﻿AMBLYPTILIA 
  COSMODACTYLA. 
  285 
  

  

  instar: 
  Length 
  8mm., 
  of 
  a 
  rather 
  slender 
  type 
  (i.e., 
  of 
  the 
  Stenoptiliid 
  

   form), 
  of 
  cylindrical 
  section, 
  without 
  any 
  marked 
  lateral 
  flange, 
  taper- 
  

   ing 
  considerably 
  towards 
  head 
  and 
  anus. 
  The 
  head 
  is 
  small, 
  rounded, 
  

   and 
  partially 
  retractile 
  beneath 
  the 
  anterior 
  skin-folds 
  of 
  the 
  prothorax. 
  

   The 
  segmentation 
  is, 
  as 
  usual, 
  well-marked, 
  the 
  subsegmentation 
  also 
  

   more 
  distinct 
  than 
  is 
  usually 
  the 
  case. 
  Tubercles 
  i 
  well 
  separated 
  from 
  ii 
  

   on 
  the 
  abdominal 
  segments. 
  The 
  skin 
  rough 
  and 
  prickly, 
  owing 
  to 
  the 
  

   spicules 
  being 
  well-developed. 
  The 
  tubercles 
  exhibit 
  distinct 
  incipient 
  

   wart-structure, 
  bearing, 
  usually, 
  one 
  long 
  primary 
  seta, 
  a 
  medium-sized, 
  

   and 
  one 
  or 
  more 
  small 
  secondaries, 
  similar 
  to 
  those 
  that 
  are 
  pretty 
  

   generally 
  scattered 
  over 
  the 
  skin-surface, 
  and 
  which 
  appear 
  sometimes 
  to 
  

   be, 
  but 
  doubtf 
  ully,in 
  association 
  with 
  the 
  primary 
  tubercles. 
  The 
  secondary 
  

   hairs 
  have 
  knobbed 
  or 
  spatulate 
  tops, 
  and 
  are 
  black 
  or 
  white 
  in 
  colour, 
  

   hairs 
  of 
  both 
  colours 
  being 
  present. 
  The 
  scutellum 
  and 
  anal 
  plates 
  

   strike 
  one 
  as 
  being 
  small 
  ; 
  they 
  are 
  not 
  distinctively 
  coloured, 
  and 
  

   consequently 
  do 
  not 
  show 
  up 
  in 
  any 
  marked 
  contrast 
  with 
  the 
  general 
  

   skin-surface. 
  The 
  former 
  has 
  the 
  two 
  depressed 
  dark-coloured 
  spots 
  as 
  in 
  

   pterodactyla 
  (fuse 
  us), 
  etc. 
  Spiracles 
  are 
  raised 
  and 
  prominent, 
  but 
  are 
  not 
  

   tall 
  tubes 
  as 
  in 
  Ovendenia 
  septodactyla 
  (lienitjianus) 
  , 
  etc. 
  The 
  head 
  is 
  smooth 
  

   and 
  polished, 
  rounded, 
  and 
  of 
  a 
  brown 
  colour, 
  with 
  mottlings 
  of 
  dark 
  and 
  

   light 
  of 
  the 
  same 
  hue, 
  chiefly 
  restricted 
  to 
  the 
  upper 
  and 
  posterior 
  portions 
  ; 
  

   the 
  ocelli, 
  as 
  usual, 
  are 
  prominent. 
  The 
  primary 
  hairs 
  are 
  tall, 
  slightly 
  

   thorned, 
  tapering, 
  but 
  blunt-ended, 
  hardly 
  knobbed, 
  but 
  very 
  slightly 
  

   thickened 
  at 
  the 
  tip, 
  as 
  though 
  the 
  tip 
  had 
  been 
  fused. 
  Legs 
  are 
  dark 
  at 
  

   base, 
  pale 
  at 
  tip 
  ; 
  the 
  prolegs 
  are 
  of 
  the 
  normal 
  "plume 
  " 
  type, 
  long 
  and 
  

   rather 
  slender, 
  the 
  anal 
  ones 
  much 
  shorter 
  proportionally, 
  and 
  stronger 
  

   looking. 
  The 
  prothoracic 
  and 
  8th 
  abdominal 
  spiracles 
  are 
  extra 
  large, 
  

   especially 
  those 
  of 
  the 
  8th 
  abdominal; 
  the 
  1st 
  abdominal 
  does 
  not 
  show 
  a 
  

