﻿8 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.98 
  

  

  FF. 
  Crown 
  cap 
  black, 
  not 
  tawny-olive, 
  yellowish 
  wood 
  brown, 
  or 
  with 
  hairs 
  

   tipped 
  with 
  burnt 
  umber 
  ; 
  underparts 
  conspicuously 
  lighter 
  in 
  color 
  

   than 
  upperparts, 
  line 
  of 
  demarcation 
  between 
  upperparts 
  and 
  under- 
  

   parts 
  being 
  sharply 
  defined 
  ; 
  general 
  coloration 
  of 
  crown 
  cap 
  on 
  head 
  

   as 
  well 
  as 
  rest 
  of 
  upperparts 
  black 
  ; 
  in 
  some 
  individuals 
  these 
  black 
  

   hairs 
  under 
  strong 
  light 
  having 
  a 
  seal-brown 
  tinge 
  ; 
  triangular 
  fore- 
  

   head 
  patch 
  yellow, 
  golden, 
  brownish 
  yellow, 
  or 
  white 
  (occasionally 
  

   either 
  entirely 
  absent 
  or 
  more 
  or 
  less 
  hidden 
  by 
  anterior 
  stiff 
  black 
  

   hairs) 
  ; 
  side 
  whiskers 
  on 
  face, 
  when 
  present, 
  whitish 
  or 
  huffy 
  (not 
  

   present 
  in 
  some 
  specirtfens) 
  ; 
  outer 
  surfaces 
  of 
  forelimbs 
  to 
  elbows 
  

   black 
  ; 
  outer 
  surfaces 
  of 
  forearms 
  to 
  wrists 
  generally 
  blackish 
  but 
  

   occasionally 
  similar 
  to 
  underparts 
  and 
  intermixed 
  with 
  long 
  dusky 
  

   overhairs 
  ; 
  outer 
  surfaces 
  of 
  hind 
  limbs 
  usually 
  blackish 
  to 
  knees 
  or 
  

   below, 
  but 
  in 
  some 
  specimens 
  (particularly 
  in 
  eastern 
  part 
  of 
  range) 
  

   outer 
  surfaces 
  of 
  hind 
  limbs, 
  including 
  thighs 
  and 
  region 
  around 
  base 
  

   of 
  tail, 
  distinctly 
  straw-colored 
  in 
  ground 
  color 
  overlaid 
  with 
  sparse 
  

   long 
  black 
  hairs 
  (not 
  numerous 
  enough 
  to 
  affect 
  general 
  ground 
  color) 
  ; 
  

   hairs 
  on 
  throat 
  normally 
  black, 
  sometimes 
  grayish, 
  more 
  or 
  less 
  

   concealed 
  by 
  black 
  hairs 
  ; 
  remainder 
  of 
  underparts, 
  inner 
  surfaces 
  

   of 
  fore 
  and 
  hind 
  limbs, 
  as 
  well 
  as 
  under 
  surface 
  of 
  tail, 
  yellow, 
  

   cinnamon-buff, 
  dull 
  cream-buff, 
  or 
  pale 
  olive-buff; 
  tail 
  normally 
  

   bicolored, 
  upper 
  surface 
  being 
  black 
  and 
  under 
  surface 
  similar 
  to 
  

   that 
  of 
  underparts 
  (in 
  occasional 
  specinfens 
  upper 
  surface 
  of 
  tail 
  

   approximately 
  same 
  as 
  that 
  of 
  under 
  surface 
  but 
  more 
  heavily 
  inter- 
  

   spersed 
  with 
  long 
  black 
  overhairs) 
  ; 
  foot 
  large 
  (length, 
  heel 
  to 
  end 
  

   longest 
  toe, 
  190-200 
  mm.) 
  ; 
  tail 
  variable 
  in 
  length 
  but 
  often 
  almost 
  

   twice 
  length 
  of 
  head 
  and 
  body. 
  (From 
  near 
  junction 
  of 
  Rio 
  Caura 
  

   with 
  Rio 
  Orinoco 
  in 
  Venezuela 
  south 
  to 
  Rio 
  Negro 
  in 
  Brazil, 
  westward 
  

   to 
  Colombia 
  east 
  of 
  Cordillera 
  Oriental 
  (Mambita), 
  Ecuador 
  east 
  of 
  

  

  Andes, 
  and 
  northeastern 
  Peru.) 
  belzebuth. 
  

  

  AA. 
  General 
  coloration 
  of 
  entire 
  back 
  not 
  chiefly 
  (jet) 
  black. 
  

  

  O. 
  A 
  conspicuous 
  white 
  triangular 
  forehead 
  patch 
  ; 
  general 
  coloration 
  of 
  i:pper- 
  

   parts 
  wood 
  brown, 
  darker 
  on 
  head 
  and 
  upper 
  back 
  and 
  lighter 
  on 
  lumbar 
  

   region 
  and 
  thighs 
  ; 
  underparts, 
  inner 
  surfaces 
  of 
  fore 
  and 
  hind 
  limbs, 
  and 
  

   under 
  surface 
  of 
  tail 
  whitish 
  or 
  buffy 
  ; 
  side 
  whiskers 
  on 
  face 
  variable, 
  

   sometimes 
  whitish 
  or 
  buffy 
  and 
  sometimes 
  dark 
  wood 
  brown. 
  (Magda- 
  

  

  lena 
  River 
  Valley 
  and 
  adjacent 
  mountains, 
  Colombia.) 
  hybridus 
  

  

  GO. 
  No 
  conspicuous 
  white 
  triangular 
  forehead 
  patch 
  ; 
  general 
  coloration 
  of 
  

   upperparts 
  not 
  wood 
  brown. 
  

   H. 
  General 
  coloration 
  of 
  upperparts, 
  except 
  for 
  head 
  and 
  shoulders 
  on 
  some 
  

   individuals, 
  tending 
  toward 
  light 
  mahogany 
  red 
  ; 
  underside 
  of 
  tail, 
  at 
  

   least 
  on 
  basal 
  half, 
  deep 
  cinnamon-rufous 
  to 
  ferruginous 
  ; 
  back 
  and 
  

   shoulders 
  grading 
  from 
  dark 
  rusty 
  reddish 
  to 
  ferruginous 
  or 
  burnt 
  

   sienna, 
  with 
  varying 
  admixture 
  of 
  overlying 
  blackish 
  hairs 
  ; 
  underparts 
  

   similar 
  in 
  color 
  to 
  back 
  but 
  with 
  less 
  noticeable 
  admixture 
  of 
  blackish 
  

   hairs 
  ; 
  face, 
  crown 
  cap 
  on 
  head, 
  and 
  median 
  streak 
  on 
  back 
  of 
  neck 
  

   blackish 
  ; 
  sides 
  of 
  neck 
  covered 
  with 
  a 
  mixture 
  of 
  pinkish-bufE, 
  cin- 
  

   namon-buff, 
  and 
  blackish 
  hairs 
  ; 
  outer 
  surfaces 
  of 
  fore 
  and 
  hind 
  limbs 
  

   either 
  black 
  or 
  blackish 
  to 
  knees 
  and 
  elbows 
  ; 
  outer 
  surfaces 
  of 
  limbs 
  

   below 
  knees 
  and 
  elbows 
  either 
  black 
  or 
  with 
  varying 
  admixture 
  of 
  black 
  

   and 
  ferruginous 
  hairs 
  ; 
  a 
  distinct 
  ferruginous 
  or 
  cinnamon-buff 
  streak 
  

   along 
  inner 
  surface 
  of 
  arm 
  from 
  armpit 
  to 
  elbow. 
  (Western 
  side 
  of 
  

  

  