﻿ADACTYLUS 
  BENNETII. 
  143 
  

  

  ventral 
  prolegs 
  consist 
  of 
  a 
  base 
  so 
  short 
  that 
  the 
  surface 
  of 
  the 
  body 
  

   touches 
  the 
  surface 
  on 
  which 
  the 
  larva 
  rests 
  (perhaps 
  correlated 
  with 
  the 
  

   glabrous 
  leaf 
  surface 
  on 
  which 
  it 
  lives, 
  and 
  contrasting 
  with 
  the 
  pedicels 
  

   of 
  the 
  prolegs 
  of 
  species 
  onhairy 
  or 
  woolly 
  leaves), 
  and 
  carries 
  a 
  circle 
  

   of 
  fifteen 
  hooks 
  disposed 
  round 
  the 
  inner, 
  anterior 
  and 
  posterior 
  

   portions, 
  but 
  wanting 
  on 
  the 
  outer 
  (slightly 
  anterior) 
  fourth. 
  The 
  

   anal 
  prolegs 
  have 
  much 
  the 
  same 
  structure, 
  the 
  hookless 
  portion 
  of 
  

   the 
  circle 
  being, 
  however, 
  more 
  anterior. 
  The 
  central 
  hooks 
  are 
  larger 
  

   than 
  the 
  others. 
  There 
  are 
  two 
  long 
  bristles, 
  low 
  down 
  on 
  the 
  bases 
  of 
  

   the 
  claspers, 
  and 
  four 
  smaller 
  ones 
  higher 
  up. 
  On 
  the 
  2nd 
  and 
  3rd 
  

   thoracic 
  segments 
  are 
  four 
  tubercles 
  between 
  dorsum 
  and 
  spiracular 
  

   level, 
  almost 
  in 
  a 
  row 
  down 
  the 
  middle 
  of 
  the 
  segment, 
  but 
  the 
  lowest 
  

   a 
  little 
  forward. 
  Of 
  those 
  on 
  the 
  marginal 
  flange, 
  one 
  is 
  at 
  upper 
  

   margin 
  of 
  flange 
  (about 
  spiracular 
  level), 
  and 
  nearly 
  below 
  the 
  4th 
  of 
  

   upper 
  set, 
  a 
  second 
  some 
  way 
  behind 
  this 
  and 
  triflingly 
  lower, 
  

   another 
  well 
  below 
  it 
  and 
  a 
  trifle 
  in 
  front 
  ; 
  lower 
  still, 
  at 
  base 
  of 
  true 
  

   legs, 
  are 
  two, 
  tolerably 
  near 
  together 
  and 
  at 
  about 
  same 
  level 
  (Chap- 
  

   man, 
  October 
  12th, 
  1903). 
  Penultimate 
  instar 
  : 
  Small 
  larva, 
  0*26 
  in. 
  

   long, 
  is 
  reddish-brown 
  in 
  tint, 
  but 
  really 
  seems 
  to 
  have 
  a 
  green 
  

   interior 
  with 
  a 
  warm 
  rosy 
  pink 
  skin, 
  varying 
  to 
  pink 
  only 
  on 
  two 
  

   front 
  horns 
  and 
  tail 
  horn, 
  dotted 
  all 
  over 
  with 
  white 
  points, 
  which 
  

   are 
  the 
  larger 
  of 
  very 
  numerous 
  hard-looking 
  tubercles 
  covering 
  the 
  

   whole 
  surface, 
  the 
  smaller 
  of 
  which 
  are 
  black 
  or 
  self-coloured 
  (colour 
  

   of 
  skin 
  ?).. 
  Caudal 
  horn 
  carries 
  two 
  hairs, 
  each 
  front 
  horn 
  carries 
  one, 
  

   the 
  head 
  is 
  usually 
  retracted 
  to 
  be 
  beneath 
  these. 
  The 
  Sphinx-like 
  

   character 
  of 
  the 
  anal 
  horn 
  is 
  increased 
  by 
  finding 
  that 
  it 
  carries 
  two 
  hairs 
  

   at 
  its 
  extremities, 
  but 
  any 
  real 
  relationship 
  is 
  contradicted 
  by 
  its 
  being 
  on 
  

   the 
  9th 
  abdominal 
  segment 
  instead 
  of 
  on 
  the 
  8th 
  as 
  in 
  Sphinges. 
  There 
  is 
  

   a 
  faint 
  suggestion 
  of 
  a 
  yellow 
  subdorsal 
  line 
  (Chapman, 
  May 
  11th, 
  1904). 
  

