Auteur(s)	Williams, P. H.
Jaar	1998
Titel	An annotated checklist of bumble bees with an analysis of patterns of description (Hymenoptera: Apidae, Bombini) Bulletin of the Natural History Museum (Entomology), vol. 67, no. 1 pp 79-152

• Bombus (Megabombus) hortorum
• Bombus (Pyrobombus) hypnorum
• Bombus (Thoracobombus) mucidus