﻿Introduction. 
  

  

  This 
  report 
  is 
  intended 
  to 
  present 
  primarily 
  the 
  results 
  of 
  my 
  experiments 
  

   and 
  practical 
  work 
  in 
  artificially 
  disseminating 
  contagious 
  diseases 
  among 
  

   chinch-bugs 
  during 
  1891. 
  I 
  have, 
  however, 
  for 
  the 
  better 
  understanding 
  of 
  

   these 
  experiments, 
  added 
  summary 
  accounts 
  of 
  my 
  observations 
  and 
  experi- 
  

   ments 
  of 
  1888, 
  1889, 
  and 
  1890; 
  also, 
  a 
  "History 
  of 
  Microphytous 
  Diseases 
  of 
  

   the 
  Chinch-Bug 
  in 
  the 
  United 
  States," 
  and 
  a 
  bibliographical 
  record 
  of 
  my 
  

   own 
  contributions 
  to 
  the 
  literature 
  of 
  the 
  subject. 
  

  

  In 
  the 
  record 
  of 
  the 
  work 
  in 
  1891, 
  I 
  have 
  presented 
  an 
  account 
  of 
  the 
  ex- 
  

   periments 
  and 
  observations 
  in 
  the 
  laboratory, 
  and 
  have 
  given 
  place 
  to 
  a 
  full 
  

   account 
  of 
  the 
  experiments 
  in 
  the 
  field, 
  including 
  a 
  complete 
  list 
  of 
  farmers 
  

   who 
  have 
  reported 
  the 
  results 
  of 
  their 
  experiments, 
  together 
  with 
  their 
  esti- 
  

   mates 
  of 
  amount 
  of 
  grain 
  saved; 
  including 
  also 
  the 
  report 
  of 
  my 
  field 
  agent, 
  

   and 
  reports 
  from 
  the 
  farmers 
  themselves, 
  covering 
  more 
  or 
  less 
  satisfactorily 
  

   the 
  points 
  necessary 
  to 
  be 
  considered 
  in 
  the 
  field 
  experiments. 
  The 
  map 
  ac- 
  

   companying 
  this 
  report 
  of 
  field 
  work 
  graphically 
  presents 
  the 
  matter 
  of 
  the 
  

   distribution 
  of 
  the 
  field 
  experiments 
  in 
  Kansas 
  in 
  1891. 
  

  

  I 
  have 
  also 
  devoted 
  a 
  considerable 
  space 
  to 
  a 
  discussion 
  of 
  the 
  influence 
  of 
  

   meteorological 
  conditions 
  on 
  the 
  chinch-bug. 
  The 
  data 
  presented 
  in 
  this 
  dis- 
  

   cussion 
  will 
  not 
  be 
  without 
  interest 
  to 
  both 
  farmers 
  and 
  entomologists. 
  

  

  The 
  very 
  considerable 
  space 
  given 
  to 
  the 
  "History 
  of 
  Microphytous 
  Dis- 
  

   eases 
  of 
  the 
  Chinch-Bug 
  in 
  the 
  United 
  States" 
  is 
  warranted, 
  to 
  my 
  mind, 
  by 
  

   the 
  lack 
  of 
  any 
  available 
  collaboration 
  or 
  summing 
  up 
  of 
  existing 
  data 
  in 
  the 
  

   matter. 
  In 
  the 
  compiling 
  of 
  this 
  chapter, 
  I 
  have 
  believed 
  that 
  liberal 
  quo- 
  

   tations 
  from 
  the 
  original 
  references 
  would 
  be 
  of 
  more 
  value 
  than 
  any 
  at- 
  

   tempted 
  interpretation 
  of 
  the 
  work 
  of 
  various 
  investigators. 
  I 
  have 
  made 
  

   free 
  use 
  of 
  Professor 
  Forbes's 
  admirable 
  bibliographical 
  record 
  of 
  the 
  chinch- 
  

   bug, 
  presented 
  in 
  the 
  Sixteenth 
  Report 
  of 
  the 
  State 
  Entomologist 
  of 
  Illinois. 
  

   I 
  would 
  acknowledge 
  the 
  constant 
  assistance 
  which 
  I 
  have 
  had 
  in 
  all 
  my 
  work, 
  

   as 
  well 
  as 
  in 
  the 
  making 
  up 
  of 
  this 
  report, 
  from 
  Professor 
  Forbes's 
  valuable 
  

   published 
  contributions 
  to 
  the 
  discussion 
  of 
  chinch-bug 
  diseases. 
  

  

  I 
  also 
  wish 
  to 
  acknowledge 
  the 
  invaluable 
  aid 
  continually 
  rendered, 
  during 
  

   the 
  progress 
  of 
  my 
  experiments 
  and 
  in 
  the 
  preparation 
  of 
  this 
  report, 
  by 
  my 
  

   regular 
  assistants 
  in 
  botany 
  and 
  entomology 
  — 
  Messrs. 
  W. 
  C. 
  Stevens 
  and 
  V. 
  

   L. 
  Kellogg. 
  

  

  As 
  an 
  appendix, 
  I 
  present 
  a 
  detailed 
  statement 
  of 
  the 
  expenditure 
  of 
  funds 
  

  

  (5) 
  

  

  