﻿MAMMALS 
  OF 
  NORTHERN 
  COLOMBIA 
  — 
  HERSHKOVITZ 
  369 
  

  

  CEBUS 
  ALBIFRONS 
  ADUSTUS, 
  new 
  subspecies 
  

  

  [?] 
  Cebus 
  apella 
  leztcocephalus, 
  Osgood, 
  Publ. 
  Field 
  Mus. 
  Nat. 
  Hist., 
  zool. 
  ser., 
  

   vol. 
  10, 
  p. 
  66, 
  1912 
  (El 
  Panorama, 
  Rio 
  Aurare, 
  Venezuela). 
  — 
  Cabrera, 
  Rev. 
  

   Real 
  Acad. 
  Cienc, 
  Madrid, 
  vol. 
  16, 
  ser. 
  2, 
  p. 
  230, 
  1917. 
  

  

  Holotype.— 
  Adult 
  male, 
  skin 
  and 
  skull, 
  C.N.H.M. 
  No. 
  22194; 
  col- 
  

   lected 
  February 
  22, 
  1920, 
  by 
  W. 
  H. 
  Osgood 
  and 
  H. 
  B. 
  Conover; 
  

   original 
  number 
  5141, 
  

  

  Type 
  locality. 
  — 
  Near 
  head 
  of 
  Rio 
  Cogollo 
  (Ap6n) 
  at 
  eastern 
  base 
  of 
  

   Sierra 
  de 
  Perijd, 
  about 
  5 
  kilometers 
  northwest 
  of 
  Machiques, 
  Lake 
  

   Maracaibo 
  region, 
  Zulia, 
  Venezuela; 
  altitude 
  about 
  100 
  meters 
  above 
  

   sea 
  level. 
  

  

  Distribution. 
  — 
  Known 
  only 
  from 
  type 
  locality; 
  range 
  probably 
  

   extends 
  across 
  the 
  northern 
  half 
  of 
  the 
  Sierra 
  de 
  Perijd 
  in 
  Venezuela 
  

   and 
  Colombia. 
  

  

  Characters. 
  — 
  Paler 
  throughout 
  than 
  leucocephalus; 
  limbs 
  redder, 
  

   more 
  sharply 
  contrasted 
  with 
  trunk 
  than 
  in 
  malitiosus. 
  Cap 
  Cinna- 
  

   mon-Brown; 
  median 
  dorsal 
  region 
  Sayal 
  Brown 
  anteriorly, 
  becoming 
  

   Tawny 
  posteriorly; 
  forearm 
  and 
  foreleg 
  Russet 
  to 
  Burnt 
  Sienna 
  

   strongly 
  contrasted 
  with 
  back 
  and 
  Sayal 
  Brown 
  of 
  sides; 
  hairs 
  of 
  

   belly 
  and 
  lower 
  part 
  of 
  chest 
  Mars 
  Orange 
  to 
  Burnt 
  Sienna, 
  of 
  upper 
  

   part 
  of 
  chest 
  ochraceous 
  with 
  buffy 
  bases 
  ; 
  pale 
  area 
  of 
  front 
  extending 
  

   to 
  upper 
  part 
  of 
  shoulder. 
  

  

  Coloration 
  of 
  holotype. 
  — 
  Cap 
  Cinnamon-Brown, 
  anterior 
  portion 
  of 
  

   back 
  Sayal 
  Brown, 
  posterior 
  portion 
  Tawny; 
  sides, 
  lateral 
  fringe, 
  and 
  

   outer 
  side 
  of 
  upper 
  arm, 
  Sayal 
  Brown, 
  forearm 
  nearly 
  imiformly 
  Rus- 
  

   set; 
  hand 
  above 
  Russet 
  edged 
  with 
  buffy, 
  fingers 
  with 
  grayish 
  hairs. 
  

   Thigh 
  and 
  foreleg 
  Burnt 
  Sienna 
  becoming 
  nearly 
  Chestnut 
  on 
  upper 
  

   surface 
  of 
  foot, 
  toes 
  with 
  mixed 
  buffy 
  and 
  dark 
  brown 
  hairs. 
  Hairs 
  

   of 
  belly 
  and 
  lower 
  part 
  of 
  chest 
  Mars 
  Orange 
  and 
  Burnt 
  Sienna, 
  of 
  

   upper 
  part 
  of 
  chest 
  and 
  axillae, 
  buffy 
  with 
  Ochraceous-Orange 
  tips. 
  

   Tail 
  above 
  hoar-frosted 
  in 
  appearance, 
  the 
  hairs 
  Cinnamon-Brown 
  

   tipped 
  with 
  buffy, 
  beneath 
  Mars 
  Orange 
  proximally 
  becoming 
  

   Ochraceous-Orange 
  to 
  buffy 
  terminally. 
  

  

  One 
  adult 
  male 
  paratopotype 
  like 
  holotype 
  but 
  slightly 
  paler 
  on 
  

   back, 
  chest, 
  and 
  tail; 
  hind 
  legs 
  slightly 
  redder. 
  

  

  Measurements. 
  — 
  Those 
  of 
  the 
  holotype 
  followed 
  by 
  those 
  of 
  a 
  male 
  

   and 
  female 
  topotype: 
  Greatest 
  length 
  of 
  skull, 
  94.7, 
  91.8, 
  87.9; 
  con- 
  

   dylobasal 
  length, 
  70.5, 
  67.1, 
  63.3; 
  zygomatic 
  breadth, 
  67.0, 
  61.5, 
  57.0; 
  

   width 
  of 
  brain 
  case, 
  51.1, 
  50.3, 
  48.8 
  ; 
  length 
  of 
  brain 
  case, 
  75.0, 
  75.1 
  , 
  71 
  .7 
  ; 
  

   orbital 
  breadth, 
  52.9, 
  51.6, 
  46.3; 
  greatest 
  width 
  across 
  maxillary 
  tooth 
  

   rows, 
  28.6, 
  27.4, 
  26.6; 
  length, 
  upper 
  canine 
  to 
  M^ 
  26.3, 
  26.4, 
  24.7; 
  

   length, 
  lower 
  canine 
  to 
  M3, 
  29.5, 
  28.8, 
  27.3; 
  mandibular 
  depth 
  at 
  

   condyle, 
  30.4, 
  26.3, 
  24.0 
  mm. 
  

  

  Remarks. 
  — 
  C. 
  a. 
  adustus 
  differs 
  in 
  a 
  comparatively 
  small 
  degree 
  

   from 
  its 
  nearest 
  relative, 
  malitiosus 
  of 
  the 
  Sierra 
  Nevada 
  de 
  Santa 
  

  

  