﻿222 
  BRITISH 
  LEPIDOPTERA. 
  

  

  "types" 
  disagree 
  with 
  descriptions, 
  one 
  must 
  follow 
  the 
  descriptions 
  and 
  not 
  

   the 
  types.] 
  

  

  Original 
  description. 
  — 
  Blass 
  rothlichtgelbes 
  Geistchen 
  (SchifTer- 
  

   miiller 
  and 
  Denis). 
  [Hiibner's 
  figure 
  (Eur. 
  Schmett., 
  Alu. 
  pi. 
  iii., 
  fig. 
  

   12) 
  represents 
  a^ 
  ; 
  the 
  anterior 
  wings 
  pointed, 
  of 
  a 
  rather 
  deep 
  yellow 
  

   ground 
  colour, 
  a 
  reddish 
  shade 
  extending 
  from 
  the 
  costa 
  (about 
  one- 
  

   third 
  from 
  apex) 
  to 
  the 
  internal 
  edge 
  of 
  the 
  cleft 
  of 
  the 
  anterior 
  wings, 
  

   the 
  internaledge 
  of 
  this 
  shade 
  gradually 
  toning 
  down 
  towards 
  the 
  

   centre 
  of 
  the 
  wing, 
  the 
  inner 
  part 
  of 
  the 
  wing 
  slightly 
  shaded 
  with 
  

   reddish 
  ; 
  the 
  hindwings 
  yellow-ochreous 
  ; 
  head, 
  thorax, 
  and 
  abdomen 
  

   of 
  the 
  same 
  colour 
  as 
  the 
  wings. 
  Fig. 
  13 
  is 
  that 
  of 
  a 
  ? 
  , 
  with 
  the 
  apex 
  

   more 
  pointed, 
  the 
  ground 
  colour 
  paler 
  yellow, 
  with 
  more 
  reddish 
  

   shading, 
  a 
  shade 
  from 
  the 
  costa 
  to 
  end 
  of 
  fissure 
  in 
  anterior 
  wings, 
  as 
  

   in 
  $ 
  , 
  another 
  nearer 
  apex 
  of 
  wing, 
  and 
  another 
  nearer 
  body 
  ; 
  hind- 
  

   wings 
  dark 
  greyish. 
  Herrich-Schaffer 
  gives 
  (Sys. 
  Bearb., 
  v., 
  p. 
  367) 
  

   the 
  first 
  really 
  separable 
  description 
  of 
  the 
  species 
  : 
  " 
  Ochrodactylus, 
  

   Hb., 
  figs. 
  12, 
  13. 
  The 
  apex 
  of 
  the 
  forewings 
  not 
  markedly 
  sickle- 
  

   shaped, 
  fresh 
  examples 
  are 
  brightly 
  coloured 
  and 
  marked 
  (Supp. 
  fig. 
  3). 
  

   Lin. 
  11-13. 
  Ochraceus, 
  ferrugineo-nebulosis. 
  Ochreous-yellow, 
  

   clouded 
  with 
  rust-brown, 
  the 
  costal 
  triangular 
  spot 
  of 
  the 
  following 
  

   species 
  not 
  so 
  distinctly 
  defined, 
  the 
  apex 
  of 
  the 
  forewings 
  sickle-shaped. 
  

   Austria 
  and 
  Hungary, 
  Sweden, 
  Livland, 
  Kasan. 
  June 
  and 
  July. 
  

   Among 
  willows 
  and 
  other 
  bushes 
  on 
  the 
  river-banks. 
  Near 
  Eegensburg 
  

   in 
  Weintingen 
  wood. 
  Everywhere 
  rare. 
  Twelve 
  examples 
  from 
  

   Fischer 
  v. 
  Rosslerstamm's 
  collection 
  ; 
  six 
  in 
  my 
  own."] 
  

