﻿170 
  BRITISH 
  LEPIDOPTERA. 
  

  

  two 
  hairs 
  rather 
  near 
  together, 
  but 
  on 
  separate 
  plates, 
  the 
  anterior 
  the 
  

   higher, 
  vii 
  has 
  three 
  hairs, 
  at 
  base 
  of 
  puolegs, 
  the 
  posterior 
  the 
  largest 
  ; 
  a 
  

   minute 
  hair 
  below 
  prolegs. 
  The 
  abdominal 
  spiracles 
  are 
  nearly 
  as 
  large 
  

   as 
  the 
  thoracic, 
  that 
  of 
  the 
  8th 
  abdominal 
  much 
  larger 
  than 
  the 
  others. 
  

   Anal 
  plate 
  dark 
  with 
  several 
  long 
  hairs. 
  Length 
  of 
  hairs 
  — 
  longest 
  about 
  

   0-3mm. 
  on 
  front 
  and 
  anal 
  segments, 
  on 
  abdomen 
  generally 
  0-lmm. 
  to 
  

   0*15mm., 
  with 
  some 
  shorter. 
  Prolegs 
  with 
  seven 
  to 
  nine 
  crochets, 
  

   claspers 
  with 
  nine 
  ; 
  the 
  prolegs 
  have 
  very 
  short 
  chitinised 
  pedicels. 
  The 
  

   skin-points 
  are 
  extremely 
  fine, 
  black 
  ; 
  there 
  are 
  various 
  small 
  lacunae 
  

   free 
  from 
  them, 
  but 
  nowhere 
  any 
  trace 
  of 
  secondary 
  hairs 
  of 
  any 
  

   sort. 
  The 
  true 
  legs 
  are 
  nearly 
  black, 
  with 
  a 
  fine 
  sharp 
  claw 
  

   and 
  well-chitinised 
  base, 
  and 
  a 
  good 
  many 
  bristles. 
  The 
  general 
  

   colour 
  of 
  the 
  larva 
  is 
  greenish-yellow, 
  with 
  a 
  pink 
  dorsal 
  line, 
  there 
  

   is 
  a 
  pink 
  band 
  between 
  ii 
  and 
  iii, 
  with 
  branches 
  or 
  extensions 
  down 
  

   to 
  below 
  spiracles. 
  The 
  tubercles 
  are 
  black, 
  but 
  all 
  have 
  a 
  pale 
  

   area 
  round 
  them, 
  almost 
  giving 
  a 
  pale 
  subdorsal 
  and 
  lateral 
  line. 
  

   The 
  pink 
  and 
  white 
  below 
  the 
  spiracle 
  merge 
  into 
  the 
  green 
  ground 
  

   colour, 
  which 
  the 
  pink 
  and 
  white 
  above 
  seem 
  rather 
  to 
  overlay 
  than 
  

   replace. 
  The 
  plates 
  on 
  the 
  last 
  segments 
  are 
  nearly 
  black 
  ; 
  the 
  8th 
  

   abdominal 
  has 
  two 
  plates 
  dorsally, 
  each 
  with 
  only 
  one 
  hair 
  (ii 
  ?) 
  and 
  

   behind 
  them 
  a 
  very 
  narrow 
  plate 
  without 
  hair, 
  the 
  9th 
  abdominal 
  has 
  

   a 
  transverse 
  plate, 
  carrying 
  two 
  hairs 
  on 
  each 
  side, 
  and 
  a 
  subsidiary 
  

   plate 
  at 
  each 
  end 
  (each 
  with 
  two 
  hairs), 
  that 
  seem 
  to 
  be 
  attached 
  to 
  

   the 
  central 
  one, 
  making 
  a 
  continuous 
  plate, 
  right 
  across 
  the 
  dorsum. 
  

   The 
  anal 
  plate 
  has 
  seven 
  hairs 
  on 
  each 
  side. 
  [The 
  description 
  of 
  this 
  

   larva 
  may 
  differ 
  a 
  little 
  from 
  that 
  of 
  a 
  feeding 
  example 
  by 
  its 
  being 
  

   so 
  near 
  pupation.] 
  (Chapman, 
  May 
  25th, 
  1904). 
  

