﻿396 
  BRITISH 
  LEPIDOPTERA. 
  

  

  On 
  the 
  abdominal 
  segments, 
  i, 
  ii, 
  iii, 
  and 
  iv 
  + 
  v 
  have 
  each 
  two 
  

   secondary 
  hairs 
  varying 
  to 
  one, 
  or 
  three 
  in 
  some 
  cases 
  ; 
  iii 
  has 
  most 
  

   frequently 
  only 
  one; 
  vi 
  has 
  one; 
  vii 
  usually 
  the 
  three 
  ordinary 
  hairs 
  (on 
  

   one 
  plate); 
  there 
  is 
  an 
  accessory 
  hair 
  like 
  a 
  secondary 
  behind 
  the 
  spiracle, 
  

   but, 
  except 
  this, 
  there 
  are 
  no 
  secondary 
  skin 
  -hairs 
  on 
  the 
  abdominal 
  

   segments. 
  The 
  secondary 
  hairs 
  on 
  the 
  meso- 
  and 
  metathorax 
  are 
  

   those 
  already 
  noted 
  on 
  the 
  first 
  and 
  third 
  paired 
  tubercles, 
  a 
  small 
  one 
  

   on 
  the 
  accessory 
  tubercle 
  behind 
  the 
  third 
  pair, 
  and 
  three 
  that 
  are 
  skin- 
  

   hairs 
  (or 
  accessories), 
  two 
  behind 
  the 
  first 
  double 
  tubercle, 
  one 
  above 
  

   the 
  other, 
  and 
  a 
  third, 
  also 
  posterior, 
  a 
  good 
  way 
  below 
  the 
  third 
  paired 
  

   tubercles 
  ; 
  none 
  of 
  these 
  seem 
  quite 
  constant 
  as 
  to 
  presence, 
  or 
  position, 
  

   except 
  one 
  of 
  those 
  behind 
  the 
  first 
  tubercle 
  ; 
  the 
  props 
  of 
  the 
  prolegs 
  

   are 
  tubes 
  of 
  dark 
  chifcin 
  ; 
  there 
  are 
  five 
  black 
  crochets 
  to 
  each. 
  The 
  

   primary 
  hairs 
  are 
  all 
  somewhat 
  thickened 
  at 
  end, 
  and 
  the 
  secondaries 
  

   are 
  markedly 
  so 
  (Chapman, 
  June 
  8th, 
  1904). 
  Fourth 
  instar: 
  9mm.- 
  

   10mm. 
  long 
  ; 
  build, 
  rather 
  long 
  and 
  slender, 
  tapering 
  gradually 
  to 
  head 
  

   and 
  anus. 
  The 
  warts 
  much 
  more 
  developed, 
  yellow 
  in 
  colour; 
  the 
  

   raised 
  skin-areas, 
  which 
  carry 
  them, 
  bear 
  no 
  spicules, 
  so 
  that 
  the 
  warts 
  

   stand 
  out 
  in 
  marked 
  contrast 
  with 
  the 
  dark 
  green 
  skin, 
  and 
  its 
  dense 
  

   coat 
  of 
  small 
  dark 
  spicules; 
  a 
  few 
  scattered 
  skin-surface 
  secondary 
  hairs 
  

   now 
  present, 
  and 
  there 
  is 
  a 
  structural 
  (caused 
  by 
  the 
  absence 
  of 
  

   spicules) 
  mediodorsal 
  line 
  extending 
  forwards 
  across 
  the 
  meta- 
  and 
  

   part 
  of 
  mesothorax. 
  The 
  head 
  black, 
  mottled 
  with 
  very 
  pale 
  brown. 
  

