438 AMERICAN HYMENOPTERA. 



present in southern Nevada, northern and southwestern 

 Arizona, or western Mexico proper ? While not especially 

 rare in southern California, it does not appear to be very 

 common there. 



B. haueri Ant. Handlirsch is apparently the most closely 

 related to this species of all those known to me, but the two 

 can readily be separated by the coloration of the scutellum 

 and first abdominal segment. Next to haueri, B. morrisoni 

 Cress, appears to be the closest ally of crotchii. 



I have examined the type specimen of Provancher's B. 

 nigrocinctus. It is in the collection of the United States 

 National Museum. 



Bombus (BomlJias) rufocinctus Cress. 

 Bombus rufocinctus Cresson, Proc. Ent. Soc. Phila., II, 1863, p. 106, n. 



38, 8 cf . 

 " ternarius Putnam, Proc. Essex Inst., IV, 1863, p. 99 (pars.). 



Packard, Proc. Essex Inst., IV, 1864, p. 117. 

 *' edwardsii Cresson, Proc. Acad. Nat. Sci. Phila., 1878, p. 184, 

 9 (not the B and d"). 

 Trans. Amer. Ent. Soc, VII, 1879, p. 231 (Catal.) 

 (pars.). 

 " rufocinctus Cresson, Trans. Amer. Ent. Soc, VII, 1879, p. 



231 (Catal.). 

 " edwardsii Cresson, Syn. Hym. No. Amer., 1887, p. 308 (Catal.) 



(pars.). 

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



(Catal.). 

 " edwardsii Ant. Handlirsch, Ann. Naturh. Hofmus. Wien., 



Ill, 1888, p. 244. 

 " praticola Provancher, Addit. Faun. Can. Hym., 1888, p. 341, 

 n. 10, 8 (not the cf). 

 ? " rufocinctus Provancher, Addit. Faun. Can. Hym., 1888, p. 341, 

 n. 12, 9 S . 

 " edwardsii Dalla Torre, Cat. Hym., X, 1896, p. 518 (pars.) 

 (Catal.). 

 rufocinctus Dalla Torre, Cat. Hym., X, 1896, 545 (Catal.). 

 " iridis Cockerell and Porter, Ann. and Magaz. Nat. Hist., Ser. 



7, IV, 1899, p. 390. 

 " rufocinctus Cockerell and Porter, Ann. and Magaz. Nat. Hist., 



Ser. 7, IV, 1899, p. 391 (pars.). 

 " prunellcs Cockerell and Porter, Ann. and Magaz. Nat. Hist., 

 Ser. 7, IV, 1899, p. 391 (pars.). 