  

  Foodplants. 
  — 
  Solidago 
  virgaurea 
  (Wocke), 
  [Senecio 
  sylvaticus 
  

   (Rossler), 
  Senecio 
  nemoreims 
  (Herrich-S 
  chaffer)] 
  . 
  

  

  Puparium. 
  — 
  The 
  only 
  f 
  ullgrown 
  larva 
  ever 
  examined 
  in 
  this 
  country 
  

   used 
  for 
  a 
  puparium 
  the 
  hollow 
  that 
  it 
  had 
  made 
  in 
  the 
  stem 
  of 
  

   Solidago 
  virgaurea, 
  in 
  which 
  it 
  had 
  been 
  feeding, 
  and 
  which 
  was 
  loosely 
  

   augmented 
  by 
  half-a-dozen 
  radical 
  leaves, 
  but 
  it 
  appeared 
  to 
  use 
  no 
  

   silk 
  whatever 
  to 
  hold 
  the 
  almost 
  detached 
  leaves 
  together 
  nor 
  for 
  

   suspension. 
  This 
  example 
  pupated 
  on 
  May 
  26th, 
  1904, 
  and 
  the 
  imago 
  

   emerged 
  in 
  mid- 
  June 
  (Chapman) 
  . 
  [Zeller 
  says 
  that 
  " 
  Fehr 
  found 
  larvas 
  

   in 
  stems 
  of 
  Senecio 
  nemorensis 
  in 
  June. 
  These 
  pupated 
  from 
  July 
  25th, 
  

   the 
  imagines 
  appearing 
  in 
  about 
  three 
  weeks." 
  (It 
  must 
  not 
  be 
  over- 
  

   looked 
  that 
  this 
  is 
  the 
  foodplant 
  of 
  the 
  allied 
  F. 
  nemoralis.)] 
  

  

  Pupa. 
  — 
  The 
  pupa, 
  when 
  first 
  changed, 
  is 
  a 
  vivid 
  green 
  with 
  red 
  

   longitudinal 
  stripes 
  on 
  the 
  abdominal 
  dorsum. 
  ^Yhen 
  mature 
  the 
  

   colour 
  is 
  rufous, 
  with 
  a 
  faintly 
  darker 
  subdorsal 
  line 
  and 
  darker 
  beak. 
  

   The 
  double 
  dorsal 
  flanges, 
  or 
  ridges, 
  are 
  not 
  strongly 
  pronounced, 
  and 
  

   are 
  not 
  differentiated 
  in 
  colouring. 
  On 
  the 
  mesothorax 
  they 
  seem 
  

   rather 
  wide 
  apart, 
  but 
  this 
  may 
  be 
  because 
  they 
  are 
  not 
  so 
  high, 
  e.g., 
  

   as 
  in 
  Gilhneria 
  vallidactyla 
  (bertrami). 
  In 
  some 
  lights, 
  the 
  spiracles 
  

   glisten. 
  The 
  sides 
  of 
  the 
  first 
  three 
  abdominal 
  segments 
  are 
  a 
  little 
  

   paler 
  than 
  the 
  rest 
  of 
  the 
  pupa, 
  with 
  a 
  slight 
  greenish 
  tint. 
  The 
  most 
  

   striking 
  character 
  of 
  the 
  pupa, 
  as 
  compared 
  with 
  those 
  of 
  Platyptilia 
  

   gonodactyla, 
  P. 
  isodactylus, 
  etc., 
  is 
  that 
  the 
  9th 
  and 
  10th 
  abdominal 
  

   segments 
  are 
  very 
  short, 
  so 
  that, 
  instead 
  of 
  the 
  anal 
  end 
  of 
  the 
  pupa 
  

   being 
  conical, 
  in 
  continuation 
  of 
  the 
  tapering 
  of 
  the 
  previous 
  segments, 
  

   the 
  end 
  looks 
  rather 
  abrupt 
  with 
  the 
  crem 
  astral 
  pen 
  rather 
  dorsally 
  

  

  