HENRY J. FRANKLIN. 381 



neau, Popoff Island, Fox Point and Urea), British Columbia 

 (Mt. Cheam, Skagway District, Comox, Metlakatla, Van- 

 couver), Washington (Mt. Rainier, Olympic Mountains, 

 Seattle and Pullman), Oregon (Mt. Hood), Idaho (Lolo 

 Trail, Bitter Root Mountains) and California (Fieldbrook). 

 It is probably present in Yukon Territory, western Alberta, 

 western Montana and northwestern Wyoming. What are its 

 northern, eastern and southern limits ? It appears to be 

 pretty strictly confined to the Pacific portion of the Boreal 

 Region, and is apparently a common species throughout a 

 considerable portion of its range. It probably is not to be 

 found east of the Rocky Mountains. 



The original description is complete and definite enough 

 to plainly determine this species. The type specimens of 

 mixtuosus are evidently typical sitkensis. The females and 

 males above described should undoubtedly go together, as 

 indicated by their similarity of appearance and concordance 

 of habitat. 



This species is by far most closely allied to B. mixtus 

 Cress, on one side and to B. ambiguus on the other. The 

 females can apparently always be separated from those of 

 mixtus by means of their somewhat longer pile and their 

 dark scutellum. The males of the two species can be at once 

 separated by the striking difference between the flagella of 

 their antennae. 



Bo nib us (Bombus) mixtus Cress. 

 Bombus mixtus Cresson, Proc. Ac. Nat. Sci. Phila., 1878, p. 186, 



9 8. 

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



(Catal.). 

 Cresson, Syn. Hym. No. Amer., 1887, p. 308. 

 (Catal.). 

 " frigidus Ant. Handlirsch, Ann. naturh. Hofmus. Wien., VI, 

 1891, p. 454 (pars.). 

 mixtus Titus, Can. Ent., XXXIV, 1902, pp. 39 and 44, 9 . 

 " oregonensis Ashmead, Proc. Wash. Ac. Sci., IV, 1902, p. 126. 



Ashmead, Hym. of Alaska, 1904, p. 132. 

 " mixtus Cockerell, Univ. Color. Studies, IV, 1907, p. 257. 

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



Ent. Soc. Ont.), 1908, p. 111. 



TRANS. AM. ENT. SOC, XXXVIII. 



