﻿PLATYPTILIA 
  GONODACTYLA. 
  211 
  

  

  Peers 
  (Ent., 
  ii., 
  p. 
  38), 
  Gregson 
  (Ent., 
  vi., 
  p. 
  426), 
  South 
  (Ent., 
  

   xv., 
  p. 
  32), 
  and 
  Buckler 
  (Larvae, 
  etc., 
  ix., 
  p. 
  347). 
  

  

  Vaeiation 
  of 
  larva. 
  — 
  Examination 
  of 
  a 
  number 
  of 
  fullfed 
  larvae 
  

   collected 
  in 
  Westcombe 
  Park, 
  in 
  late 
  April 
  and 
  early 
  May, 
  1888, 
  led 
  

   to 
  the 
  conclusion 
  that 
  the 
  larvae 
  were 
  exceedingly 
  variable. 
  The 
  ground 
  

   colour 
  varies 
  extremely, 
  and 
  the 
  amount 
  of 
  development 
  of 
  the 
  red 
  

   dorsal 
  and 
  subdorsal 
  lines 
  differs 
  greatly 
  in 
  different 
  specimens 
  ; 
  in 
  

   some, 
  the 
  suffusion 
  was 
  so 
  complete 
  that 
  the 
  whole 
  of 
  the 
  dorsal 
  area 
  

   was 
  red, 
  in 
  others, 
  so 
  faint 
  that 
  the 
  larva 
  was 
  almost 
  unicolorous 
  

   green 
  or 
  whitish, 
  according 
  to 
  the 
  ground 
  colour 
  ; 
  in 
  some 
  specimens, 
  

   the 
  larvae 
  had 
  decidedly 
  brownish, 
  rather 
  than 
  reddish, 
  stripes, 
  in 
  

   others, 
  grey. 
  The 
  different 
  forms 
  noted 
  are 
  : 
  

  

  1. 
  Ground 
  colour 
  grey, 
  with 
  very 
  dark 
  reddish 
  dorsal 
  and 
  subdorsal 
  stripes. 
  

   In 
  some 
  specimens 
  of 
  this 
  form, 
  the 
  colour 
  of 
  the 
  stripes 
  suffuses 
  the 
  whole 
  of 
  the 
  

   dorsal 
  area, 
  while, 
  in 
  others, 
  they 
  exist 
  simply 
  as 
  fine 
  lines, 
  often 
  reduced 
  to 
  a 
  series 
  

   of 
  dots, 
  by 
  the 
  breaking 
  up 
  of 
  the 
  lines 
  in 
  the 
  neighbourhood 
  of 
  the 
  abdominal 
  

   incisions. 
  

  

  2. 
  Ground 
  colour 
  green, 
  with 
  the 
  reddish 
  dorsal 
  and 
  subdorsal 
  stripes, 
  offering 
  

   almost 
  as 
  great 
  differences 
  as 
  in 
  1, 
  both 
  as 
  to 
  depth 
  of 
  colouring 
  and 
  area 
  of 
  

   suffusion. 
  

  

  3. 
  Ground 
  colour 
  whitish, 
  with 
  very 
  faint 
  reddish 
  stripes, 
  sometimes 
  only 
  a 
  

   faint 
  reddish 
  tinge 
  in 
  the 
  dorsal 
  and 
  subdorsal 
  areas. 
  

  

  4. 
  Ground 
  colour 
  whitish, 
  with 
  indistinct, 
  grey, 
  narrow, 
  dorsal 
  and 
  subdorsal 
  

   stripes, 
  in 
  fact, 
  almost 
  unicolorous. 
  

  

  Some 
  larvae 
  of 
  the 
  2nd 
  brood, 
  reared 
  in 
  July-August, 
  1888, 
  appeared 
  

   to 
  vary 
  less, 
  and 
  to 
  be 
  on 
  the 
  whole, 
  much 
  paler 
  than 
  those 
  of 
  the 
  

   spring 
  brood. 
  Chapman 
  notes 
  (in 
  litt.) 
  of 
  larvae 
  collected 
  on 
  the 
  shores 
  

   of 
  Lac 
  Bourget, 
  in 
  March, 
  1903, 
  that 
  the 
  general 
  colours 
  were 
  pink 
  

   and 
  white; 
  taking 
  the 
  pink 
  as 
  ground 
  colour, 
  there 
  is, 
  he 
  says, 
  "a 
  broad 
  

   subdorsal 
  whitish 
  band 
  on 
  line 
  of 
  ii, 
  and 
  again 
  another 
  below 
  spiracle. 
  

