﻿32 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  »►: 
  

  

  length, 
  103.7, 
  101.5 
  mm.; 
  orbital 
  width, 
  58.7, 
  52.7; 
  postorbital 
  constric- 
  

   tion, 
  46.8, 
  45.9; 
  width 
  of 
  brain 
  case, 
  55.7, 
  56.2; 
  zygomatic 
  width, 
  61.6, 
  

   56.8 
  ; 
  maxillary 
  tooth 
  row, 
  28. 
  26.2. 
  

  

  Remarks. 
  — 
  A. 
  geoffroyi 
  appears 
  to 
  be 
  the 
  first 
  identifiable 
  name 
  

   applied 
  to 
  a 
  spider 
  monkey 
  from 
  Middle 
  America. 
  At 
  the 
  time 
  it 
  

   was 
  described 
  the 
  locality 
  from 
  which 
  the 
  type 
  specimen 
  came 
  was 
  

   unlmown. 
  Much 
  general 
  evidence, 
  however, 
  indicates 
  that 
  this 
  is 
  the 
  

   so-called 
  gray 
  spider 
  monkey, 
  also 
  described 
  as 
  A. 
  melanoGhir, 
  now 
  

   known 
  to 
  inhabit 
  southeastern 
  Nicaragua, 
  and 
  that 
  this 
  general 
  gray 
  

   (really 
  light 
  buff) 
  style 
  of 
  monkey 
  may 
  range 
  across 
  through 
  the 
  

   lowlands 
  of 
  the 
  Rio 
  San 
  Juan 
  to 
  the 
  vicinity 
  of 
  Lake 
  Managua 
  and 
  

   Lake 
  Nicaragua. 
  It 
  is 
  interesting 
  to 
  note 
  that 
  a 
  very 
  young 
  example 
  

   of 
  front 
  atus 
  as 
  figured 
  by 
  Gray 
  (Zool. 
  Voy. 
  Sulphur, 
  vol. 
  1, 
  No. 
  1, 
  

   Mammalia, 
  pt. 
  1, 
  pi. 
  1, 
  Apr. 
  1843) 
  has 
  essentially 
  the 
  same 
  light-gray 
  

   color 
  pattern 
  as 
  that 
  of 
  the 
  adult 
  of 
  geoffroyi. 
  It 
  is 
  probable 
  that 
  

   the 
  type 
  of 
  geoffroyi 
  came 
  from 
  San 
  Juan 
  del 
  Norte, 
  and 
  for 
  preci- 
  

   sion 
  we 
  restrict 
  the 
  name 
  to 
  the 
  animal 
  that 
  occurs 
  in 
  the 
  vicinity 
  of 
  

   that 
  locality. 
  A 
  specimen 
  from 
  Rio 
  Rana, 
  Gorgon 
  Bay, 
  near 
  San 
  

   Juan 
  del 
  Norte 
  (Sclater, 
  op. 
  cit., 
  p. 
  186, 
  1862) 
  was 
  subsequently 
  listed 
  

   by 
  Gray 
  (Catalogue 
  of 
  monkeys, 
  lemurs 
  and 
  fruit-eating 
  bats 
  in 
  the 
  

   collection 
  of 
  the 
  British 
  Museum, 
  p. 
  43, 
  1870) 
  as 
  ''Ateles 
  hyhridus" 
  

   from 
  "St. 
  Juan, 
  Nicaragua." 
  A 
  very 
  good 
  description 
  of 
  this 
  spider 
  

   monkey, 
  based 
  on 
  field 
  observations, 
  was 
  given 
  by 
  Salvin 
  to 
  Alston 
  

   (Biologia 
  Centrali- 
  Americana, 
  Mammalia, 
  vol. 
  1, 
  pp. 
  9-10, 
  Sept. 
  

   1879). 
  Confusion 
  of 
  the 
  Nicaraguan 
  race 
  with 
  A. 
  hyhridus 
  by 
  Gray 
  

   was 
  undoubtedly 
  due 
  to 
  external 
  resemblance, 
  which 
  is 
  rather 
  strik- 
  

   ing; 
  but 
  cranial 
  characters 
  indicate 
  close 
  alliance 
  with 
  geographic 
  

   neighbors 
  that 
  are 
  markedly 
  different 
  in 
  coloration. 
  A 
  specimen 
  

   (M. 
  C. 
  Z. 
  No. 
  29626) 
  from 
  El 
  Valle 
  del 
  Anton, 
  near 
  the 
  Pacific 
  coast 
  

   east 
  of 
  the 
  Azuero 
  Peninsula 
  in 
  Panama, 
  agrees 
  closely 
  in 
  general 
  

   coloration 
  with 
  those 
  from 
  Nicaragua, 
  but 
  the 
  black 
  on 
  the 
  crown 
  

   patch 
  and 
  on 
  forearms 
  is 
  more 
  extensive. 
  Whether 
  this 
  animal 
  was 
  

   native 
  to 
  the 
  locality 
  or 
  brought 
  from 
  some 
  other 
  region 
  seems 
  some- 
  

   what 
  uncertain. 
  

  

  Speciinens 
  examined. 
  — 
  Total 
  number, 
  10, 
  as 
  follows: 
  Nicaragua: 
  

   Managua, 
  6 
  ; 
  no 
  definite 
  locality, 
  4 
  ( 
  1, 
  A. 
  M. 
  N. 
  H.) 
  . 
  

  

  ATELES 
  GEOFFROYI 
  VELLEROSUS 
  Gray 
  

  

  Mexican 
  Spider 
  Monkey 
  

  

  Ateles 
  vellerosus 
  Gray, 
  Proc. 
  Zool. 
  Soc. 
  London 
  for 
  1865, 
  pt. 
  3, 
  No. 
  47, 
  p. 
  773, 
  

  

  Apr. 
  1866. 
  

   Ateles 
  veUerosus 
  Sclateb, 
  Proc. 
  Zool. 
  Soc. 
  London 
  for 
  1872, 
  pt. 
  1, 
  No. 
  1, 
  p. 
  5, 
  pi. 
  2 
  

  

  (col.), 
  June 
  1S72. 
  (Believed 
  by 
  A. 
  Boucard 
  to 
  have 
  been 
  procured 
  near 
  

  

  Acapulco, 
  Mexico.) 
  

   Ateles 
  neglectus 
  Reinhakdt, 
  Vid. 
  Medd. 
  Nat. 
  Foren. 
  Kjobenbavn, 
  ser. 
  3, 
  vol. 
  4 
  

  

  (1872), 
  Nos. 
  6-9, 
  p. 
  150, 
  1873. 
  Type 
  locality, 
  Mirador, 
  Veracruz, 
  Mexico. 
  

  

  