﻿92 
  CEBUS 
  

  

  a 
  history, 
  its 
  habitat 
  unknown, 
  and 
  lacking 
  even 
  a 
  single 
  character 
  to 
  

   separate 
  it 
  from 
  a 
  species 
  described 
  twenty 
  years 
  before, 
  is 
  a 
  source 
  of 
  

   confusion 
  and 
  perplexity 
  to 
  all 
  investigators 
  who 
  are 
  unable 
  to 
  have 
  

   personal 
  knowledge 
  of 
  it. 
  The 
  practice 
  of 
  giving 
  names 
  to 
  such 
  

   specimens, 
  in 
  which 
  Gray 
  was 
  frequently 
  an 
  offender, 
  is 
  especially 
  

   reprehensible 
  when 
  indulged 
  in 
  with 
  such 
  a 
  genus 
  as 
  Cebus, 
  whose 
  

   members 
  exhibit 
  extreme 
  variation 
  in 
  the 
  colors 
  of 
  their 
  coats, 
  sur- 
  

   passed 
  possibly 
  by 
  no 
  other 
  group 
  of 
  mammals, 
  save, 
  perhaps, 
  the 
  

   squirrels 
  of 
  Mexico. 
  

  

  The 
  type 
  of 
  C. 
  Havescens 
  is 
  in 
  the 
  British 
  Museum, 
  and 
  may 
  be 
  

   described 
  as 
  follows: 
  crown, 
  nape 
  and 
  dorsal 
  region, 
  pale 
  brownish 
  

   yellow 
  tinged 
  with 
  reddish 
  on 
  lower 
  back 
  ; 
  sides 
  of 
  head, 
  flanks, 
  limbs, 
  

   under 
  parts 
  and 
  tail 
  pale 
  yellow, 
  tinged 
  with 
  reddish 
  on 
  outer 
  side 
  of 
  

   arms, 
  thighs 
  and 
  upper 
  side 
  of 
  tail 
  ; 
  hands 
  and 
  feet 
  reddish 
  brown. 
  

  

  Cebus 
  unicolor 
  cuscinus 
  Thomas. 
  

  

  Cebus 
  flavescens 
  cuscinus 
  Thos., 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  VII, 
  7th 
  

   Ser., 
  1901, 
  p. 
  179; 
  Festa, 
  Boll. 
  Mus. 
  Torino, 
  1903, 
  p. 
  6. 
  

  

  Type 
  locality. 
  Callanga, 
  Cuzco, 
  Peru. 
  Type 
  in 
  British 
  Museum. 
  

  

  Genl. 
  Char. 
  Closely 
  allied 
  to 
  C. 
  unicolor 
  Spix, 
  but 
  with 
  a 
  large 
  

   brown 
  coronal 
  patch. 
  

  

  Color. 
  Forehead 
  and 
  cheeks 
  yellowish 
  brown; 
  crown 
  and 
  nape 
  

   dark 
  chestnut 
  ; 
  base 
  of 
  hairs 
  pale 
  brown 
  ; 
  dorsal 
  region 
  mummy 
  brown 
  

   tinged 
  with 
  reddish, 
  brightest 
  and 
  reddest 
  on 
  the 
  rump; 
  outer 
  side 
  of 
  

   arms 
  pale 
  brown; 
  legs 
  reddish; 
  inner 
  side 
  of 
  arms 
  and 
  legs 
  pale 
  

   ochraceous 
  rufous; 
  flanks 
  pale 
  brown; 
  throat 
  and 
  chest 
  yellowish 
  

   white 
  ; 
  rest 
  of 
  under 
  parts 
  pale 
  ochraceous 
  rufous 
  ; 
  tail 
  reddish 
  brown, 
  

   base 
  of 
  hairs 
  nearly 
  white; 
  hands 
  and 
  feet 
  reddish, 
  digits 
  gray. 
  Ex 
  

   type 
  British 
  Museum. 
  

  

  Measurements. 
  Total 
  length, 
  730; 
  tail, 
  390; 
  foot, 
  250; 
  ear, 
  35, 
  

   (Collector). 
  Skull: 
  total 
  length, 
  92; 
  occipito-nasal 
  length, 
  82.4; 
  inter- 
  

   temporal 
  width, 
  40.5; 
  Hensel, 
  60.3; 
  zygomatic 
  width, 
  61.1; 
  width 
  of 
  

   braincase, 
  50.7; 
  median 
  length 
  of 
  nasals, 
  15; 
  palatal 
  length, 
  29.2; 
  

   length 
  of 
  upper 
  molar 
  series, 
  18.4 
  ; 
  length 
  of 
  mandible, 
  57.5 
  ; 
  length 
  of 
  

   lower 
  molar 
  series, 
  24.3. 
  Ex 
  type 
  in 
  British 
  Museum. 
  

  

  This 
  is 
  another 
  species 
  of 
  Cebus 
  described 
  from 
  a 
  single 
  immature 
  

   example, 
  a 
  female, 
  but 
  without 
  some 
  of 
  the 
  objections 
  attached 
  to 
  

   Gray's 
  specimen, 
  for 
  this 
  one 
  has 
  a 
  history 
  and 
  we 
  know 
  the 
  locality 
  

   whence 
  it 
  came. 
  Although 
  it 
  exhibits 
  some 
  difference 
  in 
  color 
  from 
  C. 
  

   unicolor 
  Spix, 
  mindful 
  of 
  the 
  variations 
  existing 
  in 
  their 
  hues 
  among 
  

   all 
  the 
  Capuchin 
  Monkeys, 
  the 
  probability 
  is 
  that 
  eventually 
  it 
  will 
  

  

  