﻿GILLMERIA 
  PALLID 
  ACTYLA. 
  245 
  

  

  clouded 
  with 
  darker, 
  though 
  the 
  ocelli 
  are 
  still 
  black, 
  and 
  the 
  mandibles 
  

   reddish-brown 
  ; 
  the 
  frontal 
  plate 
  is 
  gradually 
  becoming 
  pale 
  like 
  the 
  

   head, 
  the 
  black 
  being 
  confined 
  to 
  the 
  front 
  in 
  some 
  specimens, 
  in 
  others 
  

   to 
  a 
  black 
  edging, 
  more 
  or 
  less 
  broken 
  all 
  round. 
  Ground 
  colour 
  of 
  the 
  

   ventral 
  area 
  and 
  the 
  prolegs 
  uniformly 
  glaucous-green, 
  the 
  anterior 
  

   legs 
  now 
  ringed 
  with 
  black 
  only. 
  Fullgroivn 
  (about 
  half 
  to 
  five-eighths 
  

   of 
  an 
  inch), 
  the 
  larva 
  has 
  a 
  still 
  paler 
  appearance. 
  Ground 
  colour 
  

   .bright 
  pea-green 
  ; 
  head 
  very 
  pale 
  straw-colour, 
  faintly 
  tinged 
  with 
  

   green 
  ; 
  the 
  large 
  ocelli 
  intensely 
  black, 
  and 
  consequently 
  very 
  conspicu- 
  

   ous; 
  the 
  mandibles 
  reddish-brown 
  ; 
  the 
  frontal 
  and 
  small 
  anal 
  plate 
  of 
  

   the 
  same 
  bright 
  green 
  as 
  the 
  ground 
  colour 
  ; 
  the 
  dark 
  green 
  (slightly 
  

   brownish 
  anteriorly) 
  pulsating 
  dorsal 
  vessel 
  forms 
  the 
  dorsal 
  stripe 
  ; 
  

   between 
  it 
  and 
  the 
  spiracular 
  region 
  are 
  two 
  greyish-white 
  stripes, 
  on 
  

   which 
  the 
  small 
  black 
  tubercular 
  spots 
  may 
  be 
  seen 
  ; 
  below 
  the 
  

   spiracles 
  is 
  a 
  still 
  cleaner 
  and 
  more 
  conspicuous 
  white 
  stripe; 
  spiracles 
  

   black. 
  Ventral 
  surface 
  uniformly 
  of 
  the 
  same 
  bright 
  green 
  as 
  the 
  

   dorsal 
  area 
  ; 
  at 
  the 
  front, 
  and 
  at 
  the 
  base 
  of 
  each 
  anterior 
  leg, 
  is 
  an 
  

   intensely 
  black 
  spot 
  ; 
  the 
  prolegs 
  are 
  finely 
  margined 
  with 
  black. 
  

   It 
  will 
  be 
  seen 
  by 
  comparing 
  this 
  description 
  with 
  that 
  of 
  Buckler's 
  

   description 
  of 
  the 
  larva 
  of 
  G. 
  ochrodactyla 
  (dichrodactylus) 
  (Buckler's 
  

   Larvae, 
  ix., 
  p. 
  338), 
  that 
  both 
  species 
  correspond 
  in 
  having 
  three 
  

   forms 
  of 
  colouring 
  in 
  the 
  different 
  stages 
  of 
  growth, 
  and 
  the 
  resem- 
  

   blance 
  of 
  the 
  adult 
  larvae 
  particularly 
  shows 
  the 
  close 
  relationship 
  of 
  

   the 
  two 
  species, 
  whilst 
  the 
  differences, 
  apart 
  from 
  the 
  foodplants, 
  are 
  

   sufficiently 
  wide 
  to 
  separate 
  them 
  (Porritt). 
  

  

  Foodplants. 
  — 
  Achillea 
  millefolium 
  (Rossler), 
  A. 
  ptarmica 
  (Kalten- 
  

   bach), 
  [Senecio 
  aquaticus 
  (Hodgkinson 
  teste 
  Eales),] 
  Senecio 
  jacobaea 
  

   (Reid), 
  [Artemisia 
  vulgaris 
  (Sorhagen), 
  Artemisia 
  campestris 
  (Walsing- 
  

   ham)] 
  . 
  

