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  Capt. 
  Carpenter's 
  method 
  was 
  founded 
  on 
  the 
  fact 
  that 
  the 
  

   fly 
  always 
  seeks 
  shelter 
  for 
  depositing 
  its 
  larvae, 
  which 
  were 
  

   killed 
  by 
  the 
  sun. 
  Hence 
  the 
  idea 
  of 
  making 
  artificial 
  shelters 
  

   from 
  which 
  the 
  puparia 
  could 
  be 
  collected 
  at 
  intervals. 
  Prof. 
  

   Poulton 
  thought 
  that 
  if 
  the 
  destruction 
  of 
  the 
  puparia 
  were 
  

   the 
  end 
  in 
  view 
  this 
  could 
  be 
  achieved 
  more 
  certainly 
  and 
  

   simply 
  by 
  moving 
  the 
  shelters 
  from 
  time 
  to 
  time, 
  and 
  exposing 
  

   everything 
  beneath 
  to 
  the 
  rays 
  of 
  the 
  tropical 
  sun. 
  The 
  

   shelters 
  could 
  be 
  made 
  with 
  two 
  handles 
  on 
  each 
  side 
  and 
  of 
  

   such 
  a 
  weight 
  that 
  each 
  could 
  be 
  easily 
  moved 
  by 
  two 
  men. 
  

   Later 
  on, 
  if 
  the 
  method 
  proved 
  a 
  success, 
  automatically- 
  

   moved 
  shelters 
  with 
  a 
  clockwork 
  release 
  could 
  be 
  employed. 
  

   In 
  bringing 
  forward 
  these 
  interesting 
  and, 
  it 
  was 
  to 
  be 
  hoped, 
  

   fruitful, 
  experiments, 
  Prof. 
  Poulton 
  wished 
  also 
  to 
  draw 
  

   attention 
  to 
  the 
  important 
  researches 
  in 
  the 
  same 
  field 
  of 
  

   inquiry 
  by 
  Mr. 
  W. 
  A. 
  Lambom 
  (Bull. 
  Ent. 
  Res., 
  May 
  1916, 
  

   vii., 
  p. 
  38). 
  

  

  " 
  March 
  31, 
  1919. 
  Entebbe. 
  

  

  " 
  I'm 
  sending 
  you 
  per 
  registered 
  post, 
  the 
  batch 
  of 
  pupae 
  

   collected 
  from 
  my 
  island 
  shelters. 
  I 
  wrote 
  about 
  a 
  week 
  ago 
  

   to 
  say 
  the 
  number 
  was 
  going 
  up 
  satisfactorily 
  every 
  week, 
  

   and 
  this 
  last 
  week 
  showed 
  a 
  further 
  increase, 
  so 
  that 
  I 
  got 
  an 
  

   average 
  of 
  48 
  per 
  shelter 
  on 
  Bulago 
  and 
  64 
  on 
  Kimmi, 
  a 
  total 
  

   of 
  about 
  700 
  pupae 
  from 
  the 
  two 
  islands, 
  most 
  of 
  which 
  I 
  now 
  

   send. 
  Since 
  they 
  were 
  deposited 
  between 
  March 
  19 
  and 
  26 
  

   they 
  are 
  still 
  young, 
  so 
  that 
  I 
  tliink 
  many 
  will 
  be 
  still 
  un- 
  

   hatched 
  by 
  the 
  time 
  they 
  reach 
  you. 
  When 
  you 
  open 
  the 
  

   box 
  you 
  will 
  find 
  a 
  horrid 
  mass 
  of 
  squashed 
  emerged 
  flies, 
  

   undeveloped, 
  but 
  if 
  you 
  put 
  the 
  pupae 
  that 
  remain 
  in 
  warm, 
  

   damp 
  atmosphere, 
  on 
  dry 
  sand 
  (e. 
  g. 
  a 
  tray 
  in 
  a 
  fern 
  case), 
  

   they 
  should 
  develop 
  all 
  right, 
  and 
  may 
  be 
  of 
  interest 
  to 
  

   entomologists 
  at 
  Oxford. 
  

  

  " 
  Perhaps 
  it 
  would 
  be 
  an 
  interesting 
  exhibit 
  at 
  the 
  Entomo- 
  

   logical 
  Society, 
  and 
  Fellows 
  who 
  like 
  the 
  experience, 
  by 
  placing 
  

   their 
  bare 
  arms 
  against 
  the 
  gauze 
  side 
  of 
  the 
  cage 
  can 
  have 
  

   the 
  privilege 
  of 
  being 
  bitten 
  by 
  G. 
  folfalis 
  without 
  any 
  risk 
  

   whatever 
  ! 
  If 
  you 
  like 
  to 
  feed 
  them 
  regularly 
  (they 
  will 
  bite 
  

   a 
  fowl 
  if 
  the 
  feathers 
  are 
  cropped 
  and 
  it 
  is 
  held 
  against 
  the 
  

   cage) 
  there 
  is 
  no 
  reason 
  why 
  they 
  shouldn't 
  breed 
  in 
  the 
  

  

  