﻿440 
  

  

  J. 
  W. 
  S. 
  MACFIE 
  AND 
  A. 
  INGRAM. 
  

  

  fourteen 
  to 
  sixteen 
  pointed, 
  barbed 
  spines, 
  arranged 
  in 
  a 
  row 
  which 
  reaches 
  about 
  

   one-third 
  of 
  the 
  length 
  of 
  the 
  siphon 
  from 
  its 
  base. 
  Anal 
  segment 
  longer 
  than 
  

   broad, 
  the 
  chitinised 
  part 
  very 
  dark 
  brown, 
  covered 
  by 
  short 
  transverse 
  rows 
  of 
  

   spicules, 
  the 
  posterior 
  margin 
  bearing 
  on 
  each 
  side 
  a 
  few 
  small 
  spines 
  and 
  a 
  small 
  

   single 
  hair. 
  Beard 
  well 
  developed. 
  Dorsal 
  setae 
  long 
  ; 
  two 
  above 
  and 
  one 
  below 
  

   on 
  each 
  side. 
  Anal 
  papillae 
  short, 
  pointed, 
  the 
  dorsal 
  pair 
  longer 
  than 
  the 
  ventral. 
  

  

  Diagnosis. 
  — 
  According 
  to 
  Edwards's 
  key 
  (Bull. 
  Ent. 
  Res. 
  iii, 
  p. 
  381) 
  this 
  larva 
  

   has 
  to 
  be 
  distinguished 
  from 
  that 
  of 
  Culex 
  decens, 
  Theo. 
  ; 
  this 
  is 
  readily 
  done 
  by 
  the 
  

   tufts 
  of 
  hairs 
  on 
  the 
  siphon, 
  to 
  mention 
  only 
  a 
  single 
  character. 
  

  

  Pupa. 
  — 
  The 
  pupa 
  is 
  small, 
  length 
  about 
  4 
  mm. 
  when 
  extended, 
  and 
  not 
  very 
  

   highly 
  chitinised. 
  

  

  CephalotJwrax 
  slightly 
  infuscated 
  dorsally. 
  Respiratory 
  trumpets 
  (fig. 
  24, 
  a) 
  

   dark 
  brown, 
  relatively 
  long 
  and 
  narrow, 
  with 
  small 
  apertures 
  ; 
  length 
  about 
  • 
  5 
  mm., 
  

   ratio 
  of 
  length 
  of 
  the 
  meatus 
  to 
  the 
  total 
  length 
  about 
  1 
  to 
  1 
  -2. 
  Setae 
  well 
  developed, 
  

   especially 
  the 
  post-ocular 
  setae 
  ; 
  the 
  lower 
  anterior 
  seta 
  of 
  the 
  antero-thoracic 
  group 
  

   not 
  very 
  large, 
  dorsal 
  setae 
  double 
  or 
  triple. 
  

  

  Abdomen 
  (fig. 
  24, 
  b). 
  Paddles 
  delicate, 
  more 
  or 
  less 
  oval 
  ; 
  length 
  about 
  0-65 
  mm., 
  

   greatest 
  breadth 
  about 
  0-4 
  mm., 
  ratio 
  1 
  -6 
  to 
  1. 
  The 
  midrib 
  and 
  external 
  buttress 
  

   are 
  not 
  strongly 
  developed 
  ; 
  and 
  the 
  terminal 
  seta 
  (fig. 
  24, 
  c) 
  (which 
  appears 
  to 
  be 
  

   single) 
  is 
  small, 
  about 
  one-tenth 
  the 
  length 
  of 
  the 
  paddle, 
  divided 
  at 
  its 
  end. 
  

  

  Fig. 
  24. 
  Pupa 
  of 
  Culex 
  macfiei, 
  Edw. 
  : 
  a, 
  trumpet 
  

  

  c, 
  terminal 
  seta 
  of 
  paddle. 
  

  

  b, 
  dorsal 
  view 
  of 
  abdomen 
  ; 
  

  

  The 
  dorsal 
  abdominal 
  setae 
  are 
  moderately 
  well 
  developed. 
  The 
  lateral 
  setae 
  (A) 
  

   on 
  segment 
  viii 
  are 
  tufts 
  about 
  half 
  the 
  length 
  of 
  the 
  paddles 
  composed 
  of 
  about 
  

   seven 
  subplumose 
  hairs, 
  which 
  are 
  often 
  branched 
  ; 
  on 
  segment 
  vii 
  similar 
  but 
  smaller 
  

   tufts 
  of 
  about 
  three 
  or 
  four 
  hairs 
  ; 
  and 
  on 
  segments 
  iii 
  to 
  vi 
  long 
  single 
  hairs. 
  The 
  

   sublateral 
  setae 
  (B) 
  on 
  segment 
  vii 
  are 
  small, 
  delicate, 
  single 
  or 
  double, 
  not 
  reaching 
  

   across 
  the 
  eighth 
  segment 
  ; 
  on 
  segment 
  vi 
  stouter, 
  longer, 
  double 
  setae 
  ; 
  and 
  on 
  

   segments 
  iv 
  to 
  v 
  long 
  tufts 
  of 
  about 
  three 
  to 
  five 
  hairs 
  reaching 
  back 
  beyond 
  the 
  

   posterior 
  margin 
  of 
  the 
  following 
  segment 
  ; 
  these 
  setae 
  are 
  slightly 
  subplumose 
  or 
  

   pubescent. 
  The 
  submedian 
  setae 
  (C) 
  on 
  segments 
  v 
  to 
  vii 
  are 
  delicate, 
  single 
  or 
  

  

  