  

  Pupation. 
  — 
  The 
  full-grown 
  larva 
  of 
  G. 
  pallidactyla 
  (like 
  that 
  of 
  G. 
  

   ochrodactyla) 
  leaves 
  the 
  shoot 
  in 
  which 
  it 
  has 
  fed, 
  and, 
  forming 
  a 
  

   silken 
  pad, 
  attaches 
  itself 
  for 
  pupation 
  to 
  a 
  stem 
  or 
  other 
  part 
  of 
  the 
  

   plant 
  ; 
  one 
  was 
  found 
  that 
  had 
  pupated 
  in 
  a 
  shoot 
  of 
  yarrow 
  

   (Chapman) 
  ; 
  Porritt 
  also 
  notes 
  that 
  it 
  leaves 
  the 
  shoot 
  in 
  which 
  it 
  

   has 
  fed, 
  and 
  affixes 
  itself 
  by 
  the 
  tail 
  to 
  the 
  outside 
  of 
  the 
  stem 
  or 
  leaf, 
  

   etc. 
  A 
  pupa 
  was 
  found 
  attached 
  to 
  a 
  stem 
  of 
  Galium 
  cerum, 
  growing 
  

   near 
  Achillea 
  millefolium^ 
  on 
  July 
  11th, 
  1899, 
  at 
  Hazeleigh 
  (Raynor) 
  ; 
  a 
  

   pupa 
  fastened 
  to 
  a 
  grass-culm 
  on 
  June 
  8th, 
  1894, 
  at 
  Benfleet 
  (Whittle); 
  

   a 
  pupa 
  found 
  on 
  May 
  26th, 
  1904, 
  spun 
  up, 
  fully 
  exposed, 
  on 
  the 
  

   underside 
  of 
  a 
  young 
  yarrow 
  leaf, 
  attached 
  by 
  the 
  cremaster 
  to 
  a 
  silken 
  

   pad, 
  the 
  head 
  upwards, 
  standing 
  normally 
  close 
  against 
  the 
  midrib, 
  

   except 
  that 
  the 
  head 
  projects 
  slightly; 
  in 
  tint 
  not 
  very 
  unlike 
  that 
  of 
  

   the 
  main 
  rib 
  of 
  the 
  leaf 
  (Ovenden). 
  The 
  larva 
  spins 
  a 
  silken 
  pad, 
  and 
  

   then 
  seems 
  to 
  rest 
  with 
  the 
  head 
  turned 
  inward 
  ventrally 
  ; 
  after 
  being 
  

   fixed 
  in 
  position, 
  it 
  shows 
  the 
  fine 
  and 
  very 
  numerous 
  transverse 
  

   striations 
  (that 
  are 
  frequently 
  so 
  marked 
  a 
  feature 
  of 
  plume 
  pupse) 
  

   through 
  the 
  skin 
  of 
  the 
  dorsal 
  area 
  (Baoot). 
  A 
  pupa, 
  found 
  on 
  a 
  stem 
  

   of 
  Artemisia 
  campestris 
  (no 
  Tanacetum 
  near) 
  (Jordan, 
  l-'nt. 
  3/c 
  Mag. 
  t 
  

   xviii., 
  p. 
  76). 
  The 
  pupa, 
  at 
  first 
  green, 
  later 
  changing 
  to 
  earthy-brown, 
  

   was 
  found 
  suspended 
  freely, 
  without 
  a 
  cocoon, 
  by 
  the 
  anal 
  end, 
  attached 
  

   ,to 
  the 
  surface 
  of 
  a 
  shoot 
  of 
  Achillea 
  ptarmica 
  (Kaltenbach). 
  

  

  Pupa. 
  — 
  The 
  pupa 
  is 
  of 
  a 
  line, 
  delicate, 
  though 
  fairly 
  bright, 
  green 
  

   colour, 
  with 
  finely 
  projecting 
  beak 
  ; 
  the 
  mesothorax 
  somewhat 
  

  

  