﻿66 
  

  

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

  

  A 
  little 
  above 
  the 
  posterior 
  angle 
  of 
  the 
  7th 
  segment 
  is 
  a 
  tuft 
  of 
  3 
  to 
  6 
  subplumose 
  

   or 
  pubescent 
  hairs, 
  which 
  are 
  usually 
  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 
  angles 
  of 
  the 
  segments 
  anterior 
  to 
  the 
  7th 
  are 
  single 
  hairs, 
  those 
  on 
  the 
  6th 
  

   and 
  5th 
  segments 
  being 
  strongly 
  developed 
  and 
  the 
  others 
  more 
  feebly. 
  

  

  Of 
  the 
  other 
  hairs 
  on 
  the 
  abdominal 
  segments 
  the 
  most 
  important 
  are 
  those 
  forming 
  

   the 
  inner 
  and 
  outer 
  lateral 
  rows. 
  On 
  the 
  4th 
  to 
  the 
  6th 
  segments 
  the 
  hairs 
  in 
  both 
  

   these 
  rows 
  are 
  long 
  single, 
  double, 
  or 
  triple 
  hairs, 
  those 
  on 
  the 
  more 
  anterior 
  segments 
  

   being 
  usually 
  but 
  not 
  invariably 
  more 
  sub-divided 
  than 
  those 
  on 
  the 
  more 
  posterior 
  

   segments 
  : 
  on 
  the 
  7th 
  segment 
  the 
  hair 
  belonging 
  to 
  the 
  outer 
  lateral 
  row 
  is 
  small, 
  

   that 
  belonging 
  to 
  the 
  inner 
  lateral 
  row 
  a 
  small 
  double 
  or 
  single 
  hair. 
  These 
  hairs, 
  

   which 
  are 
  rather 
  variable, 
  are 
  shown 
  in 
  the 
  figure 
  ; 
  it 
  will 
  be 
  observed 
  that 
  they 
  

   differ 
  from 
  the 
  corresponding 
  hairs 
  of 
  the 
  pupa 
  of 
  C. 
  quasigelidus. 
  On 
  the 
  3rd 
  seg- 
  

   ment 
  the 
  most 
  conspicuous 
  hairs 
  are 
  a 
  small 
  tuft 
  in 
  line 
  with 
  the 
  inner 
  lateral 
  row, 
  

   a 
  single 
  hair 
  above 
  and 
  a 
  little 
  external 
  to 
  this 
  tuft, 
  and 
  a 
  second 
  small 
  tuft 
  above 
  and 
  

   external 
  to 
  the 
  single 
  hair. 
  The 
  dendritic 
  hairs 
  or 
  tufts 
  on 
  the 
  1st 
  segment 
  are 
  fairly 
  

   well 
  developed 
  and 
  have 
  about 
  8 
  or 
  9 
  primary 
  branches. 
  

  

  The 
  respiratory 
  trumpets 
  are 
  long, 
  averaging 
  nearly 
  1 
  mm. 
  in 
  length, 
  and 
  have 
  

   wide 
  apertures. 
  The 
  ratio 
  of 
  the 
  length 
  of 
  the 
  closed 
  part 
  of 
  the 
  tube, 
  the 
  meatus, 
  

   to 
  the 
  total 
  length 
  of 
  the 
  trumpet 
  is 
  about 
  1 
  to 
  1 
  "7. 
  

  

  Diagnosis. 
  — 
  This 
  pupa 
  may 
  readily 
  be 
  distinguished 
  from 
  the 
  pupa 
  of 
  C. 
  quasige- 
  

   lidus 
  (see 
  p. 
  67), 
  the 
  only 
  other 
  Culex 
  (sens, 
  str.) 
  pupa 
  known 
  to 
  have 
  infuscated 
  

   paddles, 
  as 
  follows. 
  

  

  Paddles. 
  

  

  Tuft 
  at 
  the 
  posterior 
  angle 
  

  

  of 
  8th 
  segment. 
  

   Hairs 
  at 
  the 
  posterior 
  angles 
  [ 
  Single 
  

  

  of 
  6th 
  and 
  5th 
  segments. 
  

  

  G. 
  ager 
  var. 
  ethiopicus. 
  

  

  Infuscation 
  most 
  notable 
  on 
  

   the 
  inner 
  blade, 
  and 
  extend- 
  

   ing 
  almost 
  to 
  the 
  base 
  on 
  

   this 
  blade. 
  

  

  8-9 
  hairs. 
  

  

  Trumpets. 
  

  

  Not 
  unusually 
  narrow, 
  

   mouthed. 
  

  

  wide- 
  

  

  G. 
  quasigelidus. 
  

  

  Infuscation 
  not 
  extending 
  

   more 
  than 
  half 
  way 
  down 
  

   the 
  paddle 
  at 
  any 
  point. 
  

  

  5-7 
  hairs. 
  

  

  Triple 
  or 
  quadruple. 
  

  

  Very 
  long 
  and 
  narrow. 
  

  

  Habitat. 
  — 
  Larvae 
  and 
  pupae 
  of 
  this 
  mosquito 
  were 
  found 
  during 
  June 
  and 
  July 
  

   in 
  swamps 
  or 
  in 
  pools 
  of 
  clear 
  water 
  containing 
  algae 
  (Spirogyra) 
  at 
  many 
  places 
  in 
  

   the 
  Northern 
  Territories 
  of 
  the 
  Gold 
  Coast, 
  e.g., 
  at 
  Gambaga, 
  Bawku, 
  Navara, 
  Tumu, 
  

   Wa, 
  Bole, 
  etc. 
  

  

  Culex 
  quasigelidus, 
  Theo. 
  

  

  Larva. 
  — 
  The 
  larva 
  of 
  this 
  mosquito 
  has 
  been 
  described 
  by 
  Wesche 
  (Bull. 
  Ent. 
  

   Res. 
  i, 
  pp. 
  38 
  and 
  39), 
  and 
  Edwards 
  (loc.cit., 
  p. 
  383) 
  has 
  noted 
  some 
  age 
  differences. 
  

   Two 
  fully 
  developed 
  larvae 
  examined 
  by 
  us 
  showed 
  the 
  following 
  characters, 
  which 
  

   supplement 
  the 
  previous 
  description 
  : 
  the 
  mental 
  plate 
  small 
  and 
  composed 
  of 
  a 
  

   median 
  toothwith 
  about 
  six 
  (5 
  to 
  6) 
  teeth 
  on 
  each 
  side; 
  the 
  comb 
  of 
  about 
  six 
  (6 
  to 
  7) 
  

  

  