﻿THE 
  SPIDER 
  MONKEYS 
  — 
  KELLOGG 
  AND 
  GOLDMAN 
  21 
  

  

  Atelcs 
  prnblema 
  Schtjcoel 
  MS., 
  in 
  Jontink, 
  Catalogue 
  systi'matique 
  dos 
  mam- 
  

   miferes, 
  Mus. 
  Hist. 
  Nat. 
  Pays-Bas, 
  Leiden, 
  vol. 
  11, 
  p. 
  I-, 
  ]8;»2 
  {nomcn 
  vudiiin). 
  

  

  Type 
  loeaT/fij. 
  — 
  I'nknown. 
  [Iloro 
  restricted 
  to 
  E>ineralda. 
  west 
  of 
  

   (he 
  mouth 
  of 
  Kio 
  Giinpo, 
  on 
  Rio 
  Orinoco, 
  and 
  south 
  of 
  JNIount 
  Duida, 
  

   Venezuela 
  (see 
  Humboldt, 
  Recueil 
  d'observations 
  de 
  zoologie 
  et 
  

   d'anatomie 
  comparee, 
  vol. 
  1, 
  livr. 
  7, 
  p. 
  3'2G, 
  1812).] 
  

  

  Type 
  .ypec'unvn. 
  — 
  A 
  .specimen 
  exhibited 
  at 
  public 
  fairs 
  until 
  alter 
  

   its 
  death, 
  when 
  it 
  passed 
  into 
  the 
  possession 
  of 
  Reaumer, 
  constituted 
  

   the 
  basis 
  of 
  "Le 
  Belzebut" 
  of 
  Brisson 
  (Rcfjnum 
  animale, 
  p. 
  211, 
  1756) 
  ; 
  

   this 
  .stulFed 
  specimen, 
  the 
  description 
  of 
  Builon, 
  and 
  two 
  livin<i: 
  spider 
  

   monkeys 
  in 
  the 
  menagerie 
  were 
  combined 
  as 
  the 
  basis 
  for 
  Geotfroy's 
  

   name. 
  

  

  Distribution. 
  — 
  Ranges 
  in 
  the 
  vast 
  lowlands 
  from 
  near 
  the 
  junction 
  

   of 
  the 
  Rio 
  Orinoco 
  and 
  Rio 
  Caura 
  in 
  central 
  Venezuela* 
  south 
  to 
  the 
  

   valley 
  of 
  the 
  Rio 
  Xegro, 
  westward 
  to 
  Colombia 
  east 
  of 
  the 
  Cordillera 
  

   Oriental 
  (Mambita), 
  Ecuador 
  east 
  of 
  the 
  crest 
  of 
  the 
  Andes, 
  and 
  to 
  

   northeasteni 
  Peru 
  (Sarayacu). 
  

  

  General 
  characters. 
  — 
  Distinguished 
  by 
  unusual 
  color 
  pattern, 
  the 
  

   black 
  upperparts 
  contrasting 
  strongly 
  with 
  i)ale 
  buify 
  undorparts, 
  

   there 
  being 
  a 
  sharp 
  line 
  of 
  demarcation 
  along 
  lower 
  part 
  of 
  sides. 
  

   This 
  marked 
  contrast 
  in 
  coloration 
  extends 
  to 
  the 
  outer 
  and 
  inner 
  sur- 
  

   faces 
  of 
  its 
  liml)s, 
  although 
  these 
  vary 
  in 
  detail, 
  and 
  a 
  triangular 
  fore- 
  

   head 
  patch 
  varying 
  from 
  white 
  to 
  golden 
  or 
  brownish 
  yellow 
  is 
  nor- 
  

   mally 
  but 
  not 
  invariably 
  present. 
  Foot 
  large 
  (190-200 
  mm.) 
  ; 
  tail 
  

   variable 
  in 
  length 
  but 
  often 
  almost 
  twice 
  the 
  length 
  of 
  head 
  and 
  body. 
  

   Dilfers 
  conspicuously 
  in 
  color, 
  but 
  similarity 
  in 
  cranial 
  details 
  indi- 
  

   cates 
  close 
  relationship 
  to 
  hyhridus 
  of 
  Colombia. 
  Differs 
  notably 
  from 
  

   A. 
  panlsru.<i 
  poftiscu.s 
  of 
  French 
  Guiana 
  in 
  much 
  slioi-tcr 
  polago 
  and 
  in 
  

   contrasting 
  colors 
  of 
  upper 
  parts 
  and 
  underparts. 
  

  

  Color. 
  — 
  Face 
  and 
  eyebrows 
  black, 
  a 
  triangular 
  forehead 
  patch 
  vary- 
  

   ing 
  from 
  white 
  to 
  golden, 
  yellow, 
  or 
  brownish 
  yellow 
  (occasionally 
  

   entirely 
  ab.'^ent 
  or 
  more 
  or 
  less 
  hidden 
  by 
  stiff 
  uj)t 
  iirned 
  black 
  hairs 
  over 
  

   eyes 
  and 
  opposing 
  black 
  frontal 
  tuft 
  from 
  crown) 
  ; 
  crown 
  cap 
  and 
  

   upperparts 
  generally 
  black 
  to 
  a 
  sharp 
  line 
  of 
  demarcation 
  with 
  under- 
  

   j)arts 
  (in 
  some 
  individuals 
  the 
  black 
  hairs 
  under 
  strong 
  light 
  have 
  a 
  

   .seal-brown 
  tinge) 
  ; 
  underparts, 
  in 
  general, 
  including 
  inner 
  surfaces 
  of 
  

   fore 
  anfl 
  hind 
  limi)s, 
  and 
  underside 
  of 
  tail 
  varying 
  from 
  cinnamon-bufT, 
  

   yellow, 
  or 
  dull 
  cream-buff 
  to 
  pale 
  olive-buff; 
  side 
  whiskers 
  on 
  face, 
  

   when 
  present, 
  whitish 
  or 
  buffy 
  (absent 
  in 
  some 
  specimens) 
  ; 
  ou(<'i- 
  

   surfaces 
  of 
  foi-elimbs 
  to 
  elltows 
  black; 
  outer 
  surfaces 
  of 
  forearms 
  to 
  

   wri.sts 
  generally 
  bbicjcish, 
  liut 
  occasioiuilly 
  similar 
  to 
  undeiparts 
  and 
  

   intermixed 
  with 
  long 
  dusky 
  overhairs. 
  Outer 
  surface,s 
  of 
  liind 
  limbs 
  

   usually 
  blackisli 
  to 
  knees 
  or 
  1)elow, 
  but 
  in 
  some 
  specimens 
  (j)articularly 
  

   in 
  eastern 
  part 
  of 
  range) 
  the 
  outer 
  suifaces 
  of 
  jiind 
  limbs, 
  as 
  well 
  as 
  

   thighs 
  and 
  region 
  arf)und 
  base 
  of 
  tail, 
  are 
  distinctly 
  st 
  law-colored 
  in 
  

  

  