Brasiliensis (Smith, 1854[Apathus]) nec Lepeletier, :470 (= B. brasiliensis Lepeletier); Bombus citrinus (Schmiedeknecht, 1883)
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). Until recently this species was known as Psithyrus sylvestris, but Psithyrus has now been reduced to a sub-genus within Bombus. The bee bears little clear resemblance to any of its probable host species in the Bombus pratorum group.
This species is distributed widely throughout most of the area covered by this Atlas, but is rarely common. There are no records from Ireland. It is widespread in Europe; middle and northern latitudes of Asia, eastwards to Kamchatka and Korea (Løken 1973).