﻿720 
  

  

  KEPOET 
  UNITED 
  STATES 
  GEOLOGICAL 
  SURVEY. 
  

  

  brooded. 
  " 
  The 
  young 
  worm 
  hatches 
  about 
  the 
  1st 
  of 
  July 
  and 
  imme- 
  

   diately 
  commences 
  its 
  work 
  of 
  destruction. 
  It 
  works 
  in 
  such 
  a 
  surrep- 
  

   titious 
  manner 
  as 
  to 
  be 
  too 
  often 
  unnoticed 
  till 
  the 
  vine 
  is 
  destroyed. 
  

   The 
  plant 
  does 
  not 
  generally 
  show 
  any 
  signs 
  of 
  decay 
  until 
  the 
  cocoon 
  ii 
  

   is 
  about 
  fully 
  grown, 
  vfhen 
  it 
  wilts 
  and 
  is 
  past 
  recovery. 
  This 
  occurs 
  f| 
  

   about 
  a 
  month 
  after 
  the 
  worm 
  is 
  hatched, 
  and 
  it 
  then 
  crawls 
  just 
  under 
  

   the 
  surface 
  of 
  the 
  ground, 
  fastens 
  a 
  little 
  earth 
  together 
  around 
  itself 
  

   by 
  a 
  slight 
  net, 
  and 
  changes 
  to 
  a 
  chrysalis 
  of 
  a 
  very 
  light 
  mahogany- 
  

   brown 
  color, 
  and 
  three-fourths 
  of 
  an 
  inch 
  long. 
  The 
  moth 
  comes 
  forth 
  

   the 
  fore 
  part 
  of 
  September. 
  The 
  careful 
  culturist 
  need 
  fear 
  nothing 
  

   from 
  this 
  troublesome 
  insect, 
  as 
  an 
  occasional 
  close 
  inspection 
  of 
  the 
  ;, 
  

   plants 
  about 
  the 
  1st 
  of 
  July 
  will 
  reveal 
  the 
  hole 
  where 
  the 
  borer 
  has 
  jj 
  

   entered, 
  which 
  is 
  generally 
  quite 
  a 
  distance 
  from 
  the 
  ground, 
  and 
  by'' 
  

   splitting 
  downward 
  one 
  side 
  of 
  the 
  stalk 
  with 
  a 
  penknife 
  it 
  may 
  be 
  found 
  

   and 
  killed. 
  If 
  this 
  inspection 
  be 
  naade 
  at 
  the 
  proper 
  time 
  the 
  worm 
  will 
  1 
  1 
  

   be 
  found 
  but 
  a 
  short 
  distance 
  from 
  the 
  hole, 
  and 
  the 
  split 
  in 
  the 
  stalk 
  || 
  

   will 
  heal 
  by 
  being 
  kejjt 
  closed 
  with 
  a 
  piece 
  of 
  thread." 
  — 
  (Eiley.) 
  it 
  

  

  Description 
  of 
  the 
  larva. 
  — 
  Of 
  a 
  livid 
  line 
  vrheu 
  young, 
  with 
  light 
  stripes 
  along 
  the 
  

   body 
  ; 
  when 
  full 
  grown, 
  it 
  generally 
  becomes 
  lighter, 
  with 
  the 
  longitudinal 
  lines 
  

   broader. 
  

  

  Moth. 
  — 
  Of 
  a 
  mouse-gray 
  color, 
  with 
  the 
  fore-wings 
  finely 
  sprinkled 
  with 
  Naples-yel- 
  

   low, 
  and 
  having 
  a 
  very 
  faint 
  lilac-colored 
  hue; 
  but 
  distinguished 
  mainly 
  by 
  an 
  arcu- 
  

   ated 
  pale 
  line 
  running 
  across 
  their 
  outer 
  third. 
  — 
  (Eiley.) 
  

  

  Besides 
  the 
  chinch-bug, 
  and 
  also 
  other 
  insects 
  already 
  noticed 
  among 
  

   those 
  preying 
  on, 
  wheat, 
  the 
  leaves 
  of 
  corn 
  are 
  infested 
  by 
  the 
  young 
  of 
  

   the 
  large 
  lo 
  moth 
  and 
  by 
  the 
  Arctia 
  arge. 
  

  

  The 
  cotton-boll 
  worm 
  {HeliotJiis 
  armigera) 
  sometimes 
  attacks 
  corn 
  in 
  

   the 
  ear, 
  eating 
  the 
  silk, 
  and 
  afterward 
  devouring 
  the 
  terminal 
  kernels, 
  

   hiding 
  within 
  the 
  husk. 
  Whole 
  fields 
  of 
  corn 
  have 
  been 
  thus 
  injured 
  

   in 
  Kentucky, 
  but 
  it 
  is 
  most 
  destructive 
  in 
  Southern 
  Illinois, 
  where 
  there 
  

   are 
  two 
  broods 
  of 
  the 
  worm, 
  the 
  early 
  and 
  late 
  corn 
  faring 
  the 
  worst. 
  

  

  INJUEIKG 
  THE 
  EOOTS 
  AND 
  LEAVES 
  OF 
  GEASS. 
  

  

  Besides 
  most 
  of 
  the 
  insects 
  previously 
  mentioned, 
  which 
  injure 
  the 
  

  

  roots 
  and 
  stalks 
  of 
  cereals, 
  the 
  

   grass 
  on 
  lawns 
  is 
  often 
  kdled 
  

   in 
  patches 
  by 
  the 
  white 
  grub 
  or 
  

   larva 
  of 
  the 
  June 
  beetle 
  {Lack- 
  

   nosterna 
  fiisca, 
  Fig. 
  10). 
  So 
  

   effectually 
  are 
  the 
  roots 
  eaten 
  

   that 
  the 
  sod 
  can 
  be 
  rolled 
  up 
  

   like 
  a 
  carpet. 
  The 
  white 
  grub 
  

   is 
  injurious 
  on 
  lawns 
  in 
  Illinois, 
  

   as 
  well 
  as 
  in 
  the 
  New 
  England 
  

   States. 
  Wire-worms, 
  the 
  larva 
  

   of 
  the 
  various 
  species 
  of 
  Ne- 
  

   onympJia, 
  cut-worms, 
  tbe 
  larvoe 
  

   of 
  crane-tlies 
  ( 
  Tiimla),Rn(l 
  of 
  the 
  

   salt-marsh 
  caterpillars 
  (Leu- 
  

   carctia 
  acrcva)^ 
  and 
  very 
  hom- 
  

   opterous 
  insects, 
  such 
  as 
  the 
  

   Tig 
  10— 
  JauGheetle, 
  LaclinosteinafusGci. 
  1, 
  larva; 
  Spittle 
  insects, 
  especially 
  Pty- 
  

   2, 
  pupa; 
  3, 
  4, 
  adult. 
  c/it.s 
  lineatus, 
  (Fig. 
  H), 
  ^re 
  de- 
  

  

  pendent 
  for 
  their 
  livelihood 
  on 
  grasses. 
  TTie 
  latter 
  is 
  a 
  very 
  abuu- 
  

  

  