Bombus (Thoracobombus) humilis Illiger

An, Jiandong, Williams, Paul H., Zhou, Bingfeng, Miao, Zhengying & Qi, Wenzhong, 2011, The bumblebees of Gansu, Northwest China (Hymenoptera, Apidae), Zootaxa 2865, pp. 1-36 : 12

18. Bombus (Thoracobombus) humilis Illiger

( Fig. 21 )

Apis fulve ʃ cens [ fulvescens ] Schrank, 1802:367. Nomen oblitum ( Williams et al., 2009). Germany.

Bombus humilis Illiger, 1806:171 , holotype worker MNHU examined. Synonymised provisionally with Apis fulvescens Schrank by Warncke (1986). Nomen protectum ( Williams et al., 2009). Germany.

Bombus (Agrobombus) helferanus var. subbaicalensis Vogt, 1911:42 , 54, 10 queen and 1 worker syntypes ZMA examined. Regarded as conspecific with Megabombus humilis (Illiger) by Tkalců (1974a). Russia:?Primorskiy Kray.

Material examined. 55 workers 2 males (IAB).

Distribution in Gansu. Common 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. 21 ); 20 localities between 1113 and 3130 m (IAB).

Distribution in China. Beijing, Hebei, Shanxi, Neimenggu, Sichuan, Shaanxi, Gansu, Ningxia (IAB).

Forage plants. ASTERACEAE : Cirsium leo , Cirsium monocephalum ; FABACEAE : Astragalus bhotanensis ; LAMIACEAE : Caryopteris tangutica , Dracocephalum heterophyllum , Mentha haplocalyx ; RANUNCULACEAE : Clematis tangutica .

Figures

FIGURE 4 – 21. Maps of Gansu showing the recorded presences of the species as black spots with county boundaries shown in grey.