﻿328 
  

  

  BRITISH 
  LEPIDOPTERA. 
  

  

  segment. 
  The 
  second 
  hairs 
  of 
  tubercles 
  i, 
  ii, 
  and 
  iii, 
  have 
  the 
  appear- 
  

   ance 
  of 
  being 
  rather 
  more 
  strongly 
  developed 
  skin-hairs, 
  as 
  there 
  is 
  no 
  

   raised 
  boss 
  marking 
  the 
  tubercle 
  of 
  the 
  large 
  hair 
  (Chapman, 
  August 
  

   17th, 
  1904). 
  The 
  larva 
  is 
  well-figured 
  by 
  de 
  Vries 
  in 
  Sepp's 
  Neder- 
  

   landsche 
  Insecten, 
  vol. 
  vi., 
  pi. 
  xlv., 
  figs. 
  1 
  and 
  2. 
  Adult 
  (fullgrown) 
  : 
  

   Slightly 
  less 
  than 
  -5in. 
  in 
  length 
  ; 
  of 
  proportionate 
  bulk 
  ; 
  head 
  much 
  

   smaller 
  than 
  the 
  2nd 
  segment 
  (prothorax), 
  the 
  lobes 
  rounded 
  and 
  

   polished 
  ; 
  body 
  cylindrical 
  and 
  uniform, 
  tapering 
  a 
  little 
  posteriorly 
  ; 
  

   segmental 
  divisions 
  fairly 
  defined, 
  and 
  a 
  tuft 
  of 
  several 
  short 
  hairs 
  

   springs 
  from 
  each 
  of 
  the 
  indistinct 
  tubercles 
  (Porritt). 
  The 
  small 
  

   head 
  is 
  blackish-yellow, 
  with 
  two 
  small 
  black 
  spots 
  ; 
  the 
  mandibles 
  

   brown, 
  as 
  also 
  are 
  the 
  legs 
  ; 
  the 
  prolegs 
  on 
  the 
  other 
  hand 
  are 
  of 
  the 
  

   colour 
  of 
  the 
  body. 
  Length 
  when 
  fullgrown 
  4-5 
  lines 
  ; 
  colour 
  yellow- 
  

   green 
  with 
  darker 
  dorsal 
  line, 
  and 
  a 
  lateral 
  line 
  of 
  the 
  same 
  colour, 
  

   but 
  less 
  distinct. 
  The 
  segmental 
  incisions 
  are 
  deep, 
  and 
  short. 
  

   Scattered, 
  light 
  brown, 
  hairs 
  are 
  visible 
  all 
  over 
  (Schmid). 
  

  

  Variation 
  of 
  larva. 
  — 
  The 
  larvae 
  are 
  very 
  variable, 
  not 
  only 
  in 
  

   ground 
  colour, 
  but 
  also 
  in 
  markings 
  ; 
  some 
  have 
  a 
  red 
  dorsal 
  stripe, 
  

   some 
  a 
  pinkish 
  one, 
  others 
  have 
  scarcely 
  any 
  trace 
  of 
  dorsal 
  or 
  other 
  

   longitudinal 
  markings 
  (Tutt). 
  In 
  colour 
  there 
  are 
  two 
  extreme 
  

   varieties 
  among 
  the 
  larvae, 
  which, 
  in 
  the 
  different 
  individuals, 
  vary 
  

   between 
  these 
  forms. 
  These 
  extremes 
  are 
  : 
  — 
  

  

  1. 
  The 
  ground 
  colour 
  a 
  delicate 
  pale 
  green, 
  strongly 
  tinged 
  indeed 
  with 
  

   yellow 
  ; 
  head 
  pale 
  yellowish-green, 
  the 
  mandibles 
  and 
  ocelli 
  brown 
  ; 
  the 
  medio- 
  

   dorsal 
  stripe 
  dark 
  green 
  or 
  purple 
  in 
  different 
  specimens 
  ; 
  the 
  subdorsal 
  stripes 
  

   yellow, 
  and 
  there 
  are 
  two 
  other 
  fine, 
  but 
  very 
  faint, 
  yellow, 
  lines, 
  one 
  above, 
  and 
  

   the 
  other 
  below, 
  the 
  spiracles 
  ; 
  segmental 
  divisions 
  also 
  yellow 
  ; 
  spiracles 
  black, 
  

   very 
  narrowly 
  encircled 
  with 
  white. 
  Ventral 
  surface, 
  legs, 
  and 
  prolegs 
  uniformly 
  

   pale 
  yellowish-green. 
  

