﻿72 
  

  

  and 
  in 
  the 
  grass 
  adjacent 
  thousands 
  were 
  found 
  covered 
  with 
  

   Sporotrichum. 
  In 
  an 
  oats 
  field 
  near 
  by, 
  wiierever 
  they 
  had 
  resorted 
  

   to 
  fallen 
  corn 
  stalks 
  on 
  the 
  ground 
  for 
  shelter, 
  an 
  abundance 
  of 
  dead 
  

   covered 
  with 
  Sporotrichum 
  were 
  mingled 
  with 
  the 
  living. 
  

  

  July 
  8, 
  two 
  or 
  three 
  h\indred 
  living 
  specimens 
  collected 
  from 
  the 
  

   corti 
  were 
  placed 
  in 
  a 
  dry 
  box 
  without 
  cover 
  but 
  chalked 
  at 
  the 
  

   upper 
  edge 
  to 
  prevent 
  their 
  escape. 
  Green 
  corn 
  was 
  furnished 
  them 
  

   daily 
  for 
  food. 
  

  

  July 
  9, 
  about 
  eighty 
  dead 
  were 
  removed 
  from 
  this 
  lot 
  and 
  placed 
  

   in 
  a 
  Petri 
  dish 
  on 
  damp 
  sand. 
  By 
  afternoon 
  of 
  the 
  same 
  day 
  all 
  but 
  

   two 
  or 
  three 
  of 
  these 
  were 
  more 
  or 
  less 
  completely 
  covered 
  with 
  a 
  

   fresh 
  growth 
  of 
  Entomophthora, 
  most 
  of 
  it 
  not 
  yet 
  fruited, 
  butsome 
  al- 
  

   ready 
  bearing 
  spores. 
  By 
  the 
  following 
  day 
  all 
  but 
  one 
  were 
  im- 
  

   bedded 
  in 
  Entomophthora. 
  

  

  July 
  10, 
  eighteen 
  more 
  dead 
  in 
  this 
  collection 
  were 
  placed 
  on 
  

   damp 
  sand, 
  and 
  by 
  the 
  morning 
  of 
  July 
  11 
  fourteen 
  of 
  them 
  were 
  

   covered 
  with 
  Entomophthora. 
  On 
  the 
  20th 
  of 
  July 
  it 
  was 
  noticed 
  

   that 
  the 
  four 
  remaining 
  specimens 
  of 
  this 
  lot 
  were 
  profusely 
  cov- 
  

   ered 
  with 
  ripe 
  Sporotrichum. 
  

  

  July 
  11, 
  one 
  dead 
  bug 
  removed. 
  Covered 
  with 
  Entomophthora 
  

   July 
  18. 
  

  

  July 
  13, 
  one 
  dead 
  sp3cim3n 
  removed. 
  Coated 
  with 
  Entomoph- 
  

   thora 
  the 
  following 
  day. 
  

  

  July 
  14, 
  three 
  dead 
  were 
  removed. 
  July 
  15 
  and 
  10 
  only 
  one 
  

   more 
  each 
  day. 
  None 
  of 
  these 
  presented 
  later 
  any 
  fungus 
  growth. 
  

  

  Ninety-four 
  of 
  the 
  104 
  dead 
  bugs 
  removed 
  from 
  this 
  lot 
  developed 
  

   Entomophthora 
  an 
  I 
  only 
  four 
  of 
  them 
  S^)orotrichum. 
  

  

  The 
  parasitic 
  Entomophthora, 
  by 
  which 
  these 
  bugs 
  were 
  so 
  thor- 
  

   oughly 
  infested 
  when 
  brought 
  in 
  that 
  about 
  a 
  third 
  of 
  them 
  died 
  

   wit'iiti 
  tw3aty-foar 
  hoars, 
  had 
  n 
  )w 
  practically 
  disappeared 
  under 
  the 
  

   conditions 
  presant 
  in 
  oar 
  breeling 
  b 
  )x. 
  It 
  is 
  to 
  b3 
  observed, 
  how- 
  

   ever, 
  that 
  as 
  the 
  pirasitiz^l 
  bajjs 
  w 
  n'o 
  taken 
  out 
  from 
  am 
  )ng 
  their 
  

   felloA^? 
  a? 
  fut 
  ii 
  tiiif 
  ii3 
  I. 
  an 
  I 
  aviilly 
  b3f:)i*3 
  the 
  fun^oas 
  growth 
  

   had 
  matured, 
  little 
  opportunity 
  was 
  given 
  for 
  a 
  continuance 
  of 
  the 
  

   disease 
  among 
  them. 
  

  

  July 
  11, 
  a 
  large 
  number 
  of 
  chinch-bugs 
  collected 
  at 
  Mattoon 
  

   about 
  July 
  7 
  and 
  kept 
  since 
  in 
  an 
  open 
  box 
  were 
  transferred 
  to 
  an- 
  

   other 
  box 
  with 
  moist 
  earth, 
  fresh 
  food, 
  and 
  covering 
  of 
  large 
  leaves, 
  

   kept 
  moist 
  for 
  the 
  purpose 
  of 
  ascertaining 
  how 
  freely 
  and 
  promptly 
  

   Entomophthora 
  would 
  spread 
  amongthem 
  under 
  presumably 
  favonible 
  

   conditions. 
  July 
  bJ, 
  only 
  about 
  a 
  dozen 
  dead 
  exhibiting 
  Entomoph- 
  

   thora. 
  July 
  14, 
  little 
  if 
  any 
  change;bugs 
  dying 
  very 
  slowly. 
  July 
  ](), 
  

   twMity 
  specimens 
  of 
  Entomophthora 
  — 
  all 
  there 
  were 
  in 
  the 
  box 
  — 
  

   r'mo-'»l 
  f)r 
  exp3rim3ntal 
  us3. 
  July 
  2J, 
  about 
  a 
  dozen 
  bugs 
  dead 
  

   with 
  E 
  itomophthora. 
  T 
  1 
  3 
  gee 
  itir 
  pirt 
  aliv3 
  anl 
  app 
  ir3ntlv 
  haalthy. 
  ' 
  

   Exp3rim3n[; 
  in 
  g))l 
  co 
  i 
  lition 
  an 
  I 
  prop3rly 
  minag3d. 
  Spread 
  of 
  

   tins 
  infection 
  evidently 
  slow 
  and 
  slight. 
  

  

  