﻿62 
  

  

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

  

  most 
  important 
  are 
  those 
  which 
  form 
  the 
  outer 
  and 
  inner 
  lateral 
  rows 
  on 
  each 
  

   side 
  on 
  the 
  dorsum 
  of 
  the 
  abdomen. 
  The 
  hairs 
  forming 
  the 
  outer 
  lateral 
  row 
  are 
  

   branched. 
  Those 
  forming 
  the 
  inner 
  lateral 
  row 
  are 
  long 
  single, 
  double, 
  or 
  triple 
  

   hairs 
  on 
  the 
  7th, 
  6th 
  and 
  5th 
  segments, 
  and 
  branched 
  hairs, 
  similar 
  to 
  those 
  in 
  

   the 
  outer 
  lateral 
  row, 
  on 
  the 
  4th 
  and 
  3rd 
  segments. 
  The 
  dendritic 
  hairs 
  or 
  tufts 
  

   on 
  the 
  1st 
  segment 
  are 
  well 
  developed. 
  

  

  The 
  respiratory 
  trumpets 
  are 
  about 
  '36 
  mm. 
  long 
  ; 
  the 
  pinna, 
  the 
  open 
  part, 
  

   extends 
  nearly 
  the 
  whole 
  length 
  of 
  the 
  trumpet, 
  the 
  ratio 
  of 
  the 
  length 
  of 
  the 
  

   closed 
  portion, 
  the 
  meatus, 
  to 
  the 
  total 
  length 
  of 
  the 
  trumpet 
  being 
  nearly 
  1 
  to 
  5. 
  

   There 
  does 
  not 
  appear 
  to 
  be 
  any 
  angle 
  formed 
  by 
  the 
  pinna 
  a 
  little 
  above 
  the 
  

   distal 
  margin 
  of 
  the 
  meatus, 
  such 
  as 
  there 
  is 
  in 
  A. 
  costalis. 
  

  

  Diagnosis. 
  — 
  The 
  pupa 
  of 
  A. 
  rufipes 
  has 
  to 
  be 
  distinguished 
  from 
  that 
  of 
  A. 
  mauri- 
  

   tianus 
  (neither 
  having 
  long 
  sharp 
  spines 
  at 
  the 
  posterior 
  angles 
  of 
  the 
  7th, 
  6th 
  

   and 
  5th 
  segments), 
  and 
  this 
  may 
  be 
  done 
  by 
  the 
  spine 
  at 
  the 
  posterior 
  angle 
  of 
  

   the 
  7th 
  segment, 
  which 
  is 
  long 
  and 
  curved 
  in 
  A. 
  rufipes, 
  but 
  short 
  and 
  straight 
  in 
  

   A. 
  mauritianus. 
  The 
  harp-shaped 
  form 
  of 
  the 
  dendritic 
  seta 
  on 
  the 
  8th 
  segment 
  

   of 
  A. 
  mauritianus 
  is 
  not 
  a 
  good 
  character, 
  as 
  it 
  is 
  inconstant. 
  

  

  Habitat. 
  — 
  The 
  two 
  pupae 
  on 
  which 
  the 
  above 
  description 
  is 
  based 
  were 
  found 
  

   in 
  pools 
  of 
  clear 
  water 
  collected 
  in 
  the 
  dry 
  bed 
  of 
  a 
  stream 
  near 
  the 
  garden 
  at 
  Bawku 
  

   in 
  the 
  Northern 
  Territories 
  of 
  the 
  Gold 
  Coast, 
  ll.vi.18. 
  With 
  them 
  were 
  associated 
  

   pupae 
  of 
  A. 
  funestus. 
  

  

  Ochlerotatus 
  hirsutus, 
  Theo. 
  

   Larva. 
  — 
  The 
  larva 
  of 
  this 
  mosquito 
  has 
  not 
  yet 
  been 
  identified. 
  

  

  Fig. 
  3. 
  Pupa 
  of 
  Ochlerotatus 
  hirsutus, 
  Theo. 
  

  

  Pupa 
  (fig. 
  3). 
  — 
  "the 
  pupa 
  is 
  large, 
  measuring 
  about 
  6 
  to 
  7 
  mm. 
  when 
  extended, 
  

   and 
  well 
  chitinised. 
  

  

  