﻿ADACTYLUS 
  BENNETII. 
  145 
  

  

  very 
  distinctly 
  separated 
  from 
  the 
  8th, 
  although 
  the 
  division 
  can 
  be 
  

   easily 
  seen 
  if 
  looked 
  for, 
  bears 
  a 
  short 
  cone-shaped 
  horn 
  (fleshy-looking) 
  

   at 
  its 
  posterior 
  margin 
  in 
  central 
  dorsal 
  position. 
  The 
  horn 
  slopes 
  

   backwards 
  over 
  anus 
  (it 
  much 
  resembles 
  the 
  horn 
  of 
  an 
  adult 
  larva 
  of 
  

   Amorpha 
  populi), 
  and 
  bears 
  two 
  small 
  glandular 
  club-shaped 
  hairs, 
  one 
  

   on 
  either 
  side 
  just 
  below 
  the 
  apex. 
  In 
  addition 
  to 
  these 
  two 
  hairs 
  near 
  

   the 
  summit 
  of 
  the 
  horn, 
  there 
  are 
  two, 
  one 
  on 
  either 
  side, 
  near 
  the 
  base 
  

   of 
  the 
  horn, 
  club-shaped 
  and 
  similar 
  to 
  those 
  near 
  the 
  summit. 
  The 
  

   skin 
  is 
  studded 
  all 
  over 
  its 
  dorsal 
  and 
  lateral 
  areas 
  with 
  small 
  brown 
  

   chitinous 
  buttons, 
  it 
  is 
  also 
  speckled 
  with 
  less 
  numerous 
  and 
  larger 
  

   pale 
  yellowish 
  spots, 
  these 
  two 
  characters 
  together 
  producing 
  the 
  effect 
  

   of 
  shagreen-spots, 
  one 
  of 
  the 
  chief 
  features 
  of 
  its 
  resemblance 
  to 
  the 
  

   Sphingid 
  larvae. 
  The 
  prolegs 
  are 
  small 
  and 
  bear 
  a 
  ring 
  of 
  hooks 
  ; 
  so 
  far 
  as 
  

   can 
  be 
  seen, 
  however, 
  these 
  are 
  ill-developed 
  on 
  the 
  outer 
  portion 
  of 
  the 
  

   ring; 
  the 
  anal 
  claspers 
  have 
  an 
  incomplete 
  ring, 
  not 
  quite 
  half 
  a 
  circle. 
  

   The 
  hairs 
  are 
  short, 
  club-shaped, 
  of 
  a 
  semi-transparent 
  white 
  (? 
  of 
  a 
  

   glandular 
  nature). 
  Tubercles 
  i 
  and 
  ii 
  are 
  in 
  trapezoidal 
  position, 
  far 
  

   apart, 
  due, 
  perhaps, 
  to 
  the 
  great 
  length 
  of 
  the 
  segments, 
  ii, 
  however, 
  not 
  

   greatly 
  further 
  from 
  the 
  centre 
  than 
  i, 
  but 
  far 
  enough 
  to 
  be 
  discerned 
  ; 
  iii 
  

   is 
  present, 
  situated 
  just 
  above 
  the 
  spiracle 
  ; 
  the 
  two 
  subspiraculars 
  are 
  

   present, 
  iv 
  below 
  and 
  posterior 
  to 
  spiracle, 
  v 
  further 
  below 
  and 
  anterior 
  

   to 
  spiracle. 
  The 
  setae 
  on 
  the 
  thoracic 
  segments 
  differ 
  from 
  those 
  on 
  

   the 
  abdominal 
  segments, 
  i 
  and 
  ii 
  being 
  placed 
  transversely 
  and 
  not 
  as 
  

   trapezoidals. 
  A 
  slight 
  pit 
  or 
  scar 
  is 
  present 
  on 
  the 
  meso- 
  and 
  metathorax 
  

   in 
  about 
  the 
  position 
  of 
  the 
  spiracle 
  on 
  the 
  abdominal 
  segments 
  ; 
  this 
  

   is 
  the 
  more 
  noticeable 
  on 
  account 
  of 
  the 
  absence 
  from 
  the 
  skin, 
  at 
  this 
  

