﻿388 
  BRITISH 
  LEPIDOPTERA. 
  

  

  species, 
  but 
  Hofmann 
  (Die 
  Deutsch 
  Pteroph., 
  pp. 
  91-92) 
  rightly 
  

   restricted 
  the 
  genus 
  to 
  its 
  present 
  limits, 
  and 
  diagnosed 
  it 
  as 
  follows 
  : 
  

  

  The 
  scales 
  of 
  the 
  crown, 
  directed 
  downwards 
  between 
  the 
  antennse, 
  form, 
  with 
  

   those 
  of 
  the 
  forehead, 
  an 
  obtuse, 
  very 
  unstable, 
  tuft. 
  Palpi 
  small 
  and 
  thin, 
  1st 
  

   joint 
  below 
  rough-scaled, 
  2nd 
  and 
  3rd 
  smooth-scaled, 
  rather 
  ascending, 
  3rd 
  joint 
  

   rather 
  drooping. 
  Antennas 
  of 
  the 
  c? 
  extremely 
  shortly 
  ciliated. 
  Fore 
  and 
  middle 
  

   tibia? 
  at 
  the 
  end, 
  and 
  hind 
  tibiae 
  in 
  the 
  mid 
  dip, 
  and 
  at 
  the 
  end, 
  very 
  moderately 
  

   thickened 
  with 
  dark 
  scales. 
  Forewings 
  cleft 
  to 
  one-third 
  ; 
  upper 
  segment 
  without 
  

   anal 
  angle, 
  obliquely 
  pointed 
  ; 
  lower 
  segment 
  with 
  distinct 
  anal 
  angle 
  and 
  elongated 
  

   apex. 
  The 
  1st 
  and 
  2nd 
  segments 
  (of 
  hind 
  wings) 
  of 
  the 
  same 
  shape 
  as 
  the 
  upper 
  and 
  

   lower 
  segment 
  of 
  the 
  forewings. 
  The 
  3rd 
  segment 
  linear, 
  without 
  dark 
  scaling 
  on 
  the 
  

   inner 
  margin. 
  When 
  at 
  rest 
  the 
  forewings 
  are 
  not 
  folded, 
  at 
  the 
  most 
  the 
  inner 
  

   margin 
  of 
  the 
  lower 
  segment 
  is 
  bent 
  downwards. 
  The 
  neuration 
  differs 
  from 
  that 
  

   of 
  the 
  genera 
  already 
  noticed 
  in 
  so 
  far 
  that 
  II 
  2 
  (branch 
  10, 
  HS.) 
  is 
  entirely 
  absent 
  

   from 
  the 
  forewings. 
  The 
  common 
  stem 
  of 
  II 
  3 
  and 
  11^ 
  arises 
  from 
  the 
  upper 
  angle 
  

   of 
  the 
  median 
  cell, 
  II 
  5 
  from 
  the 
  very 
  weakly 
  indicated 
  discocellular 
  which 
  runs 
  

   rather 
  vertically. 
  Stem 
  IV 
  has 
  three 
  branches 
  on 
  the 
  forewings 
  and 
  hindwings. 
  

   According 
  to 
  Meyrick, 
  branch 
  3 
  of 
  the 
  hindwings, 
  representing 
  our 
  IV 
  ± 
  , 
  is 
  said 
  to 
  

   be 
  absent, 
  which, 
  however, 
  at 
  least 
  in 
  HI. 
  phaeodactyla 
  is 
  not 
  the 
  case. 
  The 
  typical 
  

   markings, 
  as 
  well 
  as 
  the 
  characteristics 
  of 
  the 
  larva 
  and 
  pupa, 
  may 
  be 
  gathered 
  

   from 
  the 
  description 
  of 
  the 
  only 
  German 
  species. 
  The 
  typical 
  markings 
  of 
  the 
  

   forewings 
  approach 
  those 
  of 
  rhododactyla. 
  

  

  Rebel, 
  who 
  follows 
  Meyrick 
  very 
  strangely 
  in 
  many 
  details, 
  separates 
  

   (Cat., 
  3rd 
  ed., 
  p. 
  75) 
  microdactyla 
  from 
  the 
  true 
  XTarasmarchids, 
  and 
  

   uses 
  Marasmarcha 
  for 
  Innaedactyla, 
  Haw. 
  (phaeodactyla, 
  Hb.), 
  ehren- 
  

   bergiana, 
  Zell., 
  ac/ronim, 
  H.-Sch., 
  rhypodactyla, 
  Stand., 
  trimmatodactyla, 
  

   Chr., 
  and 
  fauna, 
  Mill. 
  

