﻿8 
  AOTUS 
  

  

  It 
  is, 
  therefore, 
  undeterminable 
  and 
  the 
  name 
  should 
  be 
  dropped 
  

   from 
  the 
  list. 
  That 
  the 
  examples 
  belonged 
  to 
  the 
  present 
  genus 
  and 
  

   not 
  to 
  Chirogale 
  is 
  quite 
  evident, 
  the 
  head 
  markings 
  alone 
  being 
  quite 
  

   sufficient 
  to 
  establish 
  this 
  fact. 
  

  

  Aotus 
  nigriceps 
  Dollman. 
  

  

  Aotus 
  nigriceps 
  Dollman, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  LV, 
  8th 
  Ser., 
  

   1909, 
  p. 
  200. 
  

  

  Type 
  locality. 
  Chanchamayo, 
  Peru. 
  Type 
  in 
  British 
  Museum. 
  

  

  Genl. 
  Char. 
  Black 
  stripes 
  on 
  head; 
  broad 
  lateral 
  ones 
  uniting 
  

   with 
  central 
  stripe 
  on 
  occiput 
  ; 
  hands 
  and 
  feet 
  dark 
  ; 
  tooth 
  rows 
  curved 
  ; 
  

   first 
  and 
  second 
  molars 
  nearly 
  equal 
  and 
  largest 
  ; 
  orbits 
  large. 
  

  

  Color. 
  A 
  spot 
  over 
  each 
  eye 
  extending 
  backward 
  and 
  curving 
  

   inward 
  in 
  a 
  narrow 
  line 
  and 
  almost 
  meeting 
  at 
  occiput, 
  white; 
  hairs 
  

   on 
  side 
  of 
  upper 
  lip, 
  white; 
  line 
  from 
  cheeks 
  extending 
  over 
  sides 
  of 
  

   head 
  and 
  broadening 
  as 
  it 
  goes, 
  joining 
  a 
  central 
  line 
  from 
  forehead 
  

   between 
  eyes 
  and 
  passing 
  over 
  the 
  crown, 
  black 
  ; 
  the 
  junction 
  of 
  these 
  

   three 
  lines 
  causes 
  the 
  occiput 
  also 
  to 
  be 
  black; 
  sides 
  of 
  head, 
  entire 
  

   upper 
  parts 
  of 
  body 
  and 
  outer 
  side 
  of 
  limbs 
  grizzled 
  iron 
  gray, 
  darkest 
  

   on 
  dorsal 
  line 
  from 
  middle 
  of 
  back 
  where 
  the 
  hairs 
  are 
  tipped 
  with 
  

   reddish 
  brown; 
  hands 
  and 
  feet 
  blackish 
  brown; 
  chin 
  blackish; 
  throat 
  

   and 
  entire 
  under 
  parts 
  of 
  body, 
  and 
  inner 
  side 
  of 
  limbs, 
  ochraceous 
  

   buff; 
  tail 
  above 
  at 
  base, 
  hairs 
  orange 
  buff 
  with 
  black, 
  grading 
  into 
  

   buff 
  yellow 
  with 
  black 
  tips, 
  and 
  then 
  becoming 
  all 
  black 
  on 
  apical 
  

   fourth 
  ; 
  beneath 
  deep 
  orange 
  at 
  base 
  of 
  hairs, 
  grading 
  into 
  orange 
  buff 
  

   with 
  black 
  tips, 
  and 
  then 
  all 
  black. 
  Ex 
  type 
  British 
  Museum. 
  

  

  Measurements. 
  Total 
  length, 
  740; 
  tail, 
  400; 
  foot, 
  90. 
  Skull: 
  

   total 
  length, 
  63.4; 
  occipito-nasal 
  length, 
  58; 
  intertemporal 
  width, 
  31.5; 
  

   width 
  of 
  braincase, 
  33.7; 
  Hensel, 
  41.7; 
  zygomatic 
  width, 
  39; 
  median 
  

   length 
  of 
  nasals, 
  96; 
  palatal 
  length, 
  18; 
  length 
  of 
  upper 
  molar 
  series, 
  

   15 
  ; 
  length 
  of 
  mandible, 
  37.5 
  ; 
  length 
  of 
  lower 
  molar 
  series, 
  16. 
  Ex 
  

   type 
  British 
  Museum. 
  

  

  This 
  species 
  differs 
  from 
  all 
  others 
  in 
  its 
  black 
  head 
  and 
  white 
  

   stripes, 
  and 
  dark 
  hands 
  and 
  feet. 
  A 
  large 
  series 
  is 
  in 
  the 
  British 
  

   Museum 
  from 
  Chanchamayo. 
  

  

  Aotus 
  senex 
  Dollman. 
  

  

  Aotus 
  senex 
  Dollman, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  IV, 
  8th 
  Ser., 
  1900, 
  

  

  p. 
  200. 
  

   Type 
  locality. 
  Pozuzo, 
  Peru. 
  Type 
  in 
  British 
  Museum. 
  

  

  