﻿594 
  EEPORT 
  UNITED 
  STATES 
  GEOLOGICAL 
  SURVEY. 
  

  

  mingling 
  with 
  the 
  pale-green 
  pupte 
  of 
  Caloptenus 
  Mvittatus 
  and 
  the 
  larvse 
  

   and 
  adult 
  of 
  (Edipoda 
  Carolina. 
  

  

  At 
  Idaho 
  Springs 
  (7,o30 
  feet 
  elevation), 
  July 
  5, 
  the 
  young 
  larvse 
  of 
  the 
  

   locust 
  were 
  smaller 
  than 
  I 
  had 
  yet 
  seen, 
  being 
  about 
  a 
  quarter 
  of 
  an 
  inch 
  

   long, 
  and 
  in 
  all 
  stages, 
  from 
  the 
  lately-hatched 
  to 
  the 
  pupse 
  and 
  winged 
  

   individuals. 
  I 
  was 
  told, 
  however, 
  that 
  the 
  first 
  brood 
  of 
  locusts 
  hatched 
  

   about 
  the 
  end 
  of 
  April 
  and 
  early 
  in 
  May, 
  but 
  that 
  winged 
  individuals 
  

   did 
  not 
  appear 
  until 
  June 
  20. 
  Ou 
  Gray's 
  Peak, 
  July 
  7, 
  owing 
  to 
  the 
  

   coolness 
  of 
  the 
  day, 
  a 
  little 
  snow 
  falling 
  on 
  the 
  summit 
  and 
  rain 
  below, 
  

   no 
  grasshoppers, 
  wingless 
  or 
  winged, 
  were 
  seen. 
  In 
  Kelso 
  Gulch, 
  

   near 
  Georgetown, 
  no 
  young 
  were 
  seen, 
  and 
  but 
  a 
  few 
  winged 
  ones. 
  At 
  

   Georgetown 
  (8,412 
  feet 
  elevation), 
  on 
  the 
  flats 
  near 
  the 
  town 
  the 
  young 
  

   were 
  a 
  quarter 
  to 
  one-half 
  an 
  inch 
  long. 
  Mr. 
  K. 
  S. 
  Morrison 
  informed 
  

   me 
  that 
  the 
  locust 
  at 
  Georgetown 
  begins 
  to 
  hatch 
  about 
  the 
  1st 
  of 
  June, 
  

   a 
  month 
  or 
  more 
  later 
  than 
  at 
  Denver, 
  and 
  continues 
  to 
  hatch 
  out 
  until 
  

   the 
  1 
  St 
  of 
  July, 
  as 
  the 
  localities 
  differ 
  in 
  height. 
  About 
  June 
  23, 
  he 
  said, 
  

   the 
  locusts 
  begin 
  to 
  get 
  their 
  wings, 
  but 
  they 
  do 
  not 
  migrate 
  until 
  

   August, 
  when 
  they 
  assemble 
  in 
  great 
  swarms 
  on 
  the 
  mountains, 
  and 
  

   falling 
  on 
  the 
  snow 
  in 
  immense 
  numbers, 
  are 
  eaten 
  by 
  the 
  bears. 
  

  

  July 
  9, 
  at 
  Floyd's 
  Hill 
  the 
  grasshoppers 
  were 
  seen 
  by 
  thousands 
  fly- 
  

   ing 
  westward 
  up 
  the 
  caiion. 
  I 
  did 
  not 
  go 
  into 
  South 
  Park, 
  but 
  was 
  

   told 
  by 
  an 
  int-elligent 
  young 
  man 
  that 
  at 
  a 
  point 
  about 
  a 
  thousand 
  feet 
  

   below 
  the 
  level 
  of 
  the 
  park 
  he 
  saw 
  the 
  locusts 
  flying 
  about 
  June 
  25. 
  

  

  July 
  12, 
  in 
  the 
  Garden 
  of 
  the 
  Gods 
  (about 
  G,2U0 
  feet 
  elevation), 
  while 
  

   there 
  were 
  few 
  to 
  be 
  seen 
  on 
  the 
  ground, 
  the 
  air 
  was 
  filled 
  with 
  them, 
  

   flying 
  at 
  all 
  distances 
  from 
  100 
  to 
  more 
  than 
  1,000 
  feet, 
  for 
  their 
  altitude 
  

   could 
  be 
  approximately 
  measured 
  by 
  the 
  highest 
  sandstone 
  column 
  of 
  

   the 
  Cathedral 
  Eocks. 
  'When 
  a 
  locust 
  takes 
  wing, 
  it 
  rises 
  more 
  readily 
  

   on 
  a 
  light 
  breeze 
  and 
  flies 
  off 
  in 
  a 
  zigzag 
  course, 
  gradually 
  lising 
  

   in 
  height 
  until 
  it 
  sails 
  about, 
  if 
  the 
  wind 
  is 
  light, 
  in 
  an 
  uncertain 
  course. 
  

