﻿LASIOPYGA 
  359 
  

  

  This 
  remarkable 
  monkey 
  has 
  been 
  lately 
  described 
  by 
  Dr. 
  But- 
  

   tikofer 
  (1. 
  c.). 
  It 
  differs 
  from 
  all 
  the 
  Guenons 
  in 
  the 
  peculiar 
  colora- 
  

   tion 
  of 
  the 
  head 
  and 
  the 
  narrow 
  central 
  hairy 
  crest. 
  The 
  type, 
  and 
  

   two 
  living 
  individuals, 
  one 
  in 
  the 
  Royal 
  Zoological 
  Gardens 
  at 
  Antwerp, 
  

   and 
  one 
  in 
  the 
  possession 
  of 
  Mr. 
  L. 
  Ruhe 
  at 
  Alfeld, 
  are 
  the 
  only 
  

   examples 
  known. 
  

  

  Subgenus 
  7. 
  Insignicebus. 
  

  

  A 
  conspicuous 
  white 
  collar 
  about 
  neck, 
  sometimes 
  present. 
  

  

  KEY 
  TO 
  THE 
  SPECIES 
  AND 
  SUBSPECIES. 
  

  

  A. 
  With 
  white 
  collar. 
  

  

  a. 
  Without 
  ear 
  tufts 
  ; 
  inner 
  side 
  of 
  limbs 
  white. 
  . 
  .L. 
  albitorquata. 
  

  

  b. 
  With 
  ear 
  tufts. 
  

  

  a! 
  Lower 
  back 
  dark 
  ochraceous 
  rufous 
  and 
  

  

  black 
  speckled 
  L. 
  kolbi. 
  

  

  b! 
  Lower 
  back 
  yellowish 
  brown 
  L. 
  k. 
  nubila. 
  

  

  c.' 
  Lower 
  back 
  burnt 
  sienna 
  and 
  black 
  speckled. 
  L. 
  k. 
  hindei. 
  

  

  B, 
  No 
  white 
  collar. 
  

  

  a. 
  Aural 
  region 
  not 
  red 
  or 
  reddish. 
  

  

  a.' 
  Tail 
  not 
  white 
  on 
  one 
  third 
  of 
  length 
  

   beneath. 
  

  

  a." 
  Lower 
  back 
  speckled 
  with 
  ochra- 
  

   ceous 
  and 
  black, 
  no 
  red 
  at 
  root 
  of 
  

   tail 
  L. 
  albigularis. 
  

  

  b" 
  Lower 
  back 
  speckled 
  cream 
  buff 
  and 
  

  

  black 
  L. 
  a. 
  beirensis. 
  

  

  c." 
  Lower 
  back 
  speckled 
  with 
  reddish 
  

  

  yellow, 
  red 
  at 
  root 
  of 
  tail 
  *L. 
  a. 
  kinobotensis. 
  

  

  d." 
  Lower 
  back 
  speckled 
  with 
  reddish 
  

  

  orange 
  and 
  black 
  L. 
  ruHlata. 
  

  

  e." 
  Lower 
  back 
  speckled 
  with 
  reddish 
  

  

  chestnut 
  and 
  black 
  L. 
  moloneyi. 
  

  

  f." 
  Lower 
  back 
  speckled 
  with 
  ochra- 
  

   ceous 
  buff 
  and 
  black 
  L. 
  franccscce. 
  

  

  g" 
  Lower 
  back 
  speckled 
  with 
  reddish 
  

  

  cinnamon 
  and 
  black 
  L. 
  prcussi. 
  

  

  *I 
  cannot 
  be 
  certain 
  that 
  this 
  is 
  the 
  proper 
  place 
  for 
  this 
  form. 
  

  

  