160 THE HUMBLE-BEE VIII 
3. BOMBUS LUCORUM, Linnzus. 
Small Earth Humble-bee. 
Closely related to B. terrestris. 
QUEEN.—Slightly smaller than Zerres/vis ; length 19-20 
mm., expanse 36-39 mm. 
Resembles Zervestrzs, but the yellow bands are of a lemon 
tint and the tail is white. The yellow bands are less 
inclined to melanism than in the case of ¢errestrzs. 
WoORKER.—Length 11-17 mm. 
Differs from the queen only in size. Distinguishable 
from ferrestrzs worker by the pure white tail. 
MALE.—Length 14-16 mm., expanse 30-33 mm. 
The colouring may be described as that of ¢errestris, 
with the yellow paler and more widespread, and with the 
tail pure white instead of tawny-white. 
Hairs on the face and on the top of the head lemon- 
yellow. Thorax with a broad lemon-yellow band in front, 
and a narrower, more or less indefinite band of the same 
colour or of whitish behind, the space between the bands 
being black, more or less suffused with white or lemon. 
The abdomen in the majority of specimens has the Ist 
and 2nd segments lemon-yellow, with the 3rd and part of 
the 4th segments black, but in the yellowest specimens 
the first four segments are lemon-yellow, with only a black 
band on the 4th segment; the white of the tail, which 
usually commences on the 4th segment, shows no tendency 
to tawniness. 
The black hairs are often mixed with white or white- 
tipped hairs, and there are sometimes narrow white bands 
on the 3rd and 4th segments. 
Dark specimens are coloured almost like Zerrestrzs, 
but the tail remains pure white. 
The coat is longer and less even than in ¢errestrzs. 
Antenne short as in ¢errestrzs; length of flagellum 
5 mm. 
Armature almost identical with that of terrestres. 
