﻿EARLY 
  STAGES 
  OE 
  WEST 
  AFRICAN 
  MOSQUITOS. 
  

  

  61 
  

  

  having 
  a 
  curved, 
  but 
  not 
  hook-shaped 
  hair 
  at 
  the 
  end 
  of 
  the 
  paddle, 
  and 
  by 
  the 
  

   hairs 
  in 
  the 
  inner 
  lateral 
  row 
  on 
  the 
  7th, 
  6th 
  and 
  5th 
  segments, 
  which 
  are 
  often 
  sub- 
  

   divided 
  ; 
  and 
  A. 
  pharoensis 
  by 
  the 
  large 
  hair 
  on 
  the 
  end 
  of 
  the 
  paddle 
  not 
  being 
  

   hook-shaped. 
  

  

  Habitat. 
  — 
  The 
  larvae 
  of 
  this 
  mosquito 
  were 
  captured 
  in 
  shallow 
  pools 
  in 
  outcrops 
  

   of 
  quartzite 
  at 
  Winduri, 
  Tong 
  Hills, 
  in 
  the 
  Northern 
  Territories 
  of 
  the 
  Gold 
  Coast, 
  

   18.vi.19l8. 
  They 
  were 
  associated 
  with 
  larvae 
  of 
  Stegomyia 
  vittata, 
  Bigot 
  (sugens, 
  

   Theo., 
  nee 
  Wied.). 
  

  

  Anopheles 
  rufipes, 
  Gough. 
  

  

  Larva. 
  — 
  The 
  larva 
  of 
  this 
  mosquito 
  is 
  included 
  by 
  Edwards 
  (loc. 
  cit., 
  p. 
  374) 
  

   in 
  his 
  key 
  to 
  the 
  larvae 
  of 
  African 
  species 
  of 
  the 
  genus 
  Anopheles. 
  

  

  Pupa 
  (fig. 
  2). 
  — 
  The 
  pupa 
  is 
  small, 
  measuring 
  about 
  3*5 
  to 
  4 
  mm. 
  when 
  extended, 
  

   and 
  very 
  strongly 
  chitinised. 
  

  

  Fig. 
  2. 
  Pupa 
  of 
  Anopheles 
  rufipes, 
  Grongh. 
  

  

  The 
  paddles, 
  which 
  are 
  about 
  '6 
  mm. 
  long, 
  are 
  oval, 
  the 
  ratio 
  of 
  length 
  to 
  greatest 
  

   breadth 
  being 
  about 
  1*5 
  to 
  1 
  ; 
  they 
  are 
  supported 
  by 
  a 
  well-developed 
  midrib 
  and 
  

   an 
  external 
  buttress, 
  which 
  is 
  not 
  so 
  well 
  developed 
  as 
  that 
  of 
  A. 
  costalis. 
  The 
  

   hair 
  on 
  the 
  distal 
  edge 
  of 
  the 
  paddle, 
  which 
  in 
  some 
  other 
  species 
  resembles 
  a 
  boot- 
  

   hook, 
  is 
  unfortunately 
  missing 
  from 
  the 
  two 
  pupae 
  examined. 
  On 
  each 
  paddle, 
  

   near 
  the 
  end 
  of 
  the 
  midrib, 
  there 
  is 
  a 
  short 
  hair 
  divided 
  towards 
  its 
  tip. 
  This 
  

   splitting 
  towards 
  their 
  tips 
  of 
  the 
  small 
  hairs 
  of 
  the 
  paddles 
  is 
  not 
  a 
  character 
  of 
  

   specific 
  importance, 
  as 
  it 
  occurs 
  occasionally 
  in 
  A. 
  costalis. 
  The 
  paddle 
  bears 
  a 
  

   fringe 
  which 
  begins 
  at 
  a 
  point 
  a 
  little 
  proximal 
  to 
  the 
  middle 
  of 
  the 
  external 
  border. 
  

  

  At 
  the 
  posterior 
  angle 
  of 
  the 
  8th 
  abdominal 
  segment 
  is 
  a 
  stout 
  seta 
  giving 
  off 
  

   branches, 
  which 
  resembles 
  the 
  corresponding 
  seta 
  of 
  the 
  pupa 
  of 
  A. 
  funestus 
  ; 
  it 
  

   measures 
  about 
  one-quarter 
  the 
  length 
  of 
  the 
  paddle. 
  

  

  At 
  the 
  posterior 
  angle 
  of 
  the 
  7th 
  segment 
  is 
  a 
  curved 
  and 
  pointed 
  spine 
  ; 
  on 
  the 
  

   6th, 
  5th 
  and 
  4th 
  segments 
  the 
  corresponding 
  spines 
  are 
  straight 
  and 
  shorter. 
  

   These 
  angle 
  spines 
  are 
  smaller 
  the 
  more 
  anterior 
  the 
  segment 
  to 
  which 
  they 
  are 
  

   attached 
  ; 
  those 
  on 
  the 
  3rd 
  and 
  2nd 
  segments 
  being 
  minute. 
  

  

  In 
  addition 
  to 
  the 
  spines 
  already 
  described 
  there 
  are 
  numerous 
  hairs 
  on 
  the 
  

   body 
  of 
  the 
  pupa, 
  especially 
  along 
  the 
  posterior 
  margins 
  of 
  the 
  segments 
  ; 
  the 
  

  

  