﻿370 
  BRITISH 
  LEPIDOPTERA. 
  

  

  usual, 
  iii, 
  in 
  front 
  and 
  the 
  larger; 
  v, 
  a 
  large 
  single 
  seta 
  beJow 
  them, 
  and 
  

   vii, 
  a 
  twin-haired 
  plate. 
  I 
  cannot 
  trace 
  any 
  spicular 
  growth 
  (Bacot. 
  

   July 
  11th, 
  1904). 
  Second 
  instar 
  (before 
  hybernation) 
  : 
  In 
  length 
  the 
  

   larva 
  is 
  nearly 
  2nim., 
  stout, 
  and, 
  magnified, 
  has 
  a 
  very 
  great 
  resemblance 
  

   to 
  the 
  fullfed 
  larva 
  of 
  Platyptilia 
  gonad 
  actyla 
  in 
  form, 
  and 
  especially 
  

   in 
  colour 
  and 
  marking, 
  having 
  a 
  pink 
  dorsal 
  line, 
  and 
  a 
  subdorsal 
  extend- 
  

   ing 
  downwards 
  to 
  the 
  supraspiracular 
  network 
  of 
  pink, 
  in 
  a 
  definite 
  

   pattern. 
  The 
  tubercles 
  have 
  each 
  one 
  hair 
  (about 
  \ 
  the 
  diameter 
  of 
  the 
  

   larva 
  in 
  length), 
  viz., 
  on 
  i, 
  ii, 
  iii, 
  iv, 
  v, 
  vi 
  (half-way 
  from 
  iv 
  to 
  prolegs, 
  

   and 
  rather 
  to 
  the 
  back 
  of 
  the 
  segment) 
  ; 
  three 
  hairs 
  at 
  the 
  base 
  of 
  the 
  

   prolegs 
  (? 
  vii) 
  placed 
  triangularly, 
  not 
  in 
  a 
  row. 
  The 
  head 
  is 
  black, 
  

   and 
  the 
  prothoracic 
  and 
  anal 
  plates 
  are 
  very 
  dark. 
  The 
  red 
  marks 
  

   are 
  hardly 
  present 
  on 
  the 
  thorax, 
  but 
  are 
  bright 
  on 
  all 
  the 
  abdominal 
  

   segments 
  (August 
  27th, 
  1904). 
  Third 
  instar: 
  3mm. 
  long 
  (feeding 
  

   externally 
  on 
  stamens 
  and 
  petals 
  of 
  flowers) 
  ; 
  tubercles 
  i 
  and 
  ii 
  well 
  

   separated 
  ; 
  i 
  carries 
  one 
  long, 
  white, 
  slightly-clubbed, 
  hair, 
  and 
  two 
  

   short, 
  black, 
  clubbed 
  secondaries 
  on 
  its 
  inner 
  side 
  ; 
  outside 
  is 
  another 
  

   secondary 
  hair, 
  sometimes 
  black, 
  sometimes 
  white, 
  and 
  another 
  

   longer 
  one, 
  the 
  origin 
  of 
  which 
  gives 
  the 
  idea 
  of 
  its 
  being 
  rather 
  a 
  

   subsidiary 
  tubercle 
  than 
  an 
  appendage 
  to 
  i 
  ; 
  ii 
  is 
  constructed 
  

   similarly, 
  so 
  as 
  also 
  to 
  look 
  like 
  two 
  conjoined 
  tubercles 
  ; 
  it 
  has 
  a 
  

   second 
  white 
  hair 
  outside 
  and 
  behind 
  the 
  first, 
  and 
  two 
  black 
  hairs 
  on 
  

   the 
  inner 
  margin, 
  sometimes 
  also 
  a 
  third. 
  There 
  are 
  similar 
  black 
  

   secondary 
  hairs 
  arising 
  from 
  the 
  skin-surface 
  by 
  the 
  dorsal 
  line, 
  three 
  

   in 
  the 
  middle 
  line, 
  and 
  two, 
  paired, 
  behind; 
  there 
  are 
  also 
  white 
  

   secondary 
  hairs, 
  like 
  the 
  black, 
  except 
  in 
  colour, 
  two 
  or 
  three 
  on 
  

