﻿ATELEUS 
  45 
  

  

  various 
  names. 
  Top 
  of 
  head 
  and 
  upper 
  part 
  of 
  tail 
  buff 
  ; 
  a 
  patch 
  of 
  

   erect 
  hairs 
  on 
  forehead 
  black; 
  ring 
  around 
  eyes 
  and 
  lips 
  flesh 
  color, 
  

   rest 
  of 
  face 
  black; 
  upper 
  and 
  lower 
  parts 
  of 
  body 
  light 
  grayish 
  drab; 
  

   hands, 
  elbows, 
  feet, 
  knees, 
  and 
  apical 
  portion 
  of 
  tail 
  above 
  black. 
  Ex 
  

   type 
  in 
  Paris 
  Museum. 
  

  

  This 
  is 
  also 
  the 
  A. 
  melanochir 
  style 
  described 
  by 
  Desmarest 
  from 
  

   the 
  same 
  specimen 
  that 
  served 
  Kuhl 
  for 
  his 
  type 
  of 
  A. 
  geoffroyi. 
  A. 
  

   ornatus 
  Gray, 
  has 
  the 
  face 
  black, 
  the 
  base 
  of 
  hairs 
  on 
  head 
  yellowish, 
  

   on 
  forehead 
  and 
  nape 
  all 
  black 
  or 
  brownish 
  black 
  ; 
  whiskers 
  pale 
  red- 
  

   dish 
  yellow, 
  upper 
  part 
  of 
  back 
  and 
  shoulders 
  Vandyke 
  brown, 
  hairs 
  

   tipped 
  with 
  golden; 
  rest 
  of 
  back, 
  flanks, 
  inner 
  side 
  of 
  arms 
  above 
  

   elbows, 
  and 
  inner 
  side 
  of 
  thighs 
  and 
  base 
  of 
  tail 
  beneath, 
  brownish 
  

   red 
  ; 
  under 
  parts 
  reddish, 
  rest 
  of 
  arms, 
  outer 
  side 
  of 
  legs, 
  hands, 
  feet 
  

   and 
  upper 
  parts 
  of 
  thighs, 
  and 
  tail 
  above 
  black. 
  This 
  description 
  is 
  

   from 
  Gray's 
  type 
  in 
  the 
  British 
  Museum. 
  

  

  Between 
  this 
  style 
  and 
  the 
  typical 
  one 
  all 
  kinds 
  of 
  gradations 
  are 
  

   found, 
  some 
  of 
  the 
  most 
  extreme 
  character, 
  such 
  as 
  grayish 
  drab 
  upper 
  

   parts, 
  or 
  a 
  cream 
  color 
  on 
  the 
  under 
  parts. 
  Specimens 
  of 
  A. 
  ornatus 
  in 
  

   the 
  British 
  Museum 
  vary 
  considerably 
  from 
  the 
  type, 
  being 
  much 
  

   lighter 
  above 
  the 
  shoulders 
  where 
  they 
  are 
  yellowish 
  brown, 
  and 
  in 
  no 
  

   place 
  does 
  the 
  red 
  color 
  attain 
  the 
  depth 
  exhibited 
  in 
  the 
  type. 
  Other 
  

   specimens 
  have 
  the 
  upper 
  part 
  of 
  back 
  dark 
  brown, 
  grading 
  into 
  a 
  

   yellowish 
  brown 
  on 
  lowest 
  back 
  and 
  sides, 
  and 
  under 
  parts 
  yellowish 
  

   gray. 
  The 
  type 
  of 
  A. 
  albifrons 
  Gray 
  has 
  a 
  yellowish 
  white 
  line 
  on 
  the 
  

   forehead 
  continued 
  by 
  a 
  few 
  straggling 
  hairs 
  on 
  sides 
  of 
  face 
  to 
  mouth 
  ; 
  

   upper 
  parts 
  dark 
  brown 
  grading 
  into 
  drab 
  and 
  whitish 
  brown 
  on 
  rump, 
  

   yellowish 
  gray 
  beneath; 
  tail 
  dark 
  brown 
  like 
  upper 
  part 
  of 
  back; 
  a 
  

   variation 
  of 
  the 
  A. 
  melanochir 
  or 
  typical 
  A. 
  geoffroyi 
  style. 
  The 
  

   type 
  of 
  A. 
  albifrons 
  is 
  stated 
  on 
  the 
  ticket 
  as 
  from 
  Medillen, 
  and 
  a 
  

   specimen 
  from 
  Bogota 
  is 
  almost 
  exactly 
  like 
  it 
  but 
  has 
  no 
  white 
  on 
  

   the 
  forehead. 
  The 
  extreme 
  of 
  the 
  different 
  coloring 
  among 
  individual 
  

   specimens 
  if 
  considered 
  by 
  themselves 
  might 
  be 
  readily 
  regarded 
  as 
  

   indicating 
  distinct 
  forms, 
  but 
  a 
  series 
  of 
  examples 
  soon 
  disposes 
  of 
  

   any 
  such 
  view, 
  and 
  they 
  can 
  only 
  be 
  considered 
  as 
  representing 
  the 
  

   changeable 
  styles 
  of 
  coloration 
  exhibited 
  by 
  a 
  species 
  subject 
  to 
  

   extreme 
  variations. 
  

  

  Measurements. 
  Skull: 
  total 
  length, 
  117; 
  occipito-nasal 
  length. 
  

   103; 
  Hensel, 
  79; 
  zygomatic 
  width, 
  76; 
  intertemporal 
  width, 
  51 
  ; 
  palatal 
  

   length, 
  33; 
  breadth 
  of 
  braincase, 
  64; 
  median 
  length 
  of 
  nasals, 
  21; 
  

  

  