﻿In 
  the 
  field 
  where 
  most 
  of 
  these 
  observations 
  were 
  made 
  an 
  attempt 
  

   was 
  made 
  to 
  intensify 
  an 
  attack 
  of 
  Sporotriclmm 
  among 
  insects 
  

   already 
  visibly 
  infected 
  by 
  it. 
  To 
  this 
  end 
  the 
  contents 
  of 
  a 
  culture 
  

   jar, 
  profusely 
  fruiting, 
  were 
  scattered 
  May 
  23 
  in 
  the 
  edge 
  of 
  a 
  field 
  

   of 
  wheat 
  heavily 
  infested 
  by 
  chinch-bugs, 
  and 
  the 
  grain 
  was 
  trampled 
  

   down 
  where 
  the 
  infection 
  material 
  was 
  distributed, 
  to 
  form 
  a 
  mat 
  of 
  

   vegetation 
  which 
  might 
  help 
  to 
  retain 
  the 
  moisture 
  of 
  the 
  soil 
  The 
  

   subsequent 
  course 
  of 
  events 
  in 
  -this 
  field, 
  as 
  shown 
  in 
  the 
  foregoing 
  

   narrative, 
  was 
  not 
  such 
  as 
  to 
  satisfy 
  us 
  that 
  any 
  noticeable 
  stimulus 
  

   to 
  the 
  spread 
  of 
  Sporotrichum 
  had 
  been 
  thus 
  supplied. 
  

  

  August 
  31. 
  Chinch-bugs 
  in 
  considerable 
  numbers 
  on 
  University 
  

   premises 
  at 
  })ase 
  of 
  broom-corn 
  stalks, 
  and 
  also 
  upon 
  the 
  flowering- 
  

   heads 
  of 
  this 
  plant. 
  All 
  stages 
  represented 
  but 
  that 
  just 
  from 
  the 
  

  

  Septemhev 
  ii. 
  Pupa' 
  and 
  adults 
  observed 
  at 
  the 
  tips 
  of 
  green 
  

   ears 
  of 
  corn. 
  

  

  Sepiemher 
  23. 
  Numerous 
  at 
  base 
  of 
  stalks 
  of 
  Katfir 
  corn, 
  mostly 
  

   adults, 
  but 
  all 
  other 
  stages 
  represented. 
  No 
  evidences 
  of 
  disease 
  

   among 
  them. 
  

  

  Sepie)nber 
  28. 
  All 
  stages 
  of 
  chinch-bugs 
  collected 
  on 
  Kaffir 
  corn, 
  

   including 
  a 
  single 
  one 
  just 
  hatched 
  from 
  the 
  egg 
  and 
  two 
  of 
  the 
  

   second 
  stage. 
  Adults 
  most 
  numerous. 
  The 
  weather 
  of 
  August 
  

   had 
  been 
  fairly 
  moist 
  — 
  3 
  77 
  inches 
  of 
  rain 
  for 
  the 
  month, 
  with 
  

   only 
  one 
  heavy 
  storm 
  (1.20 
  in.). 
  The 
  temperature 
  had 
  been 
  high, 
  

   the 
  maximum 
  ranging 
  from 
  78° 
  to 
  97°, 
  with 
  an 
  average 
  maxi- 
  

   mum 
  of 
  84.4. 
  The 
  September 
  weather 
  had 
  been 
  more 
  moist, 
  

   rain 
  falling 
  on 
  thirteen 
  days 
  and 
  amounting 
  to 
  5.84 
  inches. 
  The 
  

   maximum 
  thermometer 
  readings 
  for 
  this 
  month 
  run 
  from 
  60° 
  to 
  

   91° 
  and 
  the 
  minimum 
  from 
  30° 
  to 
  68°. 
  

  

  October 
  .5. 
  Warm, 
  bright 
  day, 
  and 
  chinch-bugs 
  flying 
  abundantly 
  

   in 
  every 
  direction, 
  resorting 
  evidently 
  to 
  winter 
  quarters. 
  

  

  Champaign 
  Countij, 
  Mahomet.— 
  J/dij 
  7. 
  Wheat 
  and 
  rye 
  were 
  here 
  

   largely 
  harvested, 
  and 
  the 
  bugs 
  had 
  consequently 
  made 
  their 
  waj- 
  

   into 
  the 
  borders 
  of 
  fields 
  of 
  corn 
  and 
  oats, 
  penetrating 
  the 
  former 
  

   forty 
  rows 
  or 
  more 
  and 
  threatening 
  considerable 
  injury. 
  In 
  some 
  

   cases 
  siiigle 
  stalks 
  were 
  estimated 
  to 
  bear 
  three 
  or 
  four 
  thousand 
  

   bugs. 
  The 
  situation 
  was 
  particularly 
  interesting 
  l)ecause 
  of 
  the 
  ex- 
  

   tensive 
  prevalence 
  of 
  disease, 
  that 
  produced 
  by 
  Entomopltthora 
  

   aphidis 
  predominating 
  greatly, 
  but 
  Sporotrichum 
  also 
  being 
  very 
  

   much 
  more 
  abundant 
  here 
  than 
  at 
  Urbana. 
  The 
  outbreak 
  of 
  

   Entomophthora 
  was, 
  in 
  fact, 
  more 
  marked 
  than 
  any 
  other 
  which 
  has 
  

   come 
  to 
  our 
  notice. 
  It 
  was 
  probal)ly 
  due 
  to 
  this 
  and 
  its 
  companion 
  

   disease 
  that 
  the 
  bugs 
  were 
  already 
  much 
  less 
  numerous, 
  according 
  to 
  

   farmers' 
  reports, 
  than 
  they 
  liad 
  l)een 
  a 
  short 
  time 
  before. 
  Very 
  

   nearly 
  all 
  were 
  either 
  pupa- 
  or 
  adults, 
  the 
  latter, 
  of 
  course, 
  of 
  the 
  

   new 
  generation. 
  The 
  dead 
  found 
  were 
  consequently 
  not 
  spent 
  

   imagos, 
  and 
  the 
  deaths 
  occurring 
  were 
  not 
  due 
  to 
  age. 
  Bugs 
  killed 
  

   with 
  Entomophthora 
  were 
  so 
  abundant 
  in 
  one 
  badly 
  infested 
  field 
  

   that 
  as 
  many 
  as 
  sixty 
  dead 
  were 
  counted 
  upon 
  a 
  single 
  leaf 
  of 
  corn. 
  

  

  