﻿ACADEMY 
  OF 
  SCIENCES. 
  163 
  

  

  remarkably 
  common 
  on 
  Angel 
  Island, 
  near 
  Saucelito, 
  and 
  throughout 
  Napa 
  

   and 
  Sonoma 
  Counties. 
  

  

  Papilio 
  Zolicaon. 
  Bdv. 
  

  

  Larva. 
  Head 
  pale 
  bluish 
  green, 
  yellowish 
  in 
  front 
  ; 
  eyes 
  black 
  with 
  two 
  

   black 
  stripes 
  in 
  front, 
  between 
  each 
  of 
  which 
  is 
  a 
  small 
  black 
  spot. 
  Guneral 
  

   color 
  of 
  entire 
  upper 
  surface, 
  pale, 
  but 
  very 
  bright 
  apple-green 
  ; 
  slightly 
  paler 
  

   on 
  the 
  sides. 
  First 
  segment 
  with 
  one 
  transverse 
  black 
  band 
  and 
  the 
  suture 
  

   black, 
  with 
  two 
  small 
  yellow 
  points 
  on 
  each 
  side 
  before 
  the 
  anterior 
  band, 
  plate 
  

   above 
  the 
  horn 
  dusky. 
  Second 
  segment, 
  with 
  broad 
  transverse 
  black 
  baud, 
  

   broadest 
  on 
  the 
  back, 
  with 
  four 
  anterior 
  scallops, 
  and 
  a 
  small 
  yellow 
  dot 
  in 
  

   each 
  scallop, 
  a 
  long, 
  transverse, 
  lateral 
  spot, 
  yellow 
  at 
  the 
  top. 
  Third 
  seg- 
  

   ment 
  similar 
  to 
  second, 
  except 
  that 
  the 
  yellow 
  spots 
  on 
  the 
  transverse 
  band 
  

   are 
  larger. 
  Segments 
  four 
  and 
  five, 
  with 
  transverse 
  black 
  band 
  broken 
  on 
  

   each 
  side 
  by 
  three 
  yellow 
  spots, 
  below 
  which 
  is 
  a 
  rounded 
  black 
  spot. 
  Seg- 
  

   ments 
  si.x 
  to 
  nine 
  inclusive, 
  same 
  as 
  four 
  and 
  five, 
  except 
  that 
  instead 
  of 
  the 
  

   subventral 
  round 
  black 
  spot 
  there 
  are 
  two 
  near 
  the 
  edges 
  of 
  the 
  segments, 
  with 
  

   a 
  third 
  on 
  the 
  outside 
  of 
  each 
  leg. 
  Segments 
  ten 
  and 
  eleven 
  same 
  as 
  four 
  and 
  

   five. 
  Segment 
  twelve 
  with 
  a 
  black 
  anterior 
  transverse 
  line, 
  with 
  two 
  yellow 
  spots 
  

   on 
  the 
  anterior 
  margin, 
  two 
  rounded 
  black 
  dorsal 
  spots, 
  a 
  posterior 
  band, 
  an(S 
  

   a 
  long 
  black 
  lateral 
  spot 
  over 
  the 
  anal 
  feet. 
  Prolegs 
  pale 
  bluish, 
  black 
  aJj, 
  

   tips, 
  with 
  black 
  spot 
  at 
  the 
  base 
  of 
  each. 
  Anal 
  feet 
  dusky. 
  Beneath 
  pale^ 
  

   bluish 
  green, 
  with 
  broken 
  median 
  line 
  of 
  dusky 
  marks, 
  most 
  prominent 
  on, 
  the- 
  

   leg-bearing 
  segments. 
  

  

  Length, 
  2.00 
  inches. 
  Body 
  tapering 
  each 
  way 
  from 
  the 
  fourth 
  segment,, 
  

   when 
  seen 
  from 
  above. 
  Viewed 
  sidewise, 
  the 
  three 
  anterior 
  segments 
  taper 
  to- 
  

   ward 
  the 
  head. 
  I 
  owe 
  the 
  above 
  description 
  to 
  my 
  friend 
  Mr. 
  R. 
  H. 
  Stretch,, 
  

   who 
  has 
  made 
  an 
  admirable 
  figure 
  of 
  the 
  larva. 
  I 
  find, 
  however, 
  that 
  the 
  

   insect 
  is 
  very 
  liable 
  to 
  variations 
  in 
  its 
  larval 
  state 
  ; 
  the 
  transverse 
  bands 
  in- 
  

   many 
  specimens 
  becoming 
  very 
  broad, 
  and 
  the 
  yellow 
  spots 
  obsolete 
  in 
  some 
  of 
  

   the 
  segments, 
  while 
  in 
  others 
  the 
  whole 
  upper 
  surface 
  is 
  pale 
  green, 
  with 
  very 
  

   faint 
  black 
  bands, 
  and 
  the 
  yellow 
  markings 
  considerably 
  larger. 
  The 
  above 
  

   form 
  may, 
  however, 
  be 
  taken 
  as 
  the 
  type. 
  

  

  Food 
  plants. 
  Various 
  .species 
  of 
  Umbelliferce, 
  but 
  particularly 
  Fccniculum 
  

   vulgare. 
  In 
  confinement, 
  the 
  caterpillars 
  will 
  feed 
  readily 
  upon 
  the 
  common 
  

   carrot 
  of 
  the 
  gardens. 
  There 
  appears 
  to 
  be 
  but 
  one 
  brood 
  of 
  this 
  species, 
  the 
  

   larvae 
  being 
  fully 
  fed 
  about 
  the 
  middle 
  of 
  September, 
  and 
  the 
  imago 
  appearing 
  

   in 
  the 
  following 
  May. 
  

  

  Chrymlis. 
  Fawn 
  color, 
  shading 
  into 
  blackish 
  brown 
  at 
  the 
  sides 
  and 
  dorsa 
  

   region, 
  and 
  mottled 
  irregularly 
  underneath 
  with 
  the 
  same 
  color. 
  Head 
  deeply 
  

   notched 
  in 
  front, 
  thus 
  forming 
  two 
  protuberances 
  on 
  the 
  sides 
  in 
  front, 
  these 
  

   being 
  very 
  rough, 
  and 
  intensely 
  black 
  in 
  color. 
  Thorax 
  also 
  with 
  black 
  dorsal 
  

   protuberance, 
  and 
  a 
  lesser 
  one 
  on 
  the 
  sides. 
  On 
  the 
  fifth, 
  sixth, 
  seventh, 
  and 
  

   eighth 
  segments 
  are 
  two 
  small, 
  black 
  points, 
  convergent 
  toward 
  the 
  anal 
  extrem- 
  

   ity. 
  The 
  chrysalis, 
  like 
  the 
  larva, 
  is 
  subject 
  to- 
  great 
  variations, 
  some 
  speci- 
  

  

  