﻿A 
  NEW 
  EAST 
  AFRICAN 
  TSETSE-FLY. 
  315 
  

  

  which, 
  although 
  I 
  had 
  never 
  met 
  with 
  it, 
  this 
  fly 
  rather 
  resembles, 
  except 
  in 
  size. 
  

   On 
  meeting 
  with 
  it 
  in 
  the 
  field, 
  noting 
  its 
  appearance 
  when 
  fresh, 
  examining 
  its 
  

   genitalia 
  and 
  its 
  puparia, 
  and 
  observing 
  its 
  habits, 
  breeding 
  and 
  other 
  — 
  knowing 
  

   G. 
  morsitans 
  thoroughly 
  from 
  all 
  over 
  the 
  Territory 
  and 
  having 
  had 
  experience 
  of 
  

   that 
  species 
  in 
  Portuguese 
  East 
  Africa 
  — 
  I 
  was 
  convinced 
  at 
  once 
  that 
  we 
  were 
  dealing 
  

   with 
  a 
  new 
  fly." 
  

  

  Puparium 
  of 
  G. 
  swynnertoni 
  (fig. 
  3, 
  b). 
  — 
  The 
  breeding-places 
  of 
  this 
  species 
  are 
  

   dealt 
  with 
  elsewhere 
  in 
  this 
  number 
  by 
  Mr. 
  Swynnerton 
  himself.* 
  

  

  Measurements 
  of 
  five 
  perfect 
  puparia 
  examined 
  in 
  the 
  position 
  shown 
  in 
  fig. 
  3, 
  

   i.e., 
  ventral 
  side 
  uppermost, 
  with 
  the 
  tumid 
  lips 
  ("polypneustic 
  lobes 
  " 
  of 
  Newstead) 
  

   directed 
  away 
  from 
  the 
  observer, 
  are 
  as 
  follows 
  : 
  — 
  length, 
  5-6 
  to 
  6-2 
  mm. 
  ; 
  greatest 
  

   breadth 
  (across 
  region 
  of 
  sixth 
  larval 
  segment), 
  3-2 
  to 
  3-5 
  mm. 
  A 
  comparison 
  with 
  

   a 
  series 
  of 
  G. 
  morsitans 
  puparia, 
  examined 
  in 
  a 
  corresponding 
  position, 
  shows 
  that, 
  

   although 
  the 
  actual 
  dimensions 
  of 
  the 
  puparium 
  of 
  the 
  new 
  species 
  are 
  but 
  slightly 
  

   greater, 
  there 
  are, 
  as 
  will 
  be 
  seen 
  from 
  the 
  above 
  figures, 
  certain 
  conspicuous 
  differences. 
  

   The 
  most 
  noteworthy 
  of 
  these 
  are 
  as 
  follows 
  : 
  — 
  

  

  Shape. 
  — 
  Less 
  regularly 
  oval, 
  the 
  puparium 
  of 
  G. 
  swynnertoni 
  being 
  widest 
  across 
  

   the 
  region 
  of 
  the 
  sixth 
  larval 
  segment. 
  

  

  Tumid 
  lips. 
  — 
  Smaller 
  than 
  those 
  of 
  the 
  puparium 
  of 
  G. 
  morsitans, 
  but 
  separated 
  

   by 
  a 
  wider 
  notch. 
  

  

  Notch 
  between 
  tumid 
  lips. 
  — 
  Closely 
  resembling 
  in 
  shape 
  that 
  exhibited 
  by 
  the 
  

   puparium 
  of 
  G. 
  pallidipes, 
  Austen. 
  

  

  * 
  See 
  p. 
  333, 
  and 
  Plates 
  xvi 
  and 
  xvii. 
  

  

  