﻿184 
  CONTAGIOUS 
  DISEASES 
  OF 
  THE 
  CHINCH-BUG. 
  

  

  APPLICATION 
  OF 
  THE 
  PRECEDING 
  WEATHER 
  TABLES. 
  

  

  From 
  the 
  foregoing 
  tables 
  data 
  are 
  available 
  bearing 
  on 
  Dr. 
  Thomas's 
  state- 
  

   ment, 
  that 
  two 
  successive 
  dry, 
  hot 
  years 
  are 
  necessary 
  for 
  a 
  serious 
  chinch-bug 
  

   outbreak; 
  and 
  on 
  Dr. 
  Riley's 
  statement, 
  that 
  heavy 
  rains, 
  wet 
  seasons 
  and 
  

   moist, 
  open 
  winters 
  are 
  prejudicial 
  to 
  the 
  bugs; 
  and 
  on 
  the 
  generally-accepted 
  

   notion, 
  that 
  wet 
  weather 
  is 
  immediately 
  destructive 
  to 
  the 
  bugs, 
  and 
  that 
  hot, 
  

   dry 
  weather 
  is 
  necessary 
  for 
  their 
  successful 
  development. 
  These 
  data 
  may 
  

   be 
  conveniently 
  presented 
  as 
  follows 
  : 
  

  

  1884. 
  — 
  No 
  bugs. 
  

  

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

   for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  two 
  average 
  years 
  (slightly 
  cool). 
  

   Preceding 
  winter, 
  a 
  little 
  cold 
  and 
  a 
  little 
  dry. 
  

   Moisture 
  for 
  whole 
  year, 
  wet. 
  

  

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

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

  

  1885. 
  — 
  No 
  bugs. 
  

  

  Two 
  preceding 
  years: 
  Moisture, 
  two 
  wet 
  years; 
  temperature 
  for 
  April, 
  May, 
  June, 
  

  

  and 
  July 
  (grouped), 
  two 
  average 
  years 
  (slightly 
  cool). 
  

   Preceding 
  winter, 
  cold 
  and 
  wet. 
  

   Moisture 
  for 
  whole 
  year, 
  a 
  little 
  wet. 
  

  

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

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

  

  1886. 
  — 
  Bugs. 
  

  

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

   for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  a 
  slightly 
  cool 
  year 
  and 
  an 
  aver- 
  

   age 
  year. 
  

  

  Preceding 
  winter, 
  cold 
  and 
  slightly 
  wet., 
  

  

  Moisture 
  for 
  whole 
  year, 
  dry. 
  

  

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

  

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

  

  1887. 
  — 
  Bugs. 
  

  

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

  

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

   Preceding 
  winter, 
  cold 
  and 
  dry. 
  

   Moisture 
  for 
  whole 
  year, 
  slightly 
  dry. 
  

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

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

  

  1888. 
  — 
  Bugs. 
  

  

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

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

   Preceding 
  winter, 
  cold 
  and 
  slightly 
  wet. 
  

   Moisture 
  for 
  whole 
  year, 
  slightly 
  wet. 
  

  

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

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

  

  1889. 
  — 
  No 
  bugs. 
  

  

  Two 
  preceding 
  years: 
  Moisture, 
  a 
  slightly 
  dry 
  year 
  and 
  a 
  slightly 
  wet 
  year; 
  tem- 
  

   perature 
  for 
  April, 
  May, 
  June, 
  and 
  July 
  (grouped), 
  a 
  warm 
  year 
  and 
  an 
  av- 
  

   erage 
  year. 
  

  

  Preceding 
  winter, 
  wet 
  and 
  slightly 
  warm. 
  

  

  