﻿322 
  LASIOPYGA 
  

  

  LASIOPYGA 
  INOBSERVATA 
  (Elliot). 
  

  

  Cercopithecus 
  inobservatus 
  Elliot, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  V, 
  8th 
  

   Ser., 
  1910, 
  p. 
  81. 
  

  

  Type 
  locality. 
  West 
  Africa, 
  exact 
  locality 
  unknown. 
  Type 
  in 
  

   British 
  Museum. 
  

  

  Genl. 
  Char. 
  Allied 
  to 
  L. 
  cephus, 
  but 
  body 
  very 
  differently 
  

   colored, 
  and 
  with 
  a 
  conspicuous 
  rufous 
  band 
  on 
  brow 
  behind 
  the 
  

   yellow 
  and 
  black 
  superciliary 
  line. 
  When 
  the 
  two 
  species 
  are 
  placed 
  

   side 
  by 
  side 
  L. 
  cephus 
  appears 
  a 
  reddish 
  monkey, 
  and 
  L. 
  inobservata 
  

   a 
  yellowish 
  animal. 
  

  

  Color. 
  A 
  rufous 
  colored 
  brow 
  band, 
  having 
  a 
  superciliary 
  line 
  in 
  

   front, 
  and 
  top 
  of 
  head 
  behind 
  yellowish, 
  the 
  hairs 
  being 
  banded 
  with 
  

   orange 
  ochraceous 
  and 
  black, 
  the 
  tips 
  being 
  black, 
  but 
  the 
  ochraceous 
  

   bands 
  give 
  the 
  dominant 
  hue; 
  remainder 
  of 
  head 
  on 
  top 
  black, 
  hairs 
  

   tipped 
  with 
  yellow, 
  entire 
  rest 
  of 
  upper 
  parts, 
  shoulders 
  and 
  thighs 
  

   ochraceous, 
  much 
  paler 
  and 
  less 
  red 
  than 
  the 
  same 
  parts 
  of 
  L. 
  cephus, 
  

   the 
  hairs 
  being 
  pale 
  gray 
  at 
  base 
  and 
  then 
  banded 
  with 
  black 
  and 
  

   ochraceous 
  and 
  tipped 
  with 
  black. 
  Black 
  band 
  from 
  eye 
  to 
  ear 
  ; 
  sides 
  

   of 
  face 
  beneath, 
  black 
  and 
  yellow 
  ; 
  cheeks, 
  and 
  a 
  broad 
  line 
  down 
  sides 
  

   of 
  face 
  black, 
  hairs 
  banded 
  with 
  yellowish 
  white; 
  hairs 
  on 
  lips 
  and 
  

   chin 
  black 
  ; 
  throat 
  grayish 
  white 
  ; 
  entire 
  under 
  parts, 
  inner 
  side 
  of 
  arms 
  

   to 
  elbows, 
  and 
  legs 
  to 
  ankles, 
  dark 
  smoke 
  gray, 
  much 
  darker 
  than 
  L. 
  

   cephus 
  ; 
  forearms, 
  hands 
  and 
  feet 
  blackish, 
  sparsely 
  speckled 
  with 
  pale 
  

   yellow; 
  tail 
  above 
  with 
  basal 
  portion 
  like 
  back, 
  then 
  blackish 
  maroon 
  

   grading 
  into 
  pale 
  bright 
  red, 
  beneath 
  gray 
  at 
  base 
  grading 
  into 
  pale 
  red. 
  

   Ex 
  type 
  British 
  Museum. 
  

  

  Measurements. 
  Total 
  length, 
  1,330; 
  tail, 
  750; 
  foot, 
  145. 
  Skull: 
  

   total 
  length, 
  119.6; 
  occipito-nasal 
  length, 
  90.7; 
  intertemporal 
  width, 
  

   40.9; 
  breadth 
  of 
  braincase, 
  56.8; 
  Hensel, 
  79; 
  zygomatic 
  width, 
  73.2; 
  

   palatal 
  length, 
  41.5 
  ; 
  length 
  of 
  upper 
  canines, 
  20 
  ; 
  length 
  of 
  upper 
  molar 
  

   series, 
  25.5 
  ; 
  length 
  of 
  mandible, 
  78.3 
  ; 
  length 
  of 
  lower 
  molar 
  series, 
  

   32.2. 
  Ex 
  type 
  British 
  Museum. 
  

  

  In 
  the 
  description 
  of 
  this 
  species 
  the 
  following 
  comments 
  were 
  

   made: 
  

  

  "The 
  skull 
  when 
  compared 
  with 
  the 
  skull 
  of 
  a 
  male 
  L. 
  cephus 
  of 
  

   a 
  corresponding 
  age, 
  is 
  seen 
  to 
  have 
  a 
  considerably 
  greater 
  total 
  length, 
  

   longer 
  and 
  more 
  protruding 
  rostrum, 
  and 
  longer 
  and 
  broader 
  braincase 
  

   posteriorly. 
  The 
  orbits 
  are 
  quite 
  a 
  different 
  shape, 
  more 
  circular 
  than 
  

   oblong, 
  and 
  the 
  extreme 
  width 
  greater. 
  The 
  teeth 
  are 
  much 
  larger, 
  

   and 
  the 
  upper 
  molar 
  series 
  longer 
  by 
  nearly 
  the 
  width 
  of 
  the 
  first 
  pre- 
  

  

  