﻿PACKARD.] 
  THE 
  COTTON 
  ARMY-WORM. 
  775 
  

  

  The 
  Hop 
  Vine 
  Root-Boreb, 
  Eepialus 
  mustelimis 
  Packard. 
  — 
  This 
  

   moth 
  is 
  closely 
  allied 
  to 
  the 
  Hepialus 
  humuli 
  of 
  Europe, 
  which 
  bores 
  in 
  

   the 
  roots 
  of 
  the 
  hop. 
  JSTo 
  borer 
  has 
  yet 
  been 
  detected 
  in 
  our 
  vines, 
  but 
  

   it 
  is 
  not 
  improbable 
  that 
  the 
  above-named 
  species 
  will 
  be 
  found 
  to 
  attack 
  

   this 
  plant. 
  It 
  flies 
  in 
  Maine 
  from 
  the 
  middle 
  of 
  July 
  to 
  the 
  middle 
  of 
  

   August. 
  

  

  pescnption 
  of 
  the 
  moth. 
  — 
  Female 
  witli 
  the 
  body 
  and 
  wings 
  sable-brown. 
  Fore 
  wings 
  

   with 
  three 
  broad 
  silvery 
  spots 
  on 
  the 
  costa, 
  margined 
  with 
  black 
  ; 
  a 
  broad 
  silvery 
  line 
  

   along 
  the 
  internal 
  margin, 
  which 
  is 
  continued 
  as 
  a 
  submarginal 
  oblique 
  straight 
  line, 
  

   dislocated 
  near 
  the 
  middle 
  of 
  the 
  wing, 
  and 
  margined 
  with 
  yellowish-brown 
  with 
  some 
  

   black 
  scales. 
  A 
  marginal 
  series 
  of 
  triangular 
  spots. 
  Fringe 
  dark 
  at 
  the 
  base, 
  spotted 
  

   externally 
  with 
  silver. 
  Beneath, 
  the 
  body 
  is 
  yellowish-brown, 
  as 
  is 
  the 
  front 
  edge 
  of 
  

   the 
  fore 
  wings, 
  which 
  is 
  banded 
  with 
  three 
  dusky 
  patches, 
  the 
  middle 
  of 
  the 
  wing 
  is 
  

   dusky, 
  while 
  the 
  legs 
  are 
  dark 
  externally. 
  It 
  expands 
  a 
  little 
  over 
  one 
  and 
  a 
  quarter 
  

   (1.30) 
  inches. 
  

  

  Eepialus 
  pulclier 
  of 
  Grote 
  is 
  a 
  species 
  which 
  is 
  common 
  in 
  the 
  foot- 
  

   liills 
  and 
  mountains 
  of 
  Colorado 
  during 
  July, 
  August, 
  and 
  September. 
  

   It 
  may 
  jjrove 
  destructive 
  to 
  the 
  hop 
  when 
  cultivated 
  in 
  Colorado. 
  

  

  INJURING 
  THE 
  COTTON-PLANT. 
  

  

  The 
  Cotton 
  Army- 
  Worm, 
  Aletia 
  argillacea 
  Hiibner; 
  Anomis 
  xylina 
  Say 
  (Fig. 
  45). 
  — 
  

   Feeding 
  often 
  in 
  vast 
  numbers 
  upon 
  the 
  leaves 
  of 
  the 
  cotton-plant 
  ; 
  a 
  caterpillar 
  with 
  a 
  

   looping 
  gait, 
  hairy, 
  green, 
  dotted 
  witb 
  black 
  along 
  a 
  subdorsal 
  yellowish 
  line, 
  and 
  with 
  

   black 
  dots 
  beneath, 
  changing 
  to 
  a 
  pale 
  reddish-brown 
  moth. 
  

