﻿ACADEMY 
  OP 
  SCIENCES. 
  331 
  

  

  Tenth 
  segment, 
  whitish 
  dorsally, 
  olivaceous 
  at 
  the 
  sides. 
  In 
  the 
  white 
  patch 
  

   are 
  some 
  black 
  waved 
  lines, 
  directed 
  posteriorly, 
  and 
  in 
  the 
  olive 
  parts 
  of 
  this 
  

   segment 
  are 
  some 
  four 
  or 
  five 
  metallic 
  blue 
  dots. 
  Eleventh 
  and 
  twelfth, 
  exactly 
  

   alike, 
  olivaceous, 
  with 
  a 
  few 
  paler 
  lines, 
  and 
  two 
  stellar 
  tubercles 
  on 
  each 
  seg- 
  

   ment, 
  between 
  which 
  are 
  about 
  favc 
  metallic 
  blue 
  dots. 
  Thirteenth, 
  olivaceous, 
  

   with 
  paler 
  stripes, 
  and 
  a 
  rough 
  double 
  tubercle 
  on 
  the 
  anal 
  extremity, 
  brown, 
  

   warty, 
  similar 
  in 
  color 
  to 
  the 
  head. 
  The 
  stigmata 
  from 
  5-12 
  are 
  black, 
  with 
  

   whitish 
  center. 
  Above 
  them, 
  on 
  7, 
  8, 
  and 
  10, 
  is 
  a 
  black, 
  velvety, 
  ovate 
  spot, 
  and 
  

   beneath 
  them, 
  commencing 
  at 
  5, 
  and 
  .e.xtending 
  to 
  anal 
  extremity, 
  is 
  a 
  milk- 
  

   white, 
  waved, 
  lateral 
  line. 
  Under 
  side 
  of 
  body, 
  pale 
  greenish-brown, 
  palest 
  near 
  

   the 
  junction 
  of 
  the 
  segments. 
  Feet, 
  brownish, 
  with 
  black 
  rings, 
  and 
  with 
  some 
  

   white 
  bristles 
  springing 
  from 
  their 
  base. 
  Abdominal 
  legs 
  brownish, 
  with 
  very 
  

   minute 
  white 
  tubercles. 
  

  

  Length, 
  1.20 
  inch. 
  

  

  Food 
  plant, 
  willows, 
  and 
  occasionally 
  on 
  oak. 
  

  

  Changed 
  to 
  chrysalis, 
  June 
  12th. 
  Imago 
  emerged, 
  July 
  6th. 
  

  

  Thecla 
  halesus. 
  Bdv. 
  

  

  This 
  magnificent 
  insect, 
  the 
  most 
  showy 
  and 
  the 
  largest 
  of 
  our 
  Theclas, 
  is 
  met 
  

   with 
  occasionally 
  in 
  several 
  localities 
  near 
  San 
  Francisco. 
  The 
  following 
  brief 
  

   description 
  of 
  its 
  early 
  stages 
  is 
  appended 
  : 
  

  

  " 
  Larva. 
  Green, 
  slightly 
  pubescent. 
  Head 
  and 
  scaly 
  feet 
  testaceous. 
  On 
  

   the 
  back 
  there 
  is 
  a 
  small 
  ray, 
  and 
  on 
  the 
  sides, 
  nine 
  oblique 
  bands 
  of 
  obscure 
  

   green. 
  At 
  the 
  base 
  of 
  the 
  feet, 
  a 
  marginal 
  ray 
  of 
  greenish 
  yellow. 
  Feeds 
  on 
  

   Quercus. 
  

  

  " 
  Chrysalis. 
  Russety, 
  pointed 
  with 
  brown." 
  — 
  Boisduval. 
  

  

  Thecla 
  arsace. 
  Bois. 
  

  

  " 
  Larva. 
  Reddish 
  ; 
  back, 
  white 
  from 
  the 
  second 
  to 
  the 
  ninth 
  ring, 
  and 
  divid- 
  

   ed 
  by 
  two 
  parallel, 
  interrupted 
  lines 
  of 
  obscure 
  green. 
  Near 
  the 
  base 
  of 
  the 
  

   feet, 
  there 
  is 
  a 
  marginal 
  ray 
  of 
  the 
  same 
  color, 
  bordered 
  with 
  white 
  below, 
  and 
  

   between 
  that 
  and 
  the 
  dorsal 
  rays, 
  a 
  row 
  of 
  seven 
  or 
  eight 
  oblique 
  streaks. 
  

  

  "Chrysalis. 
  Reddish 
  before, 
  and 
  the 
  wing 
  envelopes 
  greenish." 
  — 
  Boisduvai-. 
  

  

  Found, 
  though 
  rarely, 
  in 
  Vancouver 
  Island. 
  

  

  Thecla 
  mopsus. 
  Hubn. 
  

  

  " 
  Larva. 
  Greenish, 
  with 
  the 
  back 
  a 
  little 
  more 
  whitish. 
  The 
  anterior 
  and 
  

   dorsal 
  part 
  has 
  a 
  brown 
  quadrangular 
  space, 
  bifid 
  behind, 
  and 
  marked 
  with 
  four 
  

   white 
  spots. 
  The 
  three 
  hind 
  rings 
  have 
  a 
  wide 
  white 
  border, 
  edged 
  with 
  brown. 
  

   Head 
  and 
  feet 
  brownish. 
  Feeds 
  on 
  Eupalorium 
  coelcslinum 
  . 
  

  

  "Cliryia'is. 
  Grayish-brown, 
  with 
  a 
  row 
  of 
  yellow, 
  ferruginous 
  points 
  on 
  the 
  

   sides." 
  — 
  Boisduval. 
  

  

  