﻿260 
  

  

  BRITISH 
  LEPIDOPTERA. 
  

  

  the 
  rose, 
  is 
  not 
  determinable. 
  On 
  the 
  prothorax, 
  the 
  posterior 
  sub- 
  

   segment 
  (behind 
  the 
  plate) 
  has 
  tubercles 
  placed 
  as 
  i, 
  ii 
  and 
  iii 
  ; 
  on 
  

   the 
  mesothorax 
  and 
  metathorax 
  the 
  three 
  upper 
  tubercles 
  have 
  each 
  

   two 
  hairs, 
  placed 
  — 
  on 
  the 
  upper 
  transversely, 
  on 
  the 
  next 
  nearly 
  

   level, 
  the 
  front 
  one 
  rather 
  higher 
  ; 
  the 
  third 
  also 
  has 
  them 
  one 
  in 
  

   front 
  of 
  the 
  other. 
  The 
  abdominal 
  prolegs 
  are 
  on 
  slender 
  props, 
  and 
  

   have 
  8 
  well-curved 
  brown 
  hooks, 
  the 
  anal 
  prolegs 
  have 
  9. 
  The 
  

   true 
  legs 
  are 
  faintly 
  tinged 
  with 
  brownish, 
  although 
  substantially 
  

   of 
  the 
  same 
  colour 
  as 
  larva. 
  The 
  general 
  surface 
  has 
  very 
  fine 
  raised 
  

   colourless 
  points 
  (Chapman, 
  June 
  14th, 
  1899). 
  Final 
  instar: 
  Of 
  a 
  

   dark 
  sickly 
  green 
  tint, 
  becoming 
  yellower 
  posteriorly, 
  and 
  with 
  a 
  

   marked 
  yellow 
  patch 
  (ovaries, 
  etc.) 
  on 
  the 
  4th 
  and 
  5th 
  abdominal 
  

   segments, 
  and 
  a 
  purple-red, 
  or 
  rich 
  brown, 
  dorsal 
  band, 
  edged 
  with 
  a 
  

   yellow 
  line, 
  broadest 
  in 
  front, 
  narrowing 
  over 
  the 
  4th 
  and 
  5th 
  abdo- 
  

   minal 
  segments, 
  and 
  but 
  little 
  broader 
  posteriorly 
  to 
  this. 
  Head 
  

   yellow, 
  or 
  yellow 
  with 
  black 
  patches 
  dorsally 
  and 
  near 
  mouth, 
  with 
  

   other 
  similar 
  variation. 
  The 
  whole 
  combination 
  gives 
  an 
  impression 
  

   of 
  debility 
  and 
  decomposition, 
  perhaps 
  corresponding 
  closely 
  with 
  a 
  

   bud 
  of 
  foodplant 
  dying 
  off, 
  as 
  secondary 
  ones 
  often 
  do, 
  giving 
  reddish 
  

   and 
  sickly 
  yellow 
  tints 
  combined 
  with 
  green. 
  The 
  whole 
  larva 
  is 
  

   covered 
  with 
  secondary 
  hairs 
  ; 
  these 
  are 
  very 
  short 
  and 
  yellow, 
  the 
  

   primary 
  hairs 
  are 
  long, 
  single 
  (one 
  to 
  each 
  tubercle), 
  whitish, 
  or 
  tinted 
  

   darker 
  apically. 
  Tubercles 
  i 
  and 
  ii 
  are 
  wide 
  apart 
  ; 
  the 
  setae 
  on 
  i 
  and 
  

   iii 
  porrect 
  ; 
  on 
  ii, 
  slightly 
  backwards 
  ; 
  iv 
  and 
  v 
  on 
  flange, 
  the 
  setae 
  

   well 
  separate, 
  one 
  directly 
  below 
  spiracle, 
  the 
  other 
  a 
  little 
  higher, 
  and 
  

   in 
  front 
  of 
  it. 
  The 
  seta 
  on 
  tubercle 
  vi, 
  at 
  back 
  of 
  segment, 
  directed 
  

   backwards 
  ; 
  three 
  hairs 
  at 
  base 
  of 
  prolegs. 
  A 
  secondary 
  hair 
  behind 
  

