﻿THE 
  EARLY 
  STAGES 
  OF 
  WEST 
  AFRICAN 
  MOSQUITOS. 
  

  

  439 
  

  

  Thorax 
  broad; 
  length 
  about 
  0-8 
  mm., 
  greatest 
  breadth 
  about 
  1mm. 
  The 
  

   setae 
  on 
  the 
  anterior 
  border 
  are 
  long, 
  longer 
  than 
  the 
  head. 
  The 
  lateral 
  tufts 
  are 
  

   well 
  developed. 
  

  

  Abdomen 
  with 
  long 
  lateral 
  tufts 
  on 
  the 
  first 
  two 
  segments, 
  and 
  thereafter 
  shorter, 
  

   double, 
  dorso-lateral 
  hairs. 
  Comb 
  (fig. 
  23) 
  composed 
  of 
  about 
  thirty-six 
  small, 
  

   dark, 
  fringed 
  spines 
  arranged 
  in 
  a 
  triangular 
  patch. 
  The 
  siphonal 
  tuft 
  small, 
  com- 
  

   posed 
  of 
  about 
  four 
  rather 
  stout 
  subplumose 
  hairs 
  ; 
  the 
  subsiphonal 
  longer, 
  composed 
  

   of 
  about 
  eight 
  subplumose 
  hairs 
  ; 
  the 
  anal 
  small, 
  double, 
  pubescent. 
  The 
  siphon 
  

   (fig. 
  23) 
  is 
  very 
  dark 
  brown, 
  long, 
  length 
  about 
  eight 
  times 
  the 
  basal 
  diameter, 
  

   tapering 
  only 
  slightly, 
  and 
  bearing 
  on 
  its 
  distal 
  two-thirds 
  three 
  or 
  four 
  pairs 
  of 
  tufts 
  

   composed 
  of 
  three 
  or 
  four 
  rather 
  long 
  pubescent 
  hairs. 
  Pecten 
  composed 
  of 
  about 
  

  

  Fig. 
  23. 
  

  

  Larva 
  of 
  Culex 
  macfiei, 
  Edw., 
  head 
  and 
  terminal 
  segments 
  of 
  abdomen 
  

  

  a, 
  mental 
  plate. 
  

  

  (8455) 
  

  

  2H2 
  

  

  