﻿51 
  

  

  of 
  the 
  gt'iieration 
  following 
  in 
  the 
  corn. 
  Botli 
  adults 
  and 
  young 
  

   continued 
  to 
  die 
  with 
  Sporotrichum 
  at 
  least 
  until 
  about 
  the 
  middle 
  

   of 
  August, 
  but 
  Entoniophthora 
  seemed 
  to 
  have 
  completely 
  dis- 
  

   appeared. 
  

  

  At 
  Mattoon. 
  in 
  May, 
  the 
  chinch-bugs 
  wore 
  mostly 
  in 
  the 
  wheat 
  — 
  

   little 
  of 
  which 
  was 
  raised 
  here 
  — 
  though 
  about 
  equally 
  abundant 
  in 
  

   rye. 
  Oats 
  were 
  considerably 
  infested, 
  but 
  much 
  less 
  so 
  than 
  these 
  

   other 
  grains. 
  Adults 
  had 
  already 
  begun 
  to 
  die 
  May 
  5, 
  with 
  evi- 
  

   dences 
  of 
  white 
  muscardine. 
  Green 
  mXiscardine 
  also 
  appeared 
  

   among 
  them 
  early 
  in 
  June, 
  becoming 
  somewhat 
  prevalent 
  by 
  the 
  

   latter 
  part 
  of 
  the 
  month. 
  They 
  continued 
  later 
  here, 
  however, 
  than 
  

   furthc 
  south, 
  some 
  living 
  on 
  until 
  the 
  middle 
  of 
  eJune. 
  As 
  usual, 
  

   the 
  amount 
  of 
  muscardine 
  fell 
  off 
  to 
  insignificance 
  with 
  the 
  disap- 
  

   pearance 
  of 
  this 
  hibernating 
  generation. 
  As 
  the 
  relativeh^ 
  small 
  

   number 
  of 
  bugs 
  maturing 
  at 
  this 
  point 
  disi^ersed 
  themselves 
  after 
  

   harvest, 
  their 
  numbers 
  became 
  so 
  inconspicuous 
  in 
  the 
  fields 
  that 
  

   further 
  observations 
  of 
  value 
  w^ere 
  imj^racticable. 
  

  

  At 
  Urbana 
  a 
  search 
  of 
  winter 
  quarters 
  made 
  the 
  middle 
  of 
  

   March 
  showed 
  that 
  about 
  twenty-iive 
  per 
  cent, 
  of 
  the 
  hil)ernating 
  

   bugs 
  were 
  dead, 
  none 
  of 
  them 
  apparently 
  from 
  any 
  contagious 
  dis- 
  

   ease. 
  They 
  began 
  to 
  leave 
  their 
  hibernating 
  quarters 
  about 
  a 
  month 
  

   later, 
  and 
  by 
  the 
  last 
  week 
  in 
  April 
  were 
  flying 
  in 
  swarms. 
  The 
  first 
  

   eggs 
  were 
  detected 
  April 
  26 
  in 
  the 
  field, 
  and 
  the 
  first 
  young 
  May 
  15. 
  

   Heavy 
  rains 
  the 
  middle 
  of 
  May 
  had 
  no 
  apparent 
  effect 
  upon 
  the 
  old 
  

   bugs 
  except 
  in 
  the 
  development 
  of 
  Sporotri( 
  hum 
  and 
  Entomoph- 
  

   thora, 
  both 
  of 
  which 
  appeared 
  in 
  the 
  fields 
  at 
  this 
  time, 
  the 
  latter 
  

   predominating. 
  Dead 
  young 
  in 
  the 
  field 
  were 
  occasionally 
  o]>served. 
  

   sometimes 
  imbedded 
  in 
  the 
  mud 
  and 
  occasionally 
  with 
  a 
  growth 
  of 
  

   Entomophthora, 
  and 
  the 
  multiplication 
  of 
  the 
  species 
  was 
  evidently 
  

   checked, 
  although 
  no 
  wholesale 
  destruction 
  of 
  either 
  old 
  or 
  young- 
  

   was 
  at 
  any 
  time 
  observed. 
  Similar 
  conditions 
  prevailed 
  throughout 
  

   June, 
  green 
  muscardine 
  continuing 
  common 
  into 
  July. 
  Field 
  ob- 
  

   servations 
  at 
  this 
  point 
  were 
  interrupted 
  by 
  the 
  general 
  dispersal 
  of 
  

   the 
  now 
  mature 
  bugs. 
  

  

  In 
  the 
  wheat 
  district 
  near 
  Mahomet, 
  the 
  wheat 
  fields 
  were 
  very 
  

   much 
  more 
  heavily 
  attacked, 
  and 
  the 
  invasion 
  of 
  corn 
  at 
  wheat 
  

   harvest 
  was 
  very 
  much 
  more 
  manifest. 
  The 
  situation 
  here 
  w^as 
  ren- 
  

   dered 
  peculiarly 
  interesting 
  by 
  a 
  destructive 
  outbreak 
  of 
  green 
  mus- 
  

   cardine 
  in 
  early 
  Jidy 
  and 
  a 
  considerable, 
  although 
  much 
  inferior 
  

   development 
  of 
  white 
  muscardine 
  also. 
  The 
  former 
  disease 
  was 
  so 
  

   prevalent 
  that 
  ninety 
  out 
  of 
  one 
  hundred 
  dead 
  from 
  one 
  of 
  these 
  

   fields 
  gr°w 
  Entomophthora 
  wnthin 
  two 
  days. 
  Indeed, 
  a 
  third 
  of 
  a 
  

   large 
  coUeciion 
  broii^i.t 
  in 
  alive 
  were 
  dead 
  with 
  this 
  disease 
  in 
  a 
  

   day; 
  but 
  as 
  the 
  rains 
  ceased 
  both 
  diseases 
  disappeared 
  in 
  the 
  fields, 
  

   and 
  only 
  small 
  indications 
  of 
  them 
  were 
  obtained 
  in 
  the 
  observation 
  

   boxes. 
  The 
  bacterial 
  decomposition 
  already 
  described 
  became 
  quite 
  

   prevalent 
  in 
  -Inne. 
  After 
  very 
  heavy 
  flooding 
  rains 
  late 
  in 
  July 
  few 
  

  

  