   iii 
  at 
  back 
  of 
  segment 
  is 
  very 
  large 
  and 
  strong, 
  as 
  is 
  another 
  between 
  

   it 
  and 
  iii. 
  The 
  following 
  details 
  of 
  the 
  tubercles 
  and 
  hairs 
  of 
  fullgrown 
  

   larva 
  are 
  to 
  be 
  noted 
  — 
  on 
  the 
  prothorax, 
  the 
  usual 
  six 
  on 
  each 
  side 
  of 
  

   plate; 
  the 
  three 
  front 
  about 
  equal, 
  06mm. 
  long, 
  the 
  central, 
  posterior, 
  

   about 
  07mm., 
  and 
  the 
  two 
  others 
  about 
  0-4mm. 
  ; 
  apparently 
  three 
  

   hairs 
  in 
  prespiracuiar 
  group, 
  0-2mm.-0-4mm. 
  long, 
  not 
  on 
  one 
  plate, 
  

   but 
  without 
  skin-points 
  between 
  them 
  ; 
  two 
  hairs 
  at 
  base 
  of 
  legs. 
  On 
  

   the 
  meso- 
  and 
  metathorax 
  are 
  the 
  usual 
  four 
  pairs 
  of 
  hairs 
  ; 
  the 
  dorsal 
  

   pair 
  trapezoidal, 
  on 
  separate 
  plates, 
  nearly 
  joined 
  on 
  mesothorax, 
  with 
  

   skin-points 
  between 
  on 
  metathorax; 
  the 
  second 
  pair 
  on 
  the 
  same 
  plate 
  

   (reversed 
  trapezoidals) 
  ; 
  third 
  pair 
  with 
  the 
  addition 
  of 
  a 
  third 
  above 
  

   and 
  behind, 
  making 
  an 
  oblique 
  row 
  of 
  three, 
  all 
  on 
  separate 
  bases 
  ; 
  the 
  

   4th 
  pair 
  at 
  base 
  of 
  legs 
  on 
  same 
  plate 
  and 
  at 
  the 
  same 
  level 
  ; 
  the 
  hairs 
  

   rather 
  larger 
  on 
  mesothorax, 
  the 
  1st, 
  04mm., 
  the 
  2nd, 
  l-2mm., 
  the 
  

   3rd, 
  04mm., 
  the 
  4th, 
  1-Omm., 
  the 
  5th 
  and 
  6th, 
  about 
  0'6mm., 
  an 
  

   extra 
  hair 
  about 
  0-4mm., 
  the 
  7th 
  and 
  8th 
  about 
  0-3mm. 
  and 
  0-2mm. 
  

   long. 
  The 
  true 
  legs 
  have 
  the 
  first 
  two 
  joints 
  darkest, 
  and 
  the 
  1st 
  joint 
  

   has 
  a 
  margin 
  of 
  very 
  minute 
  spicules 
  ; 
  the 
  2nd 
  joint 
  has 
  four 
  or 
  five 
  

   long 
  bristles 
  (half 
  as 
  long 
  again 
  as 
  joint) 
  ; 
  the 
  last 
  joint 
  is 
  paler, 
  half 
  as 
  

   long 
  again 
  as 
  either 
  of 
  others 
  (total 
  length 
  of 
  these 
  joints 
  about 
  

   0-45mm.), 
  claw, 
  fine, 
  straight, 
  accompanied 
  by 
  a 
  hair 
  of 
  about 
  equal 
  

   length. 
  On 
  the 
  1st 
  abdominal, 
  the 
  hair 
  representing 
  tubercle 
  i 
  is 
  

   about 
  0-8mm. 
  long, 
  ii 
  about 
  1-Omm. 
  ; 
  they 
  are 
  widely 
  apart, 
  but 
  

   placed 
  in 
  ordinary 
  trapezoidal 
  position 
  ; 
  that 
  on 
  iii 
  is 
  about 
  1-Omm.; 
  

   iv 
  and 
  v 
  rather 
  apart, 
  but 
  apparently 
  with 
  a 
  plate 
  in 
  common, 
  iv 
  lower 
  

   and 
  behind, 
  about 
  1-Omm., 
  and 
  v 
  about 
  0-6mm. 
  in 
  length 
  ; 
  vi 
  is 
  at 
  back 
  of 
  

  

  