﻿440 
  BRITISH 
  LEPIDOPTERA. 
  

  

  darker 
  yellow-brown 
  in 
  colour, 
  with 
  somewhat 
  brighter 
  and, 
  as 
  a 
  rule, 
  

   narrower, 
  transverse 
  lines 
  across 
  the 
  lobes 
  of 
  the 
  forewings, 
  and 
  with 
  

   a 
  distinct, 
  bent, 
  white 
  line 
  at 
  the 
  base 
  of 
  the 
  fringe 
  before 
  the 
  apex 
  of 
  

   the 
  second 
  lobe. 
  The 
  black 
  scale-tooth 
  also, 
  on 
  the 
  3rd 
  plumule 
  of 
  the 
  

   hindwing, 
  is 
  larger 
  in 
  liieracii. 
  The 
  nearest 
  relative 
  to 
  the 
  latter 
  is 
  

   ericetorum, 
  which 
  has 
  the 
  same 
  dark, 
  almost 
  chestnut-brown, 
  ground 
  

   colour, 
  and 
  the 
  same 
  marking 
  of 
  the 
  hind 
  lobe. 
  These 
  two 
  species, 
  

   however, 
  differ 
  from 
  each 
  other 
  in 
  that 
  the 
  scale-tuft 
  on 
  the 
  3rd 
  

   plumule 
  of 
  the 
  hindwing, 
  which, 
  in 
  liieracii, 
  does 
  not 
  reach 
  the 
  apex 
  

   of 
  the 
  plumule, 
  and 
  in 
  which 
  the 
  costal 
  (upper 
  marginal) 
  scales 
  in 
  the 
  

   neighbourhood 
  of 
  this 
  tuft 
  form 
  only 
  a 
  narrow 
  line, 
  which 
  contributes 
  

   little 
  to 
  the 
  size 
  of 
  the 
  tuft, 
  in 
  ericetorum 
  reaches 
  the 
  apex 
  of 
  the 
  

   plumule, 
  and 
  forms 
  with 
  the 
  broad 
  costal 
  row 
  of 
  scales 
  a 
  large 
  

   roundish 
  spot, 
  which 
  covers 
  the 
  entire 
  apex." 
  Hofmann 
  writes 
  (Die 
  

   Deutsch. 
  Pteroph.j 
  p. 
  107) 
  : 
  " 
  Pilosellae 
  is 
  very 
  close 
  to 
  0. 
  liieracii, 
  

   smaller, 
  more 
  cinnamon-red 
  ; 
  the 
  outer 
  marginal 
  fringes 
  of 
  the 
  lower 
  

   lobe 
  have 
  a 
  dull 
  white, 
  or 
  more 
  yellowish, 
  basal 
  line. 
  The 
  best 
  dis- 
  

   tinguishing 
  character 
  is 
  formed 
  by 
  the 
  black 
  scales 
  of 
  the 
  3rd 
  plumule. 
  

   These 
  are 
  similar 
  to 
  those 
  of 
  0. 
  liieracii, 
  but 
  weaker 
  and 
  shorter, 
  

   especially 
  on 
  the 
  inner 
  margin 
  ; 
  on 
  the 
  costa 
  they 
  do 
  not 
  run 
  quite 
  up 
  

   to 
  the 
  apex, 
  which 
  bears 
  whitish 
  scales 
  on 
  both 
  sides, 
  and 
  only 
  has 
  a 
  

   few 
  black 
  scales 
  at 
  the 
  extreme 
  end 
  of 
  the 
  inner 
  margin; 
  on 
  the 
  costa, 
  

   however, 
  they 
  run 
  towards 
  the 
  base 
  somewhat 
  further 
  than 
  on 
  the 
  

   inner 
  margin. 
  In 
  0. 
  liieracii, 
  on 
  the 
  contrary, 
  the 
  black 
  scales 
  of 
  the 
  

   costa 
  run 
  up 
  to 
  the 
  apex 
  of 
  the 
  plumule, 
  so 
  that 
  only 
  a 
  very 
  few 
  white 
  

   scales 
  remain 
  among 
  the 
  rest, 
  while 
  the 
  black 
  scales 
  do 
  not 
  run 
  further 
  

   towards 
  the 
  base 
  than 
  on 
  the 
  inner 
  margin. 
  With 
  worn 
  specimens 
  

   these 
  characters 
  are, 
  of 
  course, 
  easily 
  lost. 
  Palpi 
  as 
  in 
  0. 
  liieracii.' 
  " 
  

