﻿316 
  

  

  BRITISH 
  LEPIDOPTERA. 
  

  

  but 
  vary 
  much 
  in 
  distinctness 
  and 
  strength, 
  often 
  being 
  quite 
  absent. 
  

   In 
  addition, 
  on 
  the 
  forewings, 
  especially 
  on 
  the 
  fold, 
  in 
  front 
  of 
  the 
  

   fissural 
  dots, 
  and 
  along 
  the 
  costa, 
  are 
  longitudinal 
  rows 
  of 
  black 
  and 
  

   white 
  scales. 
  The 
  outer 
  marginal 
  fringes 
  usually 
  have 
  a 
  whitish, 
  or, 
  at 
  

   any 
  rate, 
  a 
  pale, 
  basal 
  line, 
  in 
  which, 
  at 
  the 
  anal 
  angle 
  of 
  the 
  upper 
  

   segment, 
  there 
  lies 
  usually 
  one, 
  more 
  rarely 
  two, 
  black 
  or 
  dark 
  brown 
  

   dots. 
  There 
  are 
  mostly, 
  in 
  this 
  pale 
  basal 
  line 
  of 
  the 
  lower 
  segment, 
  

   three 
  dark 
  dots, 
  one 
  at 
  the 
  apex, 
  a 
  second 
  a 
  little 
  below 
  this, 
  and 
  a 
  

   third 
  at 
  the 
  anal 
  angle, 
  which 
  is, 
  however, 
  sometimes 
  wanting. 
  The 
  

   fringe 
  dots 
  are 
  sometimes 
  narrow, 
  and 
  sharply 
  marked, 
  sometimes 
  

   paler 
  and 
  more 
  suffused, 
  and 
  then 
  show 
  a 
  tendency 
  to 
  combine, 
  which 
  

   also 
  happens 
  in 
  exceptional 
  cases. 
  In 
  a 
  smaller 
  section, 
  the 
  species 
  have 
  

   a 
  dark 
  brown 
  basal 
  line 
  in 
  the 
  outer 
  marginal 
  fringes 
  of 
  both 
  segments, 
  

   which, 
  however, 
  is 
  occasionally 
  once 
  or 
  twice 
  divided 
  by 
  paler 
  colour. 
  

   The 
  hindwings 
  are 
  always 
  without 
  markings. 
  On 
  the 
  underside, 
  the 
  

   apices 
  of 
  the 
  segments, 
  and 
  the 
  first 
  and 
  the 
  third 
  feathers 
  are 
  more 
  or 
  

   less 
  strongly 
  dusted 
  with 
  white. 
  The 
  white 
  transverse 
  line 
  of 
  the 
  upper 
  

   segment 
  sometimes 
  show 
  7 
  s 
  through 
  on 
  the 
  underside. 
  The 
  head 
  

   always 
  has 
  the 
  same 
  colour 
  as 
  the 
  costal 
  portion 
  of 
  the 
  forewing 
  ; 
  the 
  

   eye 
  is 
  margined 
  above 
  by 
  a 
  fine 
  white 
  line, 
  which 
  is 
  continued 
  on 
  both 
  

   sides 
  of 
  the 
  frontal 
  protuberance 
  along 
  the 
  upper 
  ridge 
  of 
  the 
  palpi 
  

   to 
  their 
  tips. 
  The 
  first, 
  and 
  sometimes 
  also 
  the 
  second, 
  joint 
  of 
  the 
  

   palpi, 
  has 
  a 
  similar 
  narrow 
  white 
  line 
  on 
  its 
  lower 
  edge 
  ; 
  the 
  antenna 
  1 
  

   are 
  brown, 
  but 
  white 
  beneath 
  at 
  the 
  base. 
  The 
  pro- 
  and 
  mesothorax 
  

   have 
  also 
  the 
  same 
  coloration 
  as 
  the 
  costal 
  portion 
  of 
  the 
  forewing, 
  

   while 
  the 
  metathorax 
  shows 
  the 
  coloration 
  of 
  the 
  inner 
  margin. 
  

