21. Bombus (Thoracobombus) muscorum (Linnaeus)

(Figs 44, 45)

Apis Mucorum [ muscorum] Linnaeus, 1758:579.

Material examined. 1 worker, 2 males (IAB).

Distribution in North China. Rare at low elevations of the Hulunbeir grasslands and the Nenjiang river valley in northeastern Neimenggu. 3 localities (Fig. 44) between 315–678 m (IAB).

Similar species in North China. This species is very similar in its orange-brown colour pattern to some B. laesus, B. tricornis and B. atripes (see the key; Figs 41, 45, 69, 71)

Distribution in China. Neimenggu, Heilongjiang, Xinjiang (IAB).

Forage plants. ASTERACEAE: Helianthus annuus; ONAGRACEAE: Chamerion angustifolium .