Bombus ashtoni is found in tropical and temperate zones, most notably in North America, north of Mexico.
Biogeographic Regions: neotropical (Native )
- Carpenter, F. 1997. Pp. 231-239 in McGraw-Hill Encyclopedia of Science and Technology, Vol. 9, 8th Edition. The Lakeside Press: R.R. Donnelley and Sons Company.
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