﻿the 
  Life 
  History 
  of 
  Lycaena 
  eicphemus. 
  455 
  

  

  3rd 
  insfcar 
  panoply. 
  This 
  is 
  the 
  last 
  iiistar 
  in 
  L. 
  aJcon. 
  

   The 
  4th 
  instar 
  is 
  reached 
  by 
  L. 
  arion 
  and 
  L. 
  euphemus, 
  

   and 
  they 
  are 
  very 
  much 
  ahke 
  at 
  this 
  stage. 
  They 
  have 
  a 
  

   dense 
  coat 
  of 
  stellate 
  hair-bases 
  ; 
  they 
  have 
  on 
  the 
  dorsum 
  

   a 
  long 
  hair 
  on 
  each 
  side 
  and 
  a 
  long 
  one 
  below 
  the 
  spiracle. 
  

   L. 
  euphemus 
  has 
  a 
  second 
  smaller 
  dorsal 
  hair 
  on 
  4th, 
  5th 
  

   and 
  6th 
  abdominal, 
  and 
  has 
  the 
  first 
  abdominal 
  segment 
  

   narrowed 
  and 
  without 
  dorsal 
  hairs. 
  The 
  prothoracic 
  plate 
  

   in 
  L. 
  euphemus 
  has 
  nmcli 
  the 
  form 
  of 
  a 
  boy's 
  kite— 
  a 
  rather 
  

   broad 
  one. 
  In 
  L. 
  arion 
  it 
  is 
  more 
  rounded 
  and 
  shield- 
  

   shaped. 
  In 
  both, 
  on 
  the 
  margins 
  of 
  the 
  segments 
  the 
  

   hair-bases 
  carry 
  minute, 
  hairs, 
  most 
  obvious 
  on 
  the 
  fronts 
  

   of 
  the 
  3rd 
  to 
  the 
  6th 
  abdominal. 
  These 
  are 
  more 
  usually 
  

   hairhke 
  in 
  L. 
  arion, 
  in 
  L. 
  euphemus 
  more 
  frequently 
  thick 
  

   and 
  clubbed. 
  

  

  In 
  the 
  remarkable 
  sohtary 
  instance 
  in 
  which 
  I 
  obtained 
  

   a 
  4th 
  instar 
  specimen 
  of 
  L. 
  alcon, 
  the 
  hairs 
  and 
  lenticles 
  

   are 
  much 
  as 
  in 
  the 
  3rd 
  instar; 
  the 
  lenticles 
  (or 
  hair-bases 
  ?) 
  

   are 
  circular, 
  none 
  stellate, 
  but 
  there 
  are 
  certain 
  minute 
  

   clubbed 
  hairs 
  very 
  like 
  those 
  in 
  the 
  fourth 
  stage 
  of 
  L. 
  

   euphemus 
  and 
  L. 
  arion, 
  and 
  of 
  which 
  there 
  is 
  no 
  trace 
  

   in 
  the 
  third 
  stage 
  of 
  L. 
  alcon. 
  There 
  is 
  a 
  double 
  row 
  of 
  

   these 
  in 
  the 
  incision 
  between 
  the 
  metathorax 
  and 
  the 
  first 
  

   abdominal 
  segment, 
  numbering 
  about 
  forty 
  altogether, 
  

   perhaps 
  a 
  single 
  row 
  along 
  the 
  border 
  of 
  each 
  segment, 
  

   a 
  few 
  others 
  may 
  be 
  found 
  on 
  the 
  mesothorax 
  and 
  on 
  the 
  

   6th 
  and 
  7th 
  abdominal 
  segments. 
  The 
  bases 
  of 
  these 
  are 
  

   smaller 
  than 
  the 
  lenticles, 
  receding 
  from, 
  rather 
  than 
  ap- 
  

   proaching, 
  the 
  stellate 
  form. 
  There 
  may 
  be 
  other 
  points 
  

   that 
  escape 
  me, 
  the 
  specimen 
  being 
  a 
  little 
  immature, 
  

   but 
  these 
  hairs 
  fully 
  indicate 
  that 
  the 
  larva 
  of 
  L. 
  alcon 
  

   retains 
  a 
  memory, 
  weak 
  and 
  indistinct, 
  of 
  a 
  4th 
  instar, 
  

   probably 
  with 
  an 
  armature 
  not 
  unhke 
  that 
  of 
  L. 
  arion 
  and 
  

   L. 
  euphemus. 
  

  

  It 
  may 
  be 
  noted 
  that 
  the 
  enlarged 
  meso- 
  and 
  metathoracic 
  

   segments 
  dorsally 
  in 
  L. 
  euphemus, 
  together 
  with 
  the 
  smaller 
  

   and 
  weaker 
  1st 
  abdominal, 
  present 
  a 
  resemblance 
  to 
  the 
  

   curious 
  attitude 
  we 
  saw 
  in 
  L. 
  arion, 
  and 
  which 
  Mr. 
  Powell 
  

   has 
  seen 
  in 
  L. 
  euphemus, 
  which 
  the 
  larva 
  assumes 
  when 
  

   being 
  carried 
  in 
  by 
  the 
  ants. 
  There 
  is 
  no 
  corresponding 
  

   weak 
  1st 
  abdominal 
  in 
  L. 
  arion, 
  but 
  in 
  L. 
  alcon 
  this 
  seg- 
  

   ment 
  is 
  faintly 
  narrower 
  than 
  the 
  following 
  segment 
  and 
  

   has 
  only 
  about 
  half 
  the 
  number 
  of 
  hairs, 
  about 
  ten 
  instead 
  

   of 
  twenty, 
  across 
  the 
  dorsum 
  between 
  the 
  spiracles. 
  The 
  

  

  