﻿370 
  PROCEEDINGS 
  OF 
  THE 
  CALIFORNIA 
  

  

  nearly 
  every 
  respect 
  with 
  Mr, 
  Stretch's 
  figure 
  and 
  description. 
  The 
  only 
  point 
  

   of 
  difiFerence 
  is 
  the 
  color 
  of 
  the 
  abdomen, 
  which 
  is 
  represented 
  by 
  Mr. 
  Stretch 
  

   as 
  brown. 
  Now, 
  the 
  only 
  specimen 
  known 
  to 
  Mr. 
  S., 
  which 
  was 
  taken 
  by 
  the 
  

   late 
  M. 
  Lorquin, 
  was 
  very 
  old, 
  and 
  the 
  abdomen 
  may 
  have 
  become 
  greasy 
  or 
  

   stained 
  from 
  the 
  ravages 
  of 
  time. 
  The 
  antennae 
  were, 
  I 
  think, 
  also 
  destroyed. 
  

   In 
  all 
  other 
  characters 
  my 
  specimens 
  agree 
  exactly 
  with 
  the 
  plate 
  and 
  text 
  in 
  

   the 
  "Bombycidae 
  of 
  North 
  America." 
  As 
  to 
  H. 
  Jrgentata, 
  there 
  can 
  be 
  little 
  

   or 
  no 
  doubt. 
  The 
  species 
  has 
  long 
  been 
  known, 
  and 
  the 
  caterpillar 
  was 
  found 
  

   by 
  me 
  in 
  the 
  Yosemite 
  Valley 
  some 
  years 
  ago. 
  I 
  have 
  also 
  seen 
  it 
  on 
  different 
  

   occasions 
  at 
  Lake 
  Tahoe, 
  the 
  Dalles, 
  Oregon, 
  and 
  in 
  Vancouver 
  Island, 
  though 
  

   I 
  have 
  never 
  succeeded 
  in 
  rearing 
  it 
  until 
  the 
  present 
  instance. 
  H. 
  Sobrina 
  

   would 
  appear 
  to 
  be 
  a 
  much 
  more 
  rare 
  and 
  local 
  species 
  than 
  its 
  nearest 
  ally. 
  

  

  Pyrrhardia 
  Isabella. 
  Packard. 
  

  

  Larva. 
  Head 
  black, 
  with 
  the 
  mandibles 
  and 
  mouth 
  parts 
  generally 
  yellowish- 
  

   white. 
  Body, 
  entirely 
  slaty-black. 
  Spines, 
  very 
  long, 
  arranged 
  in 
  spreading 
  

   bunches 
  from 
  tubercles. 
  Those 
  of 
  the 
  four 
  anterior 
  segments 
  black, 
  the 
  fifth, 
  

   sixth, 
  seventh, 
  and 
  eighth 
  bright 
  chestnut-brown, 
  with 
  a 
  few 
  scattered 
  black 
  

   hairs, 
  while 
  the 
  remainder 
  are 
  black, 
  similar 
  to 
  those 
  anteriorly. 
  Feet, 
  dirty 
  

   white. 
  Length, 
  1.25 
  inch. 
  

  

  Chrysalis. 
  Enclosed 
  in 
  cocoon 
  spun 
  from 
  hairs 
  of 
  caterpillar, 
  those 
  of 
  the 
  

   anterior 
  segments 
  being 
  so 
  mixed 
  with 
  the 
  others 
  as 
  to 
  give 
  an 
  uniform 
  color 
  

   of 
  dark-brown. 
  

  

  Changed 
  to 
  chrysalis, 
  July 
  15th, 
  Imago, 
  August 
  11th. 
  

  

  Mr, 
  Stretch 
  has 
  raised 
  what 
  appears 
  to 
  be 
  this 
  species 
  from 
  a 
  larva 
  of 
  an 
  

   " 
  uniform 
  grayish-brown." 
  Does 
  this 
  fact 
  not 
  serve 
  to 
  indicate 
  that 
  P. 
  Isabella, 
  

   Pack., 
  and 
  P. 
  Californica, 
  Pack., 
  may 
  be 
  distinct 
  species 
  after 
  all 
  ? 
  

  

  Platysamia 
  ceanotlii. 
  Behr.' 
  

  

  Larva. 
  Pale 
  apple-green, 
  of 
  a 
  very 
  vivid 
  tint 
  throughout, 
  with 
  a 
  slight 
  

   whitish 
  bloom 
  over 
  the 
  whole 
  surface. 
  Head, 
  with 
  some 
  purplish-black 
  streaks 
  

   in 
  front 
  and 
  at 
  the 
  sides. 
  Mouth 
  parts, 
  pale-green, 
  pitchy 
  internally. 
  Second 
  

   segment 
  with 
  four 
  minute 
  black 
  dots, 
  edged 
  with 
  white 
  anteriorly, 
  and 
  two 
  very 
  

   small 
  white 
  mammiform 
  tubercles 
  on 
  the 
  sides. 
  Third, 
  fourth, 
  and 
  fifth 
  seg- 
  

   ments, 
  with 
  long 
  raised 
  protuberances, 
  pale 
  yellow, 
  with 
  a 
  black, 
  swollen 
  band 
  

   in 
  the 
  middle, 
  and 
  each 
  surmounted 
  by 
  six 
  blackish 
  spines. 
  The 
  third 
  segment 
  

   has 
  also 
  four 
  lateral 
  raised 
  white 
  spots. 
  The 
  fourth 
  and 
  fifth 
  segments 
  have 
  two 
  

   mammiform 
  white 
  spots, 
  the 
  lateral 
  ones 
  on 
  these 
  segments 
  becoming 
  merely 
  

   black 
  points. 
  On 
  the 
  sixth 
  segment 
  is 
  a 
  faint 
  white 
  raised 
  spot, 
  in 
  the 
  same 
  po- 
  

   sition 
  as 
  the 
  white 
  swollen 
  tubercles 
  on 
  the 
  preceding 
  segments. 
  Seventh 
  and 
  

   eighth, 
  with 
  only 
  black 
  points 
  laterally. 
  Ninth, 
  tenth, 
  and 
  eleventh, 
  without 
  

   any 
  trace 
  of 
  spots. 
  Twelfth 
  segment 
  bears 
  in 
  the 
  middle 
  a 
  long, 
  raised 
  pro- 
  

   tuberance, 
  yellow, 
  banded 
  with 
  black, 
  exactly 
  similar 
  to 
  those 
  of 
  three, 
  four, 
  and 
  

   five. 
  On 
  this 
  segment 
  there 
  are 
  also 
  two 
  lateral 
  points, 
  white, 
  tipped 
  with 
  

   black. 
  Anal 
  segment 
  with 
  four 
  black 
  dots 
  arranged 
  in 
  a 
  square, 
  and 
  two 
  white 
  

  

  