The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

  • 1. National Biodiversity Network Species Dictionary (January2004) http://www.nhm.ac.uk/nbnhttp://www.nhm.ac.uk/nbn External link.
  • 2. Prys-Jones, O.E. (2004) Pers. comm.
  • 2006. website, Bombus - bumblebees of the world
  • 2008. manuscript, World Bee Checklist Project - update 2008-09
  • 3. Natural History Museum Bombus (January 2004) http://www.nhm.ac.uk/entomology/bombus/ps.htmlhttp://www.nhm.ac.uk/entomology/bombus/ps.html External link.
  • 4. Prys-Jones, O. E. and Corbet, S. A. (1991) Bumblebees. Naturalists’ Handbooks 6. Richmond Publishing Co. Ltd., Slough.
  • 5. The Natural History Museum’s Bombus site- Bombus vestalis http://www.nhm.ac.uk/entomology/bombus/ps.html#vestalishttp://www.nhm.ac.uk/entomology/bombus/ps.html#vestalis External link.
  • 6. The Bumblebee Working Group (2003) Help save the bumblebee…get more buzz from your garden. English Nature, Peterborough.
  • 7. Free, J.B. and Butler, C.G. (1959) Bumblebees. New Naturalist, Collins.
  • Psithyrus vestalis
  • Ruggiero M. (project leader), Ascher J. et al. (2013). ITIS Bees: World Bee Checklist (version Sep 2009). In: Species 2000 & ITIS Catalogue of Life, 11th March 2013 (Roskov Y., Kunze T., Paglinawan L., Orrell T., Nicolson D., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Hernandez F., De Wever A., eds). Digital resource at www.catalogueoflife.org/col/. Species 2000: Reading, UK.
  • Williams, P. H. 1998. 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
  • Williams, P. H. 1998. 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. 79-152

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