﻿STENOPTILIA 
  PTERODACTYLA. 
  378 
  

  

  in 
  same 
  skin, 
  or 
  than 
  larger 
  ones 
  in 
  next 
  stadium 
  (vide 
  infra), 
  due 
  to 
  the 
  

   stretching 
  of 
  the 
  skin 
  and 
  consequent 
  dispersion 
  of 
  hairs. 
  [These 
  larvae 
  

   were 
  mostly 
  on 
  flower-spikes, 
  but 
  had 
  just 
  left 
  finishing 
  the 
  terminal 
  

   buds 
  of 
  the 
  shoot. 
  For 
  moulting, 
  they 
  make 
  a 
  little 
  cocoon 
  amongst 
  

   the 
  leaves 
  and 
  buds 
  at 
  the 
  top 
  of 
  shoot. 
  The 
  smaller 
  larvae 
  were 
  dull 
  

   dusky-green, 
  with 
  a 
  slightly 
  darker 
  dorsal 
  line 
  and 
  black 
  spiracles. 
  

   Dorsal 
  tubercles 
  two 
  (or 
  three), 
  white-haired; 
  secondary 
  hairs 
  few, 
  

   inconspicuous, 
  black 
  above, 
  below 
  the 
  flange 
  white 
  ; 
  tubercle 
  iii 
  

   with 
  black 
  hairs 
  (?).] 
  (Chapman, 
  May 
  18th, 
  1904). 
  Penultimate 
  

   instar: 
  6mm. 
  -8mm. 
  in 
  length, 
  and 
  show 
  but 
  very 
  little 
  alteration 
  

   in 
  appearance 
  from 
  that 
  of 
  the 
  last 
  instar 
  ; 
  the 
  spiracles 
  are 
  a 
  

   little 
  more 
  raised 
  in 
  this 
  individual, 
  and 
  the 
  hairs 
  appear 
  less 
  

   numerous, 
  at 
  any 
  rate 
  they 
  are 
  less 
  conspicuous. 
  The 
  colour 
  is 
  

   brighter, 
  more 
  of 
  an 
  orange-yellow, 
  while 
  the 
  median 
  band 
  

   appears 
  to 
  owe 
  its 
  existence 
  to 
  the 
  large 
  central 
  blood-vessel 
  that 
  lies 
  

   just 
  beneath 
  the 
  surface. 
  Most 
  of 
  the 
  warts 
  bear 
  one 
  large 
  and 
  one 
  

   medium-sized 
  hair, 
  and 
  from 
  two 
  to 
  four 
  small 
  ones. 
  The 
  skin 
  has 
  

   the 
  appearance 
  of 
  being 
  shagreened, 
  due 
  to 
  the 
  development 
  of 
  the 
  

   spicular 
  coat. 
  The 
  same 
  apparent 
  want 
  of 
  symmetry 
  is 
  present, 
  as 
  

   regards 
  the 
  situation 
  of 
  the 
  scattered 
  black 
  secondary 
  hairs 
  ; 
  in 
  this 
  

   skin 
  these 
  can 
  be 
  definitely 
  seen 
  to 
  be 
  trumpet-topped 
  (Bacot, 
  May 
  4th, 
  

   1904). 
  8mm. 
  -9mm. 
  long, 
  l*6mm. 
  thick 
  ; 
  numerous 
  hairs, 
  or 
  warts 
  ; 
  

   secondary 
  hairs 
  much 
  more 
  numerous, 
  with 
  many 
  white 
  ones 
  (as 
  

   well 
  as 
  black 
  dorsally). 
  Colours 
  much 
  the 
  same, 
  but 
  the 
  dark 
  green 
  

   is 
  a 
  marked 
  dorsal 
  line, 
  and 
  a 
  broad 
  band 
  from 
  below 
  up 
  to 
  nearly 
  ii. 
  

