HENRY J. FRANKLIN. 377 



Legs. — Trochanters with considerable Hght pile on their lower sides 

 and the corbicular fringes with some ferruginous hairs (as seen with 

 a lens); otherwise mostly dark ; the tarsi rather strongly ferruginous. 



Worker. — Much like the queen, but the occiput always and the face 

 sometimes with a strong admixture of black hairs with the yellow ; 

 the thorax usually with a somewhat stronger sprinkling of yellow hairs 

 on the hind margin of the scutellum than in the case of the queen ; 

 sometimes with no line of dark pile running forward from the tegula ; 

 metapleura sometimes mostly dark and sometimes mostly yellow ; 

 sides of median segment usually with a sprinkling of yellow hairs ; first 

 dorsal abdominal segment yellow on the sides, but dark and sparsely 

 clothed in the middle ; second dorsal segment sometimes as in queen, 

 but usually with a noticeable median triangle of black pile, the base 

 of the triangle being on the front margin and its apex reaching back- 

 ward across the hind margin ; the dorsum of the abdomen as a whole 

 usually with but little light pile and sometimes entirely dark beyond 

 the second segment ; corbicular fringes usually entirely dark ; tro- 

 chanters sometimes with very little light pile ; venter sometimes with 

 very little light hair on the apical margins of any of the segments. 



Male. — Unknown. 



Dimensions. — Length : queen, 12 mm. ; worker, 9 mm. to 12 mm. 

 Spread of wings : queen, 30 mm. ; worker, 21 mm. to 25 mm. Width 

 of abdomen at second segment: queen, 8 mm. ; worker, 5 mm. to 6 

 mm. 



Habitat. — My records for this species are only those of 

 the type specimens, as follows : California (one queen w^ith- 

 out locality label, three workers from Sisson and one worker 

 from Santa Cruz Mountains) and Washington (two workers 

 from Keyport). It appears to be a rare species, confined to 

 the Pacific coast region of the western United States. What 

 are its northern, eastern and southern limits ? 



This form is most closely related to B. sitkensis Nyl. of 

 which it may be only a subspecies, though all the specimens 

 before me have noticeably shorter pile than has that species. 



Bonibus (Bombiis) sitkensis Nyl. 

 Bombus sitkensis Nyl., Notis. Saellsk. Faun, and Fl. Fenn. Forh., I, 

 1848 (adnot.), p. 235, n. 19, 9 cf. 

 " " Cresson, Proc. Ent. Soc. Phila. II, 1863, p. 102, n. 



29, ? S . 

 " oregonensis Cresson, Proc. Acad. Nat. Sci. Phila., 1878, p. 



185, d^. 

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

 (Catal.). 



TRANS. AM. BNT. SOC, XXXVIII. (48) 



