/y^ 



360 AMERICAN HYMENOPTERA. 



Wings. — Moderately stained with brown. 



Legs. — Hind coxae with some yellow hair on their outer sides ; tro- 

 chanters, and usually the very bases of the femora also, with yellow pile 

 on their lower sides ; femora and tibiae mostly black, the corbicular 

 fringes sometimes with a slight ferruginous tinge. 



Worker and male unknown. 



Dimensions . — Length, 13 mm. to 15 mm. ; spread of wings, 30 mm. 

 to 32 mm. ; width of abdomen at second segment, 8 mm. 



Redescribed from nine specimens, all from Canada (Lab- 

 rador, Isle Royale in Lake Superior, mountains east of Cod- 

 roy and Bay of Islands in Newfoundland, Nepigon in Ontario 

 and Anticosti Island). It is apparently a strictly Boreal 

 form and rather rare. 



This species appears to be very closely related to B. 

 frigidiis, and it seems quite possible that extensive collect- 

 ing will prove that it should be considered either a sub- 

 species or color variant of that species. The two species, 

 as far as I have been able to see specimens, may be readily 

 separated by the difference in the color of their corbicular 

 fringes. This species, to some extent, forms a connecting 

 link between frigidus and bolsteri, but it has a distinctly 

 shorter malar space than does the latter of those two species. 



Bombus (Bonibus) frigidus F. Sm. 



II Bombus derhamellusW. Kirby, Faun. Bor.-Amer., IV, 1837, p. 273, n. 

 380, 9 (misidentification). 

 frigidus Smith, Catal. Hymen. Brit. Mus., II, 1854, p. 399, n. 



54, 9 c?. 

 carriei Greene, Ann. Lye. Nat. Hist. N. Y., VII, 1860, p. 170, 

 n. 2, 9, p. 175. 

 frigidus Cresson, Proc. Ent. Soc. Phila., II, 1863, p. 100, n. 25, 

 9 a (not the cf ). 

 derhamellus Cresson, Proc. Ent. Soc. Phila., II, 1863, p. 108. 

 " Bethune (Reprint W. Kirby's Faun. Bor.-Amer.), 



Can. Ent., X, 1878, p. 118. 

 Cresson, Trans. Amer. Ent. Soc, VII, 1879, p. 

 231. (Catal.). 

 frigidus Cresson, Trans. Amer. Ent. Soc, VII, 1879, p. 231. 



(Catal.). 

 derhamellus Cresson, Syn. Hym. No. Amer., 1887, p. 307. 



(Catal.). 

 frigidus Cresson, Syn. Hym. No. Amer., 1887, p. 307. (Catal.). 



