﻿69 
  

  

  Jultj 
  30. 
  Weather 
  extremely 
  hot 
  and 
  bright; 
  hard 
  rain 
  two 
  days 
  

   iDefore 
  and 
  fields 
  very 
  wot. 
  Rains 
  on 
  six 
  successive 
  days, 
  from 
  the 
  

   18th 
  to 
  the 
  ^J:th, 
  giving 
  total 
  rainfall 
  of 
  5.56 
  inches. 
  On 
  three 
  of 
  

   these 
  days 
  the 
  rain 
  fell 
  in 
  very 
  heavy 
  thunder 
  showers, 
  1.52 
  inches, 
  

   1.65, 
  and 
  1.41, 
  respectively. 
  Chinch-bugs 
  generally 
  extremely 
  scarce, 
  

   averaging 
  not 
  more 
  than 
  one 
  to 
  a 
  corn 
  stalk. 
  No 
  young 
  seen, 
  and 
  

   but 
  very 
  few 
  eggs. 
  Bags 
  long 
  since 
  dead 
  were 
  found 
  between 
  leaves 
  

   and 
  stalks 
  of 
  corn. 
  No 
  Entomophthora, 
  and 
  only 
  an 
  occasional 
  ex- 
  

   ample 
  of 
  Sporotrichum 
  seen. 
  

  

  AiKjitM 
  10. 
  No 
  change 
  of 
  note. 
  Young 
  hatching 
  in 
  very 
  small 
  

   numbers 
  only. 
  Weather 
  very 
  hot 
  and 
  ground 
  thoroughly 
  moist, 
  

   although 
  no 
  rainfall 
  had 
  been 
  reported 
  since 
  July 
  21. 
  

  

  Chdinpalijn 
  Comity, 
  Urhana. 
  — 
  March 
  14, 
  an 
  assistant 
  was 
  sent 
  

   to 
  the 
  fields 
  to 
  search 
  the 
  winter 
  quarters 
  of 
  the 
  chinch-bugs 
  and 
  to 
  

   make 
  extensive 
  collections 
  with 
  a 
  view 
  to 
  determining 
  the 
  condition 
  

   in 
  which 
  they 
  had 
  come 
  through 
  the 
  winter, 
  especially 
  with 
  reference 
  

   to 
  the 
  percentage 
  of 
  survival. 
  Specimens 
  were 
  obtained 
  from 
  orchard 
  

   soil, 
  from 
  timothy 
  and 
  blue 
  grass 
  by 
  the 
  roadside, 
  from 
  grass 
  on 
  

   headlands 
  near 
  a 
  forest 
  plantation, 
  and 
  under 
  boards, 
  logs, 
  bark, 
  etc., 
  

   in 
  the 
  same 
  vicinity. 
  Brought 
  to 
  the 
  laboratory 
  and 
  carefully 
  ex- 
  

   amined, 
  about 
  twenty-five 
  per 
  cent, 
  were 
  dead, 
  none 
  of 
  them 
  exhibit- 
  

   ing 
  any 
  external 
  trace 
  of 
  contagious 
  disease. 
  Indeed 
  the 
  temper- 
  

   ature 
  at 
  the 
  time 
  was 
  much 
  below 
  the 
  minimum 
  for 
  the 
  germination 
  

   and 
  growth 
  of 
  the 
  disease-producing 
  fungi 
  of 
  the 
  chinch-bug, 
  having 
  

   been 
  below 
  the 
  freezing 
  point 
  every 
  day 
  of 
  the 
  month. 
  

  

  March 
  26, 
  numbers 
  of 
  these 
  dead 
  bugs 
  were 
  placed 
  on 
  moist 
  sand 
  

   in 
  Petri 
  dishes 
  for 
  the 
  purpose 
  of 
  ascertaining 
  whether 
  any 
  of 
  them 
  

   might 
  have 
  died 
  of 
  fungous 
  disease, 
  notwithstanding 
  the 
  absence 
  of 
  

   external 
  parasitic 
  growths. 
  Three 
  such 
  lots 
  so 
  treated 
  gave 
  no 
  growth 
  

   -of 
  fungus 
  parasite. 
  

  

  Chinch-bugs 
  were 
  first 
  seen 
  on 
  the 
  wing 
  at 
  Champaign 
  April 
  16, 
  

   l)ut 
  almost 
  daily 
  thereafter 
  until 
  April 
  27, 
  swarming 
  abundantly 
  from 
  

   the 
  24:th 
  to 
  the 
  27th. 
  There 
  was 
  no 
  change 
  of 
  weather 
  recorded 
  at 
  

   this 
  time, 
  the 
  temperature 
  being 
  about 
  the 
  same 
  as 
  at 
  the 
  middle 
  of 
  

   the 
  mouth, 
  and 
  no 
  rainfall 
  occurring 
  except 
  .14 
  of 
  an 
  inch 
  on 
  the 
  23d 
  

   and 
  a 
  mere 
  trace 
  on 
  the 
  26th. 
  They 
  were 
  found 
  quite 
  abundantly 
  

   on 
  the 
  wheat 
  on 
  the 
  Experiment 
  Station 
  farm 
  April 
  18, 
  and 
  were 
  no- 
  

   ticed 
  pairing 
  there 
  on 
  April 
  24. 
  The 
  first 
  eggs 
  in 
  the 
  field 
  were 
  de- 
  

   tected 
  April 
  26. 
  By 
  May 
  5 
  the 
  e^^'i 
  had 
  become 
  very 
  abundant, 
  and 
  

   the 
  bags 
  were 
  pairing 
  in 
  great 
  numbers 
  in 
  this 
  wheat, 
  but 
  no 
  young 
  

   were 
  detected. 
  The 
  first 
  young 
  chinch-bug 
  was 
  seen 
  in 
  the 
  field 
  

   May 
  15, 
  at 
  which 
  time 
  large 
  numbers 
  of 
  eggs 
  were 
  evidently 
  about 
  

   to 
  hatch. 
  Two 
  more 
  young 
  were 
  found 
  on 
  the 
  17th 
  in 
  the 
  same 
  field 
  

   of 
  wheat, 
  and 
  still 
  a 
  few 
  more 
  on 
  the 
  following 
  day. 
  Heavy 
  rains 
  

   occurring 
  on 
  the 
  l')th. 
  17th, 
  18tli, 
  and 
  U)th 
  (2.22 
  in.) 
  had 
  no 
  apparent 
  

   effect 
  upon 
  the 
  old 
  bugs, 
  but 
  notes 
  on 
  the 
  20th 
  and 
  21st 
  show 
  that 
  

   tlie 
  young 
  were 
  not 
  appearing 
  as 
  rapidly 
  as 
  might 
  have 
  been 
  ex- 
  

   pected, 
  some 
  washing 
  away 
  and 
  burying 
  of 
  newly 
  hatched 
  young 
  by 
  

   these 
  successive 
  rains 
  is 
  consequently 
  probable. 
  Both 
  Sporotrichum 
  

   ^nd 
  Entomophthora 
  had 
  appeared 
  by 
  this 
  time 
  in 
  the 
  field, 
  the 
  first 
  

  

  