From Wildlife Extra:
Rare bumblebee and critically endangered thistle
September 2011: Rare plant and insect species have been spotted at Kent Wildlife Trust‘s Darland Banks nature reserve close to the Medway towns.
The very unusual sight of a mound of red star-thistles playing host to brown-banded carder bumblebees was recorded by Plantlife project manager Richard Moyse, on a visit to the chalk grassland site last week.
The bumblebees of the subgenus Subterraneobombus: integrating evidence from morphology and DNA barcodes (Hymenoptera, Apidae, Bombus): here.