424 Bulletin American Museum of Natural History. [Vol. XX, 



of the United States, shows that the coloration in the two 

 groups is strikingly different. The absence of skins from 

 southern Brazil prevents comparison of the external char- 

 acters of torvum with those of tajacu, as now restricted, but 

 below will be found a comparison of their cranial characters. 

 In general effect the color of T. torvum is a grizzle of ochra- 

 ceous buff, white, and black, the mid-dorsal region being 

 black and white with a tinge of buff, becoming yellowish 

 gray finely varied with black on the sides, and strong yellow- 

 ish buff on the ventral surface and inner surface of the limbs, 

 slightly punctated with brownish black. Black prevails on 

 the median dorsal area, forming a more or less well denned 

 vertebral black stripe, with part of the bristles wholly black 

 and part black barred with white, the black being 'most de- 

 veloped on the crown, nape, and shoulders, and more mixed 

 with white posteriorly. The hairs individually, except near 

 the median line, are ringed with alternate bands of black and 

 fulvous white, about two of each to each bristle. The fulvous 

 tint forms merely an indistinct border to the white bars. 

 The tips of the bristles are usually black but a part are tipped 

 with yellowish white. The head, except a median blackish 

 face stripe, is usually much more strongly suffused with 

 yellowish buff than the body, particularly on the sides of the 

 face and between the eyes and the base of the ears, this 

 strong bufnness or rusty yellow cast of the head, in contrast 

 with the middle region of the back, being a conspicuous 

 feature of the species as compared with any of its northern 

 allies. The strongly marked ochraceous buff collar is another 

 prominent and very constant feature, formed by the two 

 shoulder bands, which begin on the throat and extend pos- 

 teriorly and upward, nearly meeting over the shoulders. 

 Feet and anterior surface of limbs blackish brown; chin 

 blackish, and a median blackish band on the face. 



Unfortunately, as already stated above, there are practi- 

 cally no external measurements, the specimens having been 

 taken by native hunters and skinned without being measured 

 or any record being made of the sex. The total length is 

 given for two adults as, respectively, 914 and 927 mm. 



