﻿284 
  

  

  BRITISH 
  LEPIDOPTERA. 
  

  

  dark 
  chocolate-brown, 
  varied 
  only 
  by 
  the 
  white 
  primary, 
  and 
  the 
  whiter 
  

   and 
  black 
  secondary, 
  hairs. 
  The 
  other 
  has 
  a 
  nearly 
  similar 
  ground 
  

   colour 
  of 
  the 
  front 
  segments, 
  but 
  becomes 
  greener 
  backwards, 
  so 
  that 
  

   the 
  latter 
  segments 
  are 
  green, 
  with 
  no 
  reddish 
  tint. 
  This 
  larva 
  has, 
  

   on 
  either 
  side, 
  two 
  longitudinal 
  white 
  lines, 
  fairly 
  white, 
  and 
  verjr 
  

   well-defined, 
  quite 
  linear, 
  but 
  interrupted. 
  The 
  upper 
  is 
  in 
  the 
  line 
  of 
  i 
  

   and 
  ii 
  ; 
  it 
  really 
  only 
  exists 
  in 
  front 
  of 
  i, 
  but 
  the 
  two 
  tubercles 
  of 
  nearly 
  

   the 
  same 
  colour 
  appear 
  to 
  continue 
  it 
  ; 
  the 
  second, 
  similarly, 
  exists 
  only 
  

   in 
  front 
  of 
  iii, 
  but 
  iii, 
  and 
  the 
  secondary 
  tubercle 
  behind 
  it, 
  are 
  of 
  the 
  

   same 
  colour 
  ; 
  below 
  iv 
  and 
  v 
  the 
  green 
  is 
  distinctly 
  pale, 
  and 
  contrasts 
  

   with 
  the 
  darker 
  slightly 
  olive 
  tint 
  above. 
  The 
  dark 
  larva 
  has 
  no 
  trace 
  

   of 
  this, 
  but 
  is 
  of 
  uniform 
  colour 
  above 
  and 
  below. 
  The 
  tubercles 
  are 
  all 
  

   well 
  apart, 
  with 
  one 
  definite, 
  longish, 
  white 
  hair 
  ; 
  the 
  secondary 
  hairs 
  are 
  

   black 
  along 
  the 
  dorsal 
  line, 
  but, 
  with 
  a 
  few 
  exceptions, 
  white 
  elsewhere 
  

   (September 
  6th, 
  1904). 
  These 
  two 
  larvae 
  have 
  very 
  chameleon-like 
  

   properties; 
  looking 
  at 
  them 
  to-day, 
  I 
  cannot 
  say, 
  without 
  a 
  little 
  doubt, 
  

   which 
  is 
  which 
  ; 
  one, 
  which 
  is 
  apparently 
  the 
  green 
  one, 
  is 
  laid 
  up 
  for 
  

   pupation, 
  and 
  is 
  of 
  very 
  diminished 
  bulk, 
  only 
  8mm. 
  long 
  (the 
  other 
  

   10mm. 
  -11mm.). 
  It 
  is 
  bright 
  green, 
  has 
  black 
  markings 
  on 
  anal 
  

   plate, 
  and 
  two 
  subdorsal 
  splashes 
  on 
  preceding 
  segment 
  ; 
  tubercles 
  iii 
  

   are 
  minute 
  black 
  dots, 
  and 
  iv 
  and 
  v 
  are 
  quite 
  obvious 
  black 
  dots. 
  

   The 
  true 
  legs 
  are 
  dark, 
  as 
  are 
  also 
  the 
  dorsal 
  secondary 
  hairs. 
  

