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  PROCEEDINGS 
  OF 
  THE 
  CALIFORNIA 
  

  

  only 
  one 
  being 
  usually 
  found 
  on 
  each 
  plant. 
  From 
  ten 
  larvae 
  taken 
  in 
  May, 
  

   1873, 
  I 
  obtained 
  the 
  following- 
  results 
  : 
  

  

  Changed 
  to 
  chrysalis. 
  May 
  lCth-23d. 
  

  

  Imago, 
  June 
  4tb-13th. 
  

  

  Five 
  ^ 
  , 
  four 
  $ 
  ; 
  one 
  died 
  in 
  chrysalis 
  state. 
  

  

  Chrysalis. 
  Fawn 
  color, 
  very 
  faintly 
  marked 
  with 
  pale 
  brown 
  dots 
  and 
  

   dashes 
  over 
  the 
  entire 
  surface. 
  On 
  the 
  thorax 
  are 
  two 
  raised, 
  shining 
  points, 
  

   and 
  each 
  of 
  the 
  segments, 
  except 
  the 
  two 
  last, 
  possesses 
  a 
  treble 
  row 
  of 
  small, 
  

   shining 
  tubercles. 
  

  

  Phyciodes 
  mijlitla. 
  Edw. 
  

  

  Larva. 
  Head 
  small, 
  bronze 
  black, 
  entirely 
  covered 
  with 
  short 
  black 
  hair. 
  

   Yiewed 
  from 
  above, 
  the 
  whole 
  upper 
  surface 
  is 
  velvety 
  black, 
  each 
  segment 
  

   being 
  provided 
  with 
  six 
  tubercular 
  spines, 
  very 
  hairy 
  to 
  their 
  tip. 
  The 
  lateral 
  

   row 
  of 
  spines 
  is 
  dull 
  ash 
  color, 
  with 
  black 
  hairs, 
  the 
  spines 
  being 
  shorter 
  than 
  

   those 
  of 
  the 
  dorsal 
  region. 
  Feet 
  and 
  prolegs 
  dull 
  ash 
  color, 
  the 
  under 
  side 
  of 
  

   the 
  body 
  with 
  a 
  fleshy 
  tinge. 
  

  

  Length, 
  0.75 
  inch. 
  

  

  Food 
  plants, 
  various 
  species 
  of 
  Carduus. 
  

  

  This 
  species 
  is 
  gregarious 
  in 
  its 
  habits, 
  and 
  terribly 
  destructive 
  to 
  the 
  plant 
  

   on 
  which 
  it 
  may 
  be 
  hatched, 
  in 
  many 
  cases 
  only 
  the 
  nerves 
  of 
  the 
  leaf 
  remain- 
  

   ing. 
  The 
  caterpillars 
  spin 
  a 
  small 
  web, 
  and 
  draw 
  the 
  leaves 
  of 
  the 
  plant 
  

   together. 
  

  

  Chrt/salis, 
  ash 
  color, 
  with 
  a 
  slight 
  metallic 
  reflection. 
  Dorsal 
  region 
  with 
  

   three 
  rows 
  of 
  slightly 
  raised 
  tubercles. 
  Anal 
  extremity 
  much 
  incurved. 
  Out 
  

   of 
  sixteen 
  specimens 
  taken 
  on 
  May 
  8th, 
  three 
  died 
  in 
  larval 
  state, 
  the 
  rest 
  trans- 
  

   formed 
  as 
  follows 
  : 
  

  

  Chrysalis, 
  May 
  26th-June 
  5th. 
  

  

  Imago, 
  June 
  6th-19th. 
  

  

  Ten 
  J 
  , 
  three 
  ? 
  . 
  

  

  Grapta 
  saty7-us. 
  Edw. 
  (Figured 
  in 
  " 
  Edwards' 
  Butterflies 
  of 
  North 
  America.") 
  

  

  "Larva: 
  Head 
  black, 
  angular, 
  bilobed, 
  spiny, 
  and 
  with 
  a 
  spiny 
  tubercle 
  at 
  

   each 
  of 
  the 
  upper 
  angles; 
  color 
  of 
  body 
  black, 
  with 
  a 
  broad 
  greenish 
  white 
  

   dorsal 
  stripe, 
  which 
  on 
  the 
  anterior 
  segments 
  is 
  clouded 
  with 
  black 
  ; 
  on 
  each 
  

   segment, 
  on 
  this 
  stripe, 
  is 
  a 
  fine 
  V-shaped 
  black 
  mark, 
  having 
  its 
  angle 
  at 
  the 
  

   dorsal 
  spine. 
  The 
  spines 
  form 
  seven 
  rows, 
  the 
  dorsal 
  greenish 
  white, 
  wanting 
  

   on 
  the 
  first 
  four 
  segments, 
  the 
  first 
  lateral 
  row 
  of 
  same 
  color, 
  present 
  on 
  all 
  seg- 
  

   ments 
  from 
  the 
  second 
  ; 
  the 
  second 
  lateral 
  row 
  black, 
  the 
  third 
  greenish 
  white, 
  

   wanting 
  on 
  the 
  first 
  four 
  and 
  terminal 
  segments, 
  and 
  springing 
  from 
  an 
  infra- 
  

   stigmatal 
  line 
  of 
  the 
  same 
  color 
  ; 
  and 
  the 
  spines 
  are 
  thinly 
  covered 
  with 
  short, 
  

   bristling, 
  concolored 
  hairs, 
  except 
  that 
  those 
  near 
  the 
  tips 
  of 
  the 
  white 
  spines 
  

   are 
  blackish." 
  — 
  R. 
  H. 
  Stretch. 
  

  

  Food-plant, 
  Urtica 
  sp. 
  (Stinging 
  Nettle.) 
  

  

  