﻿9 
  

  

  coalescent 
  in 
  the 
  males 
  than 
  in 
  the 
  females 
  and 
  to 
  a 
  somewhat 
  

   lesser 
  extent 
  ; 
  the 
  transverse 
  lines 
  are 
  practically 
  always 
  present 
  in 
  

   full 
  number, 
  although 
  expansion 
  and 
  coalescence 
  may 
  make 
  their 
  

   definition 
  obscure 
  ; 
  the 
  dominant 
  colour 
  in 
  some 
  examples 
  is 
  yellow 
  

   and 
  in 
  others 
  dark-brown 
  ; 
  there 
  is 
  often 
  complete 
  or 
  almost 
  

   complete 
  coalescence 
  between 
  the 
  outer 
  marginal 
  band 
  and 
  

   transverse 
  line 
  4, 
  only 
  a 
  few 
  dots 
  of 
  the 
  intermediate 
  ground 
  space 
  

   being 
  in 
  evidence 
  ; 
  the 
  third 
  transverse 
  line 
  generally 
  has 
  both 
  the 
  

   outer 
  and 
  inner 
  sides 
  extended 
  in 
  sharp 
  pointed 
  teeth 
  along 
  the 
  

   veins 
  which 
  cross 
  it 
  ; 
  there 
  is 
  considerable 
  difference 
  in 
  the 
  relative 
  

   position 
  of 
  the 
  transverse 
  lines 
  in 
  different 
  specimens, 
  especially 
  

   between 
  1 
  and 
  2 
  and 
  between 
  3 
  and 
  4 
  ; 
  transverse 
  line 
  4 
  is 
  usually 
  

   interrupted 
  in 
  the 
  middle 
  by 
  a 
  light 
  blotch 
  of 
  ground 
  colour 
  which 
  

   either 
  indents 
  or 
  almost 
  cuts 
  it 
  asunder 
  ; 
  the 
  so-called 
  dusting 
  or 
  

   powdering 
  is 
  scarcely 
  so, 
  ib 
  consists 
  of 
  a 
  series 
  of 
  very 
  fine, 
  short, 
  

   curved 
  " 
  scratches 
  " 
  of 
  dark 
  colour, 
  running 
  parallel 
  to 
  the 
  hind- 
  

   margin. 
  

  

  In 
  the 
  Females, 
  the 
  white 
  is 
  often 
  tinged 
  with 
  yellow 
  ; 
  the 
  

   " 
  scratches 
  " 
  (or 
  powdering) 
  are 
  much 
  more 
  of 
  a 
  black-brown 
  than 
  

   in 
  the 
  males 
  ; 
  the 
  transverse 
  lines, 
  although 
  they 
  may 
  be 
  extended, 
  

   never 
  even 
  tend 
  to 
  monopolise 
  the 
  whole 
  wing 
  ; 
  transverse 
  line 
  4 
  

   very 
  rarely 
  expands 
  to 
  include 
  the 
  marginal 
  area 
  ; 
  this 
  line 
  is 
  

   usually 
  the 
  widest, 
  and 
  is 
  generally 
  emphasised 
  in 
  definition 
  by 
  a 
  

   pure 
  white 
  margin 
  on 
  the 
  outer 
  side 
  in 
  both 
  fore- 
  and 
  hindwings 
  ; 
  

   as 
  in 
  the 
  male 
  transverse 
  line 
  3 
  is, 
  usually 
  extended 
  in 
  teeth 
  along 
  

   the 
  vems 
  ; 
  there 
  is 
  only 
  very 
  rarelj' 
  a 
  dark 
  marginal 
  band 
  ; 
  the 
  

   variation 
  of 
  interlineal 
  space 
  is 
  less 
  than 
  in 
  the 
  males 
  ; 
  the 
  light 
  

   ground 
  indentation 
  of 
  line 
  4 
  on 
  the 
  outer 
  side 
  is 
  always 
  conspicuous, 
  

   and 
  in 
  some 
  cases 
  even 
  completely 
  breaks 
  through 
  ; 
  in 
  tbe 
  hindwing 
  

   line 
  1 
  near 
  the 
  base 
  is 
  occasionally 
  absent 
  and 
  line 
  8 
  is 
  occasionally 
  

   obsolescent. 
  

  

  Genus. 
  

  

  The 
  species 
  has 
  been 
  placed 
  in 
  various 
  genera 
  by 
  different 
  

   systematists. 
  

  

  In 
  1819 
  Leach 
  included 
  it 
  in 
  his 
  genus 
  BinxdnH 
  with 
  a 
  large 
  

   number 
  of 
  other 
  Geometers. 
  

  

  In 
  1825 
  Treitschke, 
  " 
  Schm. 
  Eur.," 
  vol. 
  v. 
  (2), 
  p. 
  435, 
  placed 
  it 
  

   with 
  a 
  large 
  number 
  of 
  other 
  Geometers 
  in 
  his 
  genus 
  b'idonio. 
  

  

  In 
  the 
  same 
  year 
  Hiibner, 
  " 
  Verz.," 
  p. 
  296, 
  restricted 
  the 
  genera 
  

   of 
  his 
  predecessors 
  and 
  put 
  nine 
  species 
  only 
  in 
  his 
  genus 
  Peiconia, 
  

   atoiiiaria 
  being 
  the 
  sixth 
  in 
  order. 
  

  

  Finally 
  Lederer, 
  in 
  1853, 
  " 
  Verhand. 
  z.-b. 
  Wien.," 
  vol. 
  iii., 
  

   p. 
  179, 
  231, 
  established 
  tbe 
  genus 
  K)iiaturija, 
  in 
  which 
  he 
  placed 
  

   atoiiiaria 
  alone. 
  

  

  This 
  genus 
  is 
  that 
  in 
  which 
  atoiiiaria 
  is 
  placed 
  at 
  the 
  present 
  

   time 
  in 
  the 
  British 
  Museum 
  series, 
  and 
  as 
  this 
  is 
  probably 
  accepted 
  

   as 
  the 
  result 
  of 
  Mr. 
  Front's 
  study, 
  we 
  may 
  take 
  it 
  as 
  being 
  so 
  far 
  

   up-to-date. 
  

  

  