﻿180 
  BRITISH 
  LEPL0OPTERA. 
  

  

  band, 
  only 
  marked 
  at 
  the 
  incisions, 
  except 
  on 
  the 
  forward 
  and 
  hinder 
  

   segments, 
  and 
  interrupted 
  by 
  rich 
  brown 
  patches, 
  especially 
  on 
  the 
  meso- 
  

   and 
  metathorax, 
  and 
  more 
  or 
  less 
  to 
  5th 
  abdominal. 
  The 
  2nd 
  and 
  5th 
  

   abdominals 
  are 
  rich 
  red 
  -brown, 
  and 
  the 
  humps 
  on 
  the 
  mesothorax 
  and 
  

   8th 
  and 
  9fch 
  abdominals 
  are 
  brown, 
  the 
  front 
  humps 
  of 
  the 
  2nd 
  and 
  5th 
  

   abdominals 
  nearly 
  black 
  ; 
  there 
  is 
  a 
  darker 
  dorsal 
  line, 
  edged 
  with 
  paler, 
  

   almost 
  yellow. 
  The 
  general 
  effect, 
  however, 
  is 
  of 
  a 
  greenish 
  larva 
  

   with 
  reddish 
  markings, 
  which 
  imitates 
  closely 
  the 
  colouring 
  of 
  the 
  green 
  

   twigs 
  of 
  Tamaris, 
  just 
  as 
  the 
  brown 
  form 
  does 
  the 
  older 
  twigs 
  on 
  which 
  

   the 
  fullgrown 
  larvae 
  usually 
  rest. 
  This 
  imitation 
  of 
  the 
  foodplant 
  is 
  

   equally 
  strong 
  in 
  the 
  other 
  two 
  species 
  observed, 
  e.g., 
  the 
  larva 
  of 
  

   Adactylus 
  staticis 
  is 
  brown, 
  of 
  just 
  the 
  colour 
  of 
  the 
  stems 
  of 
  Statice 
  

   cordata, 
  which 
  are 
  broAvn, 
  with 
  a 
  somewhat 
  smooth 
  shining 
  surface 
  and 
  

   without 
  much 
  irregularity. 
  In 
  A. 
  staticis 
  the 
  protuberances 
  are 
  

   reduced 
  to 
  the 
  small 
  double 
  tail 
  horn 
  (on 
  9th 
  abdominal). 
  The 
  surface 
  

   has 
  numerous 
  little 
  points 
  that 
  give 
  a 
  shining 
  aspect 
  to 
  it, 
  and, 
  in 
  effect, 
  

   the 
  stem 
  and 
  larva 
  are 
  extremely 
  alike. 
  The 
  larva 
  of 
  Agdistis 
  heydenii 
  

   again 
  imitates 
  the 
  general 
  tone 
  of 
  the 
  Atriplex 
  halimus 
  to 
  an 
  extra- 
  

   ordinary 
  degree, 
  a 
  whity-buff 
  colour 
  with 
  the 
  peculiar 
  glaucous 
  

   colouring 
  of 
  the 
  plant, 
  enhanced 
  by 
  the 
  minute 
  opaline 
  or 
  transparent 
  

   balls 
  at 
  the 
  bases 
  of 
  the 
  hairs, 
  so 
  that, 
  seated 
  on 
  a 
  not 
  too 
  old 
  stem 
  or 
  

   petiole, 
  it 
  is 
  hardly 
  visible. 
  A 
  large 
  Noctuid 
  larva 
  imitates 
  the 
  same 
  

   glaucous 
  tone 
  by 
  colouring 
  that 
  seems 
  very 
  odd 
  in 
  a 
  Noctuid 
  larva. 
  I 
  

   suppose 
  this 
  to 
  be 
  Mamestra 
  chenopodiphaga. 
  The 
  interest 
  lies 
  largely 
  

   in 
  the 
  same 
  effect 
  being 
  so 
  successfully 
  attained 
  by 
  these 
  two 
  larvae 
  in 
  

   such 
  different 
  ways, 
  the 
  one 
  with 
  a 
  tuberculated 
  and 
  bristly 
  surface, 
  

   the 
  other 
  with 
  a 
  quite 
  smooth 
  skin. 
  The 
  "quite 
  smooth 
  skin" 
  is 
  

   really 
  very 
  minutely 
  tuberculated 
  with 
  pale 
  spots 
  on 
  a 
  greenish, 
  and 
  

   later 
  on 
  a 
  brownish, 
  ground. 
  The 
  halfgrown 
  larvae 
  are 
  greenish-white, 
  

   like 
  the 
  foliage, 
  the 
  fullgrown 
  larva 
  has 
  some 
  brown 
  tints, 
  and 
  no 
  

   doubt 
  affects 
  the 
  twigs 
  rather 
  than 
  leaves. 
  Chapman 
  has 
  also 
  described 
  

   in 
  detail 
  the 
  Agdistid 
  larvae 
  in 
  the 
  Walsingham 
  collection, 
  and 
  given 
  

   us 
  the 
  following 
  resume 
  thereof 
  : 
  — 
  

  

