﻿PACKARD.] 
  

  

  THE 
  HOP-VINE 
  CATERPILLAR. 
  

  

  773 
  

  

  when 
  possible, 
  to 
  turn 
  a 
  powerful 
  stream 
  of 
  water 
  upon 
  the 
  leaves, 
  or 
  

   to 
  shower 
  them 
  with 
  soap-suds. 
  So 
  abundant 
  is 
  it 
  in 
  certain 
  years 
  in 
  

   New 
  Egland 
  that 
  the 
  hop-crop 
  has 
  

   almost 
  been 
  cut 
  off. 
  The 
  following 
  

   figure 
  of 
  the 
  apple 
  aphis 
  is 
  intro- 
  

   duced 
  to 
  illustrate 
  the 
  usual 
  form 
  of 
  

   the 
  plant-louse. 
  

  

  The 
  Hop 
  Caterpillar, 
  Hijpena 
  hnmnli 
  

   (Harris). 
  — 
  Devouriug 
  the 
  leaves 
  in 
  June, 
  

   and 
  again 
  in 
  July 
  or 
  August 
  ; 
  active, 
  slen- 
  

   der, 
  glass-green 
  caterpillars, 
  with 
  but 
  four 
  

   false 
  legs 
  and 
  nearly 
  half 
  an 
  inch 
  long. 
  

  

  The 
  following 
  account 
  of 
  this 
  de- 
  Fig. 
  42.— 
  Apple 
  Aphis, 
  natural 
  size 
  and 
  

   struct! 
  ve 
  caterpillar 
  is 
  taken 
  from 
  my 
  enlarged. 
  

  

  "Guide 
  to 
  the 
  Study 
  of 
  Insects." 
  Late 
  in 
  May 
  or 
  in 
  June, 
  as 
  soon 
  as 
  

   the 
  leaves 
  expand, 
  they 
  are 
  often 
  devoured 
  by 
  the 
  caterpillar 
  of 
  a 
  grunt- 
  

   moth, 
  which, 
  on 
  being 
  disturbed 
  is 
  very 
  active, 
  wriggling 
  off 
  the 
  leaf 
  to 
  

   the 
  ground. 
  It 
  is 
  double-brooded, 
  the 
  first 
  lot 
  of 
  caterpillars 
  appearing 
  

   late 
  in 
  May 
  and 
  early 
  in 
  June, 
  the 
  moths 
  flying 
  about 
  late 
  in 
  June 
  and 
  

   early 
  in 
  July. 
  A 
  second 
  brood 
  of 
  caterpillars 
  appear 
  in 
  July 
  and 
  August, 
  

   in 
  Massachusetts, 
  the 
  moth 
  flying 
  in 
  September. 
  When 
  the 
  caterpillar 
  

   is 
  fully 
  grown 
  it 
  forms 
  a 
  loose 
  

  

  silken 
  cocoon 
  within 
  a 
  folded 
  

   leaf 
  or 
  any 
  crevice, 
  the 
  moth 
  ap- 
  

   pearing 
  three 
  weeks 
  after. 
  I 
  

   have 
  raised 
  a 
  species 
  of 
  parasitic 
  

   fly 
  (TacMna) 
  from 
  the 
  chrysali- 
  ^^j,<- 
  ? 
  K^.^^ 
  

  

  des, 
  which 
  probably 
  somewhat 
  Pior 
  43— 
  Hop-vme 
  caterpillar, 
  pupa, 
  and 
  moth, 
  

   reduce 
  the 
  number 
  of 
  the 
  moths. 
  natural 
  size. 
  

  

  Remedies.— 
  Uand-pickiug 
  and 
  shaking 
  the 
  vines 
  vigorously 
  twice 
  a 
  day 
  

   would, 
  if 
  systematically 
  pursued, 
  be 
  sufficient; 
  while, 
  in 
  addition, 
  show- 
  

   ering 
  the 
  leaves 
  with 
  whale-oil 
  soap, 
  or 
  a 
  similar 
  wash, 
  would 
  be 
  effi- 
  

   cacious. 
  

