﻿PROBABILITIES 
  FOR 
  1882. 
  51 
  

  

  breeze. 
  This 
  was 
  in 
  the 
  vicinity 
  of 
  GreeJey, 
  Colo. 
  I 
  do 
  not 
  know 
  

   where 
  they 
  were 
  hatched, 
  but 
  think 
  they 
  had 
  not 
  come 
  from 
  any 
  great 
  

   distance. 
  They 
  were 
  undoubtedly 
  reared 
  among 
  the 
  foot-hills 
  west 
  of 
  

   Denver, 
  and 
  migrated 
  to 
  some 
  part 
  of 
  Western 
  Nebraska 
  or 
  South- 
  

   western 
  Dakota 
  near 
  the 
  Black 
  Hills. 
  There 
  were 
  not 
  enough 
  of 
  them, 
  

   however, 
  to 
  cause 
  alarm 
  for 
  the 
  coming 
  summer, 
  but 
  there 
  may 
  and 
  in 
  

   all 
  probability 
  will 
  be 
  a 
  few 
  scattered 
  swarms 
  emanating 
  from 
  these 
  that 
  

   may 
  visit 
  portions 
  of 
  Nebraska 
  and 
  Dakota. 
  Again, 
  ou 
  the 
  17th 
  of 
  

   August, 
  a 
  few 
  C. 
  spretus 
  were 
  noticed 
  in 
  the 
  air 
  and 
  others 
  ou 
  the 
  ground, 
  

   some 
  of 
  the 
  latter 
  of 
  which 
  were 
  copulating 
  preparatory 
  to 
  egg 
  deposit- 
  

   ing. 
  These, 
  however, 
  were 
  few 
  io 
  number, 
  and 
  consequently 
  of 
  no 
  im- 
  

   portance. 
  

  

  The 
  next 
  swarm 
  of 
  locusts 
  heard 
  of 
  was 
  at 
  Eawlins 
  Station, 
  where 
  Mr. 
  

   W. 
  A. 
  Irwin 
  informed 
  me 
  that 
  a 
  swarm 
  of 
  locusts 
  had 
  beeu 
  seen 
  on 
  Salt 
  

   Eiver, 
  a 
  branch 
  of 
  Snake 
  Eiver, 
  in 
  Eastern 
  Idaho, 
  July 
  30. 
  He 
  did 
  not 
  

   notice 
  any 
  of 
  them 
  in 
  the 
  air, 
  but 
  was 
  quite 
  positive 
  that 
  they 
  were 
  of 
  

   the 
  " 
  migratory 
  species," 
  as 
  he 
  had 
  seen 
  this 
  insect 
  in 
  Kansas 
  and 
  Ne- 
  

   braska 
  when 
  they 
  were 
  so 
  numerous 
  there. 
  

  

  Another 
  swarm 
  of 
  locusts 
  for 
  this 
  year 
  was 
  that 
  hatched 
  in 
  the 
  vicin- 
  

   ity 
  of 
  Deer 
  Lodge, 
  Mont. 
  Early 
  in 
  May 
  the 
  young 
  larvse 
  appeared 
  in 
  

   great 
  numbers 
  over 
  a 
  small 
  tract 
  of 
  country 
  lying 
  to 
  the 
  west 
  of 
  this 
  

   city, 
  where 
  they 
  did 
  some 
  damage 
  to 
  grass 
  and 
  several 
  fields 
  of 
  grain 
  in 
  

   some 
  of 
  the 
  smaller 
  side 
  valleys. 
  They 
  were 
  supposed 
  to 
  have 
  origi- 
  

   nated 
  from 
  a 
  swarm 
  that 
  must 
  have 
  come 
  in, 
  left 
  its 
  eggs, 
  and 
  with- 
  

   drawn 
  immediately 
  after 
  this 
  operation, 
  as 
  no 
  one 
  could 
  inform 
  me 
  of 
  the 
  

   particulars, 
  or 
  even 
  of 
  any 
  having 
  been 
  seen 
  the 
  previous 
  fall. 
  These 
  

   also 
  disappeared 
  as 
  mysteriously 
  as 
  they 
  came, 
  as 
  none 
  were 
  seen 
  to 
  fly. 
  

   It 
  is 
  my 
  opinion 
  now 
  that 
  this 
  was 
  the 
  offspring 
  of 
  the 
  small 
  swarm 
  that 
  

   last 
  season 
  was 
  reared 
  a 
  few 
  miles 
  southeast 
  of 
  Helena, 
  and 
  that 
  was 
  

   supposed 
  to 
  have 
  been 
  destroyed 
  by 
  a 
  flock 
  of 
  sickle-billed 
  curlew. 
  

  

  Another 
  swarm, 
  or 
  rather 
  several 
  small 
  swarms 
  of 
  locusts, 
  were 
  reared 
  

   in 
  the 
  vicinity 
  of 
  Missoula 
  and 
  Frenchtown 
  this 
  past 
  spring 
  from 
  eggs 
  

   that 
  were 
  left 
  by 
  a 
  swarm 
  coming 
  from 
  the 
  north 
  and 
  west. 
  These 
  did 
  

   some 
  damage 
  to 
  the 
  wild 
  grasses 
  up 
  among 
  the 
  foot-hills, 
  but 
  did 
  not 
  

   come 
  down 
  into 
  the 
  valley. 
  As 
  soon 
  as 
  they 
  matured 
  they 
  became 
  very 
  

   restless 
  and 
  flew 
  about 
  in 
  various 
  directions, 
  coming 
  and 
  going 
  as 
  if 
  un- 
  

   decided 
  what 
  direction 
  to 
  take. 
  They 
  finally 
  left, 
  most 
  going 
  south 
  ward 
  ; 
  

   but 
  a 
  few 
  went 
  to 
  the 
  north 
  in 
  the 
  direction 
  of 
  Flat 
  Head 
  Lake 
  and 
  

   Boundary 
  Pass, 
  where 
  they 
  undoubtedly 
  crossed 
  over 
  the 
  range 
  and 
  

   entered 
  the 
  great 
  Breeding 
  Center 
  of 
  the 
  North. 
  Those 
  going 
  south 
  I 
  

   was 
  unable 
  to 
  trace, 
  but 
  suppose 
  they 
  came 
  to 
  a 
  halt 
  somewhere 
  in 
  the 
  

   Salmon 
  Eiver 
  country, 
  in 
  which 
  locality 
  they 
  will 
  rear 
  their 
  youug, 
  to 
  

   continue 
  their 
  southward 
  movements 
  the 
  coming 
  year. 
  

  

  During 
  the 
  fall 
  of 
  1880 
  locusts 
  came 
  into 
  the 
  valleys 
  of 
  eastern 
  

   Washington 
  Territory 
  from 
  the 
  northeast, 
  did 
  some 
  damage 
  to 
  grain 
  in 
  

   some 
  isolated 
  localities 
  along 
  the 
  line 
  of 
  the 
  Northern 
  Pacific 
  Eailroacl, 
  

  

  