﻿LASIOPYGA 
  297 
  

  

  Subgenus 
  1. 
  Allochrocebus. 
  

  

  General 
  color 
  various, 
  size 
  small. 
  

  

  KEY 
  TO 
  THE 
  SPECIES. 
  

  

  A. 
  Head 
  black 
  speckled. 
  

  

  a, 
  Brow 
  band 
  indistinct, 
  white; 
  ruff 
  on 
  sides 
  of 
  

  

  throat 
  white 
  L. 
  Vhoesti. 
  

  

  b. 
  Brow 
  band 
  ochraceous 
  rufous 
  ; 
  no 
  ruff 
  on 
  sides 
  

  

  of 
  throat 
  L. 
  insolita. 
  

  

  Lasiopyga 
  l'hoesti 
  (Sclater). 
  

  

  Cercopithecus 
  Vhoesti 
  Sclat., 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1898, 
  p. 
  586, 
  

   pi. 
  XLVIII 
  ; 
  Pocock, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  II, 
  1907, 
  p. 
  714, 
  

   pi. 
  XLI, 
  fig. 
  2. 
  

  

  L'HOESTS 
  GUENON. 
  

  

  Type 
  locality. 
  Congoland. 
  Type 
  in 
  British 
  Museum. 
  

  

  Geogr. 
  Distr. 
  Unknown. 
  

  

  Genl. 
  Char. 
  Remarkable 
  for 
  its 
  black 
  head 
  and 
  elongate 
  white 
  

   ruff 
  on 
  sides 
  of 
  throat. 
  

  

  Color. 
  Face 
  black; 
  scattered 
  black 
  hairs 
  on 
  nose 
  and 
  lips; 
  sides 
  

   of 
  face 
  covered 
  with 
  short 
  white 
  and 
  black 
  hairs, 
  longest 
  in 
  a 
  line 
  below 
  

   eyes, 
  and 
  running 
  back 
  to 
  whiskers 
  ; 
  head, 
  neck, 
  space 
  between 
  shoul- 
  

   ders, 
  and 
  sides 
  of 
  body 
  jet 
  black 
  speckled 
  with 
  white; 
  very 
  narrow, 
  

   rather 
  indistinct 
  white 
  line 
  on 
  forehead; 
  sides 
  of 
  head 
  sparsely 
  

   speckled 
  with 
  white, 
  none 
  at 
  all 
  about 
  temples; 
  dorsal 
  region, 
  from 
  

   between 
  shoulders 
  to 
  tail, 
  speckled 
  black 
  and 
  ochraceous 
  rufous 
  ; 
  

   shoulders, 
  arms, 
  legs, 
  hands, 
  feet, 
  under 
  parts 
  of 
  body 
  and 
  inner 
  side 
  

   of 
  limbs 
  jet 
  black; 
  whiskers 
  long, 
  directed 
  upwards 
  and 
  backwards 
  

   concealing 
  the 
  ears, 
  and 
  together 
  with 
  the 
  front, 
  sides 
  of 
  neck 
  and 
  

   throat, 
  continuing 
  to 
  a 
  point 
  on 
  the 
  chest, 
  white 
  with 
  a 
  slight 
  tinge 
  of 
  

   gray 
  ; 
  nose 
  black 
  ; 
  tail, 
  speckled 
  white 
  and 
  black 
  all 
  around, 
  tip 
  black. 
  

   Ex 
  type 
  British 
  Museum. 
  

  

  Measurements. 
  Total 
  length, 
  1,080; 
  tail, 
  600; 
  foot, 
  110. 
  Skull: 
  

   total 
  length, 
  98; 
  intertemporal 
  width, 
  44.7; 
  occipito-nasal 
  length, 
  81.6; 
  

   Hensel, 
  65; 
  zygomatic 
  width, 
  64.4; 
  median 
  length 
  of 
  nasals, 
  15.7; 
  

   palatal 
  length, 
  36.5 
  ; 
  length 
  of 
  upper 
  molar 
  series, 
  27.5 
  ; 
  length 
  of 
  man- 
  

   dible, 
  63 
  ; 
  length 
  of 
  lower 
  molar 
  series, 
  32.2. 
  Ex 
  type 
  Gardens 
  of 
  the 
  

   Zoological 
  Society 
  of 
  London. 
  

  

  