Charles,

The Dictionary entry:- Bombus (Pyrobombus) hypnorum, (Linnaeus, 1758) - NHMSYS0000875501 - insect - hymenopteran, needs a couple of English / Common Names adding - these being:

- Tree Bumblebee

and

- New Garden Bumblebee

See over at:  http://en.wikipedia.org/wiki/Bombus_hypnorum  and over at:  http://www.bioimages.org.uk/html/t147561.htm

Steve