﻿AMBLYPTILIA 
  PUNCTIDACTYLA. 
  

  

  307 
  

  

  blunt, 
  and 
  perhaps 
  bifid. 
  The 
  primary 
  hairs 
  are 
  also 
  shorter. 
  On 
  

   the 
  1st 
  abdominal 
  segment 
  their 
  comparative 
  lengths 
  are 
  : 
  — 
  

  

  TUBEECLES. 
  

  

  IN 
  COSMODACTYLA. 
  

  

  IN 
  PUNCTIDACTYLA. 
  

  

  i 
  

  

  0-66 
  

  

  0-64 
  

  

  ii 
  

  

  0-48 
  

  

  0-48 
  

  

  iii 
  

  

  0-70 
  

  

  0-60 
  

  

  iv 
  

  

  0-54 
  

  

  0-38 
  

  

  V 
  

  

  0-51 
  

  

  0-42 
  

  

  This 
  difference, 
  it 
  will 
  be 
  seen, 
  is 
  most 
  pronounced 
  in 
  the 
  lateral, 
  and 
  hardly 
  

   occurs 
  in 
  the 
  dorsal, 
  hairs. 
  In 
  A. 
  imnctidactyla, 
  they 
  also 
  taper 
  more 
  

   rapidly, 
  and 
  so 
  seem 
  to 
  have 
  also 
  sharper 
  points, 
  and 
  are 
  more 
  slender. 
  

   My 
  specimen 
  does 
  not 
  quite 
  agree 
  with 
  Hofmann's 
  statement 
  that 
  

   there 
  are 
  no 
  secondary 
  tubercular 
  hairs. 
  These 
  are 
  present, 
  but 
  are 
  less 
  

   obvious 
  and 
  pronounced 
  than 
  in 
  A. 
  cosmodactyla, 
  and 
  might 
  properly 
  be 
  

   described 
  as 
  absent 
  in 
  i 
  and 
  ii, 
  but 
  iii, 
  especially, 
  has 
  a 
  fairly- 
  developed 
  

   secondary 
  hair, 
  and 
  the 
  postspiracular 
  secondary 
  tubercles 
  are 
  repre- 
  

   sented 
  by 
  some, 
  decidedly 
  stronger, 
  secondary 
  hairs, 
  but 
  less 
  strong 
  

   than 
  in 
  A. 
  cosmodactyla. 
  In 
  Lord 
  Walsingham's 
  collection 
  are 
  two 
  

   larvae 
  from 
  Mr. 
  Porritt 
  labelled 
  " 
  Tpunctidactylus," 
  and 
  these 
  also 
  agree 
  

   with 
  Hofmann's 
  description. 
  The 
  secondary 
  hairs, 
  instead 
  of 
  being 
  of 
  

   varying 
  sizes 
  and 
  with 
  very 
  thickened 
  ends 
  as 
  in 
  A. 
  cosmodactyla, 
  are 
  

   of 
  uniform 
  small 
  size, 
  and 
  the 
  ends, 
  though 
  thickened, 
  are 
  only 
  

   slightly 
  so, 
  and 
  exactly 
  the 
  same 
  on 
  all 
  hairs. 
  There 
  is 
  one 
  larger 
  

   secondary 
  hair 
  in 
  the 
  position 
  of 
  the 
  lower 
  postspiracular 
  accessory. 
  

   Certain 
  of 
  the 
  secondary 
  hairs 
  are 
  attached 
  to 
  the 
  bases 
  of 
  the 
  

   tubercles, 
  but, 
  differing 
  in 
  no 
  way 
  from 
  the 
  others, 
  though 
  they 
  are 
  

   probably 
  secondary 
  tubercular 
  essentially, 
  quite 
  justify 
  Hofmann's 
  

   statement 
  that 
  such 
  hairs 
  are 
  absent, 
  as 
  they 
  may 
  be 
  equally 
  regarded 
  

   as 
  skin-hairs 
  only. 
  The 
  heads 
  of 
  these 
  two 
  specimens 
  are 
  pale, 
  but 
  

   have 
  some 
  dark 
  markings 
  of 
  exactly 
  the 
  same 
  pattern 
  as 
  those 
  of 
  A. 
  

   cosmodactyla 
  (Chapman). 
  

  

  Variation 
  of 
  larva. 
  — 
  There 
  are 
  two 
  very 
  distinct 
  varieties 
  of 
  the 
  

   larva 
  of 
  this 
  species 
  : 
  — 
  

  

  1. 
  The 
  ground-colour 
  of 
  a 
  clear 
  purplish-pink; 
  head 
  very 
  dark 
  sienna-brown, 
  

   almost 
  black; 
  the 
  smoke-coloured 
  dorsal 
  vessel 
  shows 
  through 
  as 
  the 
  dorsal 
  stripe; 
  

   subdorsal 
  stripes 
  clear 
  white, 
  and 
  very 
  conspicuous 
  ; 
  below 
  them 
  is 
  a 
  narrow 
  and 
  

   interrupted 
  white 
  line, 
  and 
  another 
  about 
  the 
  same 
  width, 
  but 
  which, 
  being 
  tinged 
  with 
  

   pink, 
  is 
  not 
  so 
  pale, 
  along 
  the 
  spiracles 
  ; 
  hairs 
  white. 
  Ventral 
  surface 
  semitrans- 
  

   lucent, 
  yellowish-grey, 
  prolegs 
  purplish-pink 
  on 
  the 
  outside 
  ; 
  anterior 
  legs 
  of 
  the 
  

   dark 
  sienna-brown 
  of 
  the 
  head, 
  but 
  with 
  paler 
  rings. 
  

  

  2. 
  The 
  ground-colour 
  bright 
  pale 
  green 
  ; 
  the 
  markings 
  the 
  same 
  as 
  invar. 
  1, 
  

   except 
  that 
  the 
  white 
  stripes 
  are 
  scarcely 
  so 
  conspicuous 
  ; 
  in 
  some 
  specimens 
  the 
  

   smoky 
  mediodorsal 
  vessel 
  is 
  tinged 
  with 
  pink, 
  and 
  the 
  ventral 
  surface 
  and 
  prolegs 
  

   are 
  of 
  the 
  same 
  bright 
  green 
  as 
  the 
  dorsal 
  area 
  (Porritt). 
  

  

  Buckler 
  figured 
  (Larvae, 
  etc., 
  pi. 
  clxiii., 
  figs. 
  6 
  and 
  6a) 
  two 
  larva?, 
  

   after 
  their 
  final 
  moult, 
  on 
  September 
  1st, 
  1877, 
  showing 
  considerable 
  

   difference 
  in 
  their 
  markings 
  ; 
  they 
  were 
  feeding 
  on 
  the 
  seeding 
  flower- 
  

   spikes 
  of 
  Stachys 
  sylvatica, 
  and 
  the 
  moths 
  emerged 
  September 
  15th, 
  

   1877. 
  

  

  Foodplants. 
  — 
  Seeds 
  of 
  AqwUegia 
  vulgaris 
  (Frey), 
  (lowers 
  ami 
  

   unripe 
  seeds 
  of 
  Stachys 
  sylvatica 
  (Bankes), 
  S, 
  palustris, 
  Euphrasia 
  officinalis 
  

   (Schiitze), 
  Salvia 
  glutinosa 
  (Hofmann), 
  flowers 
  and 
  young 
  fruit 
  of 
  

  

  