﻿in 
  a 
  wheat 
  tield 
  May 
  15, 
  where 
  the 
  urouml 
  was 
  ratlier 
  wet, 
  and 
  the 
  

   Recond 
  May 
  19 
  in 
  the 
  same 
  field. 
  Eiitomophthora 
  was 
  observed 
  ai^^ain 
  

   on 
  the 
  20th 
  and 
  22d 
  and 
  Sporotrichum 
  on 
  the 
  22d. 
  Tiie 
  Entomoph- 
  

   thora 
  became 
  rapidly 
  more 
  abundant 
  on 
  okl 
  bugs, 
  but 
  neither 
  this 
  

   nor 
  the 
  Sporotrichum 
  were 
  seen 
  on 
  young. 
  Dead 
  sj)ecimens 
  with 
  En- 
  

   tomophthora 
  were 
  not 
  uncommon 
  on 
  the 
  ground, 
  on 
  leaves 
  and 
  stems 
  

   of 
  wheat, 
  oats, 
  and 
  grass, 
  on 
  weeds, 
  and 
  under 
  rubbish* 
  Several 
  

   pairs 
  were 
  seen 
  in 
  copula, 
  both 
  dead 
  with 
  this 
  infection. 
  This 
  con- 
  

   dition 
  of 
  things 
  continued 
  for 
  several 
  days, 
  the 
  weather 
  meantime 
  re- 
  

   maining 
  wet. 
  May 
  27 
  a 
  few 
  dead 
  young 
  were 
  found 
  on 
  low, 
  damp 
  

   places, 
  many 
  of 
  them 
  more 
  or 
  less 
  buried 
  in 
  the 
  mud. 
  A 
  good 
  many 
  

   old 
  bugs 
  dead 
  with 
  Entomophthora 
  and 
  a 
  few 
  with 
  Sporotrichum 
  

   June 
  1. 
  Young 
  were 
  also 
  observed 
  on 
  the 
  surface 
  of 
  the 
  ground 
  

   dead 
  with 
  Entomophthora 
  aphidis. 
  Conditions 
  continued 
  about 
  as 
  

   a.bove, 
  the 
  young 
  not 
  increasing 
  very 
  rapidly 
  in 
  number, 
  and 
  heavy 
  

   rains 
  continuing. 
  The 
  observer's 
  notes 
  mention 
  from 
  time 
  to 
  time 
  

   to 
  June 
  15 
  the 
  occurrence 
  of 
  a 
  few 
  dead 
  young 
  in 
  the 
  field, 
  but 
  there 
  

   was 
  at 
  no 
  time 
  any 
  visible 
  wholesale 
  destruction 
  of 
  either 
  old 
  or 
  

   young 
  on 
  these 
  premises. 
  Heavy 
  rains 
  had 
  fallen 
  May 
  21 
  (LIS 
  

   inches). 
  May 
  JiO 
  (.5-') 
  inches), 
  and 
  June 
  8 
  ( 
  1.78 
  inches), 
  together 
  with 
  

   several 
  lighter 
  rains. 
  

  

  June 
  18. 
  There 
  were 
  now 
  but 
  very 
  few 
  bugs 
  in 
  oats 
  on 
  the 
  Experi- 
  

   ment 
  Station 
  farm, 
  but 
  they 
  had 
  been 
  sufficiently 
  abundant 
  in 
  the 
  wheat 
  

   to 
  have 
  made 
  their 
  way 
  into 
  corn 
  adjacent 
  a 
  distance 
  of 
  six 
  or 
  seven 
  

   rows 
  to 
  the 
  number 
  of 
  about 
  half 
  a 
  teacupful 
  to 
  each 
  stalk 
  of 
  corn. 
  

  

  After 
  a 
  heavy 
  rain 
  on 
  the 
  20th 
  (.(J4inch) 
  a 
  few 
  were 
  found 
  im- 
  

   bedded 
  in 
  mud 
  in 
  a 
  roadside 
  ditch, 
  but 
  otherwise 
  little 
  effect 
  was 
  dis- 
  

   coverable. 
  A 
  number 
  brought 
  in 
  from 
  the 
  field 
  at 
  this 
  time 
  were 
  

   placed 
  under 
  the 
  usual 
  conditions 
  resorted 
  to 
  for 
  an 
  experimental 
  de- 
  

   termination 
  of 
  the 
  cause 
  of 
  death. 
  Six 
  specimens 
  dying 
  June 
  27 
  

   were 
  placed 
  on 
  moist 
  sand, 
  and 
  fluly 
  2 
  one 
  was 
  imbedded 
  in 
  a 
  pro- 
  

   fuse 
  growth 
  of 
  Sporotrichum. 
  Forty 
  specimens 
  dead 
  June 
  29 
  gave 
  

   no 
  evidence 
  of 
  muscardine 
  by 
  July 
  2. 
  Of 
  fifty 
  dead 
  June 
  -^0, 
  ten 
  ex- 
  

   hibited 
  Entomof)hthora 
  July 
  2. 
  

  

  From 
  another 
  collection 
  made 
  in 
  the 
  same 
  fields 
  June 
  29. 
  eleven 
  

   dead 
  were 
  kept 
  on 
  moist 
  sand 
  in 
  a 
  Petri 
  dish, 
  and 
  several 
  exhibited 
  

   Entomophthora 
  by 
  the 
  2d 
  of 
  July. 
  Of 
  fourteen 
  others 
  similarly 
  

   transferred 
  July 
  1. 
  eight 
  had 
  grown 
  Entomophthora 
  by 
  the 
  following 
  

   day. 
  

  

  On 
  the 
  (Uh 
  of 
  July 
  the 
  chincli-bugs, 
  whose 
  development 
  had 
  been 
  

   followed 
  since 
  the 
  middle 
  of 
  April, 
  were 
  generally 
  .scattered 
  through 
  

   the 
  corn, 
  now 
  averaging 
  over 
  twenty-five 
  or 
  thirty 
  to 
  a 
  stalk. 
  An 
  

   occasional 
  dead 
  specimen 
  was 
  to 
  be 
  found 
  in 
  the 
  field, 
  sometimes 
  coveretl 
  

   with 
  Sporotrichum 
  and 
  sometimes 
  with 
  Entomophthora. 
  The 
  num- 
  

   ber 
  remaining 
  was 
  so 
  small, 
  and 
  they 
  were 
  so 
  widely 
  dispersed, 
  that 
  

   our 
  midsumuier 
  observations 
  were 
  transferred 
  to 
  a 
  much 
  more 
  

   heavily 
  infested 
  field 
  observed 
  near 
  Mahomet. 
  Illinois, 
  intln' 
  western 
  

   part 
  of 
  Champaign 
  county. 
  

  

  'Entomophthora 
  had 
  appearod 
  in 
  considerable 
  -luantity 
  in 
  these 
  same 
  fields 
  in 
  Septem- 
  

   ber 
  of 
  the 
  preceding 
  year. 
  

  

  