﻿THE 
  EARLY 
  STAGES 
  OF 
  WEST 
  AFRICAN 
  MOSQUITOS. 
  

  

  425 
  

  

  fringe, 
  which 
  is 
  composed 
  of 
  large 
  tooth-like 
  processes, 
  extends 
  completely 
  round 
  

   the 
  paddles 
  with 
  the 
  exception 
  of 
  the 
  extreme 
  base. 
  The 
  ninth 
  segment 
  is 
  unusually 
  

   large 
  and 
  in 
  the 
  female 
  is 
  furnished 
  with 
  two 
  lateral 
  processes 
  covered 
  by 
  coarse 
  

   spicules 
  (fig. 
  13, 
  c, 
  d). 
  The 
  dorsal 
  abdominal 
  setae 
  are 
  well 
  developed, 
  the 
  

   more 
  important 
  ones 
  being 
  conspicuous 
  black 
  tufts. 
  The 
  lateral 
  setae 
  (A) 
  on 
  

   segment 
  viii 
  are 
  large 
  tufts, 
  reaching 
  nearly 
  to 
  the 
  middle 
  of 
  the 
  paddles, 
  composed 
  

   of 
  eight 
  or 
  nine 
  pubescent 
  hairs, 
  on 
  segment 
  vii 
  smaller 
  tufts 
  of 
  two 
  or 
  three 
  similar 
  

   hairs, 
  and 
  on 
  segments 
  ii 
  to 
  vi 
  very 
  long, 
  delicate, 
  single 
  hairs. 
  The 
  sublateral 
  setae 
  

   (B) 
  on 
  segment 
  vii 
  are 
  tufts, 
  reaching 
  beyond 
  the 
  posterior 
  margin 
  of 
  the 
  eighth 
  

   segment, 
  of 
  four 
  pubescent 
  hairs 
  ; 
  on 
  segments 
  iv 
  to 
  vi 
  similar 
  but 
  longer 
  tufts 
  of 
  

   three 
  hairs. 
  The 
  submedian 
  setae 
  (C) 
  on 
  segment 
  vii 
  are 
  very 
  long 
  tufts, 
  reaching 
  

   backwards 
  beyong 
  the 
  middle 
  of 
  the 
  paddles, 
  composed 
  of 
  three 
  pubescent 
  hairs 
  ; 
  

   on 
  segments 
  iii 
  to 
  vi 
  similar 
  but 
  shorter 
  tufts 
  of 
  three 
  hairs. 
  The 
  dendritic 
  tufts 
  

   on 
  segment 
  i 
  are 
  obsolete, 
  being 
  represented 
  by 
  small, 
  stout, 
  single 
  setae. 
  

  

  Habitat. 
  — 
  Accra, 
  v. 
  1922 
  ; 
  collected 
  from 
  a 
  pool 
  covered 
  by 
  water 
  lettuce 
  (Pistia 
  

   stratiotes), 
  near 
  the 
  station 
  for 
  the 
  Weshiang 
  railway 
  line. 
  

  

  G 
  ^ii:': 
  1 
  . 
  1 
  ,'/" 
  

  

  Fig. 
  13. 
  Pupa 
  of 
  Ficalbia 
  mediolineata, 
  Theo. 
  : 
  a, 
  trumpet 
  ; 
  b, 
  dorsal 
  view 
  of 
  abdomen 
  ; 
  

   o, 
  ninth 
  abdominal 
  segment 
  of 
  £ 
  ; 
  d, 
  same 
  of 
  $. 
  

  

  Aedes 
  (Aedimorphus) 
  furcifer, 
  Edw. 
  

  

  Larva. 
  — 
  The 
  larva 
  has 
  not 
  yet 
  been 
  identified. 
  

  

  Pupa. 
  — 
  Onlv 
  a 
  single 
  pupal 
  pelt 
  was 
  obtained, 
  and 
  as 
  some 
  setae 
  were 
  missing 
  

   from 
  it 
  a 
  complete 
  description 
  cannot 
  be 
  given. 
  The 
  pupa 
  is 
  well 
  chitinised 
  and 
  

   not 
  very 
  large 
  ; 
  length 
  when 
  extended 
  about 
  5 
  mm. 
  

  

  