﻿9(0 
  

  

  shelter 
  in 
  the 
  field. 
  This 
  little 
  appearance 
  of 
  muscardine 
  was 
  tem- 
  

   porary, 
  however, 
  and 
  after 
  a 
  few 
  more 
  days 
  of 
  dry 
  weather, 
  on 
  July 
  5 
  

   only 
  a 
  single 
  specimen 
  could 
  be 
  found 
  after 
  a 
  half 
  hour's 
  careful 
  search. 
  

   Even 
  after 
  a 
  half 
  inch 
  of 
  rain 
  (July 
  7 
  and 
  8) 
  less 
  than 
  a 
  dozen 
  

   chinch-bugs 
  covered 
  with 
  the 
  muscardine 
  fungus 
  were 
  found 
  by 
  a 
  

   search 
  of 
  about 
  an 
  hour 
  on 
  the 
  ground 
  under 
  fallen 
  grain 
  or 
  rubbish 
  

   which 
  had 
  kept 
  the 
  surface 
  somewhat 
  moist. 
  

  

  The 
  bugs 
  in 
  the 
  oats 
  were 
  again 
  exposed 
  July 
  9 
  to 
  muscardine 
  in- 
  

   fection, 
  half 
  the 
  contents 
  of 
  a 
  largo 
  contagion 
  box 
  being 
  scattered 
  

   among 
  them. 
  July 
  12 
  the 
  other 
  half, 
  containing 
  several 
  hundred 
  

   victims 
  of 
  muscardine, 
  was 
  similarly 
  distributed 
  where 
  the 
  bugs 
  were 
  

   most 
  abundant 
  in 
  the 
  oats 
  field 
  nearest 
  the 
  wheat 
  stubble, 
  No 
  dead 
  

   bugs 
  or 
  traces 
  of 
  fungus 
  were 
  found 
  in 
  the 
  field 
  until 
  July 
  17, 
  two 
  

   days 
  after 
  the 
  fall 
  of 
  two 
  thirds 
  of 
  an 
  inch 
  of 
  rain. 
  At 
  this 
  time 
  

   two 
  bugs 
  dead 
  and 
  covered 
  with 
  Sporotrichum 
  were 
  observed 
  under 
  

   rubbish 
  on 
  the 
  surface 
  of 
  the 
  ground 
  where 
  it 
  was 
  very 
  wet. 
  From 
  

   this 
  until 
  the 
  20th, 
  when 
  the 
  next 
  search 
  was 
  made, 
  rain 
  fell 
  each 
  

   day, 
  an 
  inch 
  and 
  three 
  quarters 
  in 
  all, 
  but 
  only 
  half 
  a 
  dozen 
  dead 
  

   bugs 
  covered 
  with 
  muscardine 
  fungus 
  were 
  found 
  even 
  then. 
  The 
  

   remainder 
  of 
  the 
  month 
  was 
  rather 
  dry, 
  except 
  for 
  a 
  single 
  shower 
  

   on 
  the 
  27th, 
  when 
  about 
  three 
  quarters 
  of 
  an 
  inch 
  of 
  rain 
  fell. 
  Oc- 
  

   casionally 
  fungas-covered 
  bugs 
  were 
  seen, 
  but 
  in 
  numbers 
  much 
  too 
  

   small 
  to 
  liave 
  the 
  slightest 
  appreciable 
  effect 
  upon 
  the 
  horde 
  on 
  these 
  

   premises. 
  

  

  August 
  was 
  extremely 
  dry 
  and 
  very 
  warm, 
  no 
  rain 
  falling 
  until 
  the 
  

   26th 
  of 
  the 
  month, 
  and 
  the 
  maximum 
  temperature 
  ranging 
  in 
  the 
  

   meantime 
  as 
  high 
  as 
  96° 
  and 
  97°. 
  Fifteen 
  days 
  of 
  these 
  first 
  twent)^- 
  

   five 
  give 
  a 
  record 
  of 
  90° 
  or 
  more. 
  During 
  this 
  period 
  of 
  drouth 
  no 
  

   trace 
  of 
  the 
  fungus 
  was 
  detected 
  after 
  careful 
  and 
  protracted 
  search 
  

   of 
  the 
  experimental 
  fields 
  on 
  August 
  2 
  and 
  15. 
  Its 
  presence 
  in 
  a 
  

   latent 
  condition 
  among 
  these 
  chinch-bugs 
  was, 
  however, 
  shown 
  by 
  an 
  

   office 
  experiment. 
  August 
  3, 
  15, 
  and 
  21, 
  lots 
  of 
  adult 
  bugs 
  brought 
  

   in 
  from 
  this 
  field 
  and 
  kept 
  enclosed 
  with 
  damp 
  earth 
  and 
  food 
  

   yielded 
  each 
  within 
  a 
  few 
  days 
  from 
  two 
  to 
  several 
  dead 
  bugs, 
  which 
  

   became 
  covered 
  with 
  a 
  profuse 
  growth 
  of 
  Sporotrichum 
  globuliferiim. 
  

   Nearly 
  three 
  inches 
  of 
  rain 
  fell 
  during 
  the 
  latter 
  days 
  of 
  August, 
  

   after 
  which 
  a 
  small 
  number 
  of 
  young 
  bugs 
  were 
  found 
  dead 
  in 
  the 
  

   field 
  enveloped 
  witli 
  a 
  profuse 
  growth 
  of 
  Sporotrichum 
  globuliferum. 
  

   More 
  than 
  three 
  inches 
  of 
  rain 
  fell 
  September 
  3 
  and 
  4, 
  and 
  an 
  inch 
  

   and 
  a 
  half 
  on 
  the 
  16th 
  of 
  that 
  month. 
  The 
  weather 
  in 
  the 
  mean- 
  

   time 
  was 
  only 
  moderately 
  hot. 
  reaching 
  a 
  temperature 
  of 
  90° 
  on 
  only 
  

   three 
  days 
  of 
  the 
  sixteen. 
  

  

  September 
  4 
  a 
  special 
  effort 
  was 
  made 
  to 
  take 
  advantage 
  of 
  the 
  

   recent 
  heavy 
  rains 
  by 
  introducing 
  muscardine 
  fungus 
  at 
  a 
  selected 
  

   point 
  in 
  the 
  corn 
  where 
  chinch-bugs 
  were 
  very 
  numerous 
  and 
  where 
  

   the 
  ground 
  was 
  moist. 
  Corn 
  was 
  prostrate 
  at 
  the 
  time, 
  blown 
  down 
  

   by 
  the 
  recent 
  storm, 
  and 
  the 
  stalks 
  of 
  several 
  of 
  these 
  fallen 
  hills 
  

   were 
  brought 
  together 
  to 
  form 
  a 
  thick 
  covering 
  over 
  the 
  wet 
  surface 
  

   of 
  the 
  earth. 
  Thoroughly 
  ripened 
  spores 
  from 
  an 
  agar 
  culture 
  of 
  

   Sporotrichum 
  globuliferum, 
  but 
  one 
  remove 
  from 
  the 
  insect, 
  were 
  

  

  