﻿454 
  Dr. 
  T. 
  A. 
  Chapman's 
  Contributions 
  to 
  

  

  came 
  up 
  to 
  it, 
  rested 
  a 
  fraction 
  of 
  a 
  second, 
  tapped 
  it 
  

   with 
  their 
  antennae, 
  a 
  few 
  waited 
  a 
  second 
  or 
  two, 
  bnt 
  all 
  

   then 
  passed 
  on 
  satisfied 
  ; 
  their 
  questioning 
  may 
  have 
  been 
  

   as 
  to 
  the 
  arrival 
  being 
  a 
  possible 
  stranger 
  and 
  enemy, 
  

   but 
  equally 
  looked 
  hke 
  a 
  welcome 
  home 
  and 
  inquiry 
  as 
  

   to 
  well-being. 
  The 
  next 
  morning, 
  22nd, 
  the 
  four 
  larvae 
  

   are 
  resting 
  in 
  the 
  sides 
  of 
  the 
  nest 
  away 
  from 
  the 
  brood 
  

   as 
  usual, 
  and 
  it 
  is 
  impossible 
  to 
  say 
  which 
  was 
  the 
  one 
  

   returned. 
  

  

  A 
  comparison 
  of 
  the 
  larvae 
  of 
  L. 
  arion, 
  L. 
  olcon 
  and 
  

   L. 
  euphemus 
  in 
  their 
  several 
  instars 
  up 
  to 
  the 
  time 
  of 
  

   entering 
  the 
  ants' 
  nests, 
  brings 
  into 
  strong 
  relief 
  the 
  extra- 
  

   ordinary 
  peculiarity 
  of 
  L. 
  alcon 
  in 
  having 
  only 
  two 
  

   moults 
  and 
  three 
  larval 
  instars. 
  In 
  the 
  first 
  instars 
  they 
  

   are 
  very 
  much 
  aUke. 
  The 
  most 
  obvious 
  differences 
  are 
  

   that 
  in 
  L. 
  euphemus 
  the 
  spiracles 
  are 
  of 
  very 
  large 
  size, 
  

   nearly 
  twice 
  the 
  diameter 
  of 
  the 
  others. 
  The 
  lenticles 
  

   are 
  fewer. 
  The 
  prothoracic 
  plate 
  has, 
  in 
  L. 
  alco?i, 
  the 
  

   usual 
  pair 
  of 
  lenticles 
  large, 
  and 
  on 
  the 
  front 
  margin 
  ; 
  in 
  

   L. 
  arion 
  they 
  are 
  small 
  and 
  a 
  little 
  way 
  from 
  the 
  front, 
  

   and 
  in 
  L. 
  euphemus 
  it 
  is 
  doubtful 
  whether 
  they 
  can 
  be 
  

   said 
  to 
  be 
  present. 
  

  

  In 
  the 
  2nd 
  instar, 
  L. 
  alcou 
  has 
  several 
  pairs 
  of 
  lenticles 
  

   on 
  the 
  prothoracic 
  plate, 
  the 
  others 
  fewer. 
  L. 
  alcon 
  also 
  

   has 
  more 
  lenticles 
  than 
  L. 
  euphemus. 
  L. 
  arion 
  has 
  a 
  

   stronger 
  panoply 
  on 
  the 
  general 
  surface, 
  more 
  lenticles, 
  

   and 
  the 
  "skin-points" 
  are 
  especially 
  large 
  and 
  dark. 
  

   The 
  size 
  of 
  spiracles 
  in 
  L. 
  euphemus 
  is 
  now 
  little 
  different 
  

   from 
  the 
  others. 
  

  

  In 
  the 
  3rd 
  instar 
  L. 
  euphemus 
  has 
  the 
  least 
  elaborated 
  

   armature, 
  the 
  sldn-points 
  are 
  Avell 
  developed, 
  but 
  there 
  

   are 
  very 
  few 
  lenticles, 
  except 
  on 
  the 
  last 
  segments, 
  and 
  

   no 
  stellate 
  hair-bases; 
  on 
  the 
  abdominal 
  segments 
  are 
  

   about 
  twenty 
  black, 
  not 
  long, 
  hairs, 
  to 
  be 
  counted 
  between 
  

   the 
  dorsal 
  line 
  and 
  the 
  spiracle. 
  In 
  L. 
  arion 
  there 
  is 
  an 
  

   abundant 
  armature, 
  far 
  short, 
  of 
  course, 
  of 
  that 
  in 
  the 
  

   next 
  instar, 
  but 
  with 
  very 
  numerous 
  lenticles 
  and 
  hair- 
  

   bases, 
  not 
  easily 
  distinguished 
  from 
  each 
  other, 
  and 
  here 
  

   and 
  there 
  shghtly 
  stellate. 
  In 
  L. 
  alcon 
  the 
  hairs 
  are 
  about 
  

   as 
  numerous 
  as 
  in 
  L. 
  euphemus, 
  but 
  are 
  longer 
  and 
  there 
  

   are 
  a 
  great 
  many 
  lenticles 
  (and 
  hair-bases 
  ?), 
  but 
  these 
  carry 
  

   no 
  abortive 
  hairs, 
  and 
  show 
  no 
  stellation. 
  The 
  armature 
  

   is, 
  in 
  fact, 
  less 
  simple 
  than 
  in 
  L. 
  euphemus, 
  hardly 
  so 
  full 
  

   and 
  developed 
  as 
  in 
  L. 
  arion, 
  very 
  definitely 
  therefore 
  a 
  

  

  