   Final 
  instar 
  (just 
  moulted) 
  : 
  A 
  larva 
  of 
  A. 
  bennetii 
  was 
  observed 
  on 
  

   May 
  1st, 
  1904, 
  at 
  about 
  noon, 
  that 
  had 
  evidently 
  just 
  changed 
  its 
  

   skin. 
  The 
  old 
  skin 
  was 
  stretched 
  almost 
  at 
  full 
  length 
  by 
  the 
  side 
  of 
  

   a 
  large 
  hole 
  eaten 
  out 
  of 
  a 
  leaf 
  of 
  the 
  foodplant, 
  and 
  had 
  lost 
  its 
  colour 
  

   of 
  bright 
  green 
  with 
  purplish- 
  red 
  tinge 
  at 
  head 
  and 
  anal 
  end, 
  which 
  

   responded 
  so 
  excellently 
  to 
  the 
  coloured 
  edges 
  of 
  the 
  leaves 
  of 
  the 
  

   foodplant, 
  where 
  it 
  apparently 
  likes 
  to 
  rest, 
  and 
  was 
  of 
  a 
  semitrans- 
  

   parent 
  blackish-grey, 
  the 
  empty 
  head-case, 
  however, 
  being 
  quite 
  

   glassy-looking 
  and 
  transparent. 
  The 
  larva 
  was 
  now 
  9-4mm. 
  in 
  length, 
  

   of 
  a 
  more 
  yellow-green 
  tint, 
  and 
  the 
  intersegmental 
  incisions 
  were 
  

   quite 
  yellow, 
  the 
  head 
  and 
  prothorax 
  alone 
  being 
  of 
  the 
  previous 
  fuller 
  

   green 
  tint 
  ; 
  the 
  mouth-parts 
  are 
  now 
  tinged 
  with 
  brown 
  and 
  the 
  ocelli 
  

   brown-black; 
  the 
  double 
  pointed 
  prothoracic 
  cowl 
  is 
  of 
  a 
  delicate 
  red 
  ; 
  

   the 
  horn 
  on 
  the 
  9th 
  abdominal 
  segment 
  is 
  also 
  red 
  to 
  its 
  base 
  and 
  

   bluntly 
  pointed. 
  The 
  pro- 
  and 
  mesothorax 
  show 
  signs 
  of 
  three 
  

   subsegmenfcs, 
  but 
  the 
  abdominal 
  segments 
  1-9 
  show 
  two 
  subsegments 
  

   of 
  which 
  the 
  anterior 
  is 
  wider 
  and 
  carries 
  the 
  spiracle, 
  the 
  anterior 
  of 
  

   the 
  9th 
  abdominal 
  carries 
  the 
  horn, 
  but 
  the 
  posterior 
  subsegment 
  is 
  

   very 
  distinctly 
  marked 
  below 
  the 
  horn. 
  The 
  yellowness 
  of 
  the 
  ground 
  

   colour 
  is 
  due 
  to 
  the 
  large 
  size 
  and 
  abundance 
  of 
  the 
  shagreen 
  tubercles. 
  

   although 
  the 
  segmental 
  incisions 
  and 
  the 
  anal 
  segment 
  are 
  indepen- 
  

   dently 
  yellower 
  in 
  colour 
  than 
  the 
  rest 
  of 
  the 
  body. 
  The 
  cowl 
  and 
  

   anal 
  horn 
  are 
  also 
  heavily 
  shagreened. 
  The 
  spiracles 
  are 
  as 
  striking 
  

   as 
  ever, 
  those 
  on 
  the 
  prothorax 
  and 
  the 
  8th 
  abdominal 
  being 
  especially 
  

  

  