  1. 
  Adactylus* 
  bexxetii. 
  — 
  See 
  postecl 
  in 
  our 
  detailed 
  account 
  of 
  the 
  species. 
  

  

  2. 
  Larva 
  from 
  Ham 
  es 
  SALAHiNf 
  (taken 
  on 
  a 
  Statice, 
  apparently 
  S. 
  limonium). 
  

   — 
  Intermediate 
  between 
  larva? 
  of 
  bennetii 
  and 
  staticis. 
  The 
  front 
  horns 
  rather 
  

   smaller, 
  and 
  a 
  vestige 
  of 
  the 
  horn 
  behind 
  them 
  can 
  be 
  traced. 
  The 
  horn 
  on 
  the 
  

   9th 
  abdominal 
  has 
  a 
  wide 
  single 
  base, 
  and 
  this 
  carries 
  two 
  separate 
  little 
  horns. 
  

  

  3. 
  Adacttlus 
  staticis. 
  — 
  Differs 
  very 
  little 
  from 
  larva 
  of 
  A. 
  bennetii. 
  the 
  chief 
  

   difference 
  being 
  that 
  the 
  caudal 
  horn 
  is 
  divided, 
  so 
  that 
  the 
  two 
  terminal 
  hairs 
  of 
  

   A. 
  bennetii 
  are 
  in 
  A. 
  staticis 
  each 
  on 
  a 
  separate 
  small 
  horn, 
  side 
  by 
  side 
  and 
  quite 
  

   distinct 
  from 
  each 
  other, 
  whilst 
  the 
  lateral 
  hairs 
  on 
  the 
  horn 
  of 
  A. 
  bennetii 
  are 
  each 
  

   on 
  a 
  minute 
  horn, 
  in 
  front 
  of 
  the 
  chief 
  one 
  on 
  its 
  own 
  side, 
  the 
  bases 
  of 
  these 
  small 
  

   horns, 
  however, 
  being 
  not 
  quite 
  distinct. 
  The 
  prothoracic 
  horns 
  are 
  rather 
  shorter 
  

   than 
  those 
  of 
  A. 
  bennetii, 
  and 
  have 
  a 
  minute 
  horn 
  behind 
  each. 
  

  

  The 
  following 
  species 
  exhibit 
  greater 
  developments 
  of 
  the 
  fleshy 
  horn- 
  

   like 
  protuberances 
  bearing 
  the 
  tubercles. 
  Of 
  these, 
  however, 
  some 
  have 
  

   the 
  horns 
  confined 
  in 
  some 
  degree 
  to 
  the 
  thoracic 
  segments 
  : 
  — 
  

  

  * 
  These 
  three 
  larvae 
  are 
  very 
  close, 
  and 
  it 
  may 
  be 
  noted 
  that 
  the 
  few 
  larva? 
  of 
  

   A. 
  bennetii 
  in 
  the 
  Walsingham 
  collection 
  show 
  variation 
  in 
  the 
  prothoracic 
  horns, 
  viz., 
  

   (1) 
  The 
  two 
  simple 
  horns. 
  (2) 
  Traces 
  of 
  second 
  horns 
  behind 
  these. 
  (3) 
  The 
  four 
  

   horns 
  on 
  a 
  definite 
  ring-like 
  ridge. 
  This 
  latter 
  is 
  a 
  deviation 
  from 
  normal 
  A. 
  bennetii 
  

   greater 
  than 
  that 
  shown 
  in 
  the 
  prothoracic 
  structure 
  of 
  A. 
  staticis. 
  [These 
  variations 
  

   are 
  also 
  to 
  be 
  observed 
  in 
  Essex 
  larva?.] 
  (Chapman). 
  

  

  f 
  The 
  spelling 
  on 
  this 
  label 
  is 
  very 
  doubtful. 
  It 
  is 
  the 
  larva 
  noted 
  anteci, 
  

   p. 
  128 
  (Chapman). 
  

  

  

  