Figs 6‒8. Distribution of the two principal bumblebee groups. 6. Bumblebee subgenera world-wide as revised (Williams et al. 2008) based on an estimate of phylogeny from five genes (Sanger sequencing, trees estimated using models of DNA-sequence evolution fitted with Bayesian methods: Cameron et al. 2007), updated from estimates from broad genomic data (Illumina sequencing of ca 10 000 genes, trees from maximum likelihood analysis: Sun et al. 2020) and shown as a non-metric tree. Lowland Grassland (LG) group highlighted in green and Montane Grassland (MG) group highlighted in blue. 7. Bumblebee species richness (see Fig. 1) for the Lowland Grassland (LG) group (excluding the subgenus Psithyrus Lepeletier, 1832, with its divergent parasitic habit), showing an example (inset) of Bombus pseudobaicalensis Vogt, 1911, from the grasslands of north-eastern Inner Mongolia (Williams et al. 2022b). 8. Bumblebee species richness (see Fig. 1) for the Montane Grassland (MG) group, showing an example (inset) of Bombus kashmirensis Friese, 1909, from the mountains of the eastern Tibetan plateau (Williams et al. 2022b). Background maps and colour scale of 7 and 8 as in Fig. 1.