﻿134 
  BRITISH 
  LEPIDOPTERA. 
  

  

  on 
  the 
  9th 
  abdominal 
  ; 
  there 
  is 
  no 
  accentuation 
  on 
  either 
  the 
  8th 
  or 
  9th. 
  The 
  

   prolegs 
  have 
  large 
  swollen 
  hairs. 
  [The 
  remarkably 
  high 
  position 
  behind 
  spiracle 
  

   of 
  iv, 
  as 
  in 
  H. 
  tamaricis, 
  and 
  less 
  so 
  in 
  some 
  others, 
  makes 
  it 
  fairly 
  certain 
  that 
  this 
  

   is 
  an 
  Agdistid.] 
  

  

  As 
  we 
  have 
  already 
  noted, 
  the 
  Agdistid 
  pupa 
  is 
  long 
  and 
  slender, 
  but 
  

   in 
  its 
  general 
  features 
  and 
  mode 
  of 
  attachment 
  is 
  quite 
  of 
  the 
  Alucitid 
  

   type. 
  We 
  note 
  that 
  the 
  second 
  and 
  third 
  legs 
  project 
  as 
  one 
  column 
  quite 
  

   free 
  beyond 
  the 
  wing 
  attachment 
  to 
  the 
  3rd 
  abdominal 
  segment, 
  the 
  

   column 
  containing 
  at 
  its 
  base 
  laterally 
  a 
  point 
  (really 
  the 
  apex) 
  of 
  the 
  

   wings, 
  and 
  extending 
  to 
  the 
  end 
  of 
  the 
  6th 
  abdominal 
  segment. 
  A 
  

   trace 
  of 
  the 
  labial 
  palpi 
  is 
  seen 
  centrally 
  between 
  maxillae, 
  and 
  there 
  

   is 
  a 
  space 
  (possibly 
  femoral) 
  between 
  the 
  maxillae 
  and 
  first 
  leg. 
  

  

  Meyrick 
  gives 
  {Trans. 
  Ent. 
  Soc. 
  Lond., 
  1890, 
  p. 
  486) 
  the 
  following 
  

   diagnosis 
  of 
  the 
  structural 
  peculiarities 
  of 
  the 
  Agdistid 
  imago 
  :- 
  — 
  

  

  Face 
  with 
  more 
  or 
  less 
  developed 
  horny 
  prominence 
  ; 
  ocelli 
  distinct 
  ; 
  tongue 
  

   developed. 
  Antennas 
  four-fifths, 
  in 
  j 
  filiform, 
  shortly 
  ciliated. 
  Labial 
  palpi 
  

   moderate, 
  ascending, 
  second 
  joint 
  with 
  rough 
  projecting 
  scales 
  beneath, 
  terminal 
  

   joint 
  short. 
  Maxillary 
  palpi 
  obsolete. 
  Tibia? 
  simple, 
  outer 
  spurs 
  one-half 
  inner. 
  

   Forewings 
  entire 
  ; 
  vein 
  2 
  from 
  near 
  angle, 
  3 
  and 
  4 
  approximated 
  or 
  stalked, 
  5 
  

   widely 
  remote 
  from 
  4, 
  from 
  near 
  middle 
  of 
  transverse 
  vein, 
  7 
  from 
  near 
  8, 
  8 
  and 
  9 
  

   stalked, 
  10 
  from 
  near 
  8, 
  or 
  sometimes 
  8 
  separate, 
  9 
  and 
  10 
  stalked, 
  or 
  all 
  three 
  

   separate. 
  Hindwings 
  entire, 
  on 
  lower 
  margin 
  of 
  cell 
  beneath 
  with 
  a 
  peel 
  en 
  of 
  dense 
  

   scales 
  in 
  disc, 
  and 
  inner 
  margin 
  roughened 
  beneath 
  with 
  scales 
  ; 
  vein 
  2 
  from 
  

   middle 
  of 
  cell, 
  3 
  and 
  4 
  approximated 
  at 
  base, 
  5 
  absent, 
  6 
  remote 
  from 
  7, 
  8 
  shortly 
  

   approximated 
  to 
  7, 
  posteriorly 
  divergent. 
  

