﻿360 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.98 
  

  

  — 
  ; 
  24.6, 
  25.4; 
  length, 
  lower 
  canine 
  to 
  M3, 
  30.5, 
  29.2; 
  27.2, 
  26.7; 
  

   mandibular 
  depth 
  at 
  condyle, 
  27.3, 
  26.7; 
  27.9, 
  27.4 
  mm. 
  

  

  Colonia 
  Agricola 
  de 
  Caracolicito 
  (4 
  males, 
  3 
  females) 
  : 
  Median 
  dorsal 
  

   region, 
  forearm 
  and 
  foreleg 
  Ochraceous-Tawny 
  to 
  Cinnamon-Brown 
  

   mixed 
  with 
  Tawny; 
  belly 
  silvery 
  to 
  Ochraceoiis-Orange. 
  Paler 
  speci- 
  

   mens 
  agree 
  with 
  dry 
  season 
  "pale 
  phase" 
  individuals 
  of 
  topotypical 
  

   cesarae, 
  the 
  darker 
  specimens 
  grade 
  into 
  malitiosus. 
  All 
  individuals 
  

   retain 
  to 
  a 
  greater 
  or 
  lesser 
  degree 
  the 
  orangeous 
  tinge 
  of 
  forearm 
  and 
  

   foreleg 
  characteristic 
  of 
  cesarae. 
  Hairs 
  of 
  upper 
  surface 
  of 
  tail 
  in 
  one 
  

   female 
  with 
  apical 
  banding 
  resembling 
  in 
  an 
  ill 
  defined 
  manner 
  the 
  

   hoar-frosted 
  appearance 
  of 
  tail 
  in 
  males. 
  

  

  Measurements. 
  — 
  Those 
  of 
  two 
  adult 
  males 
  followed 
  by 
  those 
  of 
  two 
  

   adult 
  females: 
  Head 
  and 
  body, 
  405, 
  436; 
  418, 
  403; 
  tail 
  468, 
  441; 
  463, 
  

   450; 
  hmd 
  foot, 
  123, 
  123; 
  119, 
  124; 
  ear, 
  37, 
  42; 
  37, 
  40; 
  greatest 
  length 
  

   of 
  skull, 
  94.6, 
  96.4; 
  91.6, 
  93.3; 
  condylobasal 
  length, 
  71.7, 
  75.3; 
  67.6, 
  

   68.9; 
  zygomatic 
  breadth, 
  63.2, 
  65.3; 
  59.5, 
  59.5; 
  width 
  of 
  brain 
  case, 
  

   51.2, 
  53.5; 
  50.3, 
  50.9; 
  length 
  of 
  brain 
  case, 
  76.9, 
  75.9; 
  73.0, 
  73.6; 
  or- 
  

   bital 
  breadth, 
  53.0, 
  53.4; 
  51.0, 
  52.2; 
  greatest 
  width 
  across 
  maxillary 
  

   tooth 
  rows, 
  28.8, 
  30.7; 
  28.4, 
  28.2; 
  length; 
  upper 
  canine 
  to 
  M^, 
  26.9, 
  

   26.8; 
  25.3, 
  24.6; 
  length, 
  lower 
  canine 
  to 
  M3, 
  30.0, 
  30.6; 
  27.2, 
  27.7; 
  

   mandibular 
  depth 
  at 
  condyle, 
  27.4, 
  30.1; 
  26.1, 
  25.6 
  mm. 
  

  

  Remarks. 
  — 
  Micos 
  of 
  the 
  Cesar 
  Valley 
  proper 
  differ 
  notably 
  from 
  

   all 
  others. 
  The 
  specimens 
  taken 
  there 
  represent 
  individuals 
  of 
  various 
  

   clans 
  and, 
  with 
  the 
  exception 
  of 
  the 
  Villanueva 
  monkeys, 
  interbreed- 
  

   ing 
  between 
  these 
  groups 
  could 
  easily 
  be 
  effected. 
  On 
  the 
  other 
  hand, 
  

   each 
  of 
  the 
  series 
  from 
  the 
  eastern 
  and 
  southern 
  slopes 
  of 
  the 
  Sierra 
  

   Nevada 
  de 
  Santa 
  Marta 
  are 
  members 
  of 
  clans 
  which 
  now 
  may 
  have 
  

   little 
  if 
  any 
  association 
  with 
  those 
  of 
  the 
  Cesar. 
  Their 
  characters 
  

   show 
  gradation 
  into 
  malitiosus 
  of 
  the 
  western 
  slope 
  of 
  the 
  Sierra 
  

   Nevada. 
  

  

  Specimens 
  examined. 
  — 
  Sixty. 
  El 
  Orinoco 
  and 
  Rio 
  Guaimaral, 
  Rio 
  

   Cesar, 
  42 
  (U.S.N.M.); 
  Villanueva, 
  4 
  (U.S.N.M.); 
  El 
  Salado 
  7 
  (U.S. 
  

   N.M.); 
  Colonia 
  Agricola 
  de 
  Caracolicito, 
  7 
  (U.S.N.M.). 
  

  

  CEBUS 
  ALBIFRONS 
  PLEEI, 
  new 
  subspecies 
  

  

  Cebus 
  chrysopus, 
  auctorum 
  (nee 
  Lesson 
  and 
  sajou 
  d 
  pieds 
  doris 
  Cuvier). 
  

   Cebus 
  albifrons, 
  Elliot, 
  A 
  review 
  of 
  the 
  Primates, 
  vol. 
  2, 
  p. 
  88, 
  1913 
  (part; 
  

   Colombia) 
  . 
  

  

  Holotype.— 
  Adult 
  male, 
  skin 
  and 
  skull, 
  U.S.N.M. 
  No. 
  281624; 
  

   collected 
  May 
  29, 
  1943, 
  by 
  Philip 
  Hershkovitz; 
  original 
  number 
  

   2029. 
  

  

  Type 
  locality. 
  — 
  Swamplands 
  of 
  western 
  bank 
  of 
  Rio 
  Magdalena 
  

   near 
  village 
  of 
  Norosi 
  at 
  base 
  of 
  northern 
  extremity 
  of 
  Cordillera 
  

   Central, 
  Momp6s, 
  department 
  of 
  Bolivar, 
  Colombia; 
  altitude 
  ap- 
  

   proximately 
  50 
  meters. 
  

  

  