﻿PREFACE. 
  XVII 
  

  

  eminent 
  may 
  pursue 
  in 
  the 
  future 
  toward 
  ameliorating 
  the 
  locust 
  evil. 
  

   With 
  the 
  assistance 
  of 
  a 
  large 
  map 
  (Map 
  I) 
  in 
  six 
  sections, 
  so 
  arranged 
  

   that 
  they 
  may 
  be 
  put 
  together 
  on 
  canvass 
  or 
  cloth 
  and 
  hung 
  up 
  in 
  

   school-rooms 
  or 
  other 
  public 
  buildings, 
  the 
  surface 
  characteristics 
  of 
  

   plains, 
  mountains, 
  plateaus, 
  and 
  basins 
  are 
  considered, 
  especially 
  from 
  

   the 
  point 
  of 
  view 
  of 
  the 
  relative 
  areas 
  in 
  which 
  the 
  vegetation 
  is 
  sus- 
  

   ceptible 
  of 
  being 
  burned 
  over. 
  No 
  one 
  particular 
  course 
  is 
  recommended 
  

   or 
  deemed 
  sufficient, 
  but 
  it 
  is 
  shown 
  that 
  good 
  results 
  will 
  flow 
  from 
  in- 
  

   creased 
  settlement 
  of 
  the 
  Territories, 
  the 
  building 
  of 
  railroads, 
  increased 
  

   irrigation, 
  the 
  preservation 
  of 
  the 
  timber, 
  judicious 
  burning, 
  the 
  perfec- 
  

   tion 
  of 
  a 
  system 
  of 
  observations 
  and 
  warnings, 
  and 
  co-operation 
  with 
  

   the 
  Dominion 
  Government 
  in 
  these 
  various 
  measures. 
  

  

  In 
  Appendix 
  I 
  will 
  be 
  found 
  some 
  further 
  data 
  and 
  replies 
  to 
  our 
  

   first 
  circular. 
  In 
  Appendix 
  II 
  Mr. 
  S. 
  H. 
  Scudder 
  gives 
  a 
  list 
  of 
  the 
  

   Orthoptera 
  collected 
  by 
  Mr. 
  Packard 
  in 
  his 
  western 
  trip 
  made 
  in 
  1877, 
  

   and 
  describes 
  some 
  new 
  species. 
  The 
  list 
  is 
  interesting, 
  as 
  showing 
  

   the 
  number 
  of 
  forms 
  closely 
  allied 
  to 
  spretus, 
  but 
  with 
  shorter 
  wings, 
  

   occurring 
  in 
  Washington 
  Territory 
  and 
  Oregon. 
  The 
  report 
  of 
  Mr. 
  

   John 
  Marten 
  (Appendix 
  III) 
  of 
  observations 
  made 
  the 
  present 
  year 
  

   in 
  Iowa, 
  Dakota, 
  Minnesota, 
  and 
  Nebraska 
  under 
  Mr. 
  Thomas's 
  direc- 
  

   tion, 
  gives 
  a 
  detailed 
  statement 
  of 
  the 
  locust 
  conditions 
  in 
  those 
  States. 
  

   In 
  Appendix 
  IV 
  a 
  very 
  full 
  exposition 
  of 
  locust 
  literature 
  is 
  given 
  by 
  

   Mr. 
  B. 
  P. 
  Mann, 
  supplemented 
  by 
  Mr. 
  Thomas 
  ; 
  while 
  in 
  Appendices 
  V 
  

   and 
  VI 
  additional 
  data 
  regarding 
  the 
  locust 
  in 
  Texas 
  and 
  regarding 
  

   flights 
  are 
  brought 
  together. 
  In 
  Appendix 
  VII 
  Mr. 
  Packard 
  gives 
  

   some 
  notes 
  of 
  his 
  journey 
  in 
  1878, 
  and 
  in 
  Appendix 
  VIII 
  an 
  account 
  of 
  

   Yersin's 
  researches 
  on 
  the 
  functions 
  of 
  the 
  nervous 
  system 
  of 
  articulates, 
  

   as 
  supplementary 
  to 
  Chapter 
  XI 
  on 
  the 
  brain 
  of 
  the 
  locust. 
  

  

  The 
  delay 
  in 
  printing 
  the 
  report 
  which 
  was 
  not 
  ordered 
  printed 
  by 
  

   Congress 
  till 
  April, 
  1880, 
  is 
  to 
  be 
  regretted, 
  but 
  has 
  permitted 
  the 
  in- 
  

   cluding 
  of 
  some 
  facts 
  ascertained 
  since 
  it 
  was 
  submitted. 
  

  

  The 
  commissioners 
  take 
  pleasure 
  in 
  here 
  thanking 
  the 
  numerous 
  cor- 
  

   respondents 
  who 
  have 
  replied 
  to 
  the 
  circulars 
  issued, 
  and 
  the 
  managers 
  

   of 
  the 
  following 
  railroads 
  for 
  favors 
  over 
  their 
  respective 
  lines 
  : 
  

  

  Lake 
  Shore 
  and 
  Michigan 
  Southern 
  ; 
  Chicago, 
  Bock 
  Island 
  and 
  Pacific 
  ; 
  

   Chicago, 
  Milwaukee 
  and 
  Saint 
  Paul; 
  Western 
  Union 
  •, 
  Northern 
  Pacific 
  ; 
  

   Saint 
  Paul 
  and 
  Sioux 
  City 
  ; 
  First 
  Division 
  Saint 
  Paul 
  and 
  Pacific 
  ; 
  Saint 
  

   Paul 
  and 
  Pacific 
  ; 
  Sioux 
  City 
  and 
  Pacific 
  ; 
  Chicago 
  and 
  Northwestern 
  ; 
  

   Des 
  Moines 
  and 
  Fort 
  Dodge 
  ; 
  Chicago, 
  Burlington 
  and 
  Quincy 
  ; 
  Central 
  

   Railroad 
  of 
  Iowa 
  ; 
  Kansas 
  Pacific 
  ; 
  Saint 
  Joseph 
  and 
  Denver 
  ; 
  Missouri, 
  

   Kansas 
  aud 
  Texas 
  ; 
  Atchison, 
  Topeka 
  and 
  Santa 
  F6j 
  Burlington 
  and 
  

   Missouri 
  River, 
  in 
  Nebraska; 
  Denver 
  and 
  Rio 
  Grande; 
  Texas 
  and 
  

   Pacific; 
  International 
  and 
  Great 
  Northern; 
  Illinois 
  Central; 
  Denver 
  

   Pacific 
  ; 
  Union 
  Pacific 
  ; 
  Atchison 
  and 
  Nebraska. 
  

  

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