﻿102 
  

  

  one 
  lot 
  in 
  comparison 
  with 
  tlie 
  eighteen 
  lots 
  not 
  so 
  treated, 
  which 
  

   may 
  be 
  regarded 
  as 
  checks 
  upon 
  it. 
  In 
  the 
  lot 
  dusted 
  with 
  spores 
  

   of 
  Sporotrichum 
  ninety-tive 
  bugs 
  died 
  within 
  the 
  period 
  of 
  the 
  ex- 
  

   periment, 
  about 
  half 
  of 
  which 
  afterwards 
  exhibited 
  a 
  strong 
  growth 
  

   of 
  the 
  fungus, 
  while 
  the 
  number 
  of 
  deaths 
  in 
  the 
  eighteen 
  compan- 
  

   ion 
  lots 
  ranged 
  from 
  ten 
  to 
  forty-eight, 
  with 
  an 
  average 
  of 
  twenty- 
  

   six. 
  This 
  difference 
  is 
  rendered 
  more 
  significant 
  if 
  we 
  note 
  the 
  fact 
  

   that 
  Sporotrichum 
  appeared 
  to 
  some 
  extent 
  in 
  eight 
  of 
  the 
  foregoing 
  

   checks, 
  showing 
  that 
  some 
  at 
  least 
  of 
  the 
  twenty-six 
  bugs 
  of 
  the 
  

   above 
  average 
  had 
  died 
  under 
  the 
  influence 
  of 
  this 
  fungus. 
  If 
  we 
  

   further 
  notice 
  that 
  a 
  large 
  majority 
  of 
  the 
  dead, 
  bugs 
  appearing 
  in 
  

   these 
  lots 
  remained 
  free 
  from 
  this 
  fungus 
  growth, 
  notwithstanding 
  

   the 
  fact 
  that 
  a 
  part 
  of 
  them 
  exhibited 
  it. 
  w^e 
  shall 
  have 
  additional 
  

   evidence 
  of 
  the 
  comparative 
  rarity 
  of 
  the 
  occurrence 
  of 
  Sporo- 
  

   trichum 
  on 
  dead 
  chinch-bugs 
  under 
  natural 
  conditions 
  as 
  a 
  conse- 
  

   quence 
  of 
  post-moi'iem 
  infection. 
  

  

  