  

  Although 
  this 
  moth, 
  and 
  especially 
  the 
  caterpillar, 
  are 
  so 
  abundant 
  

   and 
  destructive 
  in 
  the 
  cotton-growing 
  States, 
  there 
  is 
  much 
  that 
  needs 
  

   to 
  be 
  known 
  about 
  its 
  habits 
  and 
  transform- 
  

   ations, 
  as 
  good 
  authorities 
  differ. 
  The 
  follow- 
  

   ing 
  account 
  and 
  illustrations 
  are 
  taken 
  from 
  

   my 
  " 
  Guide 
  to 
  the 
  Study 
  of 
  Insects," 
  with 
  

   some 
  additions 
  from 
  Riley's 
  Second 
  Report 
  I 
  

  

  on 
  the 
  Noxious 
  Insects 
  of 
  Missouri, 
  and 
  Mr. 
  

  

  Grote's 
  account 
  in 
  Smith's 
  Report 
  on 
  the 
  • 
  ,ayiiu^ 
  '''' 
  — 
  ^ 
  ^^k 
  

   Geology 
  of 
  Alabama 
  for 
  1875, 
  p. 
  199. 
  i^^^^^^^^ 
  m^iP 
  

  

  The 
  parent 
  of 
  the 
  cotton- 
  worm 
  is 
  a 
  red- 
  \M^^^JJ^^^^^^P 
  ^^^ 
  

   dish 
  brown 
  moth, 
  with 
  a 
  dark 
  discal 
  oval 
  '^'^■^'-^ 
  

  

  spot 
  centered 
  by 
  two 
  pale 
  dots. 
  She 
  de-FiG. 
  45.— 
  Cotton 
  Army-Worm, 
  

   posits, 
  according 
  to 
  Mr. 
  Glover, 
  a 
  low, 
  Egg, 
  and 
  Moth. 
  

  

  much-flattened, 
  vertically-ribbed 
  egg 
  upon 
  the 
  surface 
  of 
  the 
  leaf. 
  

   " 
  Each 
  female 
  moth 
  deposits 
  from 
  400 
  to 
  600, 
  and, 
  according 
  to 
  the 
  

   late 
  Thomas 
  Affbek, 
  of 
  Brenham, 
  they 
  hatch 
  two 
  days 
  after 
  being 
  

   deposited, 
  if 
  the 
  weather 
  be 
  moist 
  and 
  wariii. 
  The 
  worms 
  at 
  first 
  

   feed 
  upon 
  the 
  parenchyma 
  or 
  soft, 
  fleshy 
  parts 
  of 
  the 
  leaves, 
  but 
  

   afterward 
  devour 
  indifferently, 
  not 
  only 
  any 
  portion 
  of 
  the 
  leaves, 
  but 
  

   also 
  the 
  blossom-bud 
  and 
  blossom, 
  together 
  with 
  the 
  calyx 
  leaves 
  at 
  the 
  

   base 
  of 
  the 
  boll, 
  thus 
  causing 
  the 
  lobes 
  which 
  hold 
  the 
  cotton 
  to 
  fall 
  

   entirely 
  back 
  and 
  allow 
  the 
  cotton 
  to 
  drop 
  at 
  the 
  slightest 
  touch. 
  While 
  

   young 
  these 
  worms 
  readily 
  let 
  themselves 
  down 
  by 
  a 
  web 
  when 
  disturbed, 
  

   but 
  when 
  older 
  they 
  make 
  less 
  use 
  of 
  this 
  web, 
  and 
  jerk 
  themselves 
  

   away 
  to 
  a 
  considerable 
  distance 
  when 
  suddenly 
  touched. 
  They 
  cast 
  

   their 
  skins 
  at 
  five 
  successive 
  periods, 
  and 
  come 
  to 
  their 
  growth 
  in 
  the 
  

   incredibly 
  short 
  space 
  of 
  fifteen 
  or 
  twenty 
  days." 
  

  

  The 
  larva 
  is 
  a 
  looper, 
  four 
  (the 
  two 
  foremost 
  pair) 
  out 
  of 
  the 
  sixteen 
  

   abdominal 
  legs 
  usually 
  present 
  in 
  the 
  family 
  being 
  wanting, 
  so 
  that 
  the 
  

  

  