HENRY J. FRANKLIN. 361 



BombusfrigidusFrova.nch.eT, Addit. Faun. Canada. Hymen., 1888, p. 

 341, n. 11, 9 a c?. 

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



1891, p. 454 (pars.). 

 Dalla Torre, Cat. Hym., X, 1896, p. 521 (pars.). 

 " frigidus Cockerell, Psyche, IX, 1901, p. 163. 

 " derhamellus Cockerell, ibid. 

 ? " Oregonensis Titus, Can. Ent., XXXIV, 1902, p. 39, 9 , and p. 

 44, cf . 

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

 ? " " Titus, Can. Ent., XXXIV, 1902, pp. 39 and 43, 9 cf. 



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



? " frigidus Cockerell, Trans. Amer. Ent. Soc, XXXII, 1906, p. 

 312. 

 " " H. Friese, Ann. du. Mus. Zool. de I'Acad. Imp. des 



Sci. de St. Petersb., 1904, Tome IX, no. 4. 

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



Types. — The queen, taken in Latitude 65°, described as 

 derhamellus by Kirby, is probably in the British Museum col- 

 lection, but may have lost its identity. The male is in the 

 same collection as is also the specimen on which Smith 

 based his description of the queen. 



Pile rather long and fine. Face of female black, of male yellow ; 

 thorax all yellow, except a broad black interalar band ; abdominal 

 dorsum yellow at base, black in middle atid ferriigi?ious or ferruginous- 

 yellow at apex ; corbicular fringes more or less ferruginous ; malar 

 space rather short. 



Queen. Head. — Broadly triangular in outline. Occiput bearing yel- 

 low pile, without admixture of black hairs ; face and sides behind eyes 

 bearing little or no pile of a color other than dark brown or black. 

 Labrum with large tubercle-like areas smooth on their somewhat con- 

 caved summits, their anterior borders somewhat sharply rounded, and 

 with the shelf-like projection between them small as in tnixtus. Malar 

 space not longer than its width at apex, not more than one-fifth as 

 long as the eye. Clypeus moderately to sparsely punctate, shining. 

 Flagellum of antennae scarcely twice as long as scape ; third antennal 

 segment distinctly longer than fifth, fourth and fifth subequal. 



Thorax. — Dorsum covered with yellow pile except for a wide black 

 interalar band, which is widest at the middle line of the body, its front 

 margin curving forward slightly and its hind margin backward in the 

 middle ; with usually no sharp median V like extension of the black back 

 onto the scutellum. Tegulffi dipping into the yellow in front so as to 

 be from a third to half surrounded by it ; center of disc naked, smooth 



TRANS. AM. ENT. SOC, XXXVUI. (46) 



