﻿200 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  summer, 
  "The 
  Weekly. 
  Chronicle 
  " 
  reported 
  ravages 
  of 
  the 
  army-worm 
  

   in 
  July 
  in 
  the 
  vicinity 
  of 
  Stockton, 
  California. 
  If 
  the 
  latter 
  report 
  can 
  

   be 
  regarded 
  as 
  authentic, 
  it 
  is 
  safe 
  to 
  infer 
  that 
  the 
  insect 
  is, 
  or 
  may 
  occur 
  

   very 
  soon, 
  in 
  every 
  State 
  in 
  the 
  Union. 
  

  

  Living 
  specimens 
  were 
  also 
  observed 
  to 
  issue 
  from 
  Mexican 
  cereals 
  

   exhibited 
  at 
  the 
  World's 
  Fair 
  held 
  at 
  Chicago. 
  

  

  It 
  has 
  been 
  recorded 
  from 
  the 
  Island 
  of 
  Jamaica, 
  and 
  will 
  probably 
  be 
  

   found 
  in 
  other 
  islands 
  of 
  the 
  West 
  Indies. 
  Other 
  localities 
  are 
  : 
  various 
  

   parts 
  of 
  South 
  America, 
  — 
  Venezuela, 
  United 
  States 
  of 
  Colombia, 
  and 
  

   Brazil; 
  Isle 
  of 
  Wight 
  ; 
  Lewes, 
  South 
  England; 
  Maderia; 
  Province 
  of 
  

   Nepaul, 
  North 
  India; 
  Java; 
  several 
  places 
  in 
  Australia; 
  New 
  Zealand 
  

   and 
  Tasmania. 
  Leucania 
  unipimcta 
  may 
  well 
  be 
  deemed 
  cosmopolitan, 
  

   although 
  only 
  in 
  the 
  United 
  States 
  does 
  its 
  ravages 
  attract 
  much 
  attention. 
  

  

  Description 
  of 
  the 
  Insect. 
  

  

  Although 
  the 
  insect 
  is 
  a 
  common 
  one, 
  and 
  occurs 
  in 
  considerable 
  num- 
  

   bers 
  each 
  year 
  in 
  the 
  State 
  of 
  New 
  York, 
  yet 
  from 
  its 
  seldom 
  attracting 
  

   particular 
  attention, 
  owing 
  to 
  its 
  ordinary 
  nocturnal 
  habits, 
  it 
  appears 
  to 
  

   be 
  known 
  to 
  very 
  few 
  persons 
  other 
  than 
  entomologists. 
  The 
  following 
  

   account 
  of 
  its 
  features 
  in 
  its 
  several 
  stages 
  may 
  serve 
  as 
  a 
  guide 
  to 
  its 
  

   recognition. 
  

  

  The 
  eggs. 
  — 
  They 
  will 
  rarely 
  be 
  seen 
  by 
  the 
  ordinary 
  farmer, 
  but 
  when 
  

   met 
  with, 
  they 
  may 
  be 
  recognized 
  from 
  the 
  following 
  characters 
  : 
  They 
  

   are 
  smooth, 
  white 
  when 
  first 
  laid, 
  turning 
  gradually 
  to 
  a 
  pale 
  straw 
  color 
  

   before 
  hatching, 
  about 
  0.023 
  ^^^^ 
  i^^ 
  diameter, 
  and 
  usually 
  deposited 
  in 
  

   masses 
  glued 
  together 
  by 
  an 
  adhesive 
  substance. 
  They 
  may 
  be 
  found 
  

   between 
  the 
  leaf-sheath 
  and 
  the 
  stem 
  of 
  grasses, 
  — 
  the 
  toughest 
  stalks 
  in 
  

   the 
  thickest 
  clumps 
  being 
  preferred 
  for 
  their 
  place 
  of 
  deposit 
  • 
  They 
  are 
  

   also 
  at 
  times, 
  laid 
  on 
  other 
  herbage, 
  on 
  dead 
  stems, 
  sticks, 
  and 
  in 
  other 
  

   less 
  favorable 
  places 
  when 
  the 
  moths 
  are 
  abundant. 
  

  

  The 
  young 
  cateipillars. 
  — 
  They 
  are 
  rarely 
  seen 
  and 
  yet 
  it 
  is 
  of 
  great 
  im- 
  

   portance 
  that 
  the 
  farmer 
  should 
  be 
  able 
  to 
  recognize 
  them 
  before 
  ex- 
  

   tensive 
  depredations 
  have 
  proclaimed 
  their 
  true 
  character. 
  The 
  recently 
  

   hatched 
  army-worms 
  are 
  about 
  0.07 
  of 
  an 
  inch 
  (1.7 
  mm.) 
  long 
  and 
  of 
  a 
  

   dull 
  translucent 
  white 
  color. 
  The 
  head 
  is 
  brownish-black 
  or 
  yellowish 
  

   with 
  dark 
  eyes. 
  On 
  both 
  head 
  and 
  body 
  there 
  are 
  minute 
  scattering 
  

   hairs. 
  The 
  young 
  larvae 
  walk 
  in 
  a 
  looping 
  manner, 
  as 
  the 
  two 
  anterior 
  

   pairs 
  of 
  abdominal 
  legs 
  are 
  atrophied. 
  

  

  After 
  the 
  first 
  molt 
  the 
  larvae 
  are 
  about 
  0.2 
  of 
  an 
  inch 
  (5 
  mm.) 
  long. 
  

   The 
  head 
  is 
  a 
  little 
  darker 
  in 
  some 
  cases 
  and 
  the 
  striping 
  seen 
  in 
  the 
  full 
  

  

  