﻿12 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  this 
  time 
  until 
  1874 
  and 
  1875 
  tliere 
  was 
  no 
  damage 
  done 
  in 
  this 
  part 
  of 
  

   Montana, 
  and 
  but 
  few 
  locusts 
  seen 
  in 
  the 
  air. 
  Hence, 
  nothing 
  like 
  re- 
  

   liable 
  data 
  can 
  be 
  had 
  in 
  reference 
  to 
  their 
  movements. 
  

  

  In 
  the 
  summer 
  of 
  1874, 
  during 
  the 
  months 
  of 
  July 
  and 
  August, 
  great 
  

   and 
  destructiv^e 
  swarms 
  i)Oured 
  in 
  from 
  the 
  east, 
  where 
  it 
  is 
  claimed 
  

   they 
  hatched 
  throughout 
  the 
  Yellowstone, 
  Musselshell, 
  and 
  Judith 
  

   basins; 
  and 
  to 
  this 
  effect 
  I 
  have 
  much 
  information 
  from 
  various 
  sol- 
  

   diers 
  who 
  spent 
  this 
  and 
  the 
  previous 
  summers 
  in 
  these 
  basins. 
  

  

  Some 
  of 
  these 
  deposited 
  their 
  eggs, 
  while 
  the 
  majority 
  continued 
  west- 
  

   ward 
  and 
  southward. 
  Considerable 
  damage 
  was 
  done 
  in 
  the 
  spring 
  of 
  

   1875 
  by 
  the 
  young. 
  

  

  From 
  this 
  time 
  on 
  nothing 
  more 
  was 
  seen 
  of 
  the 
  locusts 
  in 
  the 
  Grana- 
  

   tin 
  Yalley 
  until 
  the 
  summer 
  of 
  1878 
  ; 
  but 
  the 
  greater 
  portion 
  of 
  the 
  

   Northwest, 
  the 
  Judith, 
  Musselshell, 
  and 
  the 
  Big 
  Horn 
  countries, 
  were 
  

   overrun 
  by 
  swarms 
  of 
  them 
  that 
  were 
  produced 
  in 
  these 
  several 
  sections 
  

   during 
  the 
  summers 
  of 
  1873, 
  1874, 
  1875, 
  1876, 
  and 
  1877. 
  Of 
  the 
  move- 
  

   ments 
  of 
  these 
  different 
  swarms 
  I 
  could 
  not 
  obtain 
  any 
  definite 
  infor- 
  

   mation 
  by 
  which 
  I 
  could 
  trace 
  them 
  as 
  I 
  did 
  those 
  of 
  1878, 
  but 
  obtained 
  

   enough 
  to 
  enable 
  me 
  to 
  pa;rtially 
  keep 
  track 
  of 
  them. 
  They 
  seemed 
  to 
  

   spread 
  over 
  the 
  greater 
  portion 
  of 
  the 
  "permanent" 
  and 
  "sub-perma- 
  

   nent" 
  regions, 
  as 
  mapped 
  out 
  in 
  the 
  report 
  of 
  1878, 
  and 
  finally 
  over 
  the 
  

   entire 
  portion 
  known 
  to 
  ever 
  receive 
  invasions 
  from 
  this 
  species 
  of 
  

   locust, 
  attaining 
  the 
  maximum 
  in 
  1875-'77, 
  from 
  which 
  time 
  they 
  have 
  

   been 
  growing 
  less 
  numerous 
  and 
  injurious 
  until 
  the 
  present, 
  when 
  but 
  

   few 
  small 
  swarms 
  remain 
  in 
  the 
  entire 
  area. 
  

  

  Again, 
  in 
  August, 
  1878, 
  the 
  Gallatin 
  Yalley 
  Avas 
  invaded 
  by 
  swarms 
  

   from 
  the 
  northeast. 
  ]!Srone, 
  however, 
  remained 
  to 
  deposit 
  eggs. 
  They 
  

   passed 
  on 
  to 
  the 
  south 
  and 
  southwest 
  — 
  probably 
  the 
  same 
  swarms 
  

   that 
  invaded 
  Idaho 
  and 
  Utah 
  Territories 
  from 
  the 
  north-northeast, 
  of 
  

   the 
  same 
  year, 
  and 
  which 
  we 
  saw 
  during 
  August 
  while 
  in 
  these 
  Terri- 
  

   tories. 
  They 
  came 
  from 
  the 
  Judith 
  and 
  Musselshell 
  Yalleys 
  and 
  far- 
  

   ther 
  north, 
  and 
  are 
  identical 
  with 
  those 
  seen 
  about 
  one 
  week 
  previous 
  

   near 
  the 
  Milk 
  Eiver 
  and 
  Missouri. 
  

  

  August 
  6. 
  — 
  Met 
  a 
  gentleman 
  who 
  informed 
  me 
  of 
  the 
  presence 
  of 
  

   locusts 
  (C 
  sjnetus) 
  in 
  the 
  vicinity 
  of 
  Butte, 
  in 
  western 
  Montana. 
  They 
  

   were 
  hatched 
  there, 
  but 
  up 
  to 
  time 
  of 
  writing 
  no 
  great 
  amount 
  of 
  dam- 
  

   age 
  has 
  been 
  done 
  hy 
  them. 
  Just 
  how 
  much 
  :territory 
  they 
  covered 
  I 
  

   could 
  not 
  ascertain, 
  but 
  do 
  not 
  think 
  it 
  great. 
  Have 
  been 
  in 
  this 
  vicin- 
  

   ity 
  since 
  and 
  found 
  but 
  very 
  few, 
  hardly 
  as 
  numerous 
  as 
  they 
  are 
  in 
  

   the 
  Missouri 
  River 
  region 
  of 
  Nebraska 
  and 
  Kansas 
  in 
  years 
  not 
  visited 
  

   by 
  locust 
  swarms. 
  This 
  district 
  is 
  drained 
  by 
  one 
  of 
  the 
  tributaries 
  of 
  

   Hellgate 
  River, 
  a 
  branch 
  of 
  the 
  Columbia, 
  and 
  is 
  quite 
  mountainous. 
  

   The 
  entire 
  surrounding 
  country 
  is 
  a 
  mining 
  district, 
  and 
  but 
  little 
  farm- 
  

   ing 
  is 
  done. 
  It 
  is 
  supi)osed 
  that 
  these 
  few 
  originated 
  from 
  the 
  rem- 
  

   nants 
  of 
  swarms 
  that 
  were 
  hatched 
  in 
  the 
  neighborhood 
  of 
  Flathead 
  

   Lake 
  and 
  a 
  few 
  other 
  isolated 
  localities 
  in 
  the 
  spring 
  of 
  1879, 
  and 
  left 
  

  

  