  

  To 
  this 
  Hofmann 
  adds 
  (Die 
  deutschen 
  Pteroph., 
  p. 
  27): 
  — 
  "On 
  

   the 
  forewings 
  an 
  unicolorous 
  and 
  thinly-scaled 
  discal 
  field 
  may 
  be 
  

   differentiated 
  ; 
  this 
  commences 
  broadly 
  on 
  the 
  outer 
  margin 
  and 
  runs 
  to 
  

   a 
  pointed 
  end 
  at 
  about 
  two-thirds 
  the 
  length 
  of 
  the 
  wing, 
  while 
  the 
  costa 
  

   and 
  inner 
  margin 
  are 
  much 
  more 
  thickly 
  scaled. 
  The 
  markings 
  consist 
  

   of 
  small 
  dark 
  points 
  or 
  little 
  streaks 
  in 
  special 
  situations, 
  namely, 
  3-4 
  

   in 
  the 
  costal 
  fringes 
  and 
  one 
  each 
  in 
  the 
  apex 
  of 
  the 
  discal 
  field, 
  in 
  

   the 
  middle 
  of 
  the 
  lower 
  margin, 
  and 
  in 
  the 
  upper, 
  as 
  well 
  as 
  in 
  the 
  

   lower, 
  angle 
  of 
  the 
  discoidal 
  cell. 
  Hindwings 
  without 
  markings. 
  On 
  

   the 
  underside 
  of 
  the 
  forewings 
  the 
  pale 
  costa 
  with 
  the 
  dark 
  points 
  is 
  

   visible 
  ; 
  the 
  apex 
  of 
  the 
  forewing 
  and 
  of 
  the 
  hindwdng 
  as 
  far 
  as 
  M^ 
  

   and 
  the 
  folding 
  part 
  of 
  the 
  hindw 
  r 
  ing, 
  thickly 
  scaled 
  with 
  black 
  and 
  

   white, 
  because 
  these 
  parts 
  are 
  exposed 
  to 
  the 
  light 
  when 
  the 
  wings 
  are 
  

   folded. 
  Abdomen 
  from 
  the 
  3rd 
  segment 
  w 
  7 
  ith 
  two 
  small 
  black 
  spots 
  

   in 
  the 
  median 
  line 
  on 
  the 
  hind 
  margin 
  of 
  each 
  segment. 
  Legs 
  without 
  

   markings." 
  

  

  Meyrick 
  appears 
  to 
  have 
  recognised, 
  on 
  imaginal 
  characters, 
  that 
  

   there 
  was 
  room 
  for 
  considerable 
  subdivision 
  within 
  the 
  group, 
  for 
  he 
  

   remarks 
  (Tram. 
  Ent. 
  Soc. 
  Lond., 
  1890, 
  p. 
  486) 
  that 
  the 
  Agdistid 
  

   " 
  species 
  are 
  very 
  similar 
  superficially, 
  but 
  they 
  include 
  remarkable 
  

   variations 
  in 
  structure 
  . 
  . 
  . 
  The 
  occasional 
  separation 
  of 
  veins 
  8 
  and 
  9 
  

   of 
  the 
  f 
  orewings 
  is 
  only 
  paralleled 
  in 
  this 
  group 
  in 
  the 
  Sicalodidae 
  . 
  . 
  . 
  

   The 
  differences 
  in 
  the 
  frontal 
  prominence, 
  w 
  T 
  hich 
  are 
  considerable, 
  are 
  

   of 
  value 
  in 
  specific 
  distinction."" 
  These 
  differences 
  he 
  does 
  not 
  w 
  T 
  ork 
  

   out, 
  it 
  w 
  T 
  ould 
  be 
  interesting 
  to 
  know 
  if 
  they 
  coincided 
  with 
  the 
  larval 
  

   differences. 
  

  

  * 
  Meyrick, 
  having 
  got 
  so 
  far 
  as 
  this, 
  asserts 
  that 
  " 
  there 
  is 
  no 
  necessity 
  for 
  

   generic 
  subdivision," 
  because 
  he 
  thinks 
  the 
  divergent 
  forms 
  "will 
  eventually 
  be 
  

   connected 
  by 
  transitional 
  forms," 
  a 
  very 
  lame 
  conclusion 
  it 
  appears 
  to 
  us. 
  

  

  