   either 
  side 
  in 
  front 
  of 
  i. 
  The 
  disposition 
  of 
  these 
  secondary 
  hairs 
  

   differs 
  much 
  on 
  different 
  segments, 
  and 
  on 
  opposite 
  sides 
  of 
  the 
  same 
  

   segment. 
  [I 
  am 
  examining 
  this 
  larva 
  as 
  it 
  lies 
  with 
  its 
  head 
  buried 
  in 
  a 
  

   flower-bud 
  of 
  T\ 
  chamaedrys, 
  and 
  observe 
  that 
  the 
  margin 
  of 
  the 
  calyx 
  has 
  

   a 
  row 
  of 
  hairs 
  which 
  are 
  identical, 
  even 
  to 
  minute 
  details, 
  with 
  the 
  primary 
  

   hairs 
  of 
  the 
  larva 
  ; 
  their 
  length 
  is 
  identical, 
  they 
  are 
  a 
  little 
  thick 
  and 
  

   colourless, 
  but 
  this 
  gives 
  them 
  exactly 
  the 
  same 
  value 
  as 
  the 
  more 
  

   slender 
  white 
  hairs 
  of 
  the 
  larva 
  ; 
  they 
  are 
  somewhat 
  knobbed, 
  or 
  

   clubbed, 
  at 
  the 
  extremity, 
  and 
  they 
  spring 
  from 
  a 
  raised, 
  coloured, 
  

   disc, 
  which 
  is 
  very 
  like 
  the 
  tubercular 
  base 
  of 
  the 
  larval 
  hairs.] 
  

   Tubercle 
  iii 
  is 
  a 
  large 
  boss 
  with 
  one 
  long 
  white 
  hair, 
  two 
  black 
  

   secondaries 
  behind, 
  and 
  often 
  another 
  above, 
  in 
  front, 
  or 
  with 
  the 
  

   other 
  two. 
  Directly 
  behind 
  the 
  spiracle, 
  on 
  the 
  2nd 
  subsegment, 
  is 
  a 
  

   small 
  tubercle 
  with 
  one 
  long 
  white 
  hair 
  (shorter 
  than 
  those 
  on 
  i, 
  ii, 
  

   and 
  iii), 
  and 
  one 
  or 
  two 
  black 
  hairs 
  ; 
  iv 
  + 
  v, 
  directly 
  below 
  the 
  

   spiracle, 
  have 
  two 
  long 
  primary 
  hairs, 
  the 
  front 
  one 
  rather 
  higher, 
  two 
  

   or 
  three 
  secondary 
  ones 
  above 
  and 
  behind 
  ; 
  this 
  is 
  on 
  the 
  flange 
  ; 
  some 
  

   way 
  below 
  is 
  a 
  tubercle 
  (vi) 
  with 
  one 
  solitary 
  long 
  hair 
  (no 
  

   secondaries), 
  and 
  then 
  the 
  three 
  hairs 
  (vii) 
  at 
  base 
  of 
  prolegs. 
  The 
  

   spiracular 
  region 
  is 
  without 
  secondary 
  hairs, 
  but 
  several 
  occur 
  below 
  r 
  iv 
  

   + 
  v, 
  and 
  others 
  near 
  supplementary 
  tubercle 
  which 
  is 
  towards 
  the 
  

   posterior 
  margin 
  of 
  the 
  surface. 
  The 
  general 
  surface 
  is 
  covered 
  by 
  fine 
  

   black-tipped 
  skin-points. 
  There 
  is 
  a 
  curious 
  bare 
  pit 
  between 
  i 
  and 
  iii. 
  

   The 
  colour 
  is 
  the 
  result 
  of 
  colourless 
  skin 
  over 
  most 
  of 
  the 
  surface, 
  

   the 
  black 
  skin-points, 
  and 
  a 
  brown 
  colour 
  below 
  i 
  and 
  ii 
  dowm 
  the 
  

   dorsum. 
  Head 
  black; 
  prothoracic 
  plate 
  nearly 
  black 
  (Chapman). 
  

   Third 
  instar 
  (fullfed) 
  : 
  Length 
  4mm., 
  width 
  hardly 
  1mm. 
  ; 
  rather 
  

  

  