﻿THE 
  SPIDER 
  MONKEYS 
  — 
  KELLOGG 
  AND 
  GOLDMAN 
  25 
  

  

  Xo. 
  2"), 
  p. 
  T. 
  July 
  18, 
  1040) 
  iwords 
  this 
  monkey 
  from 
  Marai 
  on 
  the 
  

   right 
  bunk 
  of 
  the 
  Rio 
  Tapajoz, 
  and 
  Bates 
  (The 
  naturalist 
  on 
  the 
  

   river 
  Amazona, 
  p. 
  217, 
  IST;")) 
  found 
  it 
  at 
  Aracu 
  on 
  the 
  Rio 
  Cupary, 
  a 
  

   tributary 
  of 
  the 
  Rio 
  Tapajoz. 
  It 
  was 
  found 
  by 
  Sieber 
  at 
  Cametii 
  on 
  

   the 
  left 
  bank 
  of 
  Rio 
  Tocantins. 
  

  

  Specimens 
  e.vamhird. 
  — 
  Tt)tal 
  number. 
  3, 
  as 
  follows: 
  Brazil: 
  Caxi- 
  

   ricatuba, 
  east 
  bank 
  of 
  Rio 
  Tapajoz, 
  a 
  few 
  miles 
  below 
  Tauary, 
  Pani, 
  

   1 
  (M. 
  C. 
  Z.) 
  ; 
  no 
  definite 
  locality, 
  2 
  (1, 
  C. 
  M.). 
  

  

  ATELES 
  BELZEBUTH 
  HYBRIDUS 
  I. 
  Geoffrey 
  

  

  Hybrid 
  Spider 
  Monkey 
  

  

  Atclcfi 
  hi/hridiis 
  I. 
  Gvxhfroy, 
  Mem. 
  Mus. 
  Hist. 
  Nat. 
  I'aris. 
  vol. 
  17, 
  p. 
  168. 
  1829. 
  

  

  Aides 
  albifrons 
  (Jeay. 
  Catalogue 
  of 
  monkeys, 
  lemurs 
  and 
  fruit-eating 
  bats 
  in 
  the 
  

   collection 
  of 
  the 
  British 
  Museum, 
  p. 
  44, 
  1870. 
  Type 
  locality. 
  South 
  America. 
  

  

  [Atclcn 
  bclscbnth] 
  bnunieus 
  Gr-w, 
  Catalogue 
  of 
  monkeys, 
  lemurs 
  and 
  fruit- 
  

   eating 
  bats 
  in 
  the 
  collection 
  of 
  the 
  British 
  Museum, 
  p. 
  44, 
  1870. 
  Type 
  locality, 
  

   "Brazil." 
  

  

  Amcr-anihropoidrs 
  Joysi 
  Montandon, 
  Comptes 
  Rendus 
  Acad. 
  Sci., 
  I'aris, 
  vol. 
  1S8, 
  

   No. 
  11, 
  p. 
  S17, 
  Mar. 
  11, 
  1929. 
  Type 
  locality, 
  left 
  affluent 
  of 
  upper 
  Kio 
  Tarra, 
  

   a 
  tributary 
  of 
  tiie 
  liio 
  Catatumbo, 
  which 
  flows 
  into 
  Lake 
  Maracaibo, 
  Vene- 
  

   zuela. 
  

  

  Type 
  locality. 
  — 
  Valley 
  of 
  Rio 
  Mao;dalena, 
  Colombia. 
  Here 
  re- 
  

   .<5trictcd 
  to 
  La 
  Gloria 
  on 
  the 
  Rio 
  Magdalena, 
  southern 
  ]\Iagdalena 
  De- 
  

   j)artment, 
  Colombia. 
  

  

  Type 
  specimen. 
  — 
  Cotypes, 
  2 
  male?5 
  and 
  1 
  female, 
  Museum 
  National 
  

   d' 
  Histoire 
  Naturelle, 
  Paris; 
  presented 
  by 
  M. 
  Plee 
  in 
  182C. 
  

  

  Distribution. 
  — 
  Serrania 
  de 
  Valledupar 
  (Las 
  Marimondas) 
  and 
  

   southward 
  along 
  the 
  Rio 
  Cesar 
  to 
  the 
  Rio 
  Magdalena 
  (Puerto 
  

   Estrella), 
  and 
  south 
  in 
  the 
  Cordillera 
  Oriental 
  at 
  least 
  to 
  latitude 
  6° 
  

   N. 
  in 
  Santander 
  (Bolivar), 
  Colombia. 
  

  

  General 
  cluiraeters. 
  — 
  Distinguished 
  by 
  wood-brown 
  general 
  colora- 
  

   tion 
  of 
  upperparts 
  and 
  a 
  while 
  triangular 
  forehead 
  patch. 
  Apparently 
  

   clo-sely 
  allied 
  to 
  helzebuth 
  of 
  Venezuela, 
  but 
  contrasting 
  strongly 
  in 
  

   brownish 
  in.stead 
  of 
  black 
  upperjiart.s. 
  Differs 
  from 
  its 
  geographic 
  

   neighbor, 
  A. 
  jiiaciceps 
  rohuntuH., 
  of 
  western 
  Colombia, 
  in 
  brownish 
  up- 
  

   perparts 
  and 
  white 
  forehead 
  patch 
  instead 
  of 
  nearly 
  all 
  black 
  colora- 
  

   tion, 
  larger 
  foot, 
  and 
  cranial 
  details. 
  

  

  Color. 
  — 
  Face 
  and 
  upturned 
  hail's 
  on 
  anterior 
  part 
  of 
  forehead 
  just 
  

   above 
  eyes 
  black, 
  partially 
  concealing 
  a 
  white 
  triangular 
  forehead 
  

   patch; 
  coloi-ation 
  of 
  ui)perj)arts 
  in 
  general 
  wood 
  brown, 
  darker 
  on 
  

   head 
  and 
  upper 
  back, 
  becoming 
  lighter 
  and 
  near 
  avellaneous 
  on 
  lumbar 
  

   region 
  and 
  hips; 
  outer 
  surfaces 
  of 
  forelimbs, 
  thighs, 
  and 
  upperside 
  of 
  

   tail 
  wood 
  brown; 
  underparts, 
  inner 
  surfaces 
  of 
  fore 
  and 
  hind 
  limbs, 
  

   and 
  under 
  surface 
  of 
  tail 
  whiti.sh 
  or 
  buify 
  ; 
  siilc 
  whiskers 
  on 
  face 
  vary- 
  

   ing 
  from 
  whiti.sh 
  or 
  buffy 
  to 
  daik 
  wood 
  brown. 
  

  

  Skull. 
  — 
  About 
  as 
  in 
  hrlzrhuth. 
  Similar 
  to 
  that 
  of 
  A. 
  pani^sciis 
  panis- 
  

   cus 
  but 
  variable, 
  the 
  premaxillae 
  in 
  some 
  individuals 
  less 
  ])roduced 
  

  

  