﻿438 
  

  

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

  

  hairs 
  ; 
  on 
  segment 
  vii 
  are 
  similar 
  tufts 
  of 
  five 
  or 
  six 
  hairs 
  ; 
  on 
  segments 
  iii 
  to 
  vi 
  

   are 
  delicate 
  tufts 
  composed 
  of 
  three 
  to 
  five 
  hairs. 
  The 
  sublateral 
  dorsal 
  setae 
  on 
  

   segments 
  v 
  and 
  vi 
  are 
  long 
  double 
  hairs 
  reaching 
  nearly 
  across 
  the 
  two 
  following 
  

   segments 
  ; 
  on 
  segment 
  vii 
  is 
  a 
  much 
  shorter 
  hair 
  ; 
  and 
  on 
  segment 
  iv 
  a 
  long, 
  usually 
  

   triple 
  hair 
  (quadruple 
  in 
  the 
  specimen 
  figured) 
  reaching 
  across 
  the 
  following 
  segment 
  

   and 
  often 
  half 
  of 
  the 
  one 
  beyond 
  that. 
  The 
  submedian 
  setae 
  are 
  tufts 
  increasing 
  

   in 
  size 
  from 
  a 
  small 
  tuft 
  of 
  two 
  or 
  three 
  hairs 
  on 
  segment 
  vii 
  to 
  a 
  larger 
  tuft 
  on 
  

   segments 
  iii 
  and 
  iv 
  composed 
  of 
  ten 
  to 
  sixteen 
  and 
  ten 
  or 
  eleven 
  hairs 
  respectively. 
  

   On 
  segment 
  viii 
  the 
  seta 
  (P) 
  at 
  the 
  root 
  of 
  the 
  paddle 
  is 
  slender 
  and 
  double. 
  On 
  

   segment 
  ii 
  the 
  seta 
  (A') 
  is, 
  as 
  in 
  C. 
  guiarti, 
  very 
  long 
  and 
  single. 
  The 
  dendritic 
  tuft 
  

   on 
  segment 
  i 
  is 
  well 
  developed. 
  

  

  Diagnosis. 
  — 
  This 
  pupa 
  resembles 
  closely 
  that 
  of 
  C. 
  guiarti, 
  but 
  appears 
  to 
  be 
  

   more 
  robust 
  and 
  is 
  generally 
  more 
  heavily 
  chitinised. 
  It 
  may 
  be 
  distinguished 
  from 
  

   it, 
  to 
  mention 
  only 
  one 
  character, 
  by 
  the 
  sublateral 
  setae 
  on 
  segment 
  iv, 
  which 
  are 
  

   long, 
  usually 
  triple 
  hairs 
  reaching 
  across 
  the 
  following 
  segment 
  and 
  not 
  shorter 
  

   tufts 
  of 
  about 
  five 
  hairs. 
  

  

  Habitat. 
  — 
  Accra, 
  26. 
  ix. 
  1921, 
  a 
  single 
  larva 
  collected 
  in 
  a 
  pool 
  on 
  the 
  western 
  

   side 
  of 
  Korley 
  Gona 
  ; 
  Ofako, 
  a 
  village 
  about 
  nine 
  miles 
  north 
  of 
  Accra, 
  on 
  the 
  Nsawam 
  

   road, 
  5.vi.l922, 
  larvae 
  found 
  in 
  a 
  pool 
  in 
  a 
  swamp 
  ; 
  in 
  the 
  same 
  pool 
  were 
  also 
  larvae 
  

   of 
  Anopheles 
  marshalli. 
  

  

  Fig. 
  22. 
  Pupa 
  of 
  Culex 
  grahami, 
  Theo. 
  

  

  trumpet 
  ; 
  b, 
  dorsal 
  view 
  of 
  abdomen. 
  

  

  Culex 
  (Culiciomyia) 
  macfiei, 
  Edw. 
  

  

  Larva. 
  — 
  Length 
  about 
  4 
  mm. 
  when 
  fully 
  grown 
  ; 
  siphon 
  long, 
  about 
  1-3 
  mm., 
  

   and 
  dark 
  brown. 
  

  

  Head 
  (fig. 
  23) 
  large, 
  almost 
  as 
  broad 
  as 
  the 
  thorax, 
  not 
  very 
  highly 
  chitinised, 
  

   length 
  about 
  0-8 
  mm., 
  greatest 
  breadth 
  about 
  0-9 
  mm. 
  Eyes 
  large, 
  situated 
  at 
  the 
  

   broadest 
  part 
  of 
  the 
  head. 
  Antennae 
  about 
  0-4 
  mm. 
  long, 
  slightly 
  curved, 
  a 
  little 
  

   infuscated, 
  especially 
  at 
  the 
  ends, 
  spiculated 
  over 
  the 
  basal 
  two-thirds, 
  and 
  bearing 
  

   a 
  well-developed 
  tuft 
  of 
  subplumose 
  hairs 
  at 
  about 
  three-quarters 
  of 
  the 
  length 
  from 
  

   the 
  base. 
  The 
  pre-antennal 
  hair 
  of 
  Lang 
  is 
  a 
  small, 
  simple, 
  single 
  hair, 
  the 
  outer 
  

   post-antennal 
  a 
  well 
  developed 
  tuft 
  of 
  about 
  eight 
  subplumose 
  hairs, 
  the 
  mid 
  post- 
  

   antennal 
  a 
  long, 
  double, 
  subplumose 
  hair, 
  and 
  the 
  inner 
  post-antennal 
  a 
  similar 
  

   long 
  hair, 
  which 
  is 
  triple. 
  Mental 
  plate 
  (fig. 
  23, 
  a) 
  rather 
  small, 
  with 
  a 
  large, 
  pointed, 
  

   central 
  tooth 
  and 
  about 
  nine 
  smaller 
  teeth 
  on 
  each 
  side 
  of 
  it. 
  

  

  