﻿PROCEEDINGS 
  OF 
  THE 
  UNITED 
  STATES 
  NATIONAL 
  MUSEUM 
  

  

  SMITHSONIAN 
  INSTITUTION 
  

   U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  Vol. 
  103 
  Washington: 
  1953 
  No. 
  3312 
  

  

  TWO 
  NEW 
  SCALE-MITE 
  PARASITES 
  OF 
  LIZARDS 
  

  

  By 
  R. 
  F. 
  Lawrence 
  ' 
  

  

  Dr. 
  G. 
  W. 
  Wharton, 
  of 
  Duke 
  University, 
  Durham, 
  N. 
  C, 
  has 
  kindly 
  

   submitted 
  to 
  me 
  for 
  identification 
  a 
  number 
  of 
  scale 
  mites 
  from 
  lizards 
  

   of 
  the 
  families 
  Gekkonidae 
  and 
  Iguanidae. 
  The 
  material, 
  from 
  the 
  

   Philippine 
  Islands, 
  consists 
  of 
  one 
  series 
  taken 
  from 
  a 
  lizard 
  at 
  Fort 
  

   McKinley, 
  Rizal, 
  and 
  another 
  from 
  the 
  gecko 
  Hemidactylus 
  freTiatus 
  

   in 
  a 
  house 
  at 
  Manila. 
  Both 
  series 
  consist 
  of 
  two 
  quite 
  different 
  species 
  

   of 
  Geckobia. 
  These 
  are 
  described 
  in 
  this 
  paper 
  as 
  new 
  and 
  both 
  of 
  

   them 
  have 
  been 
  taken 
  at 
  the 
  two 
  localities 
  mentioned 
  above. 
  There 
  

   is 
  thus 
  good 
  reason 
  for 
  assuming 
  that 
  the 
  hosts 
  of 
  the 
  two 
  series 
  are 
  

   the 
  same 
  and 
  that 
  the 
  "lizard" 
  of 
  Fort 
  McKinley 
  is 
  identical 
  with 
  

   the 
  gecko 
  H. 
  frenatus 
  from 
  which 
  scale 
  mites 
  were 
  taken 
  at 
  Manila. 
  

   All 
  these 
  parasites 
  were 
  collected 
  by 
  Dr. 
  H. 
  L. 
  Keegan, 
  Third 
  General 
  

   Medical 
  Laboratory, 
  at 
  Fort 
  McKinley, 
  Rizal, 
  Philippine 
  Islands. 
  

  

  A 
  further 
  series, 
  consisting 
  of 
  a 
  large 
  number 
  of 
  adults 
  and 
  larvae, 
  

   were 
  collected 
  from 
  the 
  iguanid 
  lizard 
  Sceloporus 
  undulatus^ 
  at 
  Dur- 
  

   ham, 
  N. 
  C, 
  by 
  Dr. 
  A. 
  S. 
  Pearse; 
  these 
  have 
  been 
  identified 
  as 
  Banks' 
  

   New 
  World 
  pterygosomid 
  Geckohiella 
  texana. 
  

  

  Several 
  species 
  of 
  the 
  scale 
  mite 
  parasite 
  Geckobia 
  may 
  live 
  on 
  the 
  

   same 
  host; 
  Hirst 
  (1925, 
  p. 
  173) 
  has 
  already 
  pointed 
  this 
  out, 
  saying, 
  

   "When 
  more 
  than 
  one 
  form 
  of 
  Geckobia 
  is 
  found 
  on 
  the 
  same 
  host, 
  

   one 
  lives 
  beneath 
  the 
  ventral 
  scales 
  and 
  is 
  flattened, 
  being 
  considerably 
  

   wider 
  than 
  long 
  and 
  having 
  scales 
  instead 
  of 
  hairs 
  on 
  the 
  venter. 
  

   The 
  second 
  form 
  occurring 
  on 
  the 
  same 
  host 
  is 
  usually 
  to 
  be 
  discovered 
  

   between 
  the 
  claw 
  and 
  pad 
  of 
  the 
  toes, 
  between 
  the 
  laminae 
  of 
  the 
  pad, 
  

   or 
  between 
  the 
  toes 
  themselves; 
  this 
  form 
  is 
  practically 
  spherical 
  in 
  

   shape 
  and 
  has 
  hairs 
  instead 
  of 
  scales 
  on 
  the 
  venter." 
  Although 
  there 
  

  

  * 
  Natal 
  Museum, 
  Pietermaritzburg, 
  Union 
  of 
  South 
  Africa. 
  

  

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