Bombus (Thoracobombus) tricornis Radoszkowski

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 : 44-45

33. Bombus (Thoracobombus) tricornis Radoszkowski

( Figs 68, 69 )

Bombus tricornis Radoszkowski, 1888:319 .

Material examined. 1 queen (IAB).

Distribution in North China. Rare at medium elevations of the Songshan nature reserve of the Yanshan mountains in northern Beijing. 1 locality ( Fig. 68 ) at 1590 m (IAB).

Similar species in North China. This species is similar in its brown colour pattern to B. pascuorum , schrencki , B. hedini and B. atripes (see the key; Figs 55 , 57 , 59, 69, 71).

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

Forage plants. LAMIACEAE : Vitex negundo .

Figures

FIGURES 68 – 69. 68. Map showing the distribution of B. tricornis in North China with record as black spot, the province boundaries in dark grey, and all sites with records of all bumblebee species in light grey. 69. B. tricornis queen from Beijing.

FIGURES 54 – 55. 54. Map showing the distribution of B. pascuorum 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. 55. B. pascuorum worker visiting Serratula coronata (Asteraceae) in Neimenggu.

FIGURES 56 – 57. 56. Map showing the distribution of B. schrencki 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. 57. B. schrencki male visting Serratula coronata (Asteraceae) in Neimenggu (PW).