﻿THE 
  SPIDEK 
  MONKEYS 
  KELLOGG 
  AND 
  GOLDMAN 
  39 
  

  

  ATELES 
  GEOFFROYI 
  ORNATUS 
  Gray 
  

  

  Costa 
  Rica 
  Ornate 
  Spider 
  Monkey 
  

  

  Hrlcs 
  ornatuK 
  Guay, 
  Cntalopiie 
  of 
  monkeys, 
  It'inurs 
  and 
  frnit-catitif; 
  l)ats 
  in 
  the 
  

   collection 
  of 
  the 
  British 
  Museum, 
  p. 
  44, 
  1870. 
  

  

  7'i/pc 
  locality. 
  — 
  Unknown. 
  [Here 
  restricted 
  to 
  Cual)ro, 
  Tahunanca 
  

   region, 
  southeastern 
  Costa 
  Kica.] 
  

  

  Type 
  apecimen. 
  — 
  British 
  Museum 
  (Natural 
  History) 
  No. 
  . 
  

  

  Distribution. 
  — 
  Eastern 
  sh)pe 
  of 
  central 
  cordillera 
  of 
  Costa 
  Rica; 
  

   doubtless 
  intergrading 
  ^vith 
  panamensis 
  on 
  Pacific 
  side 
  of 
  the 
  central 
  

   mountain 
  range. 
  

  

  General 
  characters. 
  — 
  A 
  dark 
  golden-yellowish 
  subspecies, 
  the 
  upper- 
  

   parts 
  in 
  strong 
  light 
  having 
  a 
  glossy, 
  golden-yellow 
  sheen, 
  owing 
  to 
  the 
  

   yellowish 
  subterminal 
  bands 
  of 
  hairs. 
  Resembling 
  panamensis 
  of 
  

   I*anama 
  and 
  western 
  Costa 
  Rica 
  but 
  brighter, 
  more 
  golden 
  yellowish 
  in 
  

   tone, 
  the 
  back, 
  however, 
  more 
  obscured 
  by 
  overlying 
  black-tip])ed 
  hairs, 
  

   throat 
  lighter, 
  underside 
  of 
  tail 
  and 
  inner 
  side 
  of 
  upper 
  arm 
  lacking 
  the 
  

   deep 
  '"ferruginous" 
  of 
  panamensis. 
  Differs 
  from 
  frontatus 
  of 
  Guana- 
  

   caste, 
  northwestern 
  Costa 
  Rica, 
  in 
  greater 
  extension 
  of 
  black 
  area 
  on 
  

   limbs 
  and 
  over 
  back 
  of 
  neck 
  and 
  shoulders, 
  and 
  black-tipped 
  hairs 
  

   overlying 
  and 
  tending 
  to 
  modify 
  the 
  golden-yellowish 
  tones 
  on 
  back. 
  

   Contrasting 
  strongly 
  in 
  golden 
  yellowish, 
  instead 
  of 
  light 
  bully 
  colora- 
  

   tion, 
  with 
  geofroyi 
  of 
  the 
  coast 
  region 
  of 
  southeastern 
  Nicaragua. 
  

  

  Color. 
  — 
  Face, 
  top 
  of 
  head, 
  forearms 
  all 
  around, 
  outer 
  sides 
  of 
  legs, 
  

   hands, 
  and 
  feet 
  black; 
  upperpai-ts 
  from 
  shoulders 
  to 
  hips 
  and 
  base 
  of 
  

   tail 
  glossy 
  golden-yellow 
  or 
  apricot 
  buff, 
  varying 
  in 
  some 
  specimens 
  

   to 
  cinnamon-rufous, 
  more 
  or 
  less 
  overlaid 
  with 
  blackish 
  hairs; 
  chest 
  

   near 
  cinnamon-bull", 
  the 
  rest 
  of 
  underparts 
  and 
  Hanks 
  becoming 
  near 
  

   tawny 
  or 
  cinnamon-rufous, 
  this 
  general 
  color 
  extending 
  down 
  along 
  

   inner 
  sides 
  of 
  legs 
  in 
  some 
  sperimens 
  nearly 
  to 
  ankles; 
  throat 
  and 
  under- 
  

   side 
  of 
  neck 
  near 
  pinkisli 
  buff; 
  tail 
  black 
  ai)<)ve, 
  more 
  or 
  less 
  mixed 
  

   with 
  tawny 
  below 
  from 
  base 
  to 
  near 
  callosity. 
  

  

  S/ntll. 
  — 
  About 
  like 
  that 
  of 
  panamensis-^ 
  similar 
  to 
  thai 
  of 
  geoffroyi., 
  

   but 
  apparently 
  .somewhat 
  larger. 
  

  

  M 
  eajturemenis. 
  — 
  No 
  external 
  measurement 
  s 
  ava 
  i 
  lable. 
  Skull 
  : 
  Three 
  

   adult 
  males 
  from 
  Talamanca 
  i-cgion. 
  Costa 
  Rica, 
  resjx'ctivdy 
  : 
  Cxreatest 
  

   length, 
  110.2, 
  111.2. 
  1 
  i:',.H 
  mm. 
  ; 
  ori)ital 
  width, 
  r.:}.;^ 
  (',1.7, 
  C.'i; 
  postorbital 
  

   constriction, 
  45.2, 
  45.7, 
  49.0; 
  width 
  of 
  brain 
  case. 
  Gl.O. 
  58. 
  C1.7; 
  zygo- 
  

   matic 
  bivadth, 
  71.5, 
  CH.2. 
  71.0; 
  maxillary 
  tooth 
  row, 
  27. 
  G, 
  30.f), 
  27.9. 
  

   Average 
  of 
  adult 
  females 
  from 
  Talanianca 
  region, 
  Costa 
  Rica: 
  

   CM-eatest 
  length, 
  108.1 
  (104.5-114.4); 
  orbital 
  width. 
  C.l.G 
  (5G.4-64.1); 
  

   postorbital 
  constriction. 
  47.4 
  (4-1.H-49.1 
  ) 
  ; 
  width 
  of 
  brain 
  case, 
  .5H.7 
  

   (55.7-61.3); 
  zygomatic 
  width, 
  GG.8 
  rG;'..7-70.7) 
  : 
  niaxilhirv 
  tooth 
  i-ow. 
  

   27.5 
  (26.3-29..5). 
  

  

  Rryturrkx. 
  — 
  Much 
  confusion 
  has 
  existed 
  regarding 
  the 
  status 
  of 
  this 
  

   brightly 
  colored 
  sul)species. 
  Specimens 
  that 
  we 
  believe 
  belong 
  here 
  

  

  