17. Bombus (Thoracobombus) deuteronymus Schulz

(Fig. 20)

Bombus senilis Smith, 1879:131, holotype queen BMNH examined (not of Fabricius, 1775:382, = B. pascuorum (Scopoli)) . Japan.

Bombus deuteronymus Schulz, 1906:267, replacement name for senilis Smith, 1879:131 .

Material examined. 19 workers 2 males (IAB).

Distribution in Gansu. Common at medium elevations of the Qinghai-Tibetan plateau in the southwest (Fig. 20); 3 localities between 2835 and 2872 m (IAB).

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

Forage plants. ASTERACEAE: Cirsium leo, Saussurea sp., Sinacalia tangutica; CAMPANULACEAE: Adenophora potaninii; FABACEAE: Astragalus bhotanensis, Lespedeza floribunda, Melilotus officinalis; LAMIACEAE: Caryopteris tangutica, Dracocephalum heterophyllum; RANUNCULACEAE: Aconitum gymnandrum .