Bombus (Thoracobombus) pseudobaicalensis Vogt

An, Jiandong, Huang, Jiaxing, Shao, Youquan, Zhang, Shiwen, Wang, Biao, Liu, Xinyu, Wu, Jie & Williams, Paul H., 2014, The bumblebees of North China (Apidae, Bombus Latreille), Zootaxa 3830 (1), pp. 1-89 : 41

29. Bombus (Thoracobombus) pseudobaicalensis Vogt

( Figs 60, 61 )

Bombus (Agrobombus) Pseudobaicalensis Vogt, 1911:43 , 53. Agrobombus gilvus Skorikov, 1926:117 .

Material examined. 27 workers, 44 males (IAB).

Distribution in North China. Only in the northeast of Neimenggu. Common at low elevations of the northernmost Great Khingan mountains in Genhe, and the Nenjiang river valley in Elunchun, northeastern Neimenggu. Rare at low elevations of the south Great Khingan mountains in Eerguna, Yakeshi and Aershan in northeastern Neimenggu, and at low elevations of the Bashang plateau in Kalaqinqi, Neimenggu. 17 localities ( Fig. 60 ) between 215–855 m (IAB).

Similar species in North China. This species is very similar in its grey colour pattern to B. deuteronymus and B. humilis (see the key; Figs 51 , 53 , 61 ).

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

Forage plants. ASTERACEAE : Cirsium setosum , Cosmos bipinnatus , Helianthus annuus , H. tuberosus , Serratula coronata ; FABACEAE : Vicia cracca ; LAMIACEAE : Elsholtzia densa ; ONAGRACEAE : Chamerion angustifolium ; POLYGONACEAE : Fagopyrum esculentum ; RANUNCULACEAE : Aconitum kusnezoffii ; ROSACEAE : Sorbaria sorbifolia , Spiraea salicifolia ; TROPAEOLACEAE : Tropaeolum majus .

Figures

FIGURES 60 – 61. 60. Map showing the distribution of B. pseudobaicalensis in North China with records as black spots, the province boundaries in dark grey, and all sites with records of all bumblebee species in light grey. 61. B. pseudobaicalensis worker from Neimenggu.

FIGURE 51. B. deuteronymus worker visiting Cirsium leo (Asteraceae) in Gansu (PW).

FIGURES 52 – 53. 52. Map showing the distribution of B. humilis in North China with records as black spots, the province boundaries in dark grey, and all sites with records of all bumblebee species in light grey. 53. B. humilis worker visiting Trifolium pratense (Fabaceae) in Shaanxi.