  

  Imago. 
  — 
  Nearly 
  pure 
  Indian 
  yellow", 
  clearly 
  marked, 
  and 
  streaked 
  

   with 
  a 
  pale 
  shade 
  of 
  the 
  same 
  colour, 
  and 
  with 
  the 
  few 
  costal 
  and 
  

   fringe-markings 
  and 
  spots 
  dark 
  brown 
  to 
  black 
  ; 
  the 
  markings 
  clear 
  

   and 
  decided, 
  with 
  invariably 
  a 
  very 
  clear, 
  small, 
  black 
  spot 
  just 
  below 
  

   the 
  fissure, 
  in 
  some 
  examples 
  also 
  one 
  above 
  united 
  by 
  a 
  brown 
  shade 
  

   (Sang). 
  [See 
  also 
  p. 
  225.] 
  

  

  Sexual 
  dimorphism.— 
  The 
  $ 
  s 
  are 
  decidedly 
  smaller 
  and 
  rather 
  

   paler 
  than 
  the 
  2 
  s. 
  

  

  Variation. 
  — 
  There 
  is 
  considerable 
  difference 
  in 
  the 
  intensity 
  of 
  the 
  

   ground 
  colour 
  and 
  markings, 
  but 
  the 
  special 
  characters 
  of 
  the 
  genitalia 
  

   leave 
  no 
  doubt 
  about 
  the 
  species. 
  The 
  following 
  races 
  have 
  been 
  

   described 
  : 
  

  

  a. 
  var. 
  borgmanni, 
  Ross., 
  " 
  Schppfl.," 
  p. 
  220 
  (1881) 
  ; 
  Hering, 
  loe. 
  cit. 
  (1881): 
  

   Hofmn., 
  "DieDeutsch. 
  Pteroph.," 
  p. 
  58 
  (1895); 
  Staud. 
  and 
  Eeb., 
  "Cat.," 
  3rd 
  

   ed., 
  p. 
  72(1901). 
  Ochrodactyla 
  var., 
  Borgm., 
  "Anleitungz. 
  Schmett.," 
  p. 
  191 
  (1878). 
  

   — 
  A 
  form 
  is 
  to 
  be 
  noticed, 
  which 
  Borgmann 
  obtained 
  from 
  larvae 
  feeding 
  in 
  the 
  

   main 
  stems 
  of 
  Chrysanthemum 
  corymbosum 
  and 
  Senecio 
  sylvaticus, 
  and 
  that 
  appears 
  

   to 
  be 
  like 
  those 
  of 
  typical 
  ochrodactylus, 
  but 
  the 
  pupa 
  of 
  which 
  tended 
  to 
  be 
  red- 
  

   brown 
  in 
  tint 
  and 
  dotted. 
  The 
  imagines 
  are 
  pale 
  bone-yellow, 
  with 
  similar 
  mark- 
  

   ings 
  to 
  ochrodactylus, 
  in 
  which 
  the 
  blackish 
  border 
  line 
  of 
  the 
  forewing 
  stands 
  out 
  

   particularly 
  sharply. 
  If 
  not 
  a 
  distinct 
  species, 
  the 
  form 
  deserves 
  at 
  least 
  to 
  bear 
  

   the 
  name 
  of 
  its 
  discoverer, 
  as 
  var. 
  borgmanni 
  (Rossler). 
  

  

  Eebel 
  (Cat., 
  3rd 
  ed., 
  p. 
  72) 
  makes 
  this 
  a 
  possible 
  form 
  of 
  ochrodactyla, 
  

   with 
  the 
  diagnosis 
  " 
  pallide 
  ossea, 
  distinctius 
  signata." 
  Hofmann, 
  on 
  the 
  

   contrary, 
  makes 
  (Die 
  Deutsch. 
  Pteroph., 
  p. 
  58) 
  it 
  a 
  form 
  of 
  bertrami 
  (palli- 
  

   dactyla). 
  Borgmann's 
  original 
  note 
  appears 
  to 
  read 
  as 
  follows 
  : 
  " 
  In 
  the 
  

  

  * 
  Sang 
  observes 
  (Ent. 
  Mo. 
  Mag., 
  xviii., 
  p. 
  144) 
  that 
  the 
  imagines 
  of 
  dichro- 
  

   dactyla 
  fade 
  out-of-doors 
  very 
  quickly, 
  caught 
  examples 
  are 
  [always 
  Jbleached, 
  

   sometimes 
  almost 
  white. 
  

  

  