  

  Desa-iption 
  of 
  the 
  caterpiUer. 
  —Bodj 
  long 
  and 
  slender, 
  with 
  the 
  segments 
  rather 
  con- 
  

   vex, 
  and 
  with 
  long, 
  sparse 
  hairs. 
  It 
  is 
  uniformly 
  of 
  a 
  glassy, 
  pea-green 
  color. 
  The 
  

   head 
  is 
  rather 
  large, 
  and 
  deeply 
  divided 
  into 
  two 
  lobes 
  by 
  the 
  median 
  suture 
  ; 
  it 
  is 
  a 
  

   little 
  more 
  yellowish-green 
  than 
  the 
  body, 
  which 
  tapers 
  gradually 
  toward 
  the 
  tail, 
  

   while 
  the 
  last 
  pair 
  of 
  legs 
  are 
  long 
  and 
  slender. 
  As 
  there 
  are 
  but 
  two 
  pairs 
  of 
  abdom- 
  

   inal 
  legs, 
  the 
  caterpillar 
  walks 
  with 
  a 
  looping 
  gait 
  like 
  the 
  span 
  or 
  measuring 
  worms. 
  

   The 
  body 
  is 
  striped 
  with 
  a 
  narrow 
  whitish 
  line, 
  edged 
  broadly 
  below 
  with 
  dusky, 
  and 
  

   with 
  two 
  white 
  lines 
  on 
  the 
  sides 
  of 
  the 
  body, 
  though 
  specimens 
  vary 
  in 
  the 
  number 
  of 
  

   lines, 
  some 
  having 
  no 
  lateral 
  whitish 
  stripes. 
  It 
  is 
  nearly 
  half 
  an 
  inch 
  (0.45) 
  in 
  length. 
  

   When 
  half-grown 
  the 
  caterpillar 
  is 
  of 
  a 
  pale, 
  livid, 
  flesh 
  color, 
  not 
  greenish, 
  with 
  a 
  

   broad, 
  dark, 
  dorsal 
  line, 
  bounded 
  on 
  each 
  side 
  by 
  a 
  whitish 
  line. 
  

  

  Description 
  of 
  the 
  moth.— 
  It 
  has 
  remarkably 
  long 
  feelers 
  (palpi), 
  and 
  when 
  the 
  wings 
  

   are 
  folded 
  is 
  triangular 
  in 
  outlike 
  like 
  the 
  Greek 
  letter 
  A. 
  It 
  is 
  marbled 
  with 
  gray 
  

   beyond 
  the 
  middle 
  of 
  the 
  fore 
  wings, 
  with 
  a 
  distinct 
  oblique 
  gray 
  stripe 
  at 
  the 
  apes 
  ; 
  

   and 
  the 
  fore 
  wings 
  are 
  crossed 
  by 
  two 
  wavy 
  blackish 
  lines 
  formed 
  of 
  elevated 
  black 
  

   tufts, 
  while 
  there 
  are 
  two 
  similar 
  black 
  tufts 
  in 
  the 
  middle 
  of 
  the 
  wings; 
  the 
  hind 
  

   wings 
  are 
  paler 
  than 
  the 
  rest 
  of 
  the 
  moth. 
  It 
  expands 
  one 
  inch 
  and 
  a 
  quarter. 
  

  

  The 
  Hop-Vine 
  Hair-Streak 
  Butterfly, 
  Uranotes 
  melmus 
  {Yi\ibn.) 
  ; 
  TJiecJa 
  himnJi 
  

   Harris.— 
  Frequently 
  feeding 
  on 
  the 
  heads 
  of 
  the 
  hop 
  ; 
  a 
  small, 
  short, 
  thick, 
  green 
  and 
  

   downy 
  caterpillar 
  with 
  very 
  short 
  legs, 
  transforming 
  into 
  a 
  small, 
  delicate, 
  brown 
  but- 
  

   terfly 
  with 
  four 
  linear 
  tails, 
  two 
  on 
  each 
  hind 
  wing. 
  

  

  As 
  I 
  have 
  never 
  seen 
  this 
  caterpillar, 
  my 
  account 
  is 
  taken 
  from 
  that 
  

   of 
  Harris. 
  All 
  he 
  says 
  of 
  the 
  larva 
  is 
  given 
  in 
  the 
  preceding 
  paragraph. 
  

  

  Description 
  of 
  the 
  hutterflij.— 
  The 
  wings 
  on 
  the 
  upper 
  side 
  are 
  dusky 
  brown, 
  with 
  a 
  

   tint 
  of 
  blue-gray 
  ; 
  and, 
  in 
  the 
  males, 
  there 
  is 
  an 
  oval 
  darker 
  spot 
  near 
  the 
  front 
  edge; 
  

  

  