﻿ADKINIA 
  BIPUNCTIDACTYLA. 
  849 
  

  

  ii 
  are 
  somewhat 
  separated 
  ; 
  iii 
  close 
  above 
  the 
  somewhat 
  raised 
  spiracle 
  ; 
  

   iv 
  and 
  v 
  together 
  beneath 
  it, 
  as 
  usual. 
  The 
  spicules 
  are 
  dark 
  points 
  

   [The 
  facts 
  that 
  v 
  has 
  another 
  hair 
  close 
  to 
  it, 
  and 
  that 
  the 
  spicules 
  are 
  

   present, 
  show 
  that 
  this 
  larva 
  is 
  in 
  the 
  second, 
  not 
  the 
  first, 
  instar.] 
  

   (Bacot, 
  August 
  4th, 
  1905). 
  ? 
  Third 
  instar 
  (small) 
  : 
  3mm. 
  long. 
  

   Deep 
  brown 
  -reel 
  in 
  colour, 
  with 
  traces 
  of 
  paler 
  subdorsal 
  and 
  spiracular 
  

   lines. 
  Each 
  tubercle 
  (i, 
  ii, 
  iii, 
  iv, 
  and 
  v) 
  carries 
  a 
  long 
  hair, 
  nearly 
  as 
  

   long 
  as 
  the 
  larva 
  is 
  thick, 
  slightly 
  thickened 
  at 
  the 
  tip, 
  and 
  quite 
  white; 
  

   it 
  has 
  also 
  a 
  number 
  of 
  short, 
  white, 
  secondary 
  skin-hairs, 
  about 
  \ 
  

   length 
  of 
  tubercle-hairs 
  ; 
  no 
  secondary 
  hairs 
  on 
  tubercles. 
  Head 
  pale 
  

   in 
  front, 
  but, 
  dorsally, 
  deep 
  brown-red; 
  this 
  tint 
  runs 
  into 
  the 
  pale 
  

   as 
  three 
  or 
  four 
  interrupted 
  broad 
  streaks, 
  narrowing 
  downwards. 
  

   Third 
  instar 
  (grown) 
  : 
  [Another 
  bud 
  contained 
  another 
  larva 
  very 
  much 
  

   larger, 
  but 
  apparently 
  in 
  same 
  skin 
  ; 
  this 
  one 
  is 
  ready 
  to 
  moult 
  ;] 
  the 
  

   thoracic 
  segments 
  being 
  very 
  swollen, 
  with 
  a 
  pale, 
  long, 
  white 
  neck 
  ; 
  legs 
  

   widely 
  separate, 
  etc. 
  ; 
  the 
  hairs 
  relatively 
  short; 
  length, 
  perhaps, 
  6mm., 
  

   but 
  I 
  did 
  not 
  fully 
  disturb 
  larva. 
  Its 
  colour 
  is 
  pale, 
  with 
  two 
  irregular 
  

   longitudinal 
  red 
  bands 
  on 
  either 
  side 
  (very 
  like 
  that 
  of 
  Platyptilia 
  

   gonodactyla) 
  ; 
  the 
  extension 
  of 
  the 
  skin 
  by 
  growth, 
  affecting 
  chiefly, 
  

   apparently, 
  the 
  pale 
  portions 
  (Chapman, 
  August 
  17th, 
  1904). 
  ? 
  Fourth 
  

   instar: 
  Colour 
  dark 
  green, 
  with 
  a 
  darker 
  dorsal 
  shade, 
  that 
  fades 
  into 
  

   a 
  paler 
  area, 
  ending 
  just 
  outside 
  ii, 
  as 
  a 
  sudden 
  change 
  from 
  whitish- 
  

   green 
  to 
  dark 
  green, 
  but, 
  even 
  here, 
  there 
  is 
  no 
  definite 
  demarcation, 
  

   though 
  it 
  is 
  more 
  sudden 
  than 
  the 
  change 
  from 
  the 
  dark 
  dorsal 
  to 
  the 
  

   whitish 
  subdorsal 
  area 
  ; 
  there 
  is 
  a 
  paler 
  lateral 
  line 
  along 
  flange 
  below 
  

   iv 
  and 
  v, 
  and 
  obscure 
  paler 
  lines 
  above 
  this 
  ; 
  spiracles 
  black 
  ; 
  tubercles 
  

