SUPPLEMENTARY NOTES ON THE SOCIAL BEES OF 
THE PHILIPPINE ISLANDS 
By T. D. A. COCKERELL 
Of the University of Colorado 
The discovery of a new species of Bombus on Negros Island 
is an event of considerable interest; and it is very satisfactory 
to obtain a new variety from Luzon, with the hitherto unknown 
male of B. irisanensis. 
Bombus irisanensis Cockerell var. baguionensis var. nov. 
The workers differ from the original description in having 
the fifth segment of abdomen in middle or right across, and the 
sixth, with long pale fulvous hair instead of black. The male 
has the hair of apical part of the abdomen black, as in the 
type. The clypeus of the male is covered with ocherous hair, 
and the third antennal joint is a trifle shorter than the fourth, 
the two together being scarcely longer than the fifth. The an- 
terior wing of the male is about 16.5 millimeters long; the 
expanse, about 41. The first two abdominal segments in the 
workers have the hair pale fulvous or ochraceous; in the male 
it is darker, on the second segment almost a seal brown. In 
the male the hair of the legs is black, but in the workers the 
tibiz have long fulvous hair, sometimes partly dark. It seems 
best, on account- of the numerous differences, to distinguish 
this form as variety baguionensis, but it remains to be seen 
whether the Irisan type is racially distinct, or was described 
from a peculiarly colored individual. The type of the variety 
is a worker with fifth abdominal all pale haired, and the hind 
tibiz and tarsi red. (Baker 11841.) The third antennal joint 
is distinctly longer than the fifth. 
LUZON, Benguet, Baguio (Baker 11840, 11841, 11842), 1 
male and 3 workers. 
Bombus bakeri sp. nov. 
Female.—Length, about 22 millimeters; anterior wing, 13.5; 
black, robust, very hairy; anterior and middle tibie and tarsi 
dark reddish, hind tibize and tarsi clear ferruginous; malar 
space about as broad as long; labrum bigibbous, fringed with 
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