VII BOMBUS LOCORCY 161 
B. lucorum is common over almost the entire 
kingdom, and is especially abundant in the north, 
but there is no record of it from Shetland. In 
the north of Scotland and the Orkney Islands the 
queens are as large as those of ¢errestris. This is 
the variety magnus of Vogt. 
Specimens intermediate between ¢errestris and 
lucorum are occasionally met with; probably most 
of these are hybrids. 
The queens appear in April and May, and the 
colonies are established and mature earlier than the 
majority of those of ¢errestris. The nests are 
almost always under the ground, generally with a 
shorter tunnel than those of ¢errvestris. I once 
found a nest on the surface under a box, and another 
in a stack of straw. The workers number 200 and 
more in populous nests; they are milder tempered 
than those of ¢errestris and seldom attack the dis- 
turber. The comb resembles that of ¢errestrts. 
As the queen grows old, unlike the ¢evvestris queen, 
she loses very little of her hair. 
The differentiation between ¢errvestrzs and luco- 
vum is maintained on the Continent, where /ucorum 
is found more abundantly in the north and in 
mountains. 
