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  LAGOTHRIX 
  

  

  GEOGRAPHICAL 
  DISTRIBUTION 
  OF 
  THE 
  SPECIES. 
  

  

  The 
  majority 
  of 
  the 
  species 
  of 
  Lagothrix 
  are 
  found 
  in 
  the 
  

   western 
  portion 
  of 
  Brazil, 
  in 
  the 
  forests 
  cf 
  the 
  Upper 
  Amazon 
  and 
  its 
  

   tributaries. 
  L. 
  lagotricha 
  ranges 
  from 
  the 
  banks 
  of 
  the 
  Rio 
  Gua- 
  

   viare, 
  a 
  branch 
  of 
  the 
  Orinoco, 
  to 
  the 
  district 
  southwest 
  of 
  the 
  Rio 
  

   Negro, 
  and 
  on 
  the 
  Upper 
  Rio 
  Magdalena, 
  Colombia, 
  to 
  Chanchamayo 
  

   in 
  Peru, 
  from 
  which 
  place 
  specimens 
  now 
  in 
  the 
  British 
  Museum 
  were 
  

   brought 
  by 
  Kalinowski. 
  Near 
  the 
  mouth 
  of 
  the 
  Rio 
  Tocantins, 
  Brazil, 
  

   L. 
  cana 
  occurs, 
  and 
  goes 
  westward 
  to 
  the 
  forests 
  watered 
  by 
  the 
  Rio 
  

   Solimoens 
  and 
  Rio 
  Iga. 
  In 
  the 
  mountains, 
  north 
  of 
  Tolima, 
  Ecuador, 
  

   at 
  an 
  elevation 
  of 
  5,000 
  to 
  7,000 
  feet 
  L. 
  lugens 
  was 
  procured 
  ; 
  and 
  on 
  

   the 
  banks 
  of 
  the 
  Rio 
  Copataza, 
  and 
  near 
  Macas 
  in 
  Ecuador, 
  and 
  also 
  in 
  

   the 
  valley 
  of 
  the 
  Peruvian 
  Amazons, 
  L. 
  infumata 
  is 
  found. 
  In 
  the 
  

   forests 
  through 
  which 
  the 
  Rio 
  Juara 
  flows 
  near 
  Barrigudo, 
  L. 
  uberi- 
  

   cola 
  was 
  obtained, 
  extending 
  its 
  range 
  into 
  Peru, 
  and 
  also 
  along 
  the 
  

   Rio 
  Solimoens; 
  and 
  at 
  Callanga, 
  Department 
  of 
  Cuzco, 
  Peru, 
  L. 
  

   thomasi 
  is 
  found. 
  

  

  KEY 
  TO 
  THE 
  SPECIES. 
  

  

  A. 
  Body 
  thick, 
  heavy 
  ; 
  fur 
  woolly 
  ; 
  tail 
  long. 
  

  

  a. 
  General 
  color 
  blackish 
  hoary 
  gray, 
  or 
  bluish 
  

  

  gray 
  L. 
  lagotricha. 
  

  

  b. 
  General 
  color 
  dark 
  purplish 
  brown 
  L. 
  lugens. 
  

  

  c. 
  General 
  color 
  grizzled 
  gray 
  and 
  ochraceous 
  ....L. 
  thomasi. 
  

  

  d. 
  General 
  color 
  grizzled 
  wood 
  brown 
  .... 
  L. 
  ubericola. 
  

  

  e. 
  General 
  color 
  dark 
  reddish 
  brown 
  ; 
  under 
  

  

  parts 
  black 
  L. 
  infumata. 
  

  

  f. 
  General 
  color 
  buffy 
  gray 
  ; 
  under 
  parts 
  ochraceous 
  L. 
  cana. 
  

  

  Lagothrix 
  lagotricha 
  (Humboldt). 
  

  

  Simia 
  lagotricha 
  Humb., 
  Rec. 
  Obs. 
  Zool., 
  I, 
  1811, 
  (1815), 
  pp. 
  

   322, 
  354. 
  

  

  Lagothrix 
  humboldti 
  E. 
  Geoff., 
  Ann. 
  Mus. 
  Hist. 
  Nat. 
  Paris, 
  XIX, 
  

   1812, 
  p. 
  107; 
  Id. 
  Cours 
  Hist. 
  Nat. 
  Mamm, 
  1828, 
  p. 
  35, 
  9me 
  

   Lecon; 
  I. 
  Geoff., 
  Cat. 
  Primates, 
  1851, 
  p. 
  50; 
  Pucher., 
  Rev. 
  

   Mag. 
  Zool., 
  1857, 
  p. 
  292 
  ; 
  Slack, 
  Proc. 
  Acad 
  Nat. 
  Scien. 
  Phil., 
  

   1862, 
  p. 
  514; 
  Reichenb., 
  Vollstand. 
  Naturg. 
  Affen, 
  1862, 
  p. 
  

   78, 
  figs. 
  173, 
  175 
  ; 
  Sclat., 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1863, 
  p. 
  374, 
  

   pi. 
  XXXI; 
  Bates, 
  Nat. 
  Riv. 
  Amaz., 
  II, 
  1863, 
  p. 
  320; 
  von 
  

  

  

  

  