   There 
  are 
  whitish 
  markings 
  in 
  the 
  pink 
  dorsally, 
  and 
  again, 
  especially 
  at 
  

   level 
  of 
  iii, 
  where 
  it 
  may 
  be 
  described 
  as 
  an 
  abortive 
  or 
  interrupted 
  white 
  

   band. 
  Beneath 
  it 
  is 
  chiefly 
  pink. 
  Tubercles 
  simple, 
  black, 
  with 
  

   short 
  hairs, 
  general 
  surface 
  clothed 
  with 
  very 
  short 
  black 
  hair, 
  invisible 
  

   without 
  a 
  lens. 
  The 
  amount 
  of 
  pink 
  varies, 
  so 
  that, 
  in 
  some 
  instances, 
  

   it 
  would 
  be 
  more 
  correct 
  to 
  describe 
  the 
  larva 
  as 
  greenish 
  -yellow 
  with 
  

   broad, 
  pink, 
  dorsal 
  band 
  (extending 
  to 
  i), 
  a 
  subdorsal 
  band 
  between, 
  but 
  

   not 
  including 
  either, 
  ii 
  or 
  iii, 
  and 
  a 
  spiracular 
  one, 
  all 
  with 
  irregular 
  

   margins, 
  and 
  including 
  paler 
  and 
  ground 
  colour 
  marblings." 
  The 
  

   differences 
  in 
  individual 
  descriptions 
  are 
  considerable, 
  as 
  may 
  be 
  

   expected. 
  Bankes 
  notes 
  the 
  discrepancy 
  referred 
  to 
  by 
  South 
  (Entom., 
  

   xv., 
  p. 
  32), 
  between 
  his 
  description 
  of 
  the 
  larva 
  (loc. 
  cit.), 
  and 
  that 
  by 
  

   Peers 
  (Entom., 
  ii., 
  38), 
  in 
  which 
  South 
  mentions, 
  besides 
  the 
  dorsal 
  

   line, 
  two 
  others, 
  viz., 
  a 
  "subdorsal 
  stripe" 
  and 
  "spiracle 
  line," 
  whereas 
  

   Peers 
  only 
  refers 
  to 
  one 
  other, 
  viz., 
  a 
  "subdorsal 
  line." 
  He 
  says 
  that, 
  " 
  in 
  

   that, 
  Peers 
  doubtless 
  included 
  in 
  his 
  term 
  ' 
  subdorsal 
  line.' 
  the 
  two 
  lines 
  

   distinguished 
  by 
  South 
  as 
  'subdorsal' 
  and 
  -spiracle' 
  respectively; 
  

   these 
  two 
  lines 
  might 
  easily 
  be 
  regarded 
  as 
  one 
  broad 
  line, 
  much 
  

   interrupted 
  down 
  the 
  centre, 
  for 
  their 
  inner 
  margins 
  are 
  by 
  no 
  means 
  

   well-defined, 
  and 
  they 
  appear 
  to 
  unite 
  here 
  and 
  there. 
  Unless 
  Peers 
  

   had 
  regarded 
  these 
  two 
  as 
  one 
  line, 
  it 
  is 
  inconceivable 
  that 
  he 
  should 
  

   have 
  made 
  no 
  mention 
  of 
  what 
  South 
  calls 
  the 
  ' 
  spiracle 
  line.' 
  ' 
  

  

  FoODPLANTS. 
  — 
  Tussilago 
  farfara 
  (Bower), 
  V. 
  nivea, 
  T. 
  alba 
  (Zeller), 
  

   / 
  } 
  fttasitis 
  (Sorhagen). 
  

  

  