Wasps and Bees 27 g 
Bombus kirbyellus (Curtis) Franklin. 
Bombus kirbyellu, Franklin. Trans. Amer. Ent. Soc. XXXVIII, p. 291. 
Male. — Eighth ventral segment of abdomen (inner spatha) tridentate 
(see figure). Hair colour pale yellow; black between the antennae, on the inner 
margins of the eyes, on the outer margins of the eyes and on the third segment 
of the abdomen: there is an indistinct black band on the thorax between the 
wings but this is partly bleached, and the fourth to the seventh segments of 
the abdomen are pale red : on the underside the hairs are long, and almost white. 
Length, about 15 mm. 
Worker. — Hair on head black, on thorax black with a. yellow band before 
and behind, pleura pale yellow. Abdomen; segments 1 and 2 yellow, segment 3 
black, segments 4 to 6 dull red; underside with white hairs; legs with long 
largely pale hairs. 
Two males, Nome, Alaska, August 24 to 25, 1916 (F. Johansen); one 
worke'r, Nome, Alaska, August 24-25, 1916 (F. Johansen); one worker, Collinson 
point, Alaska, July 10, 1914 (F. Johansen); one worker, Young point, North- 
west Territories, Julj^ 21, 1916 (this specimen has the hairs on the legs and 
underside black). 
Specimens of B. kirbyellus in the Canadian National Collection include a 
queen from Bartlett bay, Alaska (lat. 58-26, long. 135-53), 1907 (D. H. Nelle§), 
two from Fullerton, Northwest Territories, July, 1904 (A. Halkett), one from 
Nottingham island, Hudson strait, 1886 (J. McKenzie), and one from cape 
Chudleigh, Hudson strait; a worker from Laggan, Alta. (J. Fletcher), and males 
from Banff, Alta. (N. Sanson). 
Bombus polaris (Curtis) Franklin. 
Bombus polaris FrankUn, Trans. Amer. Ent. Soc. XXXVIII, p. 299. 
Male. — Eighth ventral segment tapering to a blunt point, its side margins 
deeply incurved (see figure). Hairs on head black with more or less pale yellow 
on clypeus and vertex. Thorax pale yellow with indistinct interaler black band. 
Abdomen; basal portion pale yellow, apical portion pale red, with more or less 
black on the middle portion. Hairs on underside and legs pale with more or 
less black. Length, 14 to 15 mm. 
Queen and Worker. — Head hairs black. Thorax black, with a broad 
yellow band in front and a narrower one behind, pleura yellow, lower part 
black. Abdomen with segments 1, 2 and 3 yellow; segment 4 black; segments 
5 and 6 red. Length, queen 16 to 19 mm., workers 11 to 13 mm. 
Two males from Nome, Alaska, August 24-25, 1916 (F. Johansen); one 
queen from west of Collinson point, Alaska, June 11, 1914 (E. deK. Leffing- 
well); one worker from Kamarkok, west of Herschel island, Yukon Territory, 
August 3, 1916, and one from Herschel island, near end of July, 1916 (F. 
Johansen) one queen from Bernard harbour, Northwest Territories, July 2, 
1915; two males from Bernard harbour, July 10, 1916 (F. Johansen). The 
males from Bernard harbour have the coat bleached to a considerable extent, 
ona of them has no black hairs on the abdomen. The queen from Collinson 
point differs from the description in having segment 3 partly black and 
segment 4 red. 
