﻿ATELEUS 
  43 
  

  

  of 
  Ateles 
  were 
  seen 
  in 
  the 
  forest 
  from 
  an 
  elevation 
  of 
  7,000 
  feet 
  to 
  

   as 
  low 
  as 
  2,500 
  feet, 
  on 
  the 
  outskirts 
  of 
  the 
  coffee 
  plantations 
  of 
  San 
  

   Augustin. 
  So 
  far 
  as 
  Mr. 
  Salvin 
  could 
  see 
  with 
  his 
  glass, 
  these 
  

   Monkeys 
  showed 
  no 
  variation 
  in 
  color, 
  being 
  dark 
  above 
  and 
  light 
  

   beneath; 
  but 
  the 
  trees 
  in 
  which 
  they 
  were 
  found 
  were 
  very 
  lofty, 
  

   and 
  the 
  foliage 
  so 
  dense 
  as 
  to 
  make 
  it 
  difficult 
  to 
  observe 
  them 
  

   accurately." 
  

  

  At 
  Mirador, 
  near 
  Mount 
  Orizaba, 
  State 
  of 
  Vera 
  Cruz, 
  Professor 
  

   Liebmann 
  found 
  this 
  species 
  common, 
  going 
  in 
  small 
  troops 
  in 
  the 
  deep 
  

   ravines 
  up 
  to 
  an 
  elevation 
  of 
  2,000 
  feet. 
  In 
  eastern 
  Oaxaca 
  he 
  also 
  

   found 
  it 
  at 
  a 
  height 
  of 
  4,000 
  feet. 
  He 
  believed 
  it 
  does 
  not 
  go 
  on 
  the 
  

   Pacific 
  slope 
  of 
  the 
  mountains 
  nor 
  farther 
  north 
  than 
  Tehuantepec. 
  

  

  Ateleus 
  fusciceps 
  Gray. 
  

  

  Ateles 
  ( 
  !) 
  fusciceps 
  Gray, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1865, 
  p. 
  733 
  ; 
  

   Id. 
  Cat. 
  Monkeys, 
  Lemurs 
  and 
  Fruit-eating 
  Bats, 
  Brit. 
  Mus., 
  

   1870, 
  p. 
  42; 
  Sclat, 
  Proc. 
  Zool. 
  Soc. 
  Lond, 
  1872, 
  p. 
  663, 
  pi. 
  

   LV; 
  Schleg., 
  Mus. 
  Pays-Bas, 
  Simiae, 
  1876, 
  p. 
  173; 
  Forbes, 
  

   Handb. 
  Primates, 
  I, 
  1894, 
  p. 
  242. 
  

  

  BROWN-HEADED 
  SPIDER 
  MONKEY. 
  

  

  Type 
  locality. 
  Unknown. 
  Type 
  in 
  British 
  Museum. 
  

  

  Geogr. 
  Distr. 
  Trans-Andean 
  Ecuador. 
  Range 
  unknown. 
  

  

  Genl. 
  Char. 
  Thumb 
  absent. 
  

  

  Color. 
  Top 
  of 
  head 
  yellowish 
  wood 
  brown 
  darkening 
  to 
  a 
  line 
  of 
  

   mummy 
  brown 
  above 
  the 
  forehead 
  ; 
  upper 
  parts 
  and 
  limbs 
  black 
  tinged 
  

   with 
  burnt 
  umber 
  brown, 
  the 
  tips 
  of 
  the 
  hairs 
  being 
  of 
  that 
  color; 
  

   hands, 
  feet 
  and 
  tail, 
  black; 
  under 
  parts 
  blackish 
  brown. 
  Ex 
  type 
  

   British 
  Museum. 
  

  

  Measurements. 
  Skull: 
  total 
  length, 
  114; 
  occipito-nasal 
  length, 
  

   102; 
  zygomatic 
  width, 
  71; 
  intertemporal 
  width, 
  52; 
  palatal 
  length, 
  33: 
  

   breadth 
  of 
  braincase, 
  62 
  ; 
  median 
  length 
  of 
  nasals, 
  21 
  ; 
  length 
  of 
  upper 
  

   molar 
  series, 
  24 
  ; 
  length 
  of 
  mandible, 
  72 
  ; 
  length 
  of 
  lower 
  molar 
  series, 
  

   29. 
  Ex 
  type 
  British 
  Museum. 
  

  

  The 
  type 
  of 
  this 
  species, 
  a 
  skin 
  in 
  the 
  Collection 
  of 
  the 
  British 
  

   Museum, 
  was 
  obtained 
  from 
  the 
  Zoological 
  Society, 
  the 
  animal 
  having 
  

   been 
  received 
  alive, 
  patria 
  unknown, 
  and 
  died 
  in 
  the 
  gardens. 
  Subse- 
  

   quently 
  other 
  specimens 
  were 
  procured 
  by 
  Mr. 
  Buckley 
  in 
  Ecuador, 
  

   locality 
  not 
  given. 
  It 
  is 
  apparently 
  quite 
  a 
  distinct 
  form, 
  the 
  peculiar 
  

   coloring 
  of 
  the 
  top 
  of 
  the 
  head 
  making 
  it 
  easily 
  recognizable. 
  

  

  