﻿578 
  PROCEEDTNC.S 
  OF 
  rilE 
  XATIOXAL 
  MUSEUM. 
  

  

  was 
  discovered 
  by 
  Bourns 
  aud 
  myself 
  in 
  Negros 
  after 
  our 
  work 
  in 
  

   Panay 
  was 
  (M)ncluded. 
  Halcyon 
  moHcleyi 
  and 
  Oriohis 
  nif/rostriatus 
  are 
  

   rare 
  birds, 
  while 
  the 
  renuiiiiinj;- 
  three 
  species 
  are 
  known 
  only 
  from 
  

   Whitehead's 
  si)eciniens, 
  and 
  at 
  least 
  two 
  of 
  them 
  are 
  highland 
  forms. 
  

  

  Taking 
  into 
  consideration 
  that 
  the 
  highlands 
  of 
  Panay 
  have 
  never 
  

   been 
  visited 
  by 
  a 
  collector, 
  and 
  remembering 
  that 
  there 
  are 
  171 
  species 
  

   of 
  birds 
  known 
  from 
  Negros, 
  against 
  but 
  118 
  from 
  Panay, 
  it 
  is 
  small 
  

   wonder 
  that 
  these 
  7 
  comparatively 
  rare 
  species 
  should 
  be 
  recorded 
  

   from 
  ]S^egros, 
  but 
  uot 
  from 
  Panay. 
  1 
  venture 
  to 
  prophesy 
  that 
  almost 
  

   every 
  cue 
  of 
  these 
  apparent 
  differences 
  will 
  disappear 
  as 
  Panay 
  becomes 
  

   better 
  known. 
  

  

  It 
  is 
  interesting 
  to 
  note 
  in 
  this 
  connection 
  that 
  only 
  one 
  of 
  the 
  Panay 
  

   species 
  of 
  this 
  list 
  is 
  not 
  recorded 
  from 
  Negros, 
  and 
  this 
  species 
  is 
  a 
  

   "frogmouth," 
  known 
  only 
  from 
  the 
  single 
  specimen 
  obtained 
  by 
  Bourns 
  

   and 
  myself. 
  Its 
  discovery 
  in 
  Panay 
  was 
  the 
  merest 
  chance, 
  and 
  we 
  

   never 
  saw 
  a 
  second 
  specimen. 
  

  

  The 
  same 
  course 
  of 
  reasoning 
  which 
  has 
  been 
  employed 
  in 
  discussing 
  

   the 
  differences 
  between 
  Negros 
  and 
  Panay 
  may 
  be 
  applied 
  to 
  the 
  appar- 
  

   ent 
  differences 
  between 
  Guimaras 
  on 
  the 
  one 
  hand 
  aud 
  Negros 
  and 
  

   Panay 
  on 
  the 
  other. 
  

  

  In 
  the 
  case 
  of 
  Masbate, 
  however, 
  we 
  have 
  some 
  differences 
  of 
  a 
  posi- 
  

   tive 
  character. 
  Alcyone 
  nlgrirostris 
  and 
  Bicaeum 
  haematosticium 
  are 
  

   here 
  replaced 
  by 
  Alcyone 
  cyanipectm 
  and 
  Bicaeum 
  ruhrivcnier. 
  As 
  

   Masbate 
  is 
  but 
  20 
  miles 
  from 
  the 
  coast 
  of 
  Luzon, 
  and 
  this 
  gap 
  is 
  i)ai 
  - 
  

   tially 
  bridged 
  by 
  the 
  intervening 
  island 
  of 
  Ticao, 
  it 
  is 
  not 
  to 
  be 
  won- 
  

   dered 
  at 
  tiiat 
  some 
  Luzon 
  forms 
  should 
  have 
  straggled 
  in. 
  

  

  Seemingly 
  the 
  most 
  important 
  difference 
  between 
  Masbate 
  and 
  i^egros 
  

   is 
  the 
  occurrence 
  in 
  the 
  two 
  islands 
  of 
  different 
  species 
  of 
  Cittocincla. 
  

   On 
  the 
  whole, 
  however, 
  the 
  relationship 
  between 
  JNIasbate 
  and 
  the 
  

   islands 
  with 
  which 
  I 
  have 
  joined 
  it 
  is 
  vastly 
  stronger 
  than 
  between 
  it 
  

   and 
  Luzon. 
  

  

  From 
  these 
  facts 
  it 
  seems 
  to 
  me 
  evident 
  that 
  Negros, 
  Panay, 
  Gui- 
  

   maras, 
  and 
  Masbate 
  should 
  be 
  grouped 
  together, 
  and 
  probable 
  that 
  they 
  

   have 
  in 
  the 
  past 
  been 
  actually 
  connected. 
  

  

  They 
  are 
  separated 
  from 
  the 
  eastern 
  and 
  southern 
  islands 
  on 
  account 
  

   of 
  the 
  following 
  differences: 
  First, 
  the 
  occurrence 
  of 
  twenty-two 
  pecul- 
  

   iar 
  species 
  of 
  birds, 
  and 
  ten 
  others 
  which 
  range 
  only 
  to 
  the 
  Tablas- 
  

   Komblon-Sibuyan 
  grou}), 
  or 
  to 
  Cebu; 
  second, 
  the 
  absence 
  of 
  such 
  

   genera 
  as 
  Fhlor/ocnas, 
  Jlydrocora.v, 
  Ilarjiactes, 
  SurniculHs, 
  liolbop.sittacus, 
  

   Blicrostictus, 
  Zosterornu, 
  Macronu.s^ 
  Ptilocichla, 
  Poliolophus, 
  Irena^ 
  Peri- 
  

   crocotns, 
  Arachnothera, 
  aud 
  Muscicapula. 
  

  

  Glancing 
  for 
  a 
  moment 
  at 
  the 
  mammals, 
  we 
  note 
  that 
  these 
  islands 
  

   have 
  a 
  spotted 
  deer 
  peculiar 
  to 
  them, 
  and 
  a 
  little 
  tiger 
  cat 
  {Felis 
  hen- 
  

   fjalensis) 
  which 
  has 
  not 
  been 
  recorded 
  from 
  any 
  other 
  island 
  of 
  the 
  

   Philippines 
  ])roper, 
  while 
  they 
  lack 
  the 
  genera 
  Sciurus, 
  Scitiropterus, 
  

   GalcopitJiecuii, 
  and 
  Tarsiua, 
  as 
  well 
  as 
  other 
  characteristic 
  mammals 
  of 
  

  

  