   point, 
  of 
  the 
  ordinary 
  chitinous 
  button 
  (Bacot, 
  May 
  18th, 
  1899). 
  The 
  

   fullgrown 
  larva, 
  14mm. 
  long, 
  is 
  green, 
  covered 
  with 
  very 
  fine 
  black 
  points, 
  

   suggestive 
  of 
  a 
  darker 
  dorsal 
  line, 
  which 
  is, 
  in 
  reality, 
  the 
  dorsal 
  vessel, 
  

   or 
  rather 
  the 
  absence 
  of 
  fat 
  bodies 
  over 
  it. 
  There 
  is 
  a 
  pinkish 
  tinge 
  

   towards 
  the 
  terminal 
  segments. 
  The 
  horn 
  is 
  directed 
  backwards 
  with 
  

   two 
  points 
  (the 
  hairs). 
  The 
  anal 
  plate 
  has 
  three 
  pairs 
  of 
  hairs, 
  which 
  

   are 
  large 
  and 
  obvious 
  as 
  compared 
  with 
  others. 
  The 
  frontal 
  horns 
  

   (prothorax) 
  projecting 
  over 
  head, 
  each 
  carry 
  one 
  very 
  minute 
  hair, 
  

   nearly 
  as 
  long 
  as 
  those 
  on 
  the 
  9th 
  abdominal. 
  The 
  spiracles 
  are 
  like 
  

   small 
  bronzy 
  metallic 
  shields, 
  the 
  actual 
  spiracle 
  being 
  at 
  the 
  summit 
  

   of 
  the 
  boss. 
  In 
  the 
  living 
  larva 
  the 
  supraspiracular 
  tubercle 
  (iii) 
  can 
  be 
  

   detected, 
  but 
  the 
  trapezoidals 
  (i 
  and 
  ii) 
  are 
  indistinguishable 
  from 
  the 
  

   small 
  bosses 
  that 
  are 
  pale 
  and 
  inconspicuous 
  in 
  this 
  larva, 
  but 
  noted 
  

   as 
  white 
  points 
  in 
  another 
  larva, 
  0-26 
  in. 
  long. 
  On 
  all 
  the 
  younger 
  

   larvae 
  these 
  white 
  points 
  are 
  conspicuous. 
  This 
  one 
  may 
  be 
  near 
  

   pupation. 
  The 
  larva 
  looks 
  very 
  smooth 
  and 
  rounded, 
  very 
  like 
  Sphinx 
  

   ligustri, 
  due 
  to 
  there 
  being 
  no 
  evident 
  hairs, 
  bristles, 
  or 
  tubercles. 
  The 
  

   hooks 
  of 
  prolegs 
  are 
  8-10 
  on 
  an 
  inner 
  rather 
  forward 
  semicircle. 
  One 
  

   of 
  the 
  most 
  remarkable 
  peculiarities 
  of 
  this 
  larva 
  is 
  that 
  tubercle 
  i, 
  

   especially 
  on 
  the 
  posterior 
  segments, 
  has 
  a 
  remarkable 
  arrangement 
  

   of 
  skin-processes 
  all 
  round 
  it, 
  precisely 
  as 
  if 
  it 
  were 
  surrounded 
  by 
  

   ordinary 
  wing-scales, 
  but 
  only 
  the 
  tips 
  of 
  these, 
  with 
  four 
  to 
  six 
  sharp 
  

   teeth, 
  are 
  visible. 
  These 
  lie 
  like 
  scales 
  with 
  the 
  points 
  facing 
  

   posteriorly 
  (Chapman, 
  May, 
  1901). 
  The 
  larva 
  is 
  also 
  described 
  by 
  

   Moncreaff 
  (Ent., 
  v., 
  p. 
  321), 
  and 
  also 
  by 
  South 
  (Hut., 
  xvi.. 
  pp. 
  

   27-28). 
  Buckler 
  figured 
  the 
  larva 
  of 
  this 
  species 
  (Larva?, 
  etc.. 
  ix., 
  pi. 
  

   clxiii., 
  fig. 
  1) 
  on 
  April 
  29th, 
  1871. 
  

  

  