HENRY J. FRANKLIN. 283 



Bombus borealis Provancher, Addit. Faun. Canada. Hymen., 1888, p. 

 340, 9 cf. 

 Howard, Insect Life, I, 1889, p. 295. 

 Coville, Proc. Ent. Soc. Wash., I, P. 4, 1890, pp. 198 

 and 201. 

 ' " fervidus Dalla Torre, Cat. Hym., X, 1896. p. 519 (pars.). 



borealis Robertson, Trans. Ac. Sci., St. Louis, VII, 1897, p. 

 356. 

 Jarvis, Thirty-sixth Ann. Rep't Ent. Soc. Ont., 1905, 



p. 128. 

 Lowell, Ent. News, XVIII, May, 1907, p. 198. 

 " " Fletcher and Gibson, Can. Ent. Rec. (Ann. Rep't 



Ent. Soc. Ont.), 1907, p. 16; 1908, p. 111. 



Types. — Queen probably in the collection of the British 

 Museum, but identity apparently lost as Col. Bingham was 

 unable to locate it definitely for me. Worker and male in 

 the collection of the American Entomological Society. 



Females with face and occiput covered with light pile ; thoracic dor- 

 sum yellow, except for a broad black inter alar band ; pleura black ; first 

 four dorsal abdominal segments yellow, the rest black ; venter black ; 

 legs black ; wings rather dark ; malar space rather long. Males like 

 females, for most part, but the legs and venter with some light pile. 



Queen. Head. — Rather elongate ; face above and below the bases 

 of the antennae well covered with a large patch of whitish pile, with 

 at most only a slight admixture of black hairs ; occiput with pure 

 whitish yellow pile, with little or no admixture of dark hair ; sides of 

 head dark, except for sometimes a little light pile near the top. Labrum 

 with tubercle-like areas well separated, rounded above and flattened 

 on the summits ; shelf-like projection rather small, not very promi- 

 nent ; translucent areas very dim or absent. Malar space longer than 

 its width at apex, nearly one-third as long as the eye. Flagellum of 

 antennae somewhat less than twice as long as scape ; third antennal 

 segment longer than fifth, the fifth longer than the fourth. 



Thorax. — Center of disc bare, smooth and shining. Anterior part 

 of dorsum and scutellum covered with yellow pile ; a broad black band 

 between the bases of the wings ; mesopleura black from somewhat 

 below the level of the bases of the wings to the bases of the legs ; 

 metapleura and sides of median segment dark. 



Abdomen. — Dorsum : first four segments usually entirely covered 

 with yellow pile, but the sides of the fourth sometimes with some black 

 pile ; segment five often entirely black, but usually with a slight ad- 

 mixture of light hairs on the apical margin ; apical segment black. 

 Venter mostly black, but sometimes with a slight sprinkling of light 

 hairs. Hypopygium with a distinct carina on its apical third. 



TRANS. AM. ENT. SOC, XXXVIII. 



