﻿20 
  REPOET 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  in 
  comparison 
  with 
  the 
  whole 
  area 
  which 
  forms 
  the 
  native 
  home 
  of 
  the 
  

   species, 
  but 
  fortunately 
  in 
  one 
  respect 
  this 
  cultivated 
  belt 
  occupies 
  in 
  

   part, 
  at 
  least, 
  the 
  point 
  of 
  departure 
  of 
  the 
  swarms 
  which 
  invade 
  the 
  

   temporary 
  region. 
  This 
  fact, 
  therefore, 
  renders 
  it 
  more 
  important 
  that 
  

   it 
  be 
  occupied 
  by 
  an 
  agricultural 
  population. 
  

  

  Although 
  we 
  have 
  admitted 
  that 
  we 
  .are 
  unable 
  to 
  present 
  any 
  plan 
  

   of 
  exterminating 
  the 
  locusts 
  that 
  holds 
  out 
  sufficient 
  promise 
  of 
  success 
  

   to 
  justify 
  the 
  general 
  government 
  in 
  undertaking 
  it, 
  it 
  does 
  not 
  neces- 
  

   sarily 
  follow 
  that 
  there 
  is 
  no 
  plan 
  of 
  modifying 
  the 
  evil 
  which 
  the 
  gov- 
  

   ernment 
  would 
  be 
  justified 
  in 
  undertaking. 
  On 
  the 
  contrary, 
  if 
  the 
  

   views 
  we 
  have 
  advanced 
  be 
  correct, 
  they 
  suggest 
  a 
  means 
  by 
  which 
  the 
  

   general 
  government 
  might 
  greatly 
  aid 
  in 
  bringing 
  about 
  the 
  desired 
  re- 
  

   sult; 
  and 
  fortunately 
  the 
  result 
  would 
  be 
  beneficial 
  even 
  should 
  we 
  be 
  

   mistaken 
  in 
  the 
  opinions 
  advanced. 
  

  

  As 
  will 
  be 
  seen 
  by 
  what 
  has 
  been 
  stated, 
  the 
  great 
  desideratum 
  is 
  to 
  

   settle 
  the 
  cultivable 
  belt 
  alluded 
  to 
  as 
  rapidly 
  as 
  possible 
  with 
  an 
  agri- 
  

   cultural 
  population. 
  Wherever 
  valuable 
  and 
  permanent 
  mines 
  are 
  dis- 
  

   covered 
  in 
  the 
  neighboring 
  mountains, 
  the 
  arable 
  areas 
  in 
  the 
  vicinity 
  

   will 
  be 
  taken 
  up 
  and 
  cultivated 
  to 
  an 
  extent 
  at 
  least 
  sufficient 
  to 
  sup- 
  

   ply 
  the 
  demand 
  for 
  agricultural 
  products, 
  as 
  in 
  parts 
  of 
  Colorado. 
  But 
  

   there 
  are 
  large 
  sections 
  where 
  no 
  such 
  influence 
  will 
  be 
  brought 
  to 
  bear, 
  

   and 
  this 
  is 
  the 
  case 
  along 
  that 
  portion 
  of 
  the 
  belt 
  where 
  the 
  agricultural 
  

   population 
  is 
  most 
  needed 
  for 
  the 
  purpose 
  mentioned. 
  

  

  An 
  examination 
  of 
  map 
  No. 
  1> 
  in 
  our 
  first 
  report, 
  will 
  show 
  that 
  a 
  

   comparatively 
  limited 
  belt 
  in 
  Central 
  Montana, 
  extending 
  from 
  the 
  Big 
  

   Horn 
  Mountains 
  northwest 
  to 
  the 
  British 
  line, 
  a 
  little 
  west 
  of 
  Cypress 
  

   Hill, 
  forms 
  the 
  turning-point 
  of 
  the 
  locust 
  movements. 
  Without 
  now 
  

   repeating 
  the 
  data 
  which 
  may 
  be 
  found 
  in 
  that 
  report, 
  we 
  may 
  summa- 
  

   rize 
  it 
  by 
  saying 
  that 
  from 
  this 
  region 
  a 
  large 
  portion 
  of 
  the 
  swarms 
  come 
  

   which* 
  visit 
  Dakota, 
  Minnesota, 
  Nebraska, 
  and 
  Kansas; 
  from 
  this 
  area 
  

   also 
  proceed 
  a 
  large 
  portion 
  of 
  the 
  swarms 
  that 
  move 
  southwest 
  into 
  

   Idaho 
  and 
  Utah 
  ; 
  this 
  appears 
  to 
  be 
  the 
  point 
  to 
  which 
  most 
  of 
  the, 
  re- 
  

   turning 
  swarms 
  from 
  the 
  temporary 
  region 
  direct 
  th&r 
  flight. 
  

  

  That 
  there 
  are 
  other 
  areas 
  in 
  the 
  permanent 
  region 
  which 
  appear 
  to 
  

   be 
  special 
  breeding-grounds, 
  as 
  points 
  of 
  departure, 
  is 
  certainly 
  true, 
  but 
  

   none 
  to 
  such 
  an 
  extent 
  as 
  this, 
  and 
  none 
  affecting 
  an 
  agricultural 
  area 
  

   bearing 
  any 
  comparison 
  with 
  the 
  area 
  affected 
  by 
  the 
  locust 
  swarms 
  origi- 
  

   nating 
  in 
  this 
  belt. 
  

  

  Even 
  should 
  it 
  be 
  shown 
  by 
  subsequent 
  investigations 
  that 
  as 
  a 
  rule 
  

   the 
  swarms 
  falling 
  on 
  the 
  temporary 
  regions 
  come 
  from 
  intermediate 
  

   points, 
  as 
  Central 
  and 
  Southern 
  Dakota 
  and 
  Northwestern 
  Nebraska, 
  

   the 
  facts 
  already 
  ascertained 
  warrant 
  us 
  in 
  asserting 
  that, 
  as 
  a 
  very 
  gen- 
  

   eral 
  rule, 
  they 
  originate 
  in 
  the 
  belt 
  mentioned. 
  

  

  It 
  is 
  evident, 
  therefore, 
  that 
  if 
  any 
  method 
  can 
  be 
  devised 
  by 
  which 
  

   an 
  agricultural 
  (not 
  pastoral) 
  population 
  can 
  be 
  thrown 
  into 
  this 
  belt 
  it 
  

   will 
  form 
  one 
  of 
  the 
  best 
  possible 
  means 
  of 
  modifying 
  the 
  evil. 
  If 
  they 
  

  

  