﻿THE 
  SPIDER 
  MUX 
  KEYS 
  — 
  KELLOGO 
  AND 
  GOLDMAN 
  43 
  

  

  ATELES 
  GEOFFUOYI 
  GRISESCENS 
  Gray 
  

  

  Hooded 
  Spider 
  Monkey 
  

  

  Atclfs 
  griscscens 
  Gray. 
  rroe. 
  Zool. 
  Soc. 
  Lnmloii 
  for 
  1SG5, 
  pt. 
  3, 
  p. 
  732, 
  Apr. 
  1806. 
  

   Atil> 
  s 
  cumJlatu-^ 
  Quay. 
  Troc. 
  Zool. 
  Soe. 
  London 
  for 
  l.S(>"), 
  pt. 
  3, 
  p. 
  733, 
  Apr. 
  ISfiO. 
  

  

  Type 
  locality, 
  unknown. 
  

   Atclvs 
  oucullatiis 
  Sclatix, 
  rmc. 
  Zool. 
  Soc. 
  London 
  for 
  1871, 
  pt. 
  1, 
  p. 
  223, 
  pi. 
  14 
  

  

  (col.), 
  June 
  1871. 
  

   Alclct 
  mclatiochir 
  Sclater, 
  Proc. 
  Z<iol. 
  Soc. 
  London 
  for 
  1875, 
  pt. 
  3, 
  p. 
  419, 
  pi. 
  49 
  

  

  (col.), 
  Oct. 
  1875. 
  

  

  Type 
  7o(?a7^7^/.— 
  Unknown. 
  [Here 
  restricted 
  to 
  Rio 
  Tuyra, 
  south- 
  

   eastern 
  Panama.] 
  

  

  7\)/pe 
  si>eci77un. 
  — 
  Bi-iti.-«li 
  Aruseum 
  ( 
  Xatural 
  History) 
  No. 
  . 
  

  

  D'.Mtributioj}. 
  — 
  Presumably 
  the 
  valley 
  of 
  Rio 
  Tuyra 
  and 
  probably 
  

   southeastward 
  through 
  the 
  Serrania 
  del 
  Sapo 
  of 
  extreme 
  southeastern 
  

   Panama 
  and 
  the 
  Cordillera 
  do 
  Baudo 
  of 
  northwestern 
  Colombia. 
  

  

  Gineral 
  characters. 
  — 
  Adults 
  apparently 
  characterized 
  l)y 
  long, 
  lax 
  

   pelage 
  and 
  peculiar 
  du.sky 
  coloration, 
  with 
  a 
  general 
  admixture 
  of 
  

   yellowish 
  gray 
  or 
  golden 
  hairs, 
  the 
  hairs 
  on 
  upperparts 
  golden 
  at 
  the 
  

   base. 
  The 
  skull 
  indicates 
  close 
  relationship 
  to 
  panarrieiisis^ 
  despite 
  the 
  

   contrast 
  in 
  the 
  deep 
  reddish 
  color 
  of 
  the 
  latter. 
  

  

  Color 
  (type 
  of 
  nwuU-atufi). 
  — 
  Skin 
  around 
  orbits 
  and 
  on 
  nose 
  bare 
  

   and 
  of 
  a 
  browni.sh 
  flesh 
  color 
  with 
  darker 
  freckles 
  intermixed; 
  cheeks 
  

   and 
  lower 
  jaw 
  nearly 
  bare 
  of 
  hair, 
  but 
  .skin 
  more 
  decidedly 
  of 
  a 
  black 
  

   shade 
  (Murie, 
  Proc. 
  Zool. 
  Soc. 
  London 
  for 
  18G5, 
  pt. 
  3, 
  p. 
  739, 
  Apr. 
  18G6) 
  . 
  

   Hairs 
  very 
  long 
  and 
  lax, 
  those 
  on 
  head 
  projecting 
  forward 
  over 
  fore- 
  

   head; 
  crown 
  and 
  neck 
  black; 
  rest 
  of 
  body 
  above 
  and 
  below, 
  limbs, 
  and 
  

   tail 
  black 
  intermixed 
  with 
  yellowish-gray 
  or 
  golden 
  hairs, 
  so 
  numer- 
  

   ous 
  as 
  to 
  give 
  a 
  pale 
  yellowish-brown 
  coloration 
  to 
  back 
  (not 
  far 
  

   removed 
  from 
  color 
  on 
  the 
  bases 
  of 
  the 
  hairs 
  in 
  similar 
  parts 
  of 
  A. 
  

   f/riJiescens) 
  ; 
  hands 
  and 
  feet 
  black, 
  bases 
  of 
  hairs 
  on 
  hands 
  golden, 
  but 
  

   not 
  on 
  those 
  of 
  feet 
  which 
  are 
  black 
  to 
  the 
  roots 
  (Elliot. 
  A 
  review 
  of 
  

   the 
  Primates, 
  vol. 
  2, 
  pp. 
  38-39, 
  June 
  1913). 
  Barbour 
  (Journ. 
  Mam- 
  

   malogj'. 
  vol. 
  13, 
  Xo. 
  4, 
  pp. 
  307-3G8, 
  Nov. 
  1932) 
  lias 
  conunented 
  on 
  the 
  

   .skin 
  and 
  skull 
  of 
  a 
  spider 
  monk(n' 
  (M. 
  C. 
  Z. 
  No. 
  27490) 
  obtained 
  at 
  

   Chepigana 
  in 
  Darien. 
  Panama. 
  In 
  this 
  inunature 
  specimen, 
  the 
  entire 
  

   upperj)arts, 
  including 
  (he 
  outer 
  .surfaces 
  of 
  fore 
  and 
  hind 
  limbs 
  as 
  well 
  

   as 
  the 
  upl)er 
  surface 
  of 
  the 
  tail, 
  are 
  dusky, 
  the 
  darker 
  hairs 
  nearly 
  sooty 
  

   black 
  on 
  the 
  distal 
  two-thirds 
  and 
  thinly 
  interspersed 
  with 
  these 
  on 
  

   head, 
  neck, 
  back, 
  thighs, 
  and 
  upper 
  surface 
  of 
  tail 
  are 
  old 
  gold 
  or 
  silvery 
  

   hairs; 
  the 
  cf)loration 
  of 
  the 
  uj)perparts 
  is 
  further 
  modified 
  by 
  a 
  lighter 
  

   sulTusion 
  resulting 
  from 
  (he 
  old-gold 
  color 
  of 
  the 
  basal 
  third 
  of 
  these 
  

   liairs 
  showing 
  through. 
  A 
  partially 
  concealed 
  bulfy 
  spot 
  is 
  present 
  on 
  

   the 
  forehead. 
  Tlie 
  thrf)at 
  and 
  chest 
  are 
  thiidy 
  covered 
  with 
  sooty 
  

   black 
  hairs. 
  On 
  the 
  belly, 
  inner 
  surfa<-es 
  of 
  hind 
  limbs, 
  and 
  under 
  

   surface 
  of 
  tail 
  the 
  hairs 
  art- 
  ilull 
  ciniiamon-bufT 
  tipped 
  with 
  sooty 
  

  

  