36 THE CANADIAN ENTOMOLO< 



the upper fifth) all cream coloured ; no supraclypeal mark ; mandibles 

 simple ; labium with the upper third cream-colour, the rest ferruginous ; 

 lateral marks ending about the upper level of the antennal sockets, but 

 there is a short reddish-yellow stripe higher up near the eye, and a minute 

 dot at the summit ; scape bright ferruginous, not much swollen ; flagellum 

 stout, dark fuscous above and bright ferruginous beneath ; third antennal 

 joint conspicuously longer than fourth. Mesothorax and metathorax 

 entirely black, the base of the latter dull and granular ; upper margin of 

 prothorax, tubercles, teguhw, large irregular mark on pleura, scutellum and 

 postscutellum, all cream colour ; wings clear, stigma ferruginous, nervures 

 fuscous ; first r. n. reaching second s. m. beyond middle ; b. n. meeting 

 t. c; legs ferruginous, with the knees, anterior and middle tibi» in front, 

 hind tibire in front at base and apex, and large area on hind coxae, all 

 cream-colour ; anterior coxa without spines. Abdomen very minutely but 

 strongly and closely punctured ; first segment black, with a broad ferrugi- 

 nous band, at each side of which is a small yellow patch ; segments 2 to 6 

 each with a very broad creamy-white band, occupying most of the surface, 

 but much constricted in the middle on second ; hind margins and extreme 

 bases of these segments black ; apical plate broad, truncate with rounded 

 comers, quite entire ; ventral segments, except the first, almost entirely 

 creamy-white. 



Hab. — Antonito, Colorado, Aug. 5, 1900; from the Colorado Agri- 

 cultural College. 



In my tables of Rocky Mountain Nomada this species runs out at 36. 

 In appearance, however, it suggests the subgenus Micronomada, from 

 which it differs by the spineless anterior coxa;. It is a very pretty and 

 distinct little species. 



Bombus hyperboreus Albertensis, n. var. (vel. n. sp.?). 

 ? . — Length about 19 mm.; width of abdomen 8 ; ocelli small, as in 

 Bombus, s. sir.; clypeus shining, convex, with sparse punctures of unequal 

 sizes, some very faint ; malar space about one-fourth broader than long ; 

 upper outer face of mandibles with three strong ridges ; labrum with a 

 pair of widely-separated transversely oval bosses ; flagellum short, third 

 antennal joint about as long as 4 + 5 ; mesothorax densely punctured, 

 except in middle, where it is smooth and shining ; hair of head black, of 

 thorax in front, pleura and scutellum, tawny-yellow, but a very broad black 

 band between the wings ; wings strongly reddened, a dark cloud at apex 



