﻿EARLY 
  STAGES 
  OF 
  WEST 
  AFRICAN 
  MOSQUITOS. 
  

  

  67 
  

  

  teeth 
  arranged 
  in 
  a 
  single 
  row 
  or 
  in 
  two 
  short 
  rows; 
  the 
  pecten 
  of 
  about 
  nine 
  (8 
  to 
  10) 
  

   teeth 
  ; 
  and 
  the 
  hairs 
  on 
  the 
  dorsal 
  border 
  of 
  the 
  anal 
  segment 
  a 
  fan-like 
  arrangement 
  

   of 
  about 
  five 
  hairs 
  above 
  and 
  a 
  long 
  hair 
  below 
  on 
  each 
  side. 
  

  

  Fig. 
  6. 
  Pupa 
  of 
  Gulex 
  quasigelidus, 
  Theo, 
  

  

  Pupa 
  (fig. 
  6). 
  — 
  The 
  pupa 
  of 
  C. 
  quasigelidus 
  has 
  been 
  described 
  very 
  briefly 
  by 
  

   Wesche 
  (loc.cit., 
  p. 
  39), 
  with 
  figures 
  of 
  the 
  respiratory 
  trumpet 
  and 
  of 
  the 
  terminal 
  

   segments 
  of 
  the 
  abdomen. 
  So 
  long 
  as 
  this 
  Culex 
  pupa 
  was 
  unique 
  in 
  having 
  a 
  

   ' 
  distinct 
  dark 
  cloud 
  " 
  on 
  the 
  paddle 
  Wesche's 
  description 
  sufficed 
  for 
  identification, 
  

   but 
  as 
  the 
  pupa 
  of 
  0. 
  ager 
  var. 
  ethiopicus 
  (see 
  p. 
  66) 
  has 
  also 
  an 
  area 
  of 
  infuscation 
  

   on 
  the 
  paddle 
  it 
  is 
  now 
  necessary 
  to 
  amplify 
  the 
  earlier 
  description. 
  The 
  pupa 
  is 
  

   of 
  medium 
  size, 
  measuring 
  about 
  5 
  mm. 
  when 
  extended, 
  and 
  is 
  well 
  chitinised. 
  

  

  The 
  paddles, 
  which 
  are 
  about 
  *8 
  mm. 
  long, 
  are 
  broad, 
  the 
  ratio 
  of 
  length 
  to 
  greatest 
  

   breadth 
  being 
  about 
  1 
  1 
  to 
  1 
  ; 
  they 
  are 
  supported 
  by 
  a 
  well 
  developed 
  midrib 
  and 
  an 
  

   external 
  buttress. 
  Near 
  the 
  end 
  of 
  the 
  midrib 
  are 
  two 
  small 
  hairs, 
  the 
  one 
  larger 
  than 
  

   the 
  other 
  ; 
  the 
  larger 
  hair, 
  which 
  measures 
  only 
  about 
  one-twelfth 
  the 
  length 
  of 
  the 
  

   paddle, 
  is 
  sometimes 
  divided 
  towards 
  its 
  tip. 
  There 
  is 
  a 
  patch 
  of 
  infuscation 
  at 
  the 
  

   distal 
  end 
  of 
  the 
  paddle 
  which 
  involves 
  both 
  the 
  inner 
  and 
  outer 
  lobes 
  but 
  does 
  not 
  

   extend 
  far 
  down 
  towards 
  the 
  insertion 
  of 
  the 
  paddle. 
  There 
  is 
  no 
  fringe 
  on 
  the 
  

   paddles. 
  

  

  At 
  the 
  posterior 
  angle 
  of 
  the 
  8th 
  abdominal 
  segment 
  is 
  a 
  tuft 
  of 
  8 
  or 
  9 
  subplumose 
  

   hairs, 
  which 
  are 
  also 
  branched. 
  This 
  tuft 
  is 
  about 
  one-quarter 
  the 
  length 
  of 
  the 
  

   paddle. 
  

  

  Near 
  the 
  posterior 
  angle 
  of 
  the 
  7th 
  segment 
  is 
  a 
  tuft 
  of 
  4 
  or 
  5 
  subplumose 
  hairs, 
  

   which 
  are 
  also 
  branched. 
  This 
  tuft 
  is 
  almost 
  as 
  long 
  as 
  the 
  one 
  on 
  the 
  8th 
  segment, 
  

   measuring 
  about 
  one-quarter 
  the 
  length 
  of 
  the 
  paddle. 
  Near 
  the 
  posterior 
  angles 
  

   of 
  each 
  of 
  the 
  anterior 
  segments, 
  the 
  6th, 
  5th, 
  4th, 
  and 
  3rd, 
  is 
  a 
  delicate 
  tuft 
  of 
  3 
  

   or 
  4 
  hairs. 
  

   (C572) 
  e2 
  

  

  