﻿METEOROLOGICAL 
  CONDITIONS 
  AND 
  THE 
  CHINCH-BUG. 
  185 
  

  

  Moisture 
  for 
  whole 
  year, 
  wet. 
  

  

  Moisture 
  for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  very 
  wet. 
  

  

  Temperature 
  for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  slightly 
  cool. 
  

  

  1890. 
  — 
  No 
  bugs. 
  

  

  Two 
  preceding 
  years: 
  Moisture, 
  a 
  slightly 
  wet 
  year 
  and 
  a 
  wet 
  year; 
  temperature 
  

   for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  an 
  average 
  year 
  and 
  a 
  slightly 
  

   cool 
  year. 
  

  

  Preceding 
  winter, 
  warm 
  and 
  dry. 
  

  

  Moisture 
  for 
  whole 
  year, 
  dry. 
  

  

  Moisture 
  for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  very 
  dry. 
  

  

  Temperature 
  for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped 
  ), 
  slightly 
  warm. 
  

  

  1891. 
  — 
  Bugs. 
  

  

  Two 
  preceding 
  years: 
  Moisture, 
  a 
  wet 
  year 
  and 
  a 
  dry 
  year; 
  temperature 
  for 
  April, 
  

   May, 
  June, 
  and 
  July 
  (grouped), 
  a 
  slightly 
  cool 
  year 
  and 
  a 
  slightly 
  warm 
  year. 
  

   Preceding 
  winter, 
  warm 
  and 
  slightly 
  wet. 
  

   Moisture 
  for 
  whole 
  year, 
  wet. 
  

  

  Moisture 
  for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  very 
  wet. 
  

   Temperature 
  for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  average. 
  

  

  From 
  inspection 
  of 
  these 
  data 
  we 
  find, 
  that 
  of 
  the 
  two 
  years 
  preceding 
  the 
  

   first 
  year 
  on 
  my 
  record 
  when 
  bugs 
  appeared 
  (1886), 
  one 
  was, 
  as 
  to 
  moisture, 
  a 
  

   wet 
  year, 
  and 
  the 
  other 
  was 
  a 
  little 
  wetter 
  than 
  the 
  average 
  ; 
  as 
  to 
  temperature 
  

   during 
  the 
  months 
  (April, 
  May, 
  June, 
  and 
  July) 
  when 
  the 
  chinch-bug 
  brood 
  

   of 
  the 
  year 
  is 
  developed, 
  one 
  year 
  had 
  a 
  slightly 
  lower 
  mean 
  than 
  the 
  average, 
  

   and 
  the 
  other 
  was 
  an 
  average 
  year. 
  Of 
  the 
  two 
  years 
  preceding 
  1887, 
  a 
  year 
  

   of 
  bugs, 
  one 
  was 
  slightly 
  wet 
  and 
  of 
  average 
  temperature, 
  and 
  the 
  other 
  was 
  

   dry 
  and 
  of 
  average 
  temperature. 
  Of 
  the 
  two 
  years 
  preceding 
  1888, 
  another 
  

   year 
  of 
  bugs, 
  one 
  was 
  dry 
  and 
  of 
  average 
  temperature, 
  and 
  the 
  other 
  was 
  

   slightly 
  dry 
  and 
  warm. 
  Of 
  the 
  two 
  years 
  preceding 
  1891, 
  a 
  chinch-bug 
  year, 
  

   one 
  was 
  wet 
  and 
  slightly 
  cooler 
  than 
  the 
  average, 
  and 
  the 
  other 
  was 
  dry 
  and 
  

   slightly 
  warmer 
  than 
  the 
  average. 
  

  

  It 
  is 
  apparent, 
  then, 
  that 
  Dr. 
  Thomas's 
  "two-successive-hot-and-dry-years" 
  

   condition 
  for 
  the 
  occurrence 
  of 
  a 
  chinch-bug 
  year 
  is 
  not 
  borne 
  out 
  by 
  the 
  

   Kansas 
  record. 
  Only 
  one 
  year 
  (1888) 
  of 
  the 
  four 
  chinch-bug 
  years 
  would 
  

   come 
  under 
  Dr. 
  Thomas's 
  rule, 
  and 
  in 
  this 
  case 
  the 
  condition 
  is 
  not 
  conspicu- 
  

   ous. 
  Furthermore, 
  1889, 
  which 
  was 
  a 
  year 
  of 
  no 
  bugs, 
  had 
  two 
  preceding 
  

   years 
  fully 
  as 
  favorable 
  as, 
  if 
  not 
  more 
  favorable 
  (according 
  to 
  Dr. 
  Thomas) 
  

   than, 
  the 
  two 
  years 
  preceding 
  1887, 
  a 
  year 
  of 
  bugs. 
  It 
  should 
  be 
  noted 
  that 
  

   1885 
  and 
  1890, 
  years 
  of 
  no 
  bugs, 
  were 
  preceded 
  each 
  by 
  two 
  wet, 
  and, 
  if 
  not 
  

   cold, 
  at 
  least 
  not 
  warm 
  years. 
  The 
  remaining 
  year 
  of 
  our 
  record 
  (1884 
  — 
  no 
  

   bugs) 
  was 
  preceded 
  by 
  a 
  year 
  of 
  average 
  wetness 
  and 
  average 
  temperature, 
  and 
  

   one 
  decidedly 
  wet 
  but 
  of 
  average 
  temperature. 
  There 
  is, 
  therefore, 
  apparently 
  

   no 
  uniformity 
  in 
  the 
  meteorological 
  conditions 
  of 
  the 
  two-year 
  periods 
  preced- 
  

   ing 
  Kansas 
  chinch-bug 
  years. 
  

  

  Considering 
  now 
  the 
  effect 
  of 
  the 
  '^preceding 
  winter 
  " 
  on 
  chinch-bug 
  occur- 
  

   rences, 
  we 
  find, 
  that 
  the 
  bug 
  seasons 
  of 
  1885, 
  a 
  year 
  of 
  no 
  bugs, 
  and 
  of 
  1886 
  

   and 
  1888, 
  years 
  of 
  bugs, 
  were 
  preceded 
  by 
  cold 
  and 
  wet 
  or 
  slightly 
  wet 
  win- 
  

   ters; 
  that 
  the 
  bug 
  seasons 
  of 
  1884 
  (no 
  bugs) 
  and 
  1887 
  (bugs) 
  were 
  preceded 
  

  

  