﻿162 
  J. 
  W. 
  S. 
  MACFIE. 
  

  

  the 
  seventh 
  segment 
  was 
  single 
  on 
  the 
  right 
  side, 
  double 
  on 
  the 
  left 
  ; 
  the 
  former 
  

   measuring 
  266^, 
  and 
  the 
  latter 
  only 
  159/-* 
  in 
  length. 
  This 
  fact 
  is 
  not 
  specifically 
  

   mentioned 
  in 
  the 
  descriptions 
  which 
  follow, 
  but 
  should 
  be 
  understood. 
  

  

  It 
  has 
  been 
  stated 
  that 
  " 
  As 
  the 
  pupa 
  increases 
  in 
  age 
  additional 
  hairs 
  are 
  

   developed." 
  In 
  Stegomyia 
  fasciata 
  this 
  is 
  not 
  the 
  case, 
  the 
  pupa 
  immediately 
  after 
  

   it 
  has 
  shaken 
  itself 
  free 
  from 
  the 
  larval 
  skin 
  having 
  exactly 
  the 
  same 
  number 
  of 
  

   setae 
  as 
  pupae 
  one 
  or 
  two 
  days 
  old, 
  and 
  as 
  pelts 
  left 
  behind 
  after 
  the 
  emergence 
  of 
  

   the 
  adult 
  mosquitos. 
  The 
  setae 
  on 
  male 
  and 
  female 
  pupae 
  are 
  also 
  identical. 
  

  

  The 
  description 
  which 
  follows 
  is 
  based 
  on 
  the 
  comparison, 
  seta 
  by 
  seta, 
  of 
  ten 
  

   specimens 
  of 
  the 
  pupa 
  of 
  Stegomyia 
  fasciata. 
  

  

  Cephalo-thoracic 
  Setae. 
  

  

  The 
  setae 
  on 
  the 
  cephalo-thorax 
  are 
  few 
  in 
  number, 
  and 
  relatively 
  inconspicuous. 
  

   There 
  are 
  altogether 
  twenty-four, 
  namely 
  twelve 
  on 
  each 
  side 
  of 
  the 
  body. 
  

  

  Post-ocular 
  setae, 
  (fig. 
  1). 
  

  

  These 
  setae 
  are 
  situated 
  close 
  to 
  the 
  posterior 
  margin 
  of 
  the 
  eye, 
  and 
  are 
  some- 
  

   times 
  difficult 
  to 
  see 
  because, 
  being 
  directed 
  forwards 
  and 
  outwards, 
  they 
  are 
  apt 
  

   to 
  be 
  obscured 
  by 
  the 
  dark 
  ocular 
  pigment 
  behind 
  them. 
  In 
  a 
  pelt 
  they 
  are 
  also 
  

   difficult 
  to 
  find, 
  as 
  they 
  become 
  displaced 
  when 
  the 
  mosquito 
  emerges. 
  They 
  are 
  

   best 
  seen 
  in 
  pupae 
  which 
  have 
  been 
  macerated 
  in 
  caustic 
  potash. 
  There 
  are 
  three 
  

   post-ocular 
  setae, 
  namely 
  : 
  — 
  ■ 
  

  

  Superior 
  seta 
  (fig. 
  1, 
  1 
  ). 
  A 
  delicate 
  seta 
  of 
  moderate 
  length 
  situated 
  in 
  the 
  angle 
  

   formed 
  between 
  the 
  upper 
  posterior 
  margin 
  of 
  the 
  eye 
  and 
  the 
  lower 
  border 
  of 
  the 
  

   antenna 
  as 
  it 
  sweeps 
  backwards 
  ; 
  usually 
  single, 
  sometimes 
  double. 
  

  

  Median 
  seta 
  (fig. 
  1, 
  2 
  ). 
  A 
  small 
  delicate 
  seta 
  situated 
  just 
  behind 
  the 
  eye 
  near 
  

   its 
  lower 
  margin 
  ; 
  usually 
  double, 
  sometimes 
  single. 
  

  

  Inferior 
  seta 
  (fig. 
  1, 
  3 
  ). 
  A 
  delicate 
  seta 
  of 
  moderate 
  length 
  situated 
  a 
  little 
  below 
  

   the 
  median 
  seta 
  and 
  at 
  about 
  the 
  level 
  of 
  the 
  posterior 
  margin 
  of 
  the 
  eye 
  ; 
  usually 
  

   single, 
  but 
  in 
  one 
  specimen 
  triple 
  on 
  one 
  side. 
  

  

  An 
  tero- 
  thoracic 
  setae 
  (fig. 
  1). 
  

  

  These 
  setae 
  are 
  situated 
  at 
  the 
  anterior 
  margin 
  of 
  the 
  thorax, 
  or 
  rather 
  in 
  the 
  

   triangular 
  area 
  between 
  the 
  anterior 
  margin 
  of 
  the 
  thorax 
  and 
  the 
  upper 
  border 
  

   of 
  the 
  antenna 
  as 
  it 
  sweeps 
  backwards. 
  They 
  are 
  directed 
  forwards, 
  upwards, 
  

   and 
  outwards. 
  There 
  are 
  four 
  antero-thoracic 
  setae, 
  namely 
  : 
  — 
  ■ 
  

  

  Lower 
  anterior 
  seta 
  (fig. 
  1, 
  *). 
  A 
  delicate 
  seta 
  of 
  moderate 
  length 
  situated 
  a 
  little 
  

   above 
  the 
  antenna 
  and 
  a 
  little 
  behind 
  the 
  anterior 
  margin 
  of 
  the 
  cephalo-thorax 
  ; 
  

   double 
  or 
  triple. 
  

  

  Upper 
  anterior 
  seta 
  (fig. 
  1, 
  5 
  ). 
  A 
  delicate 
  seta 
  of 
  moderate 
  length 
  situated 
  above 
  

   and 
  slightly 
  posterior 
  to 
  the 
  lower 
  anterior 
  seta 
  ; 
  single, 
  double, 
  or 
  sometimes 
  triple. 
  

  

  Lower 
  posterior 
  seta 
  (fig. 
  1, 
  6 
  ). 
  A 
  stouter 
  and 
  longer 
  seta 
  than 
  any 
  of 
  the 
  preceding, 
  

   situated 
  just 
  above 
  the 
  eye 
  close 
  to 
  the 
  upper 
  margin 
  of 
  the 
  antenna 
  as 
  it 
  sweeps 
  

   backwards 
  ; 
  single. 
  

  

  Upper 
  posterior 
  seta 
  (fig. 
  1, 
  7 
  ). 
  A 
  seta 
  of 
  moderate 
  length 
  and 
  strength 
  situated 
  

   close 
  to, 
  and 
  immediately 
  behind 
  the 
  lower 
  posterior 
  seta; 
  generally 
  double,, 
  

   sometimes 
  single. 
  

  

  