   Sometimes 
  these 
  different 
  colours 
  are 
  divided 
  by 
  a 
  narrow 
  whitish 
  

   transverse 
  line. 
  The 
  first 
  and 
  second 
  segments 
  of 
  the 
  abdomen 
  have 
  

   the 
  same 
  colour 
  as 
  the 
  metathorax, 
  and 
  are 
  bordered 
  laterally 
  by 
  two, 
  

   broad, 
  white, 
  longitudinal 
  streaks 
  ; 
  the 
  following 
  segments 
  of 
  the 
  

   abdomen, 
  in 
  general 
  coloured 
  as 
  the 
  forewings, 
  are 
  ornamented, 
  

   especially 
  distinctly 
  below, 
  with 
  white, 
  often 
  interrupted, 
  longitudinal 
  

   lines, 
  and 
  with 
  groups 
  of 
  black 
  scales 
  on 
  the 
  posterior 
  margins. 
  The 
  

   legs 
  have 
  about 
  the 
  same 
  coloration 
  as 
  the 
  body 
  and 
  forewings, 
  and 
  are 
  

   similarly 
  marked 
  in 
  all 
  the 
  species. 
  The 
  middle 
  coxas 
  exhibit, 
  on 
  the 
  

   outer 
  side, 
  a 
  broad, 
  silver 
  white 
  band 
  ; 
  the 
  femora 
  are 
  finely 
  edged 
  

   with 
  white 
  on 
  both 
  sides 
  beneath, 
  the 
  front 
  and 
  middle 
  tibise 
  are 
  dark 
  

   above, 
  white 
  beneath, 
  the 
  hind 
  tibise 
  similar 
  above 
  and 
  below, 
  mostly 
  

   dark, 
  the 
  front 
  and 
  middle 
  tar^i 
  dark 
  above, 
  white 
  below, 
  with 
  perhaps 
  

   the 
  exception 
  of 
  the 
  extreme 
  apices, 
  the 
  hind 
  tarsi 
  with 
  the 
  first 
  joint 
  

   daik, 
  and 
  the 
  following 
  whitish. 
  The 
  spurs 
  outwardly 
  dark, 
  inwardly 
  

   white, 
  black 
  at 
  the 
  apex. 
  The 
  markings 
  of 
  the 
  head, 
  thorax, 
  abdomen, 
  

   and 
  legs, 
  are 
  the 
  same 
  in 
  all 
  the 
  species." 
  Hofmann 
  gives 
  (Die 
  

   deutsch. 
  Pteroph., 
  pp. 
  68 
  et 
  seq.), 
  under 
  the 
  name 
  Stenoptilia, 
  the 
  follow- 
  

   ing 
  summary 
  of 
  the 
  structure 
  of 
  the 
  Stenoptiliids 
  : 
  — 
  

  

  Head 
  : 
  Crown 
  flatly-scaled. 
  Forehead 
  extended 
  in 
  a 
  conical 
  flatrscaled 
  pro- 
  

   tuberance, 
  with 
  the 
  anterior 
  margin 
  straight, 
  or 
  very 
  obtusely-angled. 
  Antennas 
  of 
  

   the 
  <f 
  very 
  weakly 
  ciliated. 
  Palpi 
  laterally 
  compressed, 
  longer 
  than 
  the 
  frontal 
  

   prominence, 
  the 
  second 
  joint 
  rough-scaled 
  above, 
  nearly 
  triangular, 
  the 
  third 
  joint 
  

   very 
  small, 
  cylindrical, 
  not 
  reaching 
  beyond 
  apex 
  of 
  second 
  joint. 
  Legs 
  slender. 
  

   Hind 
  tibiae 
  without 
  especial 
  characteristics. 
  Abdomen 
  long 
  and 
  slender, 
  2nd 
  

   and 
  3rd 
  segments 
  much 
  longer 
  than 
  the 
  rest, 
  widened 
  posteriorly 
  in 
  ? 
  . 
  Fore- 
  

   wings 
  cleft 
  to 
  one-third, 
  the 
  segments 
  narrow, 
  with 
  very 
  oblique 
  margin, 
  both 
  with 
  

   more 
  or 
  less 
  distinct 
  anal 
  angle. 
  Feathers 
  of 
  hindwing 
  dissimilar, 
  the 
  first 
  the 
  

  

  