﻿506 
  BRITISH 
  LEPIDOPTERA. 
  

  

  front 
  and 
  back 
  margins 
  of 
  segment, 
  so 
  that 
  they 
  are 
  lost 
  in 
  the 
  

   incisions, 
  when 
  the 
  larva 
  is 
  not 
  stretched. 
  Tubercles 
  i 
  and 
  ii 
  are 
  close 
  

   together, 
  and 
  on 
  a 
  common 
  eminence, 
  and 
  almost 
  conjoined. 
  These,. 
  

   and 
  other 
  tubercles, 
  single-haired. 
  Between 
  i, 
  ii, 
  and 
  hi, 
  is 
  another 
  

   longitudinal, 
  ochreous, 
  line. 
  Round 
  i 
  and 
  ii 
  the 
  surface 
  is 
  smooth 
  and 
  

   porcellanous, 
  but, 
  in 
  front 
  of 
  segment, 
  on 
  each 
  side 
  of 
  dorsum, 
  is 
  an 
  

   area 
  with 
  fine 
  skin-points. 
  Head 
  and 
  spiracles 
  black. 
  The 
  subdorsal 
  

   yellow 
  line 
  (between 
  i, 
  ii, 
  and 
  iii) 
  sends 
  down 
  branches 
  marking 
  off 
  a 
  

   somewhat 
  square 
  white 
  are 
  around 
  iii 
  ; 
  iii 
  is 
  placed 
  slightly 
  backward. 
  

   Of 
  iv 
  + 
  v, 
  the 
  front 
  one 
  (v) 
  is 
  the 
  higher 
  with 
  the 
  shorter 
  hair. 
  Hairs 
  about 
  

   half 
  the 
  diameter 
  of 
  the 
  larva 
  in 
  length. 
  Props 
  of 
  prolegs 
  rather 
  short. 
  

   When 
  at 
  rest, 
  the 
  incisions 
  are 
  deep, 
  and 
  the 
  segments 
  stand 
  out 
  high 
  

   and 
  cushiony, 
  with 
  the 
  elevation 
  of 
  the 
  tubercles 
  — 
  especially 
  i 
  and 
  ii, 
  and 
  

   iv 
  and 
  v 
  — 
  making 
  angular 
  points. 
  Below 
  iv 
  + 
  v 
  is 
  a 
  single 
  hair, 
  and, 
  

   at 
  the 
  base 
  of 
  prolegs, 
  the 
  usual 
  three 
  hairs, 
  which 
  are, 
  however, 
  very 
  

   conspicuous, 
  being 
  black 
  on 
  a 
  white 
  ground. 
  On 
  the 
  1st 
  thoracic, 
  the 
  

   plate 
  is 
  rather 
  dark, 
  divided 
  centrally 
  by 
  a 
  pale, 
  hardly 
  yellow, 
  line, 
  

   with, 
  on 
  either 
  half, 
  a 
  nearly 
  central 
  large 
  hair, 
  a 
  small 
  one 
  at 
  outer 
  

   angle, 
  and 
  three 
  along 
  front 
  edge, 
  a 
  three-haired 
  tubercle 
  in 
  front 
  of 
  

   spiracle, 
  and 
  one 
  at 
  base 
  of 
  leg. 
  The 
  2nd 
  and 
  3rd 
  thoracic 
  segments 
  have, 
  

   on 
  either 
  side, 
  four 
  double 
  tubercles 
  along 
  the 
  middle 
  of 
  the 
  segment, 
  the 
  

   3rd 
  with 
  an 
  extra 
  hair 
  above, 
  and 
  behind, 
  it. 
  The 
  prolegs 
  carry 
  seven 
  

   crochets 
  in 
  a 
  circle, 
  incomplete 
  at 
  its 
  outer 
  margin. 
  The 
  black 
  

   crochets 
  on 
  the 
  pale 
  white 
  base 
  have 
  a 
  very 
  pronounced 
  aspect, 
  

   different 
  from 
  the 
  more 
  usual 
  pale 
  brownish 
  crochets 
  on 
  a 
  yellowish 
  

   base. 
  Antepenultimate 
  instar 
  (May 
  31st, 
  1905 
  — 
  taken 
  wild 
  near 
  

