Bombus vosnesenskii, m, face, Mariposa, CA
More black bumble bees from Yosemite National Park. Here is the male of Bombus vosnesenskii. This species was described by the relatively prolific Polish Taxonomist Oktawiusz Wincenty Bourmeister-Radoszkowski who pumped out a great many new descriptions of bees in many parts of the world. This was the era on both continents when military men did a lot of the natural history and our Polish friend was one of those, apparently entirely in the Russian army. He worked on taxonomy until his death (which is a given for taxonomists).
Beauty is truth, truth beauty - that is all
Ye know on earth and all ye need to know
" Ode on a Grecian Urn"
John Keats. Original public domain image from Flickr