 37); 2 localities between 1770 and 2225 m (IAB).

Distribution in China. Chongqing, Sichuan, Yunnan, Gansu (IAB).

Forage plants. ASTERACEAE: Cirsium leo; FABACEAE: Melilotus officinalis .