AOTUS IS 



mistake had been made in the locality assigned, for the origins given to 

 examples "obtained by this collector in other branches of Zoology have 

 not always been free from doubt." 



This species is most easily distinguished from A. infulatus by 

 the three black stripes on the head, and the grayish white, or ochra- 

 ceous buff on the forehead is carried back between the black stripes, 

 not being restricted to the forehead alone as in the other species 

 compared. The general color of the pelage is more reddish than in A. 

 INFULATUS. Frequently in the make up of sTcins, especially in old 

 material, the stripes on the head are confused with the white, and it is 

 sometimes not easy to ascertain whether there are three stripes or not, 

 the hairs having become twisted and set, and refuse to assume their 

 proper position. Some individuals have the top of the head russet, 

 and some are grayish. 



AoTUS GEISEIMEMBRA Elliot. 



Nyctipithecus felinus (nee Spix), Bangs, Proc. N. Eng. Zool. 

 Club, I, 1900, p. 102, ex Santa Marta, Colombia. 



Aotus griseimembra Elliot, Bull. Am. Mus. Nat. Hist., N. Y., 

 1912, p. 33 ; Allen, Bull. Am. Mus. Nat. Hist., N. Y., XXXI, 

 1912, p. 95. 



Type locality. Hacienda Cincinnati, Santa Marta ; and Rio Sinu 

 Cerete, Bolivar; Colombia. Type in American Museum of Natural 

 History, in New York. 



Color. Spot above and below each eye white; a black patch 

 beginning at a point on forehead between each eye and extending 

 backward on crown, fan-shaped; jet black line extending from each 

 eye on side of head and going to occiput ; rest of head, neck and upper 

 parts mixed cinnamon and black; arms and legs smoke gray, hairs 

 tipped with buff ; no cinnamon nor black present ; hands mummy brown 

 and black; feet black on sides, golden brown on center and on toes; 

 sides of head and neck grayish ; throat buff ; rest of under parts and 

 inner side of arms and thighs ochraceous buff ; flanks grayish buff ; 

 tail at root above like upper parts, mixed black and cinnamon, beneath 

 at root dark ochraceous rufous ; sides on basal half buff, hairs black 

 tipped ; rest of tail jet black. Ex type in American Museum of Natural 

 History in New York. 



Measurements. Total length, 1,047; tail, 2,72; foot, 92.5, (Col- 

 lector). Skull : total length, 60; occipito-nasal length, 58.2; zygomatic 

 width, 36.5; intertemporal width, 32; median length of nasals, 11; 

 breadth of braincase, 32 ; palatal length, 16.4 ; length of upper molar 