  

  The 
  following 
  larval 
  and 
  pupal 
  characters 
  of 
  the 
  genus 
  may 
  be 
  

   noted 
  : 
  

  

  Larva. 
  — 
  The 
  depression 
  of 
  the 
  prothoracic 
  scutellum 
  inconspicuous, 
  unpig- 
  

   mented 
  (in 
  this 
  respect 
  inclining 
  to 
  Oxyptilines) 
  ; 
  skin-spicules 
  small, 
  spiny, 
  

   closely 
  set, 
  with 
  chitinous 
  bases 
  ; 
  the 
  secondary 
  skin-hairs 
  markedly 
  knobbed 
  at 
  

   the 
  tips, 
  with 
  basal 
  joint 
  well-developed 
  but 
  not 
  perfect, 
  variable 
  in 
  size, 
  some 
  

   being 
  quite 
  as 
  large 
  as 
  the 
  primary 
  tubercular 
  hairs 
  ; 
  the 
  primary 
  hairs 
  on 
  a 
  

   well-defined 
  base, 
  smooth, 
  with 
  blunt 
  tips 
  ; 
  the 
  warts 
  developed 
  almost 
  as 
  in 
  

   Stenoptilia 
  ; 
  tubercles 
  i 
  and 
  ii 
  conjoined 
  into 
  a 
  single 
  wart 
  on 
  the 
  thorax, 
  on 
  the 
  

   abdomen 
  trapezoidal, 
  well 
  apart 
  ; 
  iv 
  and 
  v 
  on 
  the 
  abdominal 
  segment 
  united 
  into 
  a 
  

   wart 
  ; 
  both 
  accessory 
  postspiraculars 
  present, 
  but 
  weakly 
  developed 
  ; 
  vi 
  forms 
  a 
  

   small 
  wart. 
  

  

  Pupa. 
  — 
  No 
  definite 
  nose-spine 
  ; 
  setae 
  long, 
  well-developed 
  (less 
  so 
  than 
  in 
  

   Eucnemidophorinae) 
  ; 
  halberd-shaped 
  dorsal 
  processes 
  very 
  like 
  those 
  of 
  Aviblyp- 
  

   tiliinae, 
  but 
  also 
  with 
  processes 
  dorsal 
  to 
  these 
  (suggesting 
  alliance 
  with 
  

   Oxyptilines). 
  

  

  In 
  the 
  larva 
  the 
  secondary 
  hairs 
  are 
  large 
  on 
  the 
  warts. 
  The 
  warts 
  

   of 
  the 
  Amblyptiliines 
  may 
  easily 
  be 
  regarded 
  as 
  simple 
  tubercular 
  

   setae 
  with 
  a 
  few 
  attendant 
  secondary 
  hairs 
  ; 
  in 
  Marasmareliinae 
  the 
  

   secondary 
  hairs 
  are 
  so 
  much 
  on 
  the 
  same 
  plate 
  as 
  the 
  primary 
  setae 
  

   that 
  the 
  tubercles 
  can 
  hardly 
  be 
  refused 
  the 
  name 
  of 
  warts. 
  

  

  The 
  almost 
  identical 
  appearance 
  of 
  the 
  Marasmarchine 
  and 
  Am- 
  

   blyptiliine 
  pupae 
  shows 
  that 
  the 
  groups 
  are 
  very 
  closely 
  related, 
  whilst 
  

   the 
  differences 
  between 
  them 
  are 
  sufficient 
  to 
  throw 
  the 
  former 
  much 
  

   nearer 
  the 
  Oxyptilines 
  than 
  would 
  otherwise 
  be 
  the 
  case. 
  With 
  the 
  

   Stenoptiliines, 
  Marasmarcha 
  has 
  no 
  very 
  close 
  relationship, 
  although 
  

   it 
  was 
  long 
  placed 
  in 
  the 
  same 
  genus 
  with 
  them. 
  Of 
  this, 
  Hofmann 
  

   says 
  (Die 
  Deutsch. 
  Pteroph., 
  p. 
  92), 
  "The 
  separation 
  of 
  the 
  genus 
  

   from 
  Mimaeseoptilus, 
  Wallgr. 
  (Stenoptilia, 
  Hb.), 
  is 
  perfectly 
  justified 
  

   by 
  the 
  quite 
  different 
  formation 
  of 
  the 
  palpi, 
  the 
  absence 
  of 
  the 
  

   frontal 
  cone, 
  and 
  the 
  different 
  shape 
  of 
  the 
  upper 
  segment 
  of 
  the 
  fore- 
  

  

  

  