﻿— 
  154 
  — 
  

  

  is 
  distributed 
  from 
  Canada 
  to 
  Florida, 
  and 
  west 
  to 
  Nebraska. 
  The 
  eggs- 
  

   are 
  deposited 
  in 
  large 
  clusters 
  of 
  as 
  many 
  as 
  a 
  hundred 
  and 
  fifty 
  each, 
  

  

  usually 
  on 
  the 
  under 
  surfaces 
  

   of 
  the 
  leaves. 
  The 
  young 
  

   caterpillars 
  are 
  at 
  first 
  white, 
  

   hairy, 
  and 
  speckled, 
  each 
  

   with 
  a 
  black 
  head 
  and 
  a 
  

   black 
  crescent 
  upon 
  the 
  

   thorax. 
  They 
  feed 
  for 
  a 
  

   time 
  in 
  a 
  dense 
  group, 
  but 
  

   after 
  a 
  few 
  days 
  they 
  molt 
  

   and 
  assume 
  the 
  zebra- 
  mark- 
  

   ings 
  of 
  the 
  full 
  grown 
  larva. 
  

   This 
  is 
  black 
  with 
  two 
  yellow 
  

   stripes 
  on 
  each 
  side, 
  the 
  

   broad 
  interval 
  between 
  

   which 
  is 
  crossed 
  by 
  numer- 
  

   ous 
  fine 
  white 
  lines. 
  The 
  

   under 
  surface 
  is 
  tawny. 
  

   When 
  dis4;urbed 
  the 
  caterpillar 
  coils 
  up 
  and 
  falls 
  to 
  the 
  ground. 
  It 
  

   pupates 
  under 
  ground 
  within 
  a 
  rude 
  cocoon. 
  There 
  are 
  two 
  genera- 
  

   tions 
  a 
  year, 
  hibernation 
  being 
  either 
  in 
  the 
  pupal 
  or 
  larval 
  stage. 
  The 
  

   first 
  and 
  most 
  destructive 
  brood 
  of 
  larvse 
  occurs 
  in 
  June 
  and 
  July, 
  and 
  

   the 
  second 
  in 
  vSeptember 
  and 
  October. 
  

  

  Fig. 
  77. 
  The 
  Zebra-caterpillar, 
  .l/«;««i'»'rt 
  picia: 
  it, 
  larva; 
  

   h, 
  adult. 
  (Riley, 
  U. 
  S. 
  Dept. 
  of 
  Agriculture.) 
  

  

  The 
  PURSL.^NE-CATERPILLAR. 
  

  

  Cop 
  i 
  dry 
  as 
  glove 
  ri 
  G. 
  & 
  R. 
  

  

  Fig. 
  78. 
  'I'lie 
  Purslane-caterpillar, 
  Copi- 
  

   dryas 
  glover 
  i: 
  a, 
  adult; 
  b, 
  larva. 
  (Riley 
  ><: 
  

   Howard, 
  U. 
  S. 
  Dept. 
  of 
  Agriculture.) 
  

  

  Fig. 
  79. 
  The 
  Purslane- 
  

   caterpillar, 
  Copidry 
  as 
  

   gloveri, 
  egg, 
  greatly 
  en- 
  

   larged. 
  (Riley 
  & 
  How- 
  

   ard, 
  U. 
  S. 
  Dept. 
  of 
  Agri- 
  

   culture 
  ) 
  

  

  Fig. 
  80. 
  The 
  Purs- 
  

   lane-caterpillar, 
  Copi- 
  

   dry 
  as 
  gloz'eri, 
  with 
  

   head 
  and 
  last 
  seg- 
  

   ments 
  enlarge 
  (.1. 
  

   (Riley 
  and 
  Howard. 
  

   U. 
  S. 
  Dept. 
  of 
  Agri- 
  

   culture.) 
  

  

  This 
  insect, 
  the 
  usual 
  food 
  of 
  which 
  is 
  purslane, 
  is 
  not 
  an 
  Illinois 
  

   species, 
  but 
  as 
  it 
  seems 
  to 
  have 
  spread 
  from 
  its 
  original 
  home 
  in 
  Texas 
  

  

  