   A 
  depression 
  on 
  either 
  side 
  of 
  the 
  prothoracic 
  scutellar 
  plate, 
  in 
  the 
  

   same 
  position 
  as 
  in 
  Stenoptilia 
  (pterodactyla), 
  but 
  the 
  depressions 
  

   un 
  pigmented. 
  The 
  secondary 
  hairs 
  (accompanying 
  primary 
  setas) 
  on 
  

   the 
  warts 
  much 
  more 
  numerous 
  than 
  in 
  preceding 
  instar. 
  The 
  skin- 
  

   surface 
  is 
  of 
  a 
  bright 
  and 
  vivid 
  green, 
  but, 
  to 
  a 
  general 
  view, 
  it 
  appears 
  

   a 
  dull 
  green, 
  owing, 
  I 
  take 
  it, 
  to 
  the 
  dulling 
  effect 
  of 
  the 
  hairs, 
  and 
  the 
  

   coat 
  of 
  black 
  spicules. 
  There 
  are 
  many 
  secondary 
  hairs 
  present, 
  in 
  

   addition 
  to 
  the 
  tubercular 
  hairs, 
  all 
  the 
  secondary, 
  and 
  some 
  of 
  the 
  

   tubercular, 
  hairs, 
  being 
  bulbed 
  at 
  tip. 
  A 
  darker 
  green 
  mediodorsal 
  

   line 
  is 
  present 
  on 
  all 
  segments. 
  The 
  1st 
  to 
  7th 
  abdominal 
  segments 
  

   have 
  a 
  slight 
  circular 
  pit, 
  or 
  depression, 
  in 
  the 
  centre 
  of 
  dorsum. 
  On 
  

   the 
  3rd 
  abdominal 
  segment 
  there 
  is 
  a 
  small 
  black 
  spot, 
  or 
  wart, 
  in 
  the 
  

   centre 
  of 
  the 
  depression. 
  Head 
  very 
  small, 
  smooth, 
  and 
  shiny, 
  with 
  

   longish 
  hairs 
  ; 
  partially 
  retractile 
  ; 
  in 
  colour 
  green, 
  with 
  a 
  good 
  deal 
  

   of 
  black 
  mottling 
  on 
  face 
  and 
  down 
  cheeks. 
  Body 
  stout, 
  tapering 
  at 
  

   either 
  end 
  ; 
  segments 
  very 
  distinct. 
  Certain 
  parts 
  of 
  the 
  medio- 
  

   dorsal 
  line 
  on 
  thoracic 
  segments 
  are 
  shiny, 
  the 
  skin-surface 
  being 
  bare 
  

   of 
  spicules 
  at 
  these 
  points. 
  The 
  tubercles 
  are 
  not 
  nearly 
  so 
  prominent 
  

   as 
  in 
  the 
  Alucitine 
  species 
  (PorHttia 
  yalactodactyla, 
  Alucita 
  yenta- 
  

   dactyla, 
  Ovendenia 
  septodactyla 
  (lienigianus) 
  , 
  and 
  Oidaematophorus 
  

   lithodactyla. 
  The 
  spiracles 
  are 
  low, 
  with 
  walls 
  but 
  slightly 
  raised 
  

   above 
  skin-surface 
  ; 
  the 
  chitinous 
  rims 
  are 
  pale 
  brown. 
  The 
  

   prolegs 
  long 
  and 
  slender, 
  as 
  in 
  other 
  species. 
  Tubercles 
  i 
  and 
  ii 
  are 
  

   in 
  trapezoidal 
  position, 
  well 
  apart 
  in 
  comparison 
  with 
  their 
  position 
  in 
  

   Porrittia 
  yalactodactyla, 
  but 
  near 
  in 
  comparison 
  with 
  Adactylus 
  bennetii, 
  

   ii 
  slightly 
  larger 
  than 
  i 
  [although 
  on 
  the 
  meso- 
  and 
  metathorax 
  i 
  is 
  very 
  

   large 
  and 
  ? 
  ii 
  is 
  reduced 
  (so 
  far 
  as 
  I 
  can 
  judge, 
  owing 
  to 
  the 
  confusing 
  

   secondary 
  hairs) 
  to 
  a 
  single 
  hair] 
  ; 
  iii 
  is 
  large 
  and 
  directly 
  above 
  spiracle 
  ; 
  

   iv 
  and 
  v 
  form 
  a 
  conjoined 
  wart 
  below 
  the 
  spiracle, 
  situated 
  on 
  lateral 
  

   ridge; 
  both 
  the 
  posterior 
  secondary 
  warts 
  observed 
  in 
  Oidaematophorus 
  

  

  