  

  2. 
  The 
  ground 
  colour 
  brownish-yellow 
  ; 
  head 
  also 
  brownish-yellow, 
  freckled 
  

   with 
  brown 
  ; 
  mediodorsal 
  stripe 
  broad, 
  bright 
  purple 
  ; 
  subdorsal 
  stripes 
  also 
  broad, 
  

   but 
  of 
  a 
  much 
  less 
  distinct 
  dull 
  pale 
  purple, 
  and 
  having 
  a 
  fine 
  white 
  line 
  running 
  

   through 
  them 
  ; 
  a 
  narrow 
  purple 
  line, 
  edged 
  with 
  white, 
  extends 
  along 
  the 
  spiracular 
  

   region. 
  A 
  7 
  entral 
  surface, 
  legs, 
  and 
  prolegs 
  uniformly 
  pale 
  yellowish-brown 
  (Porritt). 
  

  

  Jeffrey 
  describes 
  the 
  larva 
  as 
  " 
  dull 
  dark 
  green, 
  and 
  more 
  sparingly 
  

   clothed 
  with 
  hairs 
  than 
  is 
  usual 
  in 
  plume 
  larvae." 
  Gregson 
  notes 
  it 
  

   as 
  " 
  light, 
  yellowish 
  -green, 
  semi-transparent, 
  with 
  a 
  very 
  narrow, 
  

   claret-coloured, 
  dorsal 
  line, 
  commencing 
  on 
  the 
  mesothorax 
  and 
  dying 
  

   away 
  as 
  it 
  approaches 
  the 
  anal 
  segment 
  ; 
  the 
  subdorsal 
  and 
  spiracular 
  

   lines 
  not 
  visible 
  in 
  some 
  specimens, 
  in 
  others 
  faintly 
  noticeable 
  as 
  

   light 
  lines." 
  

  

  Foodplants. 
  — 
  Erythraea 
  centaurium 
  (Schmid), 
  E. 
  pidchella, 
  E. 
  

   littoralu 
  (Lambillion), 
  Chlora 
  perfoliate! 
  (Henslow), 
  Gentiana 
  germanica 
  

   (Schmid 
  and 
  Hofmann). 
  

  

  Parasites. 
  — 
  From 
  the 
  few 
  larvae 
  retained 
  in 
  1904, 
  one 
  or 
  

   two 
  parasites 
  were 
  bred. 
  Of 
  a 
  $ 
  sent 
  to 
  Morley 
  for 
  report, 
  

   the 
  latter 
  notes 
  : 
  " 
  The 
  single 
  $ 
  Apanteles 
  received, 
  and 
  bred 
  from 
  

   A. 
  zophodactylus, 
  appears 
  to 
  be 
  (probably) 
  the 
  undescribed 
  $ 
  of 
  

   Apanteles 
  contaminatns, 
  Hal., 
  but 
  I 
  cannot 
  be 
  sure 
  of 
  this 
  in 
  the 
  absence 
  

   of 
  the 
  ? 
  , 
  which 
  has 
  been 
  bred 
  in 
  England 
  from 
  an 
  undetermined 
  

   larva, 
  mining 
  the 
  leaves 
  of 
  Arctostaphylos 
  itva-ursi 
  " 
  (Bankes). 
  

  

  Pupation. 
  — 
  The 
  fullfed 
  larva 
  spins 
  a 
  silken 
  pad, 
  generally 
  selecting 
  

   a 
  stalk 
  of 
  the 
  foodplant 
  to 
  which 
  it 
  attaches 
  itself 
  in 
  the 
  ordinary 
  

   Alucitid 
  position, 
  and 
  then 
  pupates 
  usually 
  head 
  downwards 
  (Tutt). 
  

  

  