Bombus Nemorum (Scopoli, 1763)
For details see Williams Bumblebees of the World
Keys and general biology are found in Sladen (1912), Free & Butler (1959), Alford (1975) and Prŷs-Jones & Corbet (1991). This species is very closely related to the more northerly distributed B. distinguendus and males of the two species can be extremely hard to separate. In Scandinavia it is strongly associated with red clover (Løken 1973). Sladen (1912) also comments upon its close association with this plant.
Although formerly widespread and locally common in southern England, this species has experienced a catastrophic decline during the last fifty years and is now considered likely to have become extinct in Britain. The last confirmed specimens were found at Dungeness during 1988. The species ranges from western Europe eastwards to northern Mongolia. It is known to be declining throughout Europe. It has been introduced to New Zealand as a pollinator of red clover (Trifolium pratense).