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  STANLEY 
  HIRST. 
  — 
  PRELIMINARY 
  LIST 
  OP 
  THE 
  ACARI 
  OCCURRING 
  ON 
  BROWN 
  RAT. 
  

  

  these 
  animals 
  very 
  seriously. 
  A 
  good 
  account 
  of 
  the 
  sarcoptic 
  mange 
  of 
  rats 
  is 
  

   given 
  by 
  Dr. 
  R. 
  Cranston 
  Low 
  in 
  his 
  paper 
  entitled 
  " 
  An 
  Investigation 
  into 
  Scabies 
  

   in 
  Laboratory 
  Animals 
  " 
  (Journ. 
  Path. 
  & 
  Bact. 
  XV, 
  pp. 
  342-344, 
  pis. 
  XXXVIII 
  

   & 
  XXXIX, 
  figs. 
  17-23, 
  1911). 
  

  

  Family 
  Trombidiidae. 
  

  

  (12.) 
  iVIyobia 
  ensifera, 
  Poppe. 
  

  

  Loc. 
  Banks 
  of 
  River 
  Colne, 
  near 
  Watford 
  ; 
  specimens 
  found 
  on 
  Mus 
  norvegicus. 
  

   This 
  species 
  is 
  also 
  very 
  abundant 
  on 
  tame 
  white 
  rats 
  in 
  London. 
  

  

  ES 
  

   - 
  

  

  