﻿LASIOPYGA 
  355 
  

  

  Cercopithecus 
  erxlebeni 
  var. 
  nigripes 
  Gray, 
  Cat. 
  Monkeys, 
  Lemurs 
  

   and 
  Fruit-eating 
  Bats, 
  Brit. 
  Mus., 
  1870, 
  p. 
  23. 
  

  

  Cercopithecus 
  pogonias 
  Schleg., 
  Mus. 
  Pays-Bas, 
  Simiae, 
  1876, 
  p. 
  

   82, 
  (Part.). 
  

  

  Cercopithecus 
  grayi 
  nigripes 
  Pocock, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  II, 
  

   1907, 
  p. 
  713. 
  

  

  BLACK-FOOTED 
  GUENON. 
  

  

  Type 
  locality. 
  Gaboon, 
  West 
  Africa. 
  

  

  Color. 
  Yellowish 
  white 
  band 
  on 
  forehead 
  between 
  eyes 
  extending 
  

   backward 
  on 
  sides 
  of 
  crown 
  nearly 
  to 
  occiput; 
  sides 
  of 
  head 
  between 
  

   eyes 
  and 
  ears, 
  and 
  middle 
  of 
  crown 
  jet 
  black; 
  a 
  few 
  yellow 
  speckles 
  on 
  

   crown; 
  occiput, 
  hind 
  neck, 
  and 
  between 
  shoulders 
  speckled 
  black 
  and 
  

   yellow; 
  middle 
  of 
  back 
  tawny 
  ochraceous 
  and 
  black 
  speckled, 
  rest 
  of 
  

   back 
  to 
  tail 
  jet 
  black; 
  flanks 
  gray, 
  speckled 
  on 
  apical 
  portion 
  of 
  hairs 
  

   with 
  black 
  and 
  white; 
  outer 
  side 
  of 
  arms 
  and 
  hands 
  black 
  speckled 
  

   near 
  shoulder 
  with 
  white 
  ; 
  legs 
  gray 
  annulated 
  towards 
  tip 
  with 
  black 
  

   and 
  white 
  ; 
  feet 
  black 
  ; 
  cheeks 
  and 
  whiskers 
  buff 
  yellow 
  ; 
  entire 
  under 
  

   parts 
  and 
  inner 
  side 
  of 
  limbs 
  orange 
  buff; 
  tail 
  above 
  black, 
  beneath 
  

   ochraceous 
  rufous 
  for 
  two 
  thirds 
  the 
  length 
  where 
  it 
  grades 
  into 
  black 
  ; 
  

   above 
  black 
  for 
  the 
  entire 
  length 
  ; 
  ear 
  tufts 
  ochraceous 
  buff. 
  

  

  Measurements. 
  Total 
  length, 
  1,160; 
  tail, 
  710; 
  foot, 
  125. 
  Skull: 
  

   total 
  length, 
  85; 
  occipito-nasal 
  length, 
  74; 
  intertemporal 
  width, 
  42.5; 
  

   Hensel, 
  57.6; 
  zygomatic 
  width, 
  60; 
  width 
  of 
  braincase, 
  53.6; 
  median 
  

   length 
  of 
  nasals, 
  16 
  ; 
  palatal 
  length, 
  30.3 
  ; 
  length 
  of 
  upper 
  molar 
  series, 
  

   23.5 
  ; 
  length 
  of 
  mandible, 
  54.2 
  ; 
  length 
  of 
  lower 
  molar 
  series, 
  27.6. 
  

  

  Similar 
  to 
  L. 
  pogonias, 
  but 
  dorsal 
  stripe 
  broader 
  and 
  not 
  so 
  dark. 
  

  

  Lasiopyga 
  grayi 
  (Fraser). 
  

  

  Cercopithecus 
  grayi 
  Fras., 
  Cat. 
  Knowsl. 
  Coll., 
  1850, 
  p. 
  8 
  

   Gray, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1868, 
  p. 
  182; 
  Id. 
  Cat 
  

   Monkeys, 
  Lemurs 
  and 
  Fruit-eating 
  Bats, 
  Brit. 
  Mus., 
  1870, 
  p 
  

   22, 
  (Part.) 
  ; 
  Sclat., 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1893, 
  p. 
  256; 
  1896 
  

   p. 
  484; 
  Matschie, 
  Sitzungsb. 
  Gesell. 
  Naturf. 
  Freunde, 
  Berlin 
  

   1893, 
  p. 
  214; 
  Forbes, 
  Handb. 
  Primates, 
  II, 
  1894, 
  p. 
  77, 
  pi 
  

   XXIII 
  ; 
  Pocock, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  II, 
  1907, 
  p. 
  712. 
  

  

  Cercopithecus 
  erxlebeni 
  Dahlb. 
  et 
  Pucher., 
  Rev. 
  Mag. 
  Zool., 
  1856, 
  

   p. 
  96; 
  1857, 
  p. 
  196; 
  Dahlb., 
  Stud. 
  Zool. 
  Fam. 
  Reg. 
  Anim. 
  

   Natur., 
  fasc. 
  I, 
  1856, 
  pp. 
  102, 
  106; 
  Reichenb., 
  Vollstand. 
  

   Naturg. 
  Affen, 
  1862, 
  p. 
  110; 
  Gray, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  

   1868, 
  p. 
  182; 
  Id. 
  Cat. 
  Monkeys, 
  Lemurs 
  and 
  Fruit-eating 
  

   Bats, 
  Brit. 
  Mus., 
  1870, 
  p. 
  23 
  ; 
  Sclat., 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  

  

  