   In 
  the 
  Garden 
  of 
  the 
  Gods, 
  where 
  the 
  breeze 
  was 
  northeast, 
  they 
  were 
  

   driven 
  southwest; 
  but 
  farther 
  up 
  the 
  valley, 
  toward 
  Manitou 
  Springs 
  

   (0,297 
  feet 
  elevation), 
  when 
  the 
  wind 
  was 
  westerly, 
  they 
  were 
  borne 
  in 
  

   an 
  easterly 
  direction. 
  Their 
  rapidity 
  of 
  flight 
  seemed 
  to 
  depend 
  on 
  the 
  

   strength 
  of 
  the 
  wind, 
  and 
  when 
  the 
  latter 
  was 
  light, 
  individuals 
  could 
  

   be 
  seen 
  flying 
  about 
  in 
  all 
  directions, 
  crossing 
  each 
  other 
  in 
  their 
  flight, 
  

   but 
  the 
  swarm 
  as 
  a 
  whole 
  were 
  moving 
  with 
  the 
  wind. 
  A 
  few 
  pup^e 
  

   were 
  seen 
  on 
  the 
  ground. 
  

  

  At 
  Manitou, 
  the 
  locusts 
  are 
  said 
  to 
  have 
  hatched 
  out 
  in 
  April, 
  and 
  to 
  

   have 
  taken 
  two 
  mouths 
  to 
  get 
  their 
  wings. 
  A 
  few 
  pupae 
  were 
  still 
  to 
  be 
  

   seen 
  in 
  the 
  oats, 
  and 
  in 
  the 
  spring 
  they 
  did 
  a 
  good 
  deal 
  of 
  damage, 
  

   thinning 
  'the 
  oats 
  and 
  devouring 
  the 
  beets 
  and 
  other 
  garden- 
  vegetables. 
  

   There 
  were 
  few 
  grasshoppers 
  to 
  be 
  seen 
  in 
  the 
  air 
  at 
  half 
  past 
  8 
  in 
  the 
  

   morning, 
  but 
  by 
  11 
  o'clock 
  there 
  were 
  many 
  more. 
  There 
  is 
  probably 
  

   good 
  ground 
  for 
  the 
  popular 
  opinion 
  that 
  they 
  descend 
  to 
  the 
  ground 
  

   at 
  night 
  and 
  fly 
  up 
  toward 
  midday, 
  flying 
  by 
  day 
  and 
  resting 
  and 
  feed- 
  

   ing 
  at 
  night. 
  

  

  At 
  this 
  date 
  I 
  was 
  informed 
  by 
  a 
  man 
  who 
  had 
  just 
  arrived 
  from 
  Fair 
  

   Play 
  (elevation 
  9,964 
  feet) 
  that 
  there 
  were 
  few 
  \ocnsts 
  {C. 
  spretus) 
  in 
  

   South 
  Park 
  (8,000 
  to 
  10,000 
  feet 
  elevation) 
  and 
  Arkansas 
  Valley 
  this 
  

   summer. 
  

  

  Mr. 
  W. 
  H. 
  Holmes, 
  assistant 
  on 
  the 
  Survey, 
  writes 
  from 
  Southern 
  Col- 
  

   orado 
  that 
  the 
  grasshoppers 
  had 
  " 
  eaten 
  up 
  everything" 
  on 
  the 
  La 
  Plata. 
  

  

  On 
  July 
  14, 
  I 
  ascended 
  Pike's 
  Peak, 
  and 
  at 
  an 
  elevation 
  of 
  about 
  

   8,000 
  to 
  9,000 
  feet 
  found 
  larvse 
  in 
  the 
  second 
  stage 
  and 
  pupse 
  of 
  C. 
  spre- 
  

   tus. 
  Some 
  not 
  more 
  than 
  one-fifth 
  of 
  an 
  inch 
  long 
  were 
  seen 
  clustering 
  

  

  