﻿Lepidoptera 
  collected 
  in 
  Madeira. 
  213 
  

  

  Acidalia 
  maderce, 
  n. 
  sp. 
  

   Both 
  primaries 
  and 
  secondaries 
  are 
  of 
  the 
  same 
  hue, 
  and 
  have 
  

   the 
  same 
  markings 
  carried 
  through 
  them. 
  The 
  colour 
  is 
  ochreous 
  

   grey, 
  without 
  any 
  markings 
  before 
  the 
  dark 
  central 
  spot 
  ; 
  behind 
  

   this 
  is 
  a 
  fairly 
  distinct 
  but 
  ill-defined 
  darkish 
  broad 
  transverse 
  

   stripe, 
  beyond 
  which 
  is 
  an 
  oblique 
  wavy 
  greyish 
  line 
  ; 
  midway 
  

   between 
  this 
  and 
  the 
  posterior 
  margin 
  is 
  the 
  broader 
  subterminal 
  

   greyish 
  line. 
  The 
  margin 
  itself 
  is 
  very 
  finely 
  and 
  darkly 
  edged, 
  

   and 
  is 
  very 
  slightly 
  scalloped. 
  Fringes 
  same 
  hue 
  as 
  wings. 
  

   AntennsD 
  slightly 
  pubescent. 
  Exp. 
  alar. 
  23 
  mm. 
  

  

  I 
  have 
  two 
  females 
  from 
  Madeira 
  proper. 
  

  

  Acidalia 
  dimidiata, 
  Hufn. 
  (scuhdata, 
  W. 
  V.). 
  

  

  Common 
  and 
  very 
  variable. 
  I 
  have 
  but 
  one 
  specimen 
  

   of 
  the 
  type 
  we 
  usually 
  find 
  in 
  England 
  ; 
  there 
  are, 
  how- 
  

   ever, 
  several 
  somewhat 
  similar 
  in 
  general 
  tone, 
  but 
  they 
  

   have 
  a 
  very 
  broad 
  blackish 
  band 
  all 
  across 
  the 
  centre 
  of 
  

   the 
  primaries, 
  and 
  extending 
  in 
  like 
  manner 
  through 
  

   the 
  secondaries. 
  Another 
  very 
  prevalent 
  (in 
  fact, 
  the 
  

   commonest) 
  form 
  is 
  much 
  darker 
  than 
  usual, 
  and 
  also 
  

   larger, 
  and 
  of 
  the 
  ordinary 
  pattern, 
  with 
  the 
  addition 
  of 
  

   an 
  indistinct 
  band 
  across 
  the 
  central 
  area. 
  

  

  Acidalia 
  atlantica, 
  Stainton, 
  (non 
  atlantica, 
  Walker). 
  

  

  " 
  Walker's 
  name 
  atlantica 
  must 
  now 
  sink 
  as 
  a 
  synonym 
  

   of 
  A. 
  separata, 
  Walk. 
  Mr. 
  Warren, 
  who 
  has 
  recently 
  

   gone 
  through 
  the 
  Geometrcs 
  in 
  the 
  National 
  Collection, 
  

   considers 
  Acidalia 
  separata, 
  Walker, 
  and 
  atlantica, 
  

   Walker, 
  both 
  from 
  St. 
  Helena, 
  in 
  the 
  Wollaston 
  cabinet, 
  

   to 
  be 
  one 
  and 
  the 
  same 
  species, 
  in 
  which 
  opinion 
  I 
  have 
  

   not 
  any 
  doubt 
  that 
  he 
  is 
  correct, 
  for 
  it 
  would 
  be 
  im- 
  

   possible 
  to 
  separate 
  some 
  of 
  the 
  specimens, 
  and 
  the 
  

   main 
  markings 
  are 
  all 
  identical. 
  Walker's 
  name 
  

   atlantica, 
  therefore, 
  sinks 
  as 
  a 
  synonym 
  of 
  separata, 
  

   whilst 
  Stainton' 
  s 
  name 
  for 
  the 
  Madeira 
  species 
  remains 
  

   good." 
  

  

  This 
  species 
  was 
  described 
  by 
  Mr. 
  Stainton 
  in 
  the 
  

   Ann. 
  & 
  Mag. 
  Nat. 
  Hist., 
  3rd 
  series, 
  vol. 
  iii. 
  (1859), 
  

   p. 
  210, 
  where 
  he 
  says 
  : 
  — 
  " 
  Allied 
  to 
  Acidalia 
  virgularia, 
  

   but 
  paler 
  and 
  neater 
  ; 
  the 
  three 
  lines 
  parallel, 
  and 
  dis- 
  

   tinctly 
  angulated 
  towards 
  the 
  costa 
  ; 
  the 
  discoidal 
  spot 
  

  

  q2 
  

  

  