   This 
  band 
  contains, 
  on 
  each 
  segment, 
  three 
  paler 
  patches. 
  Between 
  

   this 
  band 
  and 
  dorsal 
  line 
  is 
  a 
  band 
  of 
  about 
  the 
  same 
  width, 
  much 
  

   paler, 
  whitish-green, 
  which 
  includes 
  i 
  and 
  ii 
  ; 
  below 
  the 
  lateral 
  dark 
  band 
  

   the 
  colour 
  is 
  again 
  pale 
  whitish-green. 
  Primary 
  hairs 
  white 
  ; 
  spicules, 
  

   and 
  some 
  secondary 
  hairs, 
  black, 
  but 
  most 
  of 
  these 
  latter 
  white. 
  Prolegs 
  

   appear 
  as 
  long 
  props. 
  Seen 
  at 
  a 
  proper 
  distance, 
  the 
  lateral 
  dark 
  band 
  

   has 
  a 
  chain-like 
  aspect, 
  owing 
  to 
  the 
  white 
  patches 
  in 
  it 
  (Chapman, 
  May 
  

   18th, 
  1904). 
  Final 
  instar 
  (young): 
  About 
  10mm. 
  long, 
  l*6mm. 
  wide, 
  

   tapering 
  to 
  anus, 
  blunter 
  at 
  head 
  ; 
  more 
  slender 
  than 
  the 
  larvae 
  of 
  

   many 
  of 
  the 
  exposed 
  feeders, 
  which, 
  again, 
  are 
  more 
  so 
  than 
  those 
  of 
  

   the 
  Platyptilias. 
  Colour 
  of 
  body 
  pale 
  yellowish-green, 
  with 
  darker 
  

   green 
  dorsal 
  line, 
  and 
  lateral 
  band 
  between 
  dorsal 
  (i 
  and 
  ii) 
  and 
  supra- 
  

   spiracular 
  (iii) 
  tubercles; 
  it 
  is 
  darker 
  again 
  below 
  flange, 
  which 
  gives 
  

   the 
  impression 
  that 
  the 
  flange, 
  and 
  above, 
  is 
  paler 
  from 
  the 
  skin 
  being 
  

   denser, 
  and 
  that 
  below 
  it 
  is 
  delicate, 
  and 
  shows 
  green 
  contents. 
  The 
  

   tubercles 
  are 
  disposed 
  as 
  described 
  in 
  small 
  larva, 
  but 
  have 
  now 
  a 
  larger 
  

   number 
  of 
  hairs, 
  and, 
  though 
  one 
  may 
  he 
  selected 
  as 
  being 
  the 
  primary 
  

   hair, 
  on 
  i, 
  two 
  others 
  come 
  rather 
  near 
  it, 
  on 
  ii 
  two 
  others 
  are 
  nearly 
  

   identical, 
  as 
  also 
  on 
  iii; 
  the 
  postspiracular 
  has 
  two 
  approaching 
  the 
  

   primary; 
  iv+v 
  have 
  two 
  primary 
  hairs 
  without 
  strong 
  competitors, 
  vi 
  

   also 
  is 
  still 
  alone 
  as 
  a 
  primary, 
  but 
  has 
  live 
  or 
  si\ 
  secondaries 
  round 
  it. 
  

   Secondary 
  hairs 
  are 
  abundant, 
  scattered 
  over 
  the 
  whole 
  surface, 
  and 
  

   also 
  on 
  the 
  tubercles 
  ; 
  nearly 
  all 
  of 
  them 
  are 
  now 
  white, 
  there 
  are. 
  

   however, 
  a 
  few 
  black 
  dorsally, 
  and 
  two 
  or 
  three 
  on 
  most 
  tuben 
  

   (Chapman). 
  Final 
  instar 
  (full-grown) 
  : 
  The 
  Larva 
  has 
  a 
  very 
  trans- 
  

   parent 
  skiti, 
  and, 
  consequently, 
  presents 
  two 
  very 
  different 
  aspects, 
  

   according 
  to 
  whether 
  it 
  is 
  feeding 
  or 
  whether 
  it 
  is 
  laid 
  up 
  for 
  pupation, 
  

   the 
  feeding 
  larva 
  having 
  the 
  colour 
  much 
  dominated 
  by 
  the 
  dark 
  green 
  

  

  