HENRY J. FRANKLIN. 143 



the remaining segments shading off toward the apex of the abdomen 

 into rich ferruginous-red. Venter black at base, but, beginning a 

 little behind the middle, the apical margins of the segments fringed 

 more or less heavily, especially toward the side margins, with ferru- 

 ginous hairs. 



Legs. — Dark and with dark clothing. 



Dimensions. — Length : queen, 19 mm. to 24 mm. ; worker, 13 mm. 

 to 17 mm. ; male, \1\ mm. Spread of wings: queen, 47 mm. to 49 

 mm.; worker, 30 mm. to 32 mm. Width of abdomen at second seg- 

 ment: queen, 11 mm. to 12 mm.; worker, 6 mm. to 6^ mm. 



I have here redescribed the queen from ten, and the worker 

 from two, specimens. The description of the male here 

 given is simply a transposition of the original description of 

 that sex. 



Habitat. — The records for this species, so far known, are 

 all Mexican (Orizaba, Takubaya, Mexico City, Eslava and 

 Meadow Valley — head of Rio Piedras Verdes — six miles 

 south of Colonia Garcia, in the Sierra Madre of Western 

 Chihuahua, at an altitude of about 7,000 feet). 



The male type is not in good condition, the pile of the ab- 

 domen being badly matted. It seems probable that, in a 

 good fresh specimen, the coloration of the abdomen of this 

 sex would more nearly approximate that of the abdomen of 

 the females. 



This species apparently has its closest ally in crotchii. 



Boinbus (Boiubias) braohyceplialus Handl. 

 ? Bombus diligefis Smith, Journ. of Entom., I, 1861, p. 154, n. 5, 9 . 

 ? " " Cresson, Proc. Ent. Soc. Phila., II, 1863, p. 110, 



n. 43-44, 9 . 

 ? " " Cresson, Trans. Amer. Ent. Soc, VII, 1879, p. 230 



(Catal.). 

 " brachycephalus Ant. Handlirsch, Ann. Naturh. Hofmus. 

 Wien., Ill, 1888, p. 244, 9 S c? ; T. 10, 

 F. 13. 

 . Dalla Torre, Cat. Hym., X, 1896, p. 512. 

 Cockerell, Cat. Abej. de Mexico, 1899, p. 19 

 (Catal.). 



Types. — Handlirsch described brachycephalus from two 

 queens, two workers and one male, all collected by Bilimek 

 in Mexico (Cuernavacca and Orizaba). These specimens 

 are in the k. k. Hofmuseum at Vienna. 



TRANS. AM. ENT. SOC, XXXIX. 



