﻿NO. 
  1134. 
  rniLIPPIXE 
  OEXITHOLOGT—WOECESTEE 
  AND 
  BOUEXS. 
  591 
  

  

  the 
  following- 
  species 
  common 
  to 
  Luzon 
  and 
  Mindoro, 
  but 
  not 
  known 
  to 
  

   range 
  to 
  the 
  south 
  : 
  

  

  1. 
  Carpophaga 
  carola. 
  7. 
  Dicaeum 
  retrocincfinn. 
  

  

  2. 
  Forphi/rio 
  i)iilreru1entus. 
  8. 
  Dicaeum 
  xanihopi/gium. 
  

  

  3. 
  fj/ngijiicus 
  I'alidirostris. 
  9. 
  Lanius 
  raHdivofifris. 
  

  

  4. 
  Dicriinis 
  balicassiux. 
  10. 
  Htjlotcrpe 
  aUnrcniris. 
  

  

  5. 
  CMorura 
  bnonieiveniris. 
  11. 
  Lalage 
  domiiiica. 
  

  

  6. 
  Jefhopi/ga 
  ttavipecfu.s. 
  12. 
  J!i(ich!H)teryx 
  jioUogipia. 
  

  

  This 
  gives 
  us 
  the 
  rather 
  imposing 
  total 
  of 
  63 
  Luzon 
  forms 
  not 
  found 
  

   in 
  Samar 
  as 
  yet, 
  and 
  if 
  we 
  add 
  the 
  22 
  Samar 
  species 
  not 
  recorded 
  from 
  

   Luzon 
  the 
  total 
  difference 
  between 
  the 
  two 
  regions 
  is 
  great. 
  I 
  wish, 
  

   however, 
  to 
  call 
  attention 
  to 
  certain 
  common 
  features 
  in 
  the 
  avifannae 
  

   of 
  the 
  two 
  islands. 
  The 
  oul.y 
  families 
  of 
  land 
  birds 
  of 
  which 
  represent- 
  

   atives 
  have 
  been 
  found 
  in 
  Luzon, 
  but 
  not 
  in 
  Samar 
  or 
  Leyte, 
  are 
  the 
  

   Strigidae, 
  Caprimulgidae^ 
  Fringillidae, 
  Alaiididae, 
  and 
  Faridae. 
  It 
  can 
  

   hardly 
  be 
  doubted 
  that, 
  with 
  the 
  possible 
  exception 
  of 
  the 
  FringilUdae, 
  

   representatives 
  of 
  all 
  these 
  families 
  will 
  eventually 
  be 
  found 
  in 
  Samar 
  

   and 
  Leyte, 
  and 
  in 
  tlu^ 
  case 
  of 
  the 
  FringiUidae 
  we 
  must 
  remember 
  that 
  

   the 
  highlands 
  of 
  these 
  islands 
  are 
  yet 
  to 
  be 
  heard 
  from. 
  

  

  Apart 
  from 
  the 
  practical 
  agreement 
  of 
  the 
  fomilies 
  represented, 
  sev- 
  

   eral 
  of 
  which 
  are 
  confined 
  in 
  the 
  Philippines 
  to 
  the 
  eastern 
  and 
  southern 
  

   islands, 
  we 
  find 
  the 
  following 
  genera 
  ranging 
  from 
  Mindanao 
  to 
  Luzon, 
  

   in 
  some 
  cases 
  even 
  from 
  Tawi 
  Tawi 
  to 
  Luzon, 
  but 
  not 
  recorded 
  from 
  

   the 
  central 
  Philippines 
  : 
  

  

  1. 
  Pldogoenas. 
  10. 
  MicrosiicUis. 
  

  

  2. 
  Microhierax. 
  11. 
  Eudrepanis. 
  

  

  3. 
  nthecopliaga 
  (probably). 
  12. 
  Zosterornis. 
  

  

  4. 
  Bubo. 
  13. 
  Poliolophus. 
  

  

  5. 
  Scops. 
  14. 
  Irena. 
  

  

  6. 
  Ri/drocorax. 
  15. 
  Muscicapula. 
  

  

  7. 
  Lijncornis. 
  16. 
  Fcncrocofus. 
  

  

  8. 
  Earpactes. 
  17. 
  Surniculiis. 
  

  

  9. 
  BoJbopsittacus. 
  

  

  It 
  would 
  seem, 
  then, 
  that 
  there 
  is 
  a 
  general 
  relationship 
  between 
  

   the 
  chain 
  of 
  islands 
  forming 
  the 
  eastern 
  and 
  southern 
  Philippines, 
  and 
  

   as 
  a 
  further 
  evidence 
  of 
  the 
  closeness 
  of 
  this 
  relationship 
  it 
  will 
  be 
  

   found 
  that 
  at 
  each 
  of 
  the 
  natural 
  barriers 
  in 
  this 
  chain 
  there 
  is 
  more 
  

   or 
  less 
  overlapping 
  of 
  species. 
  Harpaetes 
  ardens, 
  Surnic7ihi.9 
  relntinus, 
  

   Prioniturys 
  discuniSy 
  Anthothreptes 
  griseigularis, 
  Dicaeum 
  riihriventer, 
  

   Dicaeum 
  luzoniense, 
  Hyloterpe 
  philippinensis, 
  Lalage 
  minor., 
  and 
  Polio- 
  

   lophus 
  urostictus 
  are 
  species 
  which 
  illustrate 
  the 
  partial 
  overlapping" 
  of 
  

   the 
  avifannae 
  of 
  Samar 
  and 
  Luzon. 
  

  

  Such 
  a 
  large 
  number 
  of 
  genera 
  are 
  known 
  to 
  have 
  different 
  rep- 
  

   resentative 
  species 
  in 
  Samar 
  and 
  Luzon 
  as 
  to 
  warrant 
  the 
  supposi- 
  

   tion 
  that 
  a 
  considerable 
  amount 
  of 
  ditterence 
  will 
  remain 
  in 
  the 
  avi- 
  

   fannae 
  of 
  the 
  two 
  islands 
  when 
  our 
  knowledge 
  of 
  Samar 
  and 
  Leyte 
  

   becomes 
  as 
  complete 
  as 
  is 
  our 
  knowledge 
  of 
  Luzon 
  at 
  present, 
  

   but 
  when 
  we 
  remember 
  that 
  the 
  apparent 
  differences 
  are 
  due 
  in 
  

  

  