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  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  VOL. 
  98 
  

  

  Figure 
  59. 
  — 
  Distribution 
  of 
  tamarins, 
  genus 
  Marikina, 
  found 
  in 
  Colombia 
  and 
  Panama. 
  

   Inset, 
  type 
  localities 
  of 
  bare-faced 
  tamarins: 
  1, 
  Marikina 
  {Oedipomidas) 
  geoffroyi; 
  2, 
  

   Marikina 
  (Oedipomidas) 
  oedipus; 
  3, 
  Marikina 
  {Marikina) 
  leucopus; 
  4, 
  Marikina 
  (Mari- 
  

   kina) 
  bicolor; 
  5, 
  Marikina 
  (Marikina) 
  martinsi. 
  

  

  Measurements. 
  — 
  Means 
  and 
  extremes 
  of 
  25 
  adults 
  (11 
  males 
  and 
  

   14 
  females, 
  all 
  from 
  Norosi, 
  Bolivar) 
  : 
  Head 
  and 
  body, 
  243 
  (224-283) 
  

   tail, 
  383 
  (341-417); 
  hind 
  foot 
  (with 
  claw), 
  74 
  (66-80); 
  ear 
  (from 
  

   notch), 
  27 
  (24-30) 
  ; 
  greatest 
  length 
  of 
  skull, 
  50.6 
  (46.4-53.3); 
  zygo- 
  

   matic 
  breadth, 
  33.9 
  (31.6-36.0); 
  across 
  orbital 
  rings, 
  27.7 
  (26.1-29.2); 
  

   width 
  of 
  brain 
  case, 
  27.9 
  (27.1-29.2); 
  distance 
  across 
  auditory 
  bullae 
  

   from 
  meatus, 
  22.7 
  (21.8-23.7); 
  croAvn 
  length 
  of 
  upper 
  molar 
  row, 
  9.7 
  

   (9.0-10.3): 
  crown 
  width 
  of 
  upper 
  first 
  molar. 
  3.3 
  (3.1-3.4) 
  mm. 
  

  

  Remarks. 
  — 
  There 
  are 
  no 
  apparent 
  differences 
  between 
  sexes. 
  Juve- 
  

   nals 
  and 
  adults 
  show 
  the 
  same 
  range 
  of 
  variation 
  in 
  color. 
  Super- 
  

   ficially, 
  leucopus 
  resembles 
  martinsi 
  in 
  color 
  of 
  nape 
  and 
  back. 
  The 
  

   tail 
  of 
  martinsi, 
  however, 
  is 
  sharply 
  bicolor, 
  limbs 
  more 
  ochraceous, 
  

   ventral 
  smiace 
  of 
  body 
  more 
  yellow, 
  less 
  red. 
  Skull 
  of 
  leucopus 
  is 
  

  

  