106 CEBUS 



Genl. Char. Hair on head very thick, long, depressed in the 

 center, and rising on each side in broad ridges extending from forehead 

 to occiput, unlike horns or tufts ; size large ; tail long, thick ; hairs of 

 body long, loose ; arms above elbows pale ; fingers and toes gray. 



Color. Male. Top of head from forehead to nape extending to 

 hind neck, black ; temples and cheeks yellowish white ; dark brown 

 band in front of ear down face to lower jaw, not meeting beneath ; 

 dorsal region Prout's brown ; rest of upper parts and flanks bistre ; 

 arms above elbows and sides of neck, cream buflf ; thighs ochraceous 

 buff; forearms and legs below knees black ticketed with reddish, most 

 numerous on forearms ; throat, chest, under parts to scrotum, inner 

 side of arms above elbows, and innermost side of thighs golden yellow ; 

 inner side of forearms, outer portion of thighs and legs below knees, 

 scrotimi and anal region black ; hands and feet black, fingers and toes 

 covered with gray hairs ; tail above, three fourths black speckled with 

 red, remainder black, beneath brownish black, hairs pale yellow at base 

 then brownish black, or towards tip grayish white at base, then black. 



Measurements. Total length, 910; tail, 460; foot, 132; ear, 35, 

 (Collector). Skull: total length. 94.1; occipito-nasal length, 81.7; 

 intertemporal width, 41.6; breadth of braincase, 52.5; Hensel, 63.8; 

 zygomatic width, 70.3; palatal length, 32.1; median length of nasals, 

 28.1; length of upper molar series, 23.5; length of mandible, 64.5; 

 length of lower molar series, 28.3. 



This species belongs to the Azara group as indicated by the gray 

 fingers and toes. It is, however, a much darker animal than either C. 

 .\ZAYLM or C. a. pallidus. The patch on the head is more extensive, 

 heavier and blacker than that of C. azar^, and of course entirely 

 different from that of C. a. pallidus with its two imperfect black 

 patches. The black cap of C. azaRvE is inclined to lie flat to the head, 

 except just in front in most examples, where on each side two low 

 ridges can be seen, but some specimens have small tufts over forehead ; 

 both styles, however, are quite different from the conspicuous 

 ridges of the present species which exhibit the hairs rising close 

 together at the forehead, widening as they extend backward until they 

 occupy, with the exception of a narrow division in the center, the 

 entire occipital portion of the head. The coloring of the two forms, as 

 the descriptions show, is quite different. Five specimens were 

 procured by Mr. Robert at Araguay, Rio Jordao, western Minas 

 Gerass, Brazil, all of which are in the British Museum. 



