﻿460 
  Dr. 
  T. 
  A. 
  Chapman's 
  Contributions 
  to 
  

  

  small 
  hairs. 
  In 
  the 
  3rd 
  instar 
  each 
  set 
  has 
  two 
  large 
  and 
  

   three 
  small 
  hooks, 
  but 
  with 
  a 
  little 
  variation. 
  The 
  claspers 
  

   have 
  three 
  hooks 
  ; 
  one 
  or 
  two 
  may 
  be 
  large. 
  

  

  In 
  the 
  last 
  instar 
  there 
  is 
  considerable 
  variation 
  in 
  the 
  

   hooks 
  of 
  the 
  prolegs 
  — 
  a 
  usual 
  formula 
  is 
  two 
  long, 
  two 
  

   medium, 
  and 
  five 
  short; 
  there 
  may 
  be 
  four 
  long, 
  and 
  it 
  

   may 
  be 
  difficult 
  as 
  to 
  several 
  hooks 
  to 
  say 
  whether 
  they 
  are 
  

   long 
  or 
  short 
  ; 
  eleven 
  seems 
  a 
  usual 
  total 
  number. 
  The 
  

   column 
  of 
  the 
  proleg 
  has 
  a 
  covering 
  of 
  very 
  short 
  hairs 
  with 
  

   conical 
  bases. 
  The 
  marginal 
  group 
  above 
  this 
  has 
  twelve 
  

   to 
  fifteen 
  similar 
  short 
  hairs, 
  as 
  well 
  as 
  stellate 
  lenticles 
  or 
  

   bases. 
  

  

  The 
  4th 
  stage 
  larva 
  has 
  the 
  first 
  six 
  abdominal 
  segments 
  

   with 
  a 
  dorsal 
  surface, 
  raised 
  a 
  little 
  at 
  each 
  side, 
  but 
  with 
  

   a 
  deep 
  recess 
  in 
  the 
  middle 
  line 
  at 
  its 
  anterior 
  margin. 
  This 
  

   recess 
  has 
  stellate 
  hair-bases 
  at 
  the 
  bottom 
  of 
  the 
  hollow, 
  

   but 
  the 
  sides 
  are 
  nearly 
  free 
  from 
  them. 
  In 
  the 
  3rd 
  instar 
  

   there 
  is 
  no 
  trace 
  of 
  this, 
  but 
  at 
  the 
  posterior 
  margin 
  of 
  the 
  

   segment 
  there 
  is 
  a 
  small 
  shining 
  point 
  as 
  of 
  a 
  chitinous 
  

   plate 
  ; 
  this 
  is 
  almost 
  hidden 
  in 
  the 
  incision 
  ; 
  the 
  mounted 
  

   skin, 
  however, 
  shows 
  no 
  such 
  structure. 
  

  

  In 
  4th 
  stage 
  the 
  hollows 
  in 
  the 
  dorsal 
  line 
  on 
  the 
  2nd 
  and 
  

   3rd 
  thoracic 
  segments 
  are 
  in 
  the 
  middle 
  of 
  the 
  segment 
  and 
  

   not 
  at 
  the 
  anterior 
  margin 
  as 
  on 
  the 
  abdominal. 
  On 
  these 
  

   the 
  saddle 
  behind 
  the 
  depression 
  is 
  lower 
  than 
  on 
  each 
  side, 
  

   giving 
  a 
  dorsal 
  depressed 
  fine, 
  sinking 
  much 
  lower 
  at 
  the 
  

   depressions 
  and 
  incisions. 
  

  

  The 
  following 
  are 
  some 
  of 
  the 
  detailed 
  notes 
  made 
  from 
  

   day 
  to 
  day. 
  

  

  July 
  16. 
  — 
  Mr. 
  Powell 
  found 
  a 
  <^ 
  X. 
  eu'phemus 
  drying 
  its 
  

   wings 
  and, 
  searching 
  below, 
  found 
  a 
  pupa 
  case 
  just 
  over 
  

   a 
  nest 
  of 
  Myrmica 
  ruginodis. 
  The 
  pupa 
  case 
  (sent 
  to 
  me) 
  

   is 
  obviously 
  that 
  of 
  a 
  Lycaena. 
  

  

  July 
  30. 
  — 
  Received 
  from 
  Mr. 
  Powell 
  six 
  heads 
  of 
  Sanguis- 
  

   orba 
  with 
  eggs 
  of 
  L. 
  eujjhemus. 
  The 
  egg 
  is 
  inserted 
  almost 
  

   close 
  to 
  the 
  central 
  stem, 
  between 
  the 
  bracteolesand 
  pedicels 
  ; 
  

   the 
  flower-buds 
  would 
  appear 
  to 
  have 
  grown 
  larger 
  since 
  

   the 
  laying, 
  and 
  are 
  packed 
  together 
  so 
  tightly 
  that 
  it 
  seems 
  

   impossible 
  that 
  the 
  egg 
  could 
  have 
  been 
  placed 
  beneath 
  

   them 
  and 
  got 
  into 
  place 
  except 
  when 
  they 
  were 
  smaller. 
  

   The 
  egg 
  appears 
  to 
  be 
  lightly 
  attached 
  to 
  the 
  base 
  of 
  the 
  

   bracteole 
  by 
  both 
  surfaces, 
  or 
  by 
  one 
  to 
  the 
  pedicel. 
  The 
  

   side 
  of 
  the 
  egg 
  is 
  towards 
  the 
  main 
  stem. 
  

  

  Aug;. 
  22. 
  — 
  Received 
  from 
  Mr. 
  Powell 
  five 
  larvae 
  of 
  

  

  