﻿432 
  J. 
  W. 
  S. 
  MACFIE 
  AND 
  A. 
  INGRAM. 
  

  

  points, 
  which 
  appear 
  to 
  provide 
  distinguishing 
  features, 
  may 
  however 
  be 
  mentioned 
  ; 
  

   in 
  A. 
  (0.) 
  simulans, 
  according 
  to 
  Bacot, 
  the 
  terminal 
  seta 
  on 
  the 
  paddles 
  is 
  bifid 
  ; 
  

   in 
  A. 
  (0.) 
  wellmani 
  the 
  paddles 
  are 
  longer 
  and 
  narrower, 
  and 
  the 
  terminal 
  seta 
  on 
  

   them 
  is 
  relatively 
  shorter 
  ; 
  in 
  A. 
  (0.) 
  apicoannulatus 
  the 
  sublateral 
  setae 
  on 
  the 
  

   dorsum 
  of 
  segments 
  iv 
  to 
  vi 
  of 
  the 
  abdomen 
  are 
  longer 
  ; 
  and 
  in 
  A. 
  (0.) 
  irritans 
  the 
  

   paddles 
  are 
  larger, 
  the 
  respiratory 
  trumpets 
  shorter, 
  and 
  the 
  dorsal 
  setae 
  on 
  the 
  

   cephalothorax 
  smaller 
  tufts. 
  

  

  Habitat. 
  — 
  Ofako, 
  a 
  village 
  about 
  nine 
  miles 
  north 
  of 
  Accra 
  on 
  the 
  Nsawam 
  road, 
  

   v.-vi. 
  1922 
  ; 
  larvae 
  found 
  in 
  a 
  rot-hole 
  in 
  a 
  tree 
  in 
  dense 
  " 
  bush." 
  In 
  the 
  same 
  

   rot-hole 
  were 
  found 
  larvae 
  of 
  Megarhinus 
  (Toxorhynchites) 
  brevipalpis, 
  Aedes 
  (0.) 
  

   apicoannulatus, 
  and 
  C. 
  (Culiciomyia) 
  macfiei, 
  Edw., 
  a 
  new 
  species 
  of 
  which 
  the 
  

   description 
  is 
  published 
  above 
  (p. 
  399). 
  

  

  Aedes 
  (Stegomyia) 
  apicoargenieus, 
  Theo. 
  

  

  Larva. 
  — 
  The 
  larva 
  resembles 
  that 
  of 
  A. 
  (S.) 
  dendrophilus, 
  but 
  the 
  following 
  

   differences 
  may 
  be 
  noted. 
  The 
  siphon 
  is 
  perhaps 
  a 
  little 
  shorter, 
  length 
  about 
  

   twice 
  the 
  basal 
  width, 
  and 
  its 
  apical 
  fourth 
  is 
  paler 
  than 
  the 
  basal 
  three-quarters. 
  

   The 
  pecten 
  extends 
  in 
  a 
  somewhat 
  curved 
  line 
  for 
  from 
  one-third 
  to 
  nearly 
  one-half 
  

   the 
  length 
  of 
  the 
  siphon 
  and 
  is 
  composed 
  of 
  about 
  twelve 
  to 
  sixteen 
  spines, 
  which 
  

   have 
  long 
  sharp 
  points 
  and 
  well-developed 
  basal 
  barbs 
  (fig. 
  18, 
  c). 
  The 
  tuft 
  on 
  the 
  

   siphon 
  is 
  situated 
  just 
  beyond 
  the 
  last 
  spine 
  of 
  the 
  pecten 
  and 
  is 
  usually 
  double, 
  

   occasionally 
  single 
  or 
  triple. 
  The 
  hair 
  on 
  each 
  side 
  of 
  the 
  anal 
  segment 
  near 
  the 
  

   middle 
  of 
  the 
  posterior 
  margin 
  is 
  long, 
  and 
  in 
  all 
  the 
  specimens 
  examined 
  by 
  us, 
  

   single. 
  The 
  larva 
  also 
  closely 
  resembles 
  that 
  of 
  A. 
  (S.) 
  luteocephalus 
  , 
  and 
  although 
  

   there 
  are 
  several 
  characters 
  usually 
  unlike 
  — 
  such 
  as 
  the 
  long 
  hair 
  on 
  the 
  siphon 
  in 
  

   place 
  of 
  a 
  tuft 
  — 
  none 
  of 
  them 
  was 
  constantly 
  different. 
  

  

  Pupa. 
  — 
  The 
  pupa 
  also 
  resembles 
  that 
  of 
  A. 
  (S.) 
  dendrophilus, 
  indeed 
  we 
  were 
  

   unable 
  to 
  find 
  any 
  points 
  of 
  constant 
  difference. 
  From 
  the 
  pupa 
  of 
  A. 
  (S.) 
  luteo- 
  

   cephalus, 
  however, 
  it 
  differs 
  in 
  several 
  particulars, 
  notably 
  in 
  the 
  development 
  of 
  the 
  

   fringe 
  on 
  the 
  paddles. 
  

  

  Habitat. 
  — 
  Accra, 
  in 
  a 
  rot-hole 
  in 
  a 
  flamboyant 
  tree 
  (Poinciana 
  regia) 
  24.xii.1918 
  ; 
  

   Nsawam, 
  in 
  a 
  rot-hole 
  of 
  a 
  silk-cotton 
  tree, 
  26.iii.1920, 
  and 
  in 
  another 
  tree 
  of 
  unknown 
  

   species, 
  14.iv.1920. 
  

  

  TEH2IO 
  

  

  Fig. 
  18. 
  Larva 
  of 
  Aedes 
  apicoargenieus, 
  Theo. 
  : 
  a, 
  mental 
  plate 
  ; 
  b, 
  comb 
  scales 
  ; 
  

  

  c, 
  pecten 
  scales. 
  

  

  Aedes 
  (Stegomyia) 
  dendrophilus, 
  Edw. 
  

  

  Larva. 
  — 
  The 
  larva 
  has 
  a 
  darkly-coloured 
  head 
  and 
  siphon 
  tube 
  ; 
  length 
  about 
  

   5 
  mm. 
  The 
  following 
  description 
  is 
  based 
  on 
  the 
  examination 
  of 
  two 
  mature 
  larvae 
  

   and 
  six 
  larval 
  pelts. 
  

  

  Head 
  strongly 
  chitinised, 
  dark-coloured 
  ; 
  in 
  mature 
  specimens 
  length 
  and 
  greatest 
  

   breadth 
  about 
  equal 
  (0-7 
  mm.). 
  Antennae 
  dark, 
  especially 
  at 
  the 
  base, 
  not 
  covered 
  

   with 
  spicules, 
  and 
  bearing 
  a 
  single 
  small 
  hair 
  in 
  place 
  of 
  a 
  tuft, 
  length 
  about 
  0-3 
  mm. 
  

   Mid-frontal 
  hairs 
  single, 
  long 
  and 
  slender. 
  Eyes 
  large 
  and 
  well-formed. 
  Mental 
  

   plate 
  (fig. 
  19, 
  a) 
  rather 
  short 
  and 
  broad, 
  with 
  a 
  median 
  tooth 
  and 
  nine 
  to 
  twelve 
  

   smaller 
  teeth 
  on 
  each 
  side. 
  

  

  