   The 
  prothoracic 
  plate 
  has 
  a 
  central 
  black 
  line, 
  and 
  a 
  black 
  spot. 
  

   at 
  either 
  side. 
  The 
  head 
  is 
  green, 
  with 
  black 
  markings 
  radiating 
  

   towards 
  the 
  mouth 
  from 
  margin 
  of 
  epicranium, 
  but, 
  except 
  marginal 
  

   line, 
  not 
  reaching 
  more 
  than 
  one-third 
  to 
  half-way. 
  The 
  other 
  

   larva 
  is 
  nearly 
  as 
  green 
  as 
  the 
  greener 
  was 
  two 
  days 
  ago, 
  but 
  it 
  

   seems 
  more 
  likely 
  that 
  both 
  have 
  become 
  greener, 
  than 
  that 
  the 
  

   greener 
  one 
  of 
  two 
  days 
  ago 
  has 
  remained 
  nearly 
  stationary, 
  and 
  the 
  

   dark 
  one 
  become 
  quite 
  green, 
  the 
  one 
  above 
  noted 
  being 
  decidedly 
  

   more 
  brightly 
  green 
  than 
  the 
  greener 
  was, 
  and 
  without 
  any 
  olive 
  or 
  

   darker 
  tints 
  (or 
  white 
  lines). 
  This 
  second 
  larva 
  still 
  has 
  its 
  head 
  

   buried 
  deep 
  in 
  a 
  calyx, 
  eating 
  seeds. 
  It 
  has 
  a 
  darker 
  green 
  dorsal 
  

   line, 
  and 
  its 
  general 
  tint 
  is 
  darker 
  than 
  the 
  other 
  one 
  ; 
  it 
  has 
  very 
  con- 
  

   spicuous 
  yellow 
  patches 
  (glands) 
  on 
  the 
  dorsum 
  of 
  the 
  5th 
  abdominal. 
  

   The 
  anal 
  plate 
  is 
  not 
  of 
  the 
  same, 
  but 
  of 
  a 
  similar, 
  pattern 
  of 
  black 
  

   markings 
  to 
  that 
  of 
  the 
  other. 
  The 
  prothoracic 
  plate 
  has 
  a 
  black 
  mark 
  at 
  

   each 
  outer 
  angle. 
  The 
  head-pattern 
  also 
  is 
  very 
  nearly, 
  but 
  not 
  quite,, 
  

   identical 
  with 
  that 
  of 
  the 
  other 
  ; 
  the 
  ground 
  colour 
  is 
  brownish-ochreous, 
  

   and 
  shows 
  no 
  white 
  markings. 
  These 
  changes 
  of 
  colour 
  (in 
  two 
  days) 
  

   show 
  of 
  what 
  little 
  value 
  colour 
  is 
  in 
  these 
  plume 
  larvas, 
  and, 
  though 
  

   the 
  markings 
  always 
  follow 
  a 
  similar 
  type, 
  they 
  also 
  vary 
  a 
  good 
  deal 
  

   (September 
  8th, 
  1904). 
  The 
  second 
  larva, 
  though 
  not 
  yet 
  laid 
  up 
  for 
  

   pupation, 
  is 
  now 
  as 
  green 
  as 
  the 
  other 
  (September 
  9th, 
  1904). 
  In 
  the 
  

   last 
  skin, 
  the 
  primary 
  hairs 
  are 
  blunt-ended 
  (not 
  sharp 
  as 
  hitherto), 
  but. 
  

   free 
  from 
  spicules, 
  nor 
  can 
  they 
  be 
  called 
  expanded 
  at 
  the 
  ends. 
  The 
  

   secondary 
  hairs 
  are 
  very 
  numerous 
  (30 
  to 
  40 
  between 
  dorsal 
  line 
  and 
  

   spiracle) 
  ; 
  a 
  large 
  one 
  accompanies 
  i, 
  ii, 
  and 
  iii, 
  tending 
  to 
  make 
  them 
  

   warts, 
  and 
  the 
  postspiracular 
  accessories 
  are 
  generally 
  represented 
  by 
  

   a 
  large 
  secondary 
  hair 
  at 
  the 
  usual 
  site. 
  They 
  are 
  all 
  smooth, 
  but- 
  

   expanded 
  at 
  the 
  ends, 
  and 
  apparently 
  bifid, 
  though 
  this 
  may 
  be 
  an 
  

   optical 
  delusion, 
  and 
  their 
  usual 
  form 
  may 
  be 
  clubbed. 
  There 
  are 
  

   only 
  four 
  (sometimes 
  five) 
  crochets 
  to 
  prolegs 
  (Chapman). 
  Final 
  

  

  