60 LAGOTHRIX 



blue or silver gray hues so characteristic of L. lagotricha, and the 

 red of L. cana is absent altogether. The specimen is a female. 



Lagotheix ubemcola Elliot. 



Lagothrix uhericola Elliot, Ann. Mag. Nat. Hist., IV, 8th Ser., 

 1909, p. 246. 



Type locality. Barrigudo, River Jurua, Upper Amazon. Type in 

 British Museum. 



Geogr. Distr. Upper Amazon, Rio Solimoens and Rio Jurua, 

 Peru. 



Genl. Char. Color pale ; hair soft, rather short, buff at base. 



Color. Top of head to nape, inner side of hands and feet black; 

 upper parts of body, and arms to elbows grizzled vi^ood brown, with 

 a reddish tinge on rump and thighs, the hairs being buff at base, with 

 a subterminal black ring and whitish tips ; outer side of forearms iron 

 gray ; tops of legs to knees iron gray, when the color becomes blackish 

 brown ; the hairs with yellow tips on the fingers and toes, which are 

 black ; flanks and sides of abdomen yellowish brown ; chest and middle 

 of abdomen black ; hairs of tail above like upper side of legs, tawny 

 ochraceous with black and white rings and white tips ; beneath rufous 

 brown at base, rest black. Ex type British Museum. 



Measurements. About the size of L. lagotricha but more 

 slender in body. Skull: total length, 116.6; occipito-nasal length, 103; 

 zygomatic width, 65.7 ; intertemporal width, 59.5 ; palatal length, 30 ; 

 breadth of braincase, 61.5; median length of nasals, 10.6; length of 

 upper molar series, 25.2 ; length of mandible, 69 ; length of lower molar 

 series, 29. Ex type in British Museum. 



The type in the British Museum is from the Jurua River, Upper 

 Amazon, Brazil. It is full grown but not an old adult. It differs 

 markedly from L. lagotricha in color, and as the young of that 

 species resemble the adults, these cannot be considered as possessing 

 immature coats and therefore are not to be regarded as representing 

 the same species. The locality of these specimens is south of the 

 range of L. lagotricha. It is not so large as the last named species, 

 is more slenderly built, and its very light color, a grizzled wood brown, 

 makes it conspicuously different from all the other members of the 

 genus. The type is unique. 



Lagotheix cana (Humboldt). 



Simla cana Humb., Rec. Obs. Zool., I, 1811, (1815), p. 354. 

 Lagothrix cana E. Geoff., Ann. Mus. Hist. Nat. Paris, XIX, 1812, 



