Wasps and Bees 27 g 



Bombus kirbyellus (Curtis) Franklin. 



Bombus kirbyellu, Franklin. Trans. Amer. Ent. Soc. XXXVUI, p. 291. 



Malb. — 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, CoUinson 

 point, Alaska, July 10, 1914 (F. Johansen); one worker. Young point. North- , 

 west Territories, July 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 froln Bartlett bay, Alaska (lat. 58-26, long. 135-53), 1907 (D. H. Nelles), 

 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 Franklin, 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 CoUinson 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, 

 one of them has no black hairs on the abdomen. The queen from CoUinson 

 point differs from the description in having segment 3 partly black and 

 segment 4 red. 



