﻿INTRODlXm)RY 
  NOTE. 
  

  

  The 
  following 
  report 
  presents 
  the 
  result* 
  of 
  a 
  part 
  of 
  the 
  work 
  done 
  

   by 
  myself 
  and 
  my 
  assistants 
  during 
  the 
  years 
  1895 
  and 
  1896, 
  with 
  

   the 
  exception 
  of 
  the 
  first 
  paper, 
  which 
  has 
  been 
  revised 
  to 
  include 
  

   material 
  ol)tained 
  to 
  October 
  15, 
  1897. 
  

  

  The 
  work 
  of 
  the 
  office 
  has 
  been 
  determined 
  largely 
  by 
  the 
  leading 
  

   entomological 
  conditions 
  of 
  the 
  biennial 
  period. 
  The 
  most 
  notable 
  

   features 
  of 
  the 
  situation 
  have 
  been 
  the 
  extension 
  of, 
  an 
  outbreak 
  of 
  

   the 
  chinch-bug 
  northward, 
  quite 
  beyond 
  the 
  usual 
  limits 
  of 
  serious 
  

   ravage 
  by 
  that 
  insect: 
  the 
  substantial 
  disaj^pearance 
  or 
  considerable 
  

   diminution 
  of 
  chinch-bug 
  attack 
  over 
  a 
  large 
  j^jart 
  of 
  Southern 
  Illi- 
  

   nois 
  previously 
  heavily 
  infested; 
  the 
  discovery 
  of 
  the 
  San 
  Jose 
  scale 
  

   in 
  various 
  parts 
  of 
  the 
  State 
  in 
  1896, 
  anji 
  a 
  minor 
  outbreak 
  of 
  the 
  

   arm 
  3^ 
  worm 
  early 
  in 
  that 
  year 
  throughout 
  a 
  large 
  part 
  of 
  Central 
  Illi- 
  

   nois. 
  A 
  local 
  phenomenon 
  of 
  special 
  interest 
  was 
  the 
  occurrence 
  in 
  

   a 
  part 
  of 
  Christian 
  county 
  and 
  adjoining 
  counties 
  of 
  extensive 
  and 
  

   extraordinary 
  injury 
  by 
  white 
  grubs. 
  Articles 
  on 
  all 
  these 
  topics 
  are 
  

   included 
  in 
  this 
  report. 
  

  

  The 
  organization 
  of 
  my 
  office 
  staff 
  during 
  this 
  time 
  has 
  not 
  dif- 
  

   fered 
  essentially 
  from 
  that 
  of 
  previous 
  years, 
  the 
  association 
  of 
  the 
  

   Entomologist's 
  office 
  with 
  the 
  State 
  Laboratory 
  of 
  Natural 
  History 
  

   under 
  one 
  management 
  continuing, 
  as 
  before, 
  under 
  conditions 
  such 
  

   that 
  the 
  assistants 
  of 
  that 
  Laboratory 
  have 
  been 
  available, 
  as 
  needed, 
  

   for 
  entomological 
  work. 
  Acknowledgments 
  are 
  due 
  especially 
  to 
  the 
  

   following 
  assistants 
  and 
  others 
  for 
  services 
  in 
  connection 
  with 
  the 
  

   work 
  here 
  reported: 
  To 
  Mr. 
  C. 
  A. 
  Hart, 
  many 
  years 
  Systematic 
  En- 
  

   tomologist 
  of 
  the 
  Laboratory, 
  for 
  entomological 
  determinations 
  and 
  a 
  

   variety 
  of 
  indispensable 
  miscellaneous 
  services; 
  to 
  Miss 
  Lydia 
  M. 
  

   Hart, 
  Artist 
  of 
  the 
  Laboratory, 
  for 
  most 
  of 
  the 
  drawings 
  used 
  in 
  il- 
  

   lustration 
  of 
  the 
  report; 
  to 
  Messrs. 
  W. 
  G. 
  Johnson, 
  W. 
  A. 
  Snow, 
  C. 
  

   C. 
  Adams 
  and 
  H. 
  O. 
  Woodworth 
  for 
  field 
  and 
  laboratory 
  observations 
  

   and 
  experiments; 
  to 
  J. 
  C. 
  Blair, 
  of 
  the 
  Horticultural 
  Department 
  of 
  

   the 
  L^niversity, 
  to 
  R. 
  W. 
  Braucher, 
  to 
  Prof. 
  H. 
  E. 
  Summers 
  and 
  to 
  

   Ernest 
  B. 
  Forbes 
  for 
  field 
  work 
  on 
  the 
  San 
  Jose 
  scale: 
  and 
  to 
  Mr. 
  B. 
  

   M. 
  Duggar, 
  especially 
  engaged 
  during 
  the 
  year 
  ending 
  June 
  30, 
  1896, 
  

   for 
  a 
  study 
  of 
  the 
  contagious 
  diseases 
  of 
  insects. 
  Especial 
  mention 
  

   should 
  be 
  made, 
  in 
  addition 
  to 
  the 
  various 
  references 
  in 
  the 
  body 
  of 
  

   the 
  report, 
  to 
  the 
  services 
  of 
  Mr. 
  Johnson 
  in 
  conducting 
  most 
  of 
  the 
  

   experiments 
  described 
  in 
  my 
  article 
  on 
  "Miscellaneous 
  Experiments 
  

   with 
  Chinch-bugs."' 
  

   — 
  b. 
  E 
  ■ 
  

  

  