﻿the 
  Hessian 
  Fly. 
  

  

  359 
  

  

  Flies 
  and 
  Parasites 
  bred 
  from 
  Puparia 
  from 
  American 
  

   " 
  Fall 
  Wheat." 
  

  

  Date. 
  

  

  Flies. 
  

  

  1889. 
  

  

  <T 
  

  

  ? 
  

  

  May 
  5 
  

  

  

  1 
  

  

  6 
  

  

  6 
  

  

  2 
  

  

  7 
  

  

  4 
  

  

  7 
  

  

  8 
  

  

  7 
  

  

  7 
  

  

  9 
  

  

  3 
  

  

  5 
  

  

  10 
  

  

  7 
  

  

  3 
  

  

  11 
  

  

  3 
  

  

  4 
  

  

  12 
  

  

  6 
  

  

  3 
  

  

  13 
  

  

  5 
  

  

  1 
  

  

  14 
  

  

  1 
  

  

  

  15 
  

  

  2 
  

  

  1 
  

  

  16 
  

  

  

  2 
  

  

  22 
  

  

  

  1 
  

  

  <? 
  

  

  44 
  

  

  37 
  

  

  ? 
  

  

  37 
  

   81 
  

  

  

  Date. 
  

  

  1889. 
  

  

  June 
  5 
  

   13 
  

   16 
  

  

  July 
  5 
  

  

  Parasites 
  

  

  ? 
  sex 
  

  

  5 
  

  

  10 
  

  

  4 
  

  

  3 
  

  

  22 
  Parasites 
  bred. 
  

  

  On 
  June 
  11th 
  I 
  sent 
  over 
  300 
  of 
  the 
  parasite, 
  Semio- 
  

   tellus 
  nigrijjes, 
  to 
  Prof. 
  Eiley 
  for 
  the 
  purpose 
  of 
  accli- 
  

   matisation, 
  but 
  owing 
  to 
  the 
  heat, 
  &c., 
  surrounding 
  the 
  

   mail 
  bags, 
  all 
  died 
  in 
  transit. 
  In 
  the 
  course 
  of 
  February 
  

   and 
  March 
  I 
  hope 
  to 
  be 
  able 
  to 
  send 
  a 
  large 
  number 
  of 
  

   puparia 
  picked 
  from 
  screenings, 
  and 
  no 
  doubt 
  from 
  these 
  

   Prof. 
  Eiley 
  and 
  his 
  assistants 
  will 
  be 
  able 
  to 
  breed 
  this 
  

   exceedingly 
  plentiful 
  and 
  most 
  useful 
  parasite 
  in 
  such 
  

   numbers 
  that 
  it 
  will 
  soon 
  obtain 
  a 
  footing 
  in 
  the 
  United 
  

   States, 
  and, 
  I 
  trust, 
  will 
  make 
  its 
  presence 
  felt. 
  

  

  Since 
  reading 
  this 
  paper, 
  I 
  have 
  sent 
  over 
  2000 
  puparia 
  

   to 
  Prof. 
  Riley, 
  of 
  the 
  U. 
  S. 
  Department 
  of 
  Agriculture 
  at 
  

   Washington, 
  and 
  to-day. 
  May 
  8th, 
  have 
  received 
  a 
  letter 
  

   as 
  follows 
  : 
  — 
  " 
  I 
  duly 
  received 
  your 
  favour 
  of 
  April 
  9th, 
  

   and 
  the 
  accompanying 
  box 
  of 
  puparia. 
  I 
  am 
  glad 
  to 
  say 
  

   that 
  these 
  arrived 
  in 
  good 
  condition, 
  and 
  that 
  many 
  of 
  

   the 
  parasites 
  have 
  already 
  begun 
  to 
  issue 
  ; 
  and 
  that 
  I 
  

   have 
  made 
  arrangements 
  to 
  distribute 
  them 
  at 
  four 
  

   different 
  points, 
  so 
  that 
  I 
  think 
  the 
  result 
  of 
  this 
  

   experiment 
  will 
  be 
  satisfactory." 
  

  

  During 
  Sept., 
  1888, 
  I 
  found 
  the 
  puparia 
  exceedingly 
  

   plentiful 
  all 
  round 
  the 
  neighbourhood 
  of 
  Stroud, 
  Glou- 
  

   cestershire, 
  which 
  is 
  the 
  most 
  westerly 
  point 
  where 
  "the 
  

  

  