   Writing 
  of 
  0. 
  liieracii 
  (op. 
  cit., 
  p. 
  108), 
  he 
  further 
  says 
  that 
  this 
  species 
  

   is 
  " 
  usually 
  somewhat 
  larger 
  (expanse 
  11mm.) 
  than 
  0. 
  pilosellae, 
  dark 
  

   red-brown, 
  almost 
  chestnut-brown, 
  with 
  pure 
  white, 
  somewhat 
  shining, 
  

   markings. 
  The 
  basal 
  line 
  of 
  the 
  outer 
  marginal 
  fringes 
  of 
  the 
  lower 
  

   lobe 
  is 
  usually 
  sharp 
  and 
  pure 
  white, 
  occasionally, 
  however, 
  somewhat 
  

   tinged 
  with 
  yellow, 
  and, 
  in 
  many 
  examples, 
  becoming 
  obsolete 
  on 
  

   reaching 
  the 
  centre 
  of 
  the 
  outer 
  margin. 
  The 
  black 
  scales 
  of 
  the 
  

   third 
  plumule 
  of 
  the 
  hindwing 
  are 
  shorter 
  on 
  the 
  costa 
  and 
  placed 
  

   very 
  obliquely, 
  on 
  the 
  inner 
  margin 
  almost 
  vertical, 
  very 
  long 
  towards 
  

   the 
  base, 
  becoming 
  gradually 
  shorter 
  towards 
  the 
  apex, 
  so 
  that 
  they 
  

   form 
  a 
  tooth-like 
  projection 
  ; 
  they 
  extend 
  along 
  the 
  costa 
  up 
  to 
  the 
  

   apex, 
  but 
  towards 
  the 
  base 
  not 
  further 
  than 
  the 
  scales 
  on 
  the 
  inner 
  

   margin. 
  At 
  the 
  apex 
  of 
  the 
  plumule 
  there 
  are 
  only 
  a 
  few 
  little 
  scales, 
  

   and 
  one 
  pair 
  of 
  thick 
  deep 
  black 
  scales 
  directed 
  downwards, 
  which 
  are 
  

   usually 
  closely 
  in 
  touch 
  with 
  the 
  scales 
  of 
  the 
  costa, 
  but 
  separated 
  

   from 
  those 
  of 
  the 
  inner 
  margin 
  by 
  a 
  short 
  interval 
  in 
  which 
  the 
  

   fringes 
  are 
  whitish-coloured 
  at 
  the 
  base. 
  Palpi 
  brown, 
  edged 
  with 
  

   white 
  below, 
  with 
  a 
  distinct 
  tuft 
  of 
  hairs 
  on 
  the 
  second 
  joint." 
  

  

  [Original 
  description 
  of 
  Oxyptilus 
  hieracii, 
  Zeller. 
  — 
  Pterophorus 
  

   liieracii. 
  Alis 
  anterioribus 
  brunneis, 
  laciniis 
  niveo-bistrigatis, 
  ciliis 
  

   costas 
  ante 
  apicem 
  exalbidis, 
  arcu 
  lacinias 
  posterioris 
  marginali 
  

   albido 
  ; 
  digiti 
  tertii 
  dorso 
  ante 
  apicem 
  atro-squamato.* 
  Forewings 
  

  

  * 
  Forewings 
  red-brown 
  ; 
  lobes 
  with 
  two 
  snowy 
  strigas 
  ; 
  cilia 
  of 
  the 
  costa 
  before 
  

   the 
  apex 
  yellowish- 
  white 
  ; 
  a 
  whitish 
  bow 
  on 
  the 
  margin 
  of 
  the 
  lower 
  lobe 
  ; 
  the 
  

   fringe 
  of 
  the 
  3rd 
  plumule 
  black-scaled 
  before 
  the 
  apex. 
  

  

  