﻿LASIOPYGA 
  341 
  

  

  quite 
  an 
  extensive 
  distribution 
  in 
  the 
  southern 
  part 
  of 
  the 
  continent. 
  

   Dr. 
  Cabrera 
  (1. 
  c.) 
  has 
  endeavored 
  to 
  separate 
  De 
  Lalande's 
  animal 
  

   from 
  Cuvier's 
  species 
  under 
  the 
  name 
  of 
  Cercopithecus 
  pusillus 
  Des- 
  

   moulins, 
  on 
  the 
  ground 
  that 
  L. 
  pygerythra 
  is 
  a 
  green 
  animal 
  and 
  L. 
  

   pusillus 
  a 
  gray 
  one. 
  It 
  is 
  quite 
  evident 
  that 
  Dr. 
  Cabrera 
  is 
  not 
  aware 
  

   of 
  the 
  great 
  variability 
  in 
  shades 
  of 
  color 
  that 
  examples 
  of 
  L. 
  

   pygerythra 
  exhibit, 
  even, 
  as 
  I 
  have 
  already 
  stated, 
  from 
  the 
  same 
  

   locality. 
  I 
  have 
  examined 
  many 
  specimens 
  of 
  this 
  species 
  from 
  

   numerous 
  localities 
  in 
  southern 
  Africa, 
  and 
  have 
  been 
  quite 
  unable 
  to 
  

   find 
  any 
  line 
  of 
  demarcation 
  among 
  them 
  by 
  which 
  more 
  than 
  one 
  

   form 
  could 
  be 
  recognized. 
  We 
  know 
  what 
  the 
  L. 
  pygerythra 
  Cuvier 
  

   is, 
  for 
  the 
  type 
  is 
  in 
  the 
  Paris 
  Museum, 
  but 
  we 
  only 
  know 
  Desmoulins' 
  

   and 
  E. 
  Geoffroy's 
  species 
  by 
  their 
  descriptions, 
  the 
  types 
  having 
  disap- 
  

   peared. 
  The 
  specimens 
  named 
  "lalandi" 
  in 
  the 
  Paris 
  Museum, 
  and 
  

   which 
  we 
  have 
  every 
  reason 
  to 
  suppose 
  were 
  those 
  recognized 
  by 
  the 
  

   earlier 
  French 
  writers 
  as 
  representing, 
  at 
  least, 
  the 
  animal 
  described 
  

   as 
  L. 
  pusillus 
  and 
  L. 
  lalandi, 
  cannot 
  be 
  separated 
  from 
  Cuvier 
  's 
  

   species. 
  It 
  would 
  seem 
  then 
  to 
  be 
  most 
  unwise 
  to 
  attempt 
  to 
  recognize 
  

   two 
  species 
  of 
  this 
  Guenon, 
  for 
  the 
  evidence 
  at 
  present 
  available 
  is 
  

   against 
  it. 
  If 
  the 
  Paris 
  specimens 
  marked 
  lalandi 
  are 
  really 
  that 
  form 
  

   then 
  certainly 
  they 
  may 
  not 
  be 
  separated 
  from 
  Cuvier's 
  species. 
  Un- 
  

   fortunately 
  we 
  cannot 
  be 
  absolutely 
  sure 
  that 
  this 
  is 
  so 
  and 
  never 
  will 
  

   be, 
  for 
  De 
  Lalande's 
  type 
  has 
  disappeared, 
  but 
  we 
  are 
  sure 
  of 
  L. 
  

   pygerythra, 
  and 
  as 
  examples 
  of 
  this 
  species 
  exhibit 
  a 
  varied 
  coloring, 
  

   and 
  the 
  different 
  hues 
  are 
  not 
  confined 
  to 
  examples 
  from 
  any 
  especial 
  

   locality 
  or 
  range, 
  any 
  attempt 
  to 
  separate 
  them 
  into 
  two 
  distinct 
  forms 
  

   would 
  result 
  only 
  in 
  increased 
  confusion. 
  My 
  investigation 
  of 
  these 
  

   specimens 
  does 
  not 
  permit 
  me 
  to 
  accept 
  Dr. 
  Cabrera's 
  conclusions. 
  

  

  Lasiopyga 
  rufoviridis 
  (I. 
  Geoffroy) 
  . 
  

  

  Cercopithecus 
  rufoviridis 
  I. 
  Geoff., 
  Archiv. 
  Mus. 
  Hist. 
  Nat., 
  Paris, 
  

   II, 
  1841, 
  p. 
  504, 
  pi. 
  XXXII; 
  Id. 
  Compt. 
  Rend., 
  XV, 
  1842, 
  p. 
  

   1038; 
  Id. 
  Cat. 
  Primates, 
  1851, 
  p. 
  23 
  ; 
  Dahlb., 
  Stud. 
  Zool. 
  Fam. 
  

   Reg. 
  Anim. 
  Natur., 
  f 
  asc. 
  I, 
  1856, 
  pp. 
  104, 
  108 
  ; 
  Sclat., 
  Proc. 
  

   Zool. 
  Soc. 
  Lond., 
  1860, 
  p. 
  420; 
  1893, 
  p. 
  258; 
  Reichenb., 
  Voll- 
  

   stand. 
  Naturg. 
  Affen, 
  1862, 
  p. 
  113, 
  fig. 
  281; 
  Schleg., 
  Mus. 
  

   Pays-Bas, 
  Simiae, 
  1876, 
  p. 
  78; 
  Forbes, 
  Handb. 
  Primates, 
  II, 
  

   1894, 
  p. 
  65 
  ; 
  Matschie, 
  Sitzungsb. 
  Ges. 
  Naturf 
  . 
  Freunde, 
  Ber- 
  

   lin, 
  1895, 
  p. 
  216; 
  Pocock, 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  II, 
  1907, 
  p. 
  

   737. 
  

  

  Cercopithecus 
  Havidus 
  Peters, 
  Reis. 
  Mossamb., 
  Saugth., 
  1852, 
  p. 
  

  

  