   very 
  appreciable 
  increase. 
  The 
  thoracic 
  tubercles 
  are 
  — 
  conjoined 
  i 
  and 
  ii 
  

   on 
  the 
  middle 
  of 
  the 
  three 
  subsegments, 
  there 
  is 
  no 
  accessory 
  group 
  behind 
  

   these, 
  only 
  the 
  normal 
  scattered 
  secondary 
  hairs 
  ; 
  iii 
  and 
  iv 
  form 
  a 
  conj 
  oined 
  

   group, 
  with 
  two 
  long 
  hairs 
  ; 
  v 
  now 
  bears 
  two 
  hairs, 
  one 
  being 
  probably 
  

   vi, 
  and 
  the 
  usual 
  posterior 
  subprimary, 
  bearing 
  only 
  one 
  hair, 
  is 
  present. 
  

   On 
  the 
  abdominal 
  segments, 
  i 
  is 
  the 
  larger, 
  if 
  anything, 
  but 
  there 
  is 
  but 
  

   little 
  difference 
  in 
  size 
  between 
  i 
  and 
  ii, 
  the 
  two 
  pairs 
  are 
  well 
  separated 
  

   from 
  each 
  other; 
  iii 
  is 
  rather 
  close 
  down 
  to 
  the 
  spiracle; 
  iv 
  and 
  v 
  form 
  

   a 
  combined 
  group 
  beneath 
  the 
  spiracle 
  ; 
  vi 
  bears 
  one 
  long, 
  and 
  two 
  

   secondary, 
  hairs 
  ; 
  vii 
  forms 
  a 
  small 
  group. 
  Only 
  one 
  accessory 
  post- 
  

   spiracular 
  hair 
  is 
  present, 
  and 
  this 
  is 
  slightly 
  above 
  the 
  level 
  of 
  the 
  

   spiracle 
  ; 
  this 
  is 
  of 
  medium 
  length, 
  and 
  has 
  one 
  or 
  two 
  of 
  the 
  small 
  

   skin-surface 
  secondaries 
  in 
  doubtful 
  association 
  with 
  it. 
  In 
  coloration, 
  the 
  

   dorsal 
  area 
  is 
  a 
  purplish-pink, 
  shading 
  off 
  beneath 
  into 
  the 
  green 
  of 
  the 
  

   ventral 
  area; 
  there 
  is 
  a 
  slightly 
  marked 
  median 
  stripe; 
  a 
  broadly 
  

   irregular, 
  and 
  somewhat 
  broken, 
  subdorsal 
  band 
  of 
  whitish, 
  and 
  another 
  

   similar 
  lateral 
  band, 
  rather 
  higher 
  up 
  than 
  usual, 
  is 
  placed 
  above 
  

   the 
  spiracles. 
  Another 
  form 
  of 
  the 
  larva, 
  or 
  an 
  older 
  stage 
  (though 
  it 
  

   is 
  little 
  if 
  at 
  all 
  larger), 
  is 
  of 
  a 
  pale, 
  but 
  bright, 
  clear 
  given, 
  t 
  ho 
  markings 
  as 
  

   above, 
  but 
  the 
  median 
  line 
  shows 
  up 
  darker, 
  and 
  there 
  is 
  a 
  double. 
  

   yellow, 
  dorsal 
  spot 
  beneath 
  the 
  skin 
  (? 
  the 
  testes) 
  on 
  the 
  5th 
  abdominal 
  

   segment. 
  Possibly 
  the 
  difference 
  in 
  coloration 
  is 
  sexual 
  (Bacot, 
  

   July 
  21st, 
  1904). 
  Buckler 
  figured 
  (Larvae, 
  etc., 
  pi. 
  elxiii.. 
  fig. 
  5) 
  on 
  

   July 
  31st, 
  1862, 
  a 
  larva, 
  of 
  this 
  species, 
  after 
  its 
  final 
  moult, 
  that 
  had 
  

   been 
  feeding 
  on 
  flowers 
  of 
  rest-harrow; 
  the 
  imago 
  emerged 
  August 
  81st, 
  

   1862. 
  Hiibner 
  figured 
  (Raupen, 
  etc., 
  i\., 
  Aluc. 
  i., 
  pi. 
  e.. 
  tig. 
  o) 
  the 
  

  

  