﻿164 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  ascens 
  most 
  abundantly 
  on 
  the 
  Alps 
  or 
  grassy 
  slopes 
  of 
  Gray's 
  Peak, 
  

   between 
  the 
  timber 
  line 
  and 
  the 
  bare 
  rocky 
  summit, 
  i. 
  e. 
  , 
  between 
  11,000 
  

   and 
  13,000 
  feet, 
  the 
  mountain 
  being 
  14,341 
  feet 
  elevation. 
  

  

  In 
  Utah, 
  Eastern 
  Idaho, 
  and 
  Montana 
  Anabrus 
  simplex 
  (Fig. 
  2) 
  abounds 
  

   at 
  elevations 
  of 
  much 
  less 
  height, 
  and 
  its 
  breeding 
  grounds 
  adjoin 
  those 
  of 
  

  

  the 
  locust. 
  For 
  ex- 
  

   ample, 
  the 
  black 
  

   cricket 
  of 
  the 
  Great 
  

   Salt 
  Lake 
  region 
  

   breeds 
  and 
  lives 
  on 
  

   the 
  bench-lands 
  

  

  Fig. 
  2.— 
  Anabrus 
  simplex 
  nat. 
  size 
  ; 
  a, 
  female 
  ; 
  b, 
  end 
  of 
  body 
  of 
  male, 
  Surrounding 
  the 
  

   showing 
  the 
  claspers. 
  l 
  a 
  k 
  e 
  . 
  fo^ 
  even 
  h 
  ere 
  

  

  they 
  do 
  not 
  usually 
  lay 
  their 
  eggs 
  in 
  the 
  more 
  fertile, 
  moist, 
  cultivated 
  

   lands 
  infested 
  by 
  the 
  Rocky 
  Mountain 
  locust. 
  From 
  the 
  bench-lands 
  

   of 
  the 
  Great 
  Salt 
  Lake 
  the 
  cricket 
  ranges 
  up 
  as 
  tar 
  at 
  least 
  as 
  about 
  

   8,000 
  feet 
  in 
  the 
  Wasatch 
  Mountains, 
  breeding 
  in 
  great 
  quantities 
  about 
  

   the 
  mining 
  towns, 
  and. 
  In 
  the 
  passes 
  among 
  the 
  mountains. 
  

  

  Although, 
  therefore, 
  ordinarily 
  the 
  crickets 
  lay 
  their 
  eggs 
  and 
  the 
  

   young 
  develop 
  in 
  the 
  dry 
  bench-lands 
  and 
  sides 
  of 
  the 
  foot-hills, 
  they 
  

   emigrate 
  from 
  this 
  region, 
  press 
  down 
  sometimes 
  in 
  great 
  numbers 
  and 
  

   invade 
  the 
  wheat-fields, 
  corn-fields, 
  and 
  pasture 
  lands 
  in 
  the 
  lower? 
  

   moister 
  tracts. 
  I 
  have 
  often 
  been 
  informed 
  that 
  this 
  was 
  the 
  habit 
  of 
  

   the 
  cricket 
  in 
  the 
  vicinity 
  of 
  Salt 
  Lake 
  City. 
  This 
  is 
  corroborated 
  by 
  

   the 
  observations 
  of 
  Mr. 
  Thomas, 
  published 
  in 
  Hayden's 
  Eeport 
  on 
  the 
  

   Geology 
  of 
  Montana 
  for 
  1871. 
  Referring 
  to 
  Anabrus 
  simplex, 
  the 
  com- 
  

   mon 
  brown 
  cricket 
  of 
  Northern 
  Utah 
  and 
  Eastern 
  Idaho, 
  he 
  writes 
  as 
  

   follows 
  : 
  

  

  At 
  some 
  points 
  we 
  found 
  them 
  so 
  abundant 
  as 
  literally 
  to 
  cover 
  the 
  ground. 
  In 
  two 
  

   or 
  three 
  instances 
  they 
  all 
  appeared 
  to 
  be 
  moving 
  in 
  one 
  direction, 
  as 
  if 
  impelled 
  by 
  

   some 
  common 
  motive. 
  I 
  recollect 
  one 
  instance, 
  on 
  Portneuf 
  River, 
  where 
  an 
  army 
  

   was 
  crossing 
  the 
  road. 
  It 
  was 
  probably 
  as 
  much 
  as 
  200 
  yards 
  in 
  width. 
  I 
  could 
  form 
  

   no 
  idea 
  as 
  to 
  its 
  length. 
  I 
  only 
  know 
  that 
  as 
  far 
  as 
  I 
  could 
  distinguish 
  objects 
  of 
  this 
  

   size 
  (being 
  on 
  horseback) 
  I 
  could 
  see 
  them 
  marching 
  on. 
  I 
  think 
  that 
  in 
  all 
  the 
  cases 
  

   where 
  I 
  saw 
  them 
  thus 
  moving, 
  it 
  was 
  towards 
  a 
  stream 
  of 
  water. 
  They 
  appear 
  to 
  be 
  

   very 
  fond 
  of 
  gathering 
  along 
  the 
  banks 
  and 
  in 
  the 
  vicinity 
  of 
  streams. 
  In 
  the 
  north 
  

   part 
  of 
  Cache 
  Valley 
  I 
  frequently 
  noticed 
  the 
  ditches 
  and 
  little 
  streams 
  covered 
  with 
  

   these 
  insects, 
  which, 
  having 
  fallen 
  in, 
  were 
  floating 
  down 
  on 
  the 
  surface 
  of 
  the 
  water, 
  

   and, 
  though 
  watching 
  them 
  for 
  hours, 
  they 
  would 
  flow 
  on 
  in 
  an 
  undiminished 
  stream. 
  

  

  While 
  encamped 
  on 
  a 
  little 
  creek 
  near 
  Franklin, 
  in 
  this 
  valley, 
  it 
  was 
  with 
  difficulty 
  

   we 
  could 
  keep 
  them 
  out 
  of 
  our 
  bedding 
  ; 
  and 
  when 
  one 
  went 
  to 
  breakfast, 
  we 
  found 
  

   the 
  underside 
  and 
  legs 
  of 
  the 
  table 
  and 
  stools 
  covered 
  with 
  them, 
  all 
  the 
  vigilance 
  of 
  

   the 
  cook 
  being 
  required 
  to 
  keep 
  them 
  out 
  of 
  the 
  victuals. 
  

  

  The 
  following 
  account 
  of 
  the 
  movements 
  of 
  an 
  army 
  of 
  the 
  large 
  brown 
  

   cricket 
  (Anabrus 
  simplex) 
  is 
  extracted 
  from 
  Mr. 
  Thomas's 
  notes 
  of 
  his 
  

   journey 
  in 
  1871 
  : 
  

  

  June 
  18, 
  Sunday, 
  between 
  Carpenter's 
  Station 
  and 
  the 
  toll-gate 
  at 
  Portneuf 
  Cross- 
  

   ing, 
  I 
  saw 
  a 
  large 
  army 
  of 
  this 
  species 
  moving 
  in 
  regular 
  order; 
  they 
  were 
  crossing 
  

  

  