﻿FOUND 
  ON 
  RATS 
  IN 
  EGYPT. 
  

  

  225 
  

  

  coxae 
  and 
  furnished 
  with 
  three 
  pairs 
  of 
  hairs. 
  A 
  minute 
  platelet 
  is 
  situated 
  

   behind 
  each 
  of 
  the 
  coxae 
  of 
  the 
  last 
  pair 
  of 
  legs. 
  Peritreme 
  very 
  short. 
  Length 
  

   of 
  body, 
  *61— 
  "7 
  mm. 
  

  

  Egypt 
  : 
  Assiut 
  ; 
  specimens 
  found 
  on 
  the 
  following 
  hosts 
  : 
  — 
  (1) 
  Over 
  three 
  

   hundred 
  specimens 
  taken 
  on 
  Acomys 
  cahirinus 
  in 
  the 
  town 
  and 
  a 
  few 
  on 
  the 
  feluccas 
  ; 
  

  

  (2) 
  a 
  large 
  number 
  of 
  specimens 
  on 
  Mus 
  rattus 
  in 
  the 
  town 
  and 
  a 
  few 
  on 
  the 
  feluccas 
  ; 
  

  

  (3) 
  three 
  specimens 
  from 
  Mus 
  norvegicus 
  (on 
  feluccas) 
  ; 
  (4) 
  Arvicanthis 
  niloticus 
  

   (in 
  houses), 
  eight 
  specimens. 
  El 
  Weladie 
  ; 
  thirteen 
  specimens 
  (name 
  of 
  host 
  not 
  

   given). 
  Kous 
  ; 
  a 
  few 
  specimens 
  found 
  on 
  Acomys 
  cahirinus. 
  

  

  Fig. 
  11. 
  Dorsal 
  view 
  of 
  protonymph 
  of 
  

   Dermanyssus 
  aegyptius, 
  Hirst. 
  

  

  4. 
  Leiognathus 
  bacoti, 
  Hirst 
  (figs. 
  12-14). 
  

  

  Leiognathus 
  bacoti, 
  Hirst, 
  Bull. 
  Ent. 
  Res. 
  iv, 
  p. 
  122 
  (1913). 
  

  

  $. 
  The 
  original 
  description 
  of 
  the 
  female 
  of 
  this 
  species 
  is 
  fairly 
  complete 
  and 
  

   therefore 
  only 
  a 
  few 
  additional 
  details 
  are 
  given 
  here 
  : 
  — 
  Two 
  elongated 
  platelets 
  are 
  

   placed 
  symmetrically 
  on 
  each 
  side 
  of 
  the 
  genito- 
  ventral 
  plate. 
  Anterior 
  surface 
  of 
  

   coxa 
  of 
  first 
  leg 
  with 
  the 
  upper 
  angle 
  projecting 
  and 
  dentiform. 
  Anterior 
  surface 
  

   of 
  coxa 
  of 
  second 
  leg 
  armed 
  distally 
  with 
  a 
  distinct 
  spine, 
  but, 
  owing 
  to 
  its 
  position, 
  

   this 
  spine 
  is 
  not 
  always 
  easy 
  to 
  see. 
  Peritreme 
  reaching 
  far 
  forwards 
  ; 
  its 
  supporting 
  

   plate 
  ends 
  anteriorly 
  in 
  a 
  lancet-shaped 
  expansion 
  situated 
  on 
  the 
  dorso-lateral 
  

   surface 
  of 
  the 
  body 
  above 
  the 
  interval 
  between 
  the 
  first 
  and 
  second 
  coxae. 
  (The 
  

  

  