   i, 
  ii, 
  and 
  iii 
  each 
  has 
  a 
  single 
  white 
  hair; 
  iv 
  + 
  v 
  carry 
  two, 
  the 
  front 
  

   one 
  higher; 
  the 
  hairs 
  on 
  i, 
  iii, 
  and 
  v 
  incline 
  forwards; 
  those 
  on 
  ii 
  

   and 
  iv 
  backwards 
  ; 
  all 
  with 
  a 
  slight 
  curve, 
  length 
  about 
  0*5mm. 
  The 
  

   secondary 
  skin-hairs 
  are 
  numerous, 
  black 
  on 
  the 
  darker 
  dorsal 
  area, 
  white 
  

   elsewhere, 
  except 
  a 
  long 
  one 
  behind 
  iii, 
  which 
  is 
  rather 
  a 
  secondary 
  

   tubercular 
  hair, 
  and 
  several 
  that 
  seem 
  also 
  rather 
  tubercular, 
  than 
  skin,. 
  

   hairs, 
  round 
  iv 
  + 
  v. 
  These 
  are 
  about 
  O'lrniu. 
  long, 
  that 
  of 
  iii 
  0'15mm., 
  

   whilst 
  the 
  ordinary 
  skin-hairs 
  are 
  about 
  O'OSmm., 
  but 
  vary 
  a 
  good 
  

   deal, 
  some 
  round 
  i 
  and 
  ii 
  are 
  rather 
  longer, 
  and 
  seem 
  to 
  incline 
  to 
  be 
  

   tubercular. 
  These, 
  like 
  the 
  other 
  skin-hairs, 
  have 
  dilated 
  tips, 
  which 
  

   is 
  hardly 
  so 
  with 
  the 
  black 
  ones 
  of 
  iii, 
  and 
  iv 
  + 
  v, 
  and 
  are 
  fine 
  skin-points. 
  

   Prothoracic 
  plate 
  with 
  black 
  markings 
  (Chapman, 
  August 
  25th, 
  

   1904). 
  [These 
  larvae 
  hung 
  up 
  for 
  pupation 
  August 
  27th 
  and 
  28th.] 
  

   Final 
  instar 
  (spring 
  larva, 
  not 
  fullgrown) 
  : 
  Only 
  6mm. 
  in 
  length. 
  

   It 
  differs 
  chiefly 
  from 
  the 
  fullgrown 
  larva 
  in 
  that 
  it 
  is 
  reddish-purple 
  in 
  

   colour, 
  without 
  any 
  green, 
  and 
  thatthe 
  skin-areas 
  at 
  the 
  bases 
  of 
  tubercles 
  

   are 
  more 
  raised 
  ; 
  this, 
  of 
  course, 
  may 
  be 
  partly 
  owing 
  to 
  its 
  not 
  having 
  

   filled 
  out 
  and 
  so 
  stretched 
  its 
  skin. 
  The 
  dorsal 
  tubercles 
  have 
  not, 
  as 
  

   a 
  rule, 
  a 
  second 
  medium-sized 
  hair 
  in 
  addition 
  bo 
  the 
  normal 
  primary 
  

   one, 
  and 
  the 
  upper 
  accessory 
  post-spiracular 
  is 
  not 
  SO 
  conspicuous, 
  

   owing 
  to 
  its 
  small 
  size. 
  Final 
  instar 
  (spring 
  larvae, 
  fullgrown) 
  : 
  

   Length 
  of 
  the 
  largest 
  larva 
  when 
  crawling 
  (it 
  will 
  not 
  rest), 
  L2mm, 
  : 
  

   width 
  slightly 
  less 
  than 
  2mm.; 
  in 
  form, 
  a 
  long 
  slender 
  Larva, 
  nearly 
  ov 
  

   quite 
  cylindrical, 
  and 
  tapering 
  gradually 
  in 
  both 
  directions 
  to 
  a 
  small 
  

   head 
  and 
  rather 
  pointed 
  anus. 
  The 
  segments 
  are 
  plump 
  ami 
  full, 
  with 
  

   well-marked 
  incisions, 
  but 
  no 
  noticeable 
  overlap. 
  The 
  subsegments 
  are 
  

   only 
  slightly 
  in 
  evidence 
  on 
  the 
  abdomen 
  when 
  crawling, 
  but 
  are 
  rather 
  

  

  