AOTUS 17 



band reddish brown ; outer side of arms and legs dark brownish gray ; 

 under parts ochraceous buff ; inner side of arms buffy gray ; legs gray- 

 ish buff, more yellow than arms ; hands dark grayish, feet yellowish 

 brown ; tail at base reddish brown, remainder black ; sometimes the 

 base of tail is tawny ochraceous. 



Measurements. Total length, 605; tail, 330; hind foot, 85; ear, 

 25, (Collector). Skull: occipito-nasal length, 60; Hensel, 40; inter- 

 temporal width, 32; zygomatic width, 40; palatal length, 17; breadth 

 of braincase, 33 ; median length of nasals, 10 ; length of upper molar 

 series, 13; length of mandible, 40; length of lower molar series, 15. 



AoTUS osERYi (I. Geoff roy et Deville). 



Nyctipithecus oseryi I. Geoff, et Deville, Compt. Rend., XXVII, 

 1848, p. 498; I. Geoff., Cat. Primates, 1851, p. 39; Casteln., 

 Exped. Amer. Sud, Mamm., 1855, p. 15, pi. II; Wagn., 

 Schreb., Saugth. Suppl., 1855, p. 106; Dahlb., Stud. Zool. 

 Fam. Reg. Anim. Nat., fasc. I, 1856, pp 148, 149; Reichenb., 

 Vollstand. Naturg. Affen, 1862, p. 18; Bartl. and Sclat., Proc. 

 Zool. Soc. Lond., 1871, p. 220. 

 Type locality. "Haute Amazone, Perou." 



Genl. Char. Three stripes on head ; no stripes on dorsal region ; 

 tail long. 



Color. Central stripe from forehead to occiput, and two lateral 

 lines from occiput to eyes, and down side of face to angle of mouth, 

 black; yellowish white spot over eyes; top of head between stripes 

 brownish gray ; sides of head yellowish brown ; upper parts of body 

 and outer side of limbs pale yellowish brown, dorsal region reddish ; 

 under parts and inner side of limbs yellowish white, probably much 

 deeper yellow originally ; hands and feet very dark brown ; face bare ; 

 tail with sides on basal half yellowish or pale ochraceous brown, top , 

 and remaining portion to tip, blackish brown. Ex type Paris Museum. 

 Measurements. In size about equal to A. infulatus. 



Two specimens of this form are in the Paris Museum. It has 

 usually been classed as a synonym of A. infulatus, or as the young 

 of that species. The skull of A. oseryi is in the mounted type, showing 

 the teeth, and judging from what can be seen of these, the specimen 

 would seem to be adult. It is an entirely different color from A. 

 INFULATUS, and the three black stripes on the head are clear and 

 distinct, going to the occiput which is not the case in A. infulatus. 

 The general hue is a yellowish brown mixed with gray. The animal is 



