﻿586 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  lucidus 
  (2) 
  . 
  Skeletal 
  material 
  was 
  available 
  as 
  follows 
  : 
  Chrysococcyx 
  

   cupreus 
  (3), 
  Lampromorpha 
  caprius 
  (2), 
  and 
  L. 
  hlaas 
  (1). 
  Certain 
  

   information 
  was 
  also 
  obtained 
  from 
  the 
  skeletons 
  of 
  the 
  alcoholic 
  

   specimens. 
  For 
  reading 
  the 
  manuscript 
  and 
  for 
  offering 
  suggestions 
  

   I 
  am 
  indebted 
  to 
  Dr. 
  Amadon, 
  Dr. 
  Jean 
  Delacour, 
  Los 
  Angeles 
  

   County 
  Museum, 
  California, 
  Dr. 
  Friedmann, 
  and 
  Dr. 
  Josselyn 
  Van 
  

   Tyne, 
  University 
  of 
  Michigan 
  Museum 
  of 
  Zoology. 
  

  

  Pterylosis 
  

  

  Beddard 
  (1885, 
  p. 
  187), 
  basing 
  his 
  comments 
  on 
  manuscript 
  notes 
  

   of 
  Garrod 
  and 
  Forbes, 
  grouped 
  Chrysococcyx 
  with 
  those 
  cuckoos 
  

   which 
  have 
  the 
  "ventral 
  tract 
  [abdominal] 
  of 
  both 
  sides 
  single," 
  but 
  

   this 
  arrangement 
  is, 
  in 
  fact, 
  not 
  found 
  in 
  Chrysococcyx. 
  Miller 
  ( 
  1924, 
  

   p. 
  330) 
  reported 
  that 
  the 
  nestling 
  of 
  Chrysococcyx 
  lacks 
  natal 
  down. 
  

   Nothing 
  else 
  seems 
  to 
  have 
  been 
  published 
  on 
  the 
  pterylosis 
  of 
  the 
  

   species 
  discussed 
  in 
  this 
  paper. 
  

  

  In 
  general 
  the 
  pterylosis 
  of 
  the 
  four 
  species 
  is 
  similar. 
  In 
  each 
  

   species 
  there 
  are 
  10 
  primaries 
  and 
  10 
  secondaries, 
  though 
  secondaries 
  

   8, 
  9, 
  and 
  10 
  (outermost 
  counted 
  as 
  first) 
  are 
  progressively 
  smaller. 
  

   The 
  fifth 
  secondary 
  is 
  present, 
  i. 
  e., 
  the 
  wing 
  is 
  eutaxic, 
  or 
  quintocu- 
  

   bital. 
  There 
  are 
  four 
  alula 
  quills, 
  the 
  outermost 
  being 
  the 
  longest. 
  

   The 
  carpal 
  remex 
  and 
  its 
  covert 
  are 
  present. 
  There 
  are 
  10 
  rectrices 
  

   and 
  10 
  upper 
  tail 
  coverts. 
  The 
  oil 
  gland 
  is 
  nude; 
  a 
  single, 
  median 
  

   feather 
  at 
  the 
  base 
  of 
  the 
  gland 
  passes 
  caudad, 
  covering 
  it. 
  The 
  eye- 
  

   lashes 
  are 
  featherlike 
  rather 
  than 
  hairlike 
  as 
  in 
  Coua 
  caerulea. 
  The 
  

   tarsi 
  are 
  what 
  Sharpe 
  (1873, 
  p. 
  579) 
  spoke 
  of 
  as 
  "accipitrine," 
  i. 
  e., 
  

   feather 
  tracts 
  descend 
  for 
  a 
  distance 
  of 
  about 
  6 
  mm. 
  on 
  the 
  tarsometa- 
  

   tarsus 
  ; 
  the 
  lateral 
  tract 
  shows 
  the 
  best 
  development. 
  

  

  In 
  the 
  capital 
  region, 
  the 
  median 
  frontal 
  apterium 
  is 
  wanting. 
  A 
  

   small 
  supraorbital 
  apterium 
  is 
  present, 
  but 
  it 
  is 
  separated 
  from 
  the 
  

   eyelashes 
  by 
  a 
  single 
  row 
  of 
  feathers. 
  The 
  dorsal 
  cervical 
  feather 
  

   tract 
  is 
  continuous 
  with 
  the 
  interscapular 
  tract. 
  A 
  wide 
  lateral 
  

   cervical 
  apterium 
  is 
  present. 
  A 
  long, 
  narrow, 
  median 
  dorsal 
  apterium 
  

   extends 
  through 
  the 
  dorsal 
  region 
  and 
  the 
  anterior 
  half 
  of 
  the 
  pelvic 
  

   region. 
  There 
  is 
  a 
  single, 
  medium 
  pelvic 
  feather 
  tract. 
  

  

  Bilateral 
  submalar 
  apteria 
  are 
  present 
  ; 
  these 
  are 
  widest 
  in 
  Chryso- 
  

   coccyx 
  and 
  narrowest 
  in 
  Lampromorpha 
  caprius. 
  

  

  The 
  abdominal 
  branches 
  of 
  the 
  above-mentioned 
  genera 
  differ 
  from 
  

   those 
  shown 
  for 
  Cacomantis^ 
  Piaya 
  (Beddard, 
  1885), 
  and 
  Cuculus 
  

   canorus 
  (Lowe, 
  1943, 
  p. 
  493) 
  in 
  that 
  two 
  separate 
  tracts 
  form 
  at 
  the 
  

   posterior 
  margin 
  of 
  the 
  sternum. 
  An 
  inner 
  abdominal 
  tract 
  extends 
  

   to 
  the 
  anus 
  ; 
  this 
  tract 
  is 
  two 
  feathers 
  wide 
  at 
  the 
  beginning, 
  but 
  is 
  re- 
  

   duced 
  to 
  one 
  row 
  about 
  two-thirds 
  the 
  distance 
  to 
  the 
  anus. 
  The 
  outer 
  

   abdominal 
  tract 
  turns 
  inward 
  to 
  meet 
  the 
  inner 
  abdominal 
  tract 
  about 
  

   midway 
  to 
  the 
  anus. 
  

  

  