﻿LAWS 
  GOVERNING 
  THE 
  MIGRATIONS 
  OF 
  LOCUSTS. 
  31 
  

  

  As 
  a 
  plan 
  of 
  relief, 
  propositions 
  were 
  brought 
  forward 
  some 
  years 
  

   ago 
  in 
  Southern 
  Russia 
  and 
  Algiers 
  to 
  form 
  companies 
  that 
  would 
  insure 
  

   against 
  losses 
  occasioned 
  by 
  locusts. 
  M. 
  Koppen, 
  who 
  discusses 
  these 
  

   propositions 
  at 
  some 
  length, 
  in 
  his 
  paper 
  " 
  On 
  the 
  destruction 
  of 
  the 
  

   locusts," 
  read 
  before 
  the 
  u 
  Exposition 
  Internationale 
  et 
  Congrds 
  (THygidne 
  

   et 
  de 
  Sauvetage," 
  at 
  Brussels, 
  in 
  1876, 
  arrives 
  at 
  the 
  conclusion 
  that 
  such 
  

   a 
  plan 
  would 
  be 
  impracticable 
  on 
  account 
  of 
  the 
  difficulty 
  of 
  assessing 
  

   damages. 
  

  

  CHAPTER 
  III. 
  

  

  FACTS 
  CONCERNING 
  AND 
  LAWS 
  GOVERNING 
  THE 
  MIGRA- 
  

   TIONS 
  OF 
  LOCUSTS 
  LN 
  ALL 
  COUNTRIES. 
  

  

  In 
  our 
  former 
  report 
  the 
  facts 
  relating 
  to 
  the 
  migrations 
  and 
  " 
  local 
  

   flights 
  " 
  of 
  the 
  Rocky 
  Mountain 
  locust 
  were 
  given 
  somewhat 
  fully, 
  and 
  

   also 
  discussed 
  to 
  some 
  extent 
  ; 
  but 
  the 
  time 
  allotted 
  to 
  the 
  preparation 
  

   of 
  that 
  report 
  and 
  the 
  space 
  allowed 
  did 
  not 
  permit 
  us 
  to 
  properly 
  ar- 
  

   range 
  and 
  give 
  all 
  the 
  data 
  collected, 
  much 
  less 
  fully 
  digest 
  and 
  discuss 
  

   it. 
  This 
  part 
  of 
  our 
  work 
  has 
  therefore 
  been 
  largely 
  reserved 
  for 
  this, 
  

   our 
  Second 
  Report. 
  

  

  As 
  we 
  have 
  heretofore 
  stated, 
  there 
  is 
  nothing 
  connected 
  with 
  th© 
  

   life-history 
  and 
  habits 
  of 
  the 
  locust, 
  no 
  matter 
  how 
  trivial 
  it 
  may 
  ap- 
  

   pear, 
  but 
  what 
  is 
  of 
  some 
  value 
  in 
  the 
  solution 
  of 
  the 
  problem 
  for 
  which 
  

   the 
  Commission 
  was 
  organized. 
  The 
  migratory 
  habit 
  constitutes, 
  in 
  

   fact, 
  one 
  of 
  the 
  chief 
  characteristics 
  of 
  the 
  migrating 
  species, 
  and 
  adds 
  

   very 
  largely 
  to 
  their 
  destructive 
  powers. 
  

  

  That 
  their 
  migrations 
  and 
  nights 
  are 
  governed 
  by 
  certain 
  laws 
  will 
  be 
  

   admitted 
  by 
  all 
  who 
  believe 
  that 
  the 
  forces 
  of 
  nature 
  are 
  governed 
  by 
  

   laws. 
  To 
  ascertain 
  what 
  these 
  laws 
  are 
  has 
  been 
  one 
  object 
  of 
  the 
  inves- 
  

   tigations 
  made 
  by 
  the 
  Commission, 
  and 
  although 
  we 
  are 
  fully 
  aware 
  that 
  

   our 
  work 
  is 
  not 
  complete 
  in 
  this 
  respect, 
  as 
  there 
  are 
  a 
  number 
  of 
  points 
  

   still 
  shrouded 
  in 
  mystery, 
  yet 
  we 
  believe 
  sufficient 
  data 
  have 
  been 
  col- 
  

   lected 
  to 
  enable 
  us 
  to 
  point 
  out 
  some 
  of 
  these 
  laws 
  as 
  positively 
  ascer- 
  

   tained, 
  and 
  to 
  present 
  more 
  fully 
  and 
  satisfactorily 
  than 
  has 
  been 
  done 
  

   heretofore 
  the 
  indications 
  of 
  others. 
  

  

  That, 
  as 
  a 
  rule, 
  the 
  various 
  kinds 
  of 
  grasshoppers, 
  or 
  species 
  of 
  Acrid- 
  

   idee, 
  are 
  not 
  migratory, 
  is 
  a 
  fact 
  well 
  known 
  to 
  all 
  j 
  in 
  fact, 
  out 
  of 
  th© 
  

   twelve 
  or 
  fifteen 
  hundred 
  species 
  belonging 
  to 
  the 
  family, 
  less 
  than 
  a 
  

   dozen 
  are 
  known 
  to 
  be 
  truly 
  migratory. 
  That 
  the 
  migrating 
  species 
  are 
  

   not 
  limited 
  to 
  any 
  one 
  genus 
  or 
  group 
  of 
  the 
  family 
  was 
  long 
  ago 
  as- 
  

   certained. 
  

  

  Oedipodini 
  and 
  Acridini 
  are 
  two 
  rather 
  well 
  marked 
  groups, 
  distin- 
  

   guished 
  from 
  each 
  other 
  by 
  important 
  characters, 
  yet 
  in 
  each 
  of 
  these 
  

   two 
  do 
  we 
  find 
  migrating 
  species. 
  It 
  is 
  evident, 
  therefore, 
  that 
  the 
  

   migratory 
  instinct, 
  or 
  disposition, 
  does 
  not 
  depend 
  upon 
  anatomical 
  

  

  