﻿Ixxi 
  

  

  When 
  the 
  examples 
  of 
  proserpina 
  were 
  separated 
  into 
  sexes 
  

   it 
  became 
  obvious 
  that 
  the 
  lengthening 
  inward 
  of 
  the 
  fore-wing 
  

   spot 
  (bringing 
  about 
  the 
  resemblance 
  to 
  the 
  chief 
  marking 
  

   of 
  eleutho) 
  is 
  carried 
  much 
  further 
  in 
  the 
  females 
  than 
  the 
  

   males, 
  thus 
  following 
  a 
  very 
  general 
  rule 
  in 
  mimicry, 
  viz. 
  

   when 
  the 
  pattern 
  of 
  a 
  mimetic 
  species 
  differs 
  in 
  the 
  two 
  sexes, 
  

   the 
  female 
  is 
  a 
  better 
  mimic 
  than 
  the 
  male. 
  The 
  further 
  

   mimetic 
  advance 
  of 
  the 
  female 
  was 
  associated 
  with 
  a 
  highly 
  

   dyslegnic 
  pattern 
  (Xeyvov, 
  an 
  edge 
  or 
  border; 
  Sva-, 
  bad), 
  

   commonly 
  found 
  in 
  mimetic 
  butterflies 
  in 
  relation 
  to 
  their 
  

   models 
  and 
  in 
  females 
  in 
  relation 
  to 
  their 
  males 
  — 
  generalisa- 
  

   tions 
  illustrated 
  by 
  many 
  examples 
  projected 
  on 
  the 
  screen.* 
  

   The 
  pattern 
  of 
  the 
  male 
  proserpina 
  was 
  less 
  dyslegnic, 
  and 
  

   that 
  of 
  the 
  model 
  eleufJw 
  still 
  less 
  so, 
  parts 
  of 
  it 
  being 
  in 
  fact 
  

   eulegnic 
  {ev-, 
  good). 
  

  

  The 
  mimicry 
  here 
  referred 
  to 
  concerned 
  the 
  fore-wing 
  only. 
  

   In 
  the 
  hind-wing 
  it 
  was 
  possible 
  that 
  eleutho 
  is 
  a 
  mimic 
  of 
  

   proserjyina. 
  One 
  out 
  of 
  Mr. 
  Simmonds' 
  four 
  specimens 
  (that 
  

   of 
  June 
  4) 
  differed 
  in 
  the 
  much 
  higher 
  development 
  of 
  the 
  

   hind-wing 
  submarginal 
  pattern, 
  which 
  in 
  this 
  respect 
  resembled 
  

   forms 
  of 
  eleutho 
  from 
  some 
  other 
  islands. 
  The 
  reduction 
  of 
  

   this 
  pattern 
  in 
  the 
  other 
  three 
  examples 
  as 
  well 
  as 
  in 
  those 
  

   collected 
  by 
  Prof. 
  Gilson 
  promoted 
  a 
  resemblance 
  to 
  proserpina. 
  

  

  It 
  will 
  be 
  noticed 
  that 
  the 
  numbers 
  of 
  eleutho 
  are 
  very 
  small 
  

   as 
  compared 
  with 
  those 
  of 
  2y'^oserpina.'\ 
  . 
  Further 
  collections 
  

   were 
  needed 
  in 
  order 
  to 
  test 
  these 
  proportions 
  : 
  they 
  might 
  

   be 
  seasonal 
  or 
  local. 
  Prof. 
  Gilson"s 
  small 
  series, 
  taken 
  Oct. 
  

   15-16, 
  1897, 
  on 
  Nukulau, 
  a 
  coral 
  island, 
  south 
  of 
  the 
  mouth 
  

   of 
  the 
  Rewa 
  River, 
  S.E. 
  Viti 
  Levu, 
  included 
  one 
  eleutho, 
  five 
  

   proserpina. 
  Another 
  eleutho 
  was 
  captured 
  Oct. 
  8, 
  at 
  Suva. 
  

  

  * 
  For 
  a 
  fuller 
  development 
  of 
  these 
  principles 
  and 
  the 
  introduction 
  

   of 
  the 
  terms 
  dyslegnic, 
  etc., 
  see 
  Proc. 
  Linn. 
  Soc, 
  1915-16, 
  pp. 
  .37-41. 
  

  

  t 
  In 
  a 
  letter 
  written 
  from 
  Waidoi, 
  Oct. 
  18, 
  1919, 
  Mr. 
  Simmonds 
  

   states 
  that 
  after 
  June 
  10 
  " 
  eleutho 
  undoubtedly 
  became 
  relatively 
  more 
  

   common, 
  although 
  never 
  so 
  abundant 
  as 
  proserpina. 
  It 
  is 
  a 
  more 
  deep 
  

   bush 
  species 
  than 
  the 
  other 
  and 
  is 
  still 
  continuing 
  to 
  emerge. 
  When 
  

   crushed 
  the 
  male 
  of 
  eleutho 
  gives 
  off 
  a 
  decidedly 
  pleasant 
  scent 
  like 
  

   cachou. 
  Its 
  flight 
  is 
  rather 
  more 
  like 
  a 
  Nymphaline 
  than 
  a 
  typical 
  

   Euploea. 
  

  

  "Nov. 
  1, 
  1919. 
  To-day 
  I 
  went 
  up 
  into 
  the 
  bush 
  a 
  long 
  way, 
  and 
  

   saw 
  3 
  worn 
  proserpina 
  and 
  1 
  fresh 
  ele^dho." 
  

  

  