﻿FOUND 
  ON 
  RATS 
  IN 
  EGYPT. 
  

  

  219 
  

  

  The 
  female, 
  male 
  and 
  proton 
  ymph 
  are 
  described 
  from 
  both 
  Oriental 
  and 
  Egyptian 
  

   specimens, 
  but 
  the 
  account 
  of 
  the 
  deutonymph 
  is 
  based 
  entirely 
  on 
  Egyptian 
  material. 
  

  

  Egypt 
  : 
  Assiut, 
  specimens 
  were 
  on 
  the 
  following 
  hosts 
  : 
  — 
  (1) 
  Several 
  hundred 
  

   specimens 
  from 
  Mus 
  rattus, 
  both 
  in 
  the 
  town 
  and 
  on 
  the 
  feluccas 
  ; 
  (2) 
  one 
  

   specimen 
  found 
  on 
  Mus 
  norvegicus 
  ; 
  (3) 
  a 
  few 
  specimens 
  from 
  Arvicanihis 
  niloticus 
  

   (in 
  houses). 
  Kous 
  ; 
  a 
  few 
  specimens 
  found 
  on 
  Mus 
  rattus 
  and 
  one 
  on 
  Acomys. 
  

   El 
  Hasaiba, 
  Deimt 
  ; 
  seven 
  specimens 
  found 
  on 
  Mus 
  rattus. 
  

  

  Arabia 
  : 
  Sheik 
  Othman 
  ; 
  one 
  specimen 
  on 
  a 
  rat 
  (species 
  not 
  determined) 
  

   collected 
  by 
  Dr. 
  Macrae 
  and 
  now 
  in 
  the 
  collection 
  of 
  Mr. 
  James 
  Waterston. 
  

  

  India 
  : 
  Madras, 
  on 
  Mus 
  rattus. 
  

  

  Ceylon 
  : 
  Colombo, 
  on 
  Mus 
  rattus. 
  

  

  2. 
  Dermanyssus 
  sanguineus, 
  sp. 
  nov. 
  (figs. 
  5-8). 
  

  

  2. 
  Dorsal 
  surface 
  with 
  two 
  distinct 
  shields, 
  the 
  posterior 
  one 
  being 
  of 
  small 
  size. 
  

   Anterior 
  dorsal 
  shield 
  of 
  moderate 
  length 
  and 
  rather 
  wide 
  at 
  the 
  anterior 
  end 
  but 
  

  

  Fig. 
  5. 
  Dermanyssus 
  sanguineus, 
  $ 
  ; 
  ventral 
  and 
  dorsal 
  aspects. 
  

  

  narrower 
  posteriorly, 
  ending 
  abruptly, 
  the 
  posterior 
  extremity 
  being 
  fairly 
  wide 
  and 
  

   somewhat 
  rounded 
  ; 
  hairs 
  on 
  this 
  shield 
  fairly 
  long. 
  Posterior 
  dorsal 
  shield 
  almost 
  

   ovate 
  in 
  shape 
  and 
  always 
  furnished 
  with 
  a 
  pair 
  of 
  fairly 
  long 
  hairs. 
  Sternal 
  plate 
  

  

  