AOTUS 19 



Genl. Char. Fur woolly, long, soft ; three lines on head, lateral 

 one not meeting on occiput ; tail bushy. 



Color. Similar to A. lanius but paler; a buff line from above 

 eyes extending back to occiput, and a brownish black line from corner 

 of each eye to crown only ; occiput, and dorsal region to tail yellowish 

 red, much paler than this portion in A. lanius ; outer side of arms 

 and flanks yellowish gray, the flanks paler than arms and more yellow ; 

 outer side of legs similar to flanks; chin, throat, under part of body 

 and inner side of limbs buff; hands and feet reddish brown; tail 

 above and beneath on basal half orange, hairs black tipped, remaining 

 portion to tip, black. Ex type British Museum. 



Measurements. Total length, 580; tail, 220; foot, 80, (skin). 

 Skull: total length, 65.5; occipito-nasal length, 59.1; intertemporal 

 width, 60.5; zygomatic width, 57.7; breadth of braincase, 31.6; median 

 length of nasals, 13.3; palatal length, 15.4; length of upper molar 

 series, 13.5; length of mandible, 35.4; length of lower molar series, 

 16.1. Ex type British Museum. 



This species while having woolly, thick fur, and bushy tail like A. 

 LANIUS is much lighter in color and quite differently marked upon the 

 head. The tooth rows are much shorter. The unique type in the 

 British Museum was obtained at Macas in Ecuador, and probably the 

 species is found in high latitudes on the mountains. 



AoTus spixi (Pucheran). 



Nyctipithccus spixi Pucher., Rev. Mag. Zool., 1857, pp. 335, 352; 

 Reichenb., Vollstand. Naturg. Affen, 1862, p. 20. 



Type locality. "Amerique Meridionale." Type Paris Museum. 



Genl. Char. Three brownish black lines on head, one central, and 

 two lateral extending to occiput. Size moderate, tail long. 



Color. Top of head with the central and two lateral brownish 

 black lines; spots over eyes grayish white, extending back to occiput, 

 and graduating into grayish brown ; dorsal line golden, indistinct on 

 middle of back, clearer on rump ; nape, sides of head, upper parts and 

 outer side of limbs, brownish gray, hairs tipped with white ; sides paler ; 

 the lateral brownish black lines extending down each side of the face 

 and meeting on the throat below chin, which is whitish ; under parts 

 and inner side of limbs pale yellow ; hands and feet reddish brown, 

 mixed with white hairs on hands ; tail, basal half grayish brown like 

 flanks on under parts and side, above black, apical half black ; face 

 bare save a few white hairs on lips. Ex type Paris Museum. 



