﻿THE 
  SPIDER 
  MONKEYS 
  KELLOGG 
  AND 
  GOLDMAN 
  31 
  

  

  T'lpc 
  local'itij. 
  — 
  Unknown 
  [Here 
  restricted 
  to 
  San 
  Juan 
  del 
  Norte 
  

   (Gi-eytown), 
  Nicaragua; 
  see 
  '•'•AteJc^ 
  hyhrulus''' 
  Sclater, 
  Proc. 
  Zool. 
  

   Soc. 
  London 
  for 
  1862, 
  pt. 
  2, 
  No. 
  12, 
  p. 
  186, 
  Sept. 
  1862 
  (specimen 
  from 
  

   Rio 
  R.ina, 
  Gorgon 
  Bay. 
  near 
  San 
  Juan 
  del 
  Xorte) 
  : 
  and 
  Salvin 
  In 
  

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

   1879.] 
  

  

  Type 
  specimen. 
  — 
  Female 
  adult, 
  jVIuscum 
  National 
  d'Histoire 
  Natu- 
  

   relle, 
  Paris 
  (menagerie 
  specimen 
  acquired 
  in 
  1819; 
  see 
  I. 
  (icollroy, 
  

   Catalogue 
  methodique 
  de 
  la 
  collection 
  des 
  mammiferes, 
  pt. 
  1 
  (Cata- 
  

   logue 
  des 
  Primates), 
  p. 
  49, 
  1851.) 
  

  

  Distribution. 
  — 
  Coastal 
  region 
  bordering 
  San 
  Juan 
  del 
  Norte 
  or 
  Ma- 
  

   rina 
  Bay, 
  southeastern 
  Nicaragua; 
  probably 
  ranging 
  across 
  through 
  

   the 
  lowlands 
  to 
  the 
  Pacific 
  coast. 
  

  

  General 
  characters. 
  — 
  Distinguished 
  by 
  light 
  bulY, 
  overlaid 
  with 
  

   dusky 
  tipped 
  hairs, 
  in 
  general 
  coloration; 
  dark 
  markings 
  on 
  head 
  and 
  

   limbs 
  variable 
  and 
  inconspicuous 
  as 
  a 
  rule. 
  Most 
  closely 
  resembling 
  

   frantatus 
  of 
  northwestern 
  Costa 
  Rica, 
  but 
  lighter 
  and 
  dark 
  markings 
  

   much 
  more 
  restricted. 
  Contrasts 
  strongly 
  with 
  omatus 
  of 
  eastern 
  

   Costa 
  Rica 
  in 
  light 
  buff 
  instead 
  of 
  rich 
  rufescent 
  coloration. 
  Differs 
  

   from 
  .1. 
  fusciceps 
  rohiLstus 
  of 
  eastern 
  Panama 
  and 
  western 
  Colombia 
  

   in 
  diverse 
  instead 
  of 
  nearly 
  uniform 
  black 
  coloration. 
  

  

  Color. 
  — 
  Face 
  and 
  eyebrows 
  varjnng 
  from 
  blackish 
  to 
  a 
  mixture 
  of 
  

   black 
  and 
  buffy 
  hairs, 
  those 
  on 
  the 
  brows 
  directed 
  upward 
  to 
  form 
  a 
  

   thin 
  ruff; 
  top 
  of 
  head 
  thinly 
  overlaid 
  with 
  blackish 
  or 
  brownish 
  hairs 
  

   directed 
  forward, 
  the 
  under 
  color 
  usually 
  light 
  buff. 
  Crown 
  cap 
  

   gi'ading 
  from 
  black 
  to 
  buff 
  tinged 
  with 
  brownish; 
  stiff 
  long 
  black 
  

   hairs 
  above 
  eyes 
  concealing 
  to 
  variable 
  extent 
  the 
  white 
  or 
  buff 
  tri- 
  

   angular 
  forehead 
  patch 
  ; 
  upperside 
  of 
  neck, 
  entire 
  dorsal 
  area, 
  upper- 
  

   part 
  of 
  arms 
  all 
  around 
  and 
  of 
  legs 
  to 
  ankles 
  all 
  around, 
  except 
  knees, 
  

   light 
  buff 
  tliinly 
  intermixed 
  with 
  long 
  black 
  or 
  brownish 
  hairs; 
  nar- 
  

   low 
  areas 
  usually 
  extending 
  2 
  or 
  3 
  inches 
  up 
  and 
  down 
  over 
  knees 
  

   black, 
  the 
  hairs 
  black 
  to 
  roots, 
  but 
  in 
  one 
  specimen 
  the 
  knee 
  patches 
  are 
  

   limited 
  to 
  a 
  few 
  overlying 
  dusky 
  hairs; 
  elbows 
  and 
  outer 
  sides 
  of 
  

   forearms 
  more 
  or 
  less 
  distinctly 
  blackish; 
  throat 
  and 
  sides 
  of 
  face 
  

   and 
  neck 
  silky 
  light 
  buff 
  to 
  light 
  ochraceous-buff 
  ; 
  underparts 
  dull 
  

   liglil 
  buff; 
  hands 
  and 
  feet 
  blackish; 
  tail 
  above 
  about 
  like 
  back, 
  below 
  

   .somewhat 
  paler 
  along 
  basal 
  portion, 
  but 
  with 
  a 
  narrow 
  line 
  of 
  dusky 
  

   hairs 
  bordering 
  callosity 
  jiear 
  tip. 
  In 
  one 
  specimen 
  all 
  the 
  darker 
  

   areas 
  are 
  reduced 
  and 
  the 
  general 
  pelage 
  is 
  suffused 
  with 
  liglit 
  oclira- 
  

   ceous-buff, 
  iMH-oming 
  near 
  cinnamon-buff 
  on 
  inguinal 
  icgioii. 
  lu 
  an- 
  

   other 
  individual 
  small 
  cinnamon-buir 
  ai-cas 
  appear 
  on 
  shouldei-s, 
  inner 
  

   sides 
  o[ 
  wrists, 
  sides 
  of 
  feet, 
  and 
  n<'ar 
  middle 
  of 
  underside 
  oi 
  tail. 
  

  

  SkitJl. 
  — 
  Very 
  similar 
  to 
  that 
  of 
  ornntxiH 
  but 
  apparently 
  smalhr. 
  

  

  Mra,'<vrrmrnt}<. 
  — 
  No 
  external 
  measurements 
  available. 
  Skvll 
  : 
  An 
  

   adult 
  and 
  a 
  subadult 
  fenialo 
  from 
  Nicaragua, 
  resi)ectively 
  : 
  Greatest 
  

  

  