Species Bombus morrisoni - Morrison's Bumble Bee

Honors Herbert Knowled Morrison (1854-1885) who made pioneering entomological expeditions to the mountains of the Western United States in the 1870s and early 1880s. His bumble bees were studied and described by Ezra T. Cresson. He was among the first to collect bees in what are now the southwestern states.

Resembles B. nevadensis but in morrisoni the coat is a brighter more golden (less brown) hue, the vertex has more extensive yellow hairs, and the scutum is uniformly covered in yellow hairs without a conspicuous medial spot. The eyes of morrisoni are enlarged but less so than in nevadensis. Also resembles its relative B. griseocollis, but yellow tergal hairs extend to T3.

Western North America, especially the Great Basin region and Southwestern mountains and canyons

The Hosts section of its Discover Life species page lists known associations based on specimen records and images.

**Listed as Vulnerable by the IUCN Red List of Threatened Species**

Commonly found in the past at the Southwestern Research Station in SE Arizona, but not present in recent years

Link to photos of male genitalia (Natural History Museum, UK)