   Esher) 
  : 
  The 
  smallest 
  larva 
  found 
  was 
  just 
  about 
  to 
  moult 
  for 
  the 
  

   last 
  time 
  but 
  one. 
  Its 
  length 
  is 
  4 
  # 
  5mm., 
  and 
  its 
  longest 
  hairs 
  about 
  

   0-5mm. 
  ; 
  its 
  general 
  aspect 
  precisely 
  that 
  of 
  the 
  larger 
  larvae, 
  and 
  the 
  dis- 
  

   position 
  of 
  the 
  primary 
  hairs 
  identical, 
  though 
  these 
  are 
  not 
  so 
  long 
  ; 
  there 
  

   are 
  no 
  secondary 
  hairs, 
  however, 
  to 
  be 
  discovered. 
  * 
  Penultimate 
  instar 
  

   (May 
  31st, 
  1205) 
  : 
  The 
  next 
  smallest 
  larva 
  was 
  about 
  to 
  moult 
  for 
  the 
  

   last 
  time; 
  its 
  length 
  about 
  6mm. 
  ; 
  the 
  longest 
  hairs 
  about 
  0*8mm., 
  and 
  

   there 
  are 
  a 
  good 
  many 
  secondary 
  hairs, 
  two 
  or 
  three 
  round 
  i 
  and 
  ii, 
  one 
  

   behind 
  iii, 
  and 
  one 
  above, 
  and 
  behind, 
  iv 
  and 
  v. 
  These 
  are 
  secondary 
  

   tubercular 
  hairs, 
  not 
  skin-hairs, 
  as 
  are 
  also 
  those 
  of 
  the 
  larva 
  in 
  its 
  last 
  

   skin. 
  Final 
  instar 
  (May 
  31st, 
  1905): 
  The 
  fullgrown 
  larva 
  is 
  7mm. 
  -8mm. 
  

   long, 
  of 
  a 
  form 
  much 
  like 
  that 
  of 
  the 
  larvae 
  of 
  Eucnemidophorus 
  rhododac- 
  

   tyla 
  and 
  Adkinia 
  zophodactyla, 
  thickest 
  about 
  the 
  3rd 
  or 
  4th 
  abdominal 
  

   segments, 
  and 
  tapering 
  to 
  either 
  end, 
  but, 
  when 
  at 
  rest, 
  or 
  feeding, 
  has 
  the 
  

   forward 
  segments 
  rather 
  contracted, 
  so 
  that 
  it 
  looks 
  thickest 
  about 
  the 
  

   metathorax, 
  and 
  the 
  mesothorax 
  seems 
  nearly 
  as 
  large 
  ; 
  in 
  colour, 
  the 
  

   dorsum 
  is 
  red, 
  or 
  reddish-brown, 
  or 
  pink, 
  with 
  an 
  underlying 
  green 
  tone, 
  

   the 
  difference 
  of 
  tint 
  being 
  due 
  rather 
  to 
  the 
  attitude 
  of 
  the 
  larva, 
  and 
  

   the 
  degree 
  to 
  which 
  it 
  is 
  mature, 
  than 
  to 
  individual 
  variation. 
  The 
  

   hairs 
  are 
  very 
  long, 
  and 
  many 
  of 
  them 
  are 
  clubbed, 
  being 
  some- 
  

   what 
  flattened, 
  at 
  the 
  tips 
  especially 
  ; 
  some 
  are 
  dark 
  w 
  T 
  ith 
  white 
  tips, 
  

   which 
  look 
  club-like. 
  The 
  hairs 
  transmit, 
  and 
  reflect, 
  the 
  red 
  of 
  the 
  

   larva 
  and 
  of 
  the 
  hair-glands 
  of 
  the 
  plant, 
  so 
  that 
  the 
  resemblance 
  of 
  

   the 
  larva, 
  in 
  some 
  aspects, 
  to 
  a 
  leaf 
  is 
  very 
  close 
  ; 
  in 
  others, 
  a 
  leaf, 
  seen 
  

  

  * 
  This 
  specimen 
  raises 
  a 
  doubt 
  as 
  to 
  whether 
  the 
  wintering 
  larvae 
  do 
  hot 
  have 
  

   five 
  moults 
  (an 
  extra 
  one 
  on 
  leaving 
  hybernaculum) 
  (Chapman). 
  

  

  