﻿13 
  

  

  •widely 
  severs 
  sat.itnia)ia 
  and 
  phinibana 
  {iiliccnia) 
  from 
  the 
  genus 
  

   Dic/iiorawpha, 
  though 
  not 
  belonging 
  to 
  this 
  genus 
  they 
  appear 
  very 
  

   closely 
  allied 
  to 
  it. 
  Again 
  he 
  places 
  fmctifaaciana 
  and 
  other 
  species 
  

   in 
  the 
  same 
  family 
  as 
  the 
  Eiipccciiifc, 
  though 
  they 
  are 
  distinctly 
  

   separated 
  from 
  these. 
  

  

  I 
  have 
  already 
  alluded 
  to 
  Meyrick's 
  classification. 
  Here 
  it 
  

   appears 
  strange 
  to 
  me 
  that 
  species 
  like 
  pmniana, 
  lacunana 
  and 
  

   antiqtiana 
  should 
  all 
  belong 
  to 
  the 
  same 
  genus, 
  Kttcosma, 
  and 
  still 
  

   more 
  surprising 
  that 
  such 
  species 
  as 
  henniianniana, 
  forsteraua 
  and 
  

   virgaiireona 
  are 
  all 
  placed 
  in 
  the 
  same 
  genus, 
  Tortrix. 
  I 
  cannot 
  

   help 
  thinking 
  that 
  structure 
  may 
  not 
  be 
  the 
  sole 
  arbiter 
  in 
  deciding 
  the 
  

   descent 
  of 
  a 
  species. 
  Though 
  on 
  the 
  other 
  hand 
  one 
  can 
  conceive 
  

   the 
  case 
  of 
  two 
  species 
  originally 
  derived 
  from 
  the 
  same 
  ancestor 
  

   gradually 
  by 
  adaptation 
  to 
  quite 
  different 
  surroundings 
  becoming 
  

   quite 
  distinct 
  in 
  habit 
  and 
  even 
  in 
  appearance. 
  

  

  The 
  moths 
  themselves 
  all 
  seem 
  closely 
  allied 
  ; 
  we 
  do 
  not 
  find 
  those 
  

   distinctly 
  separated 
  families, 
  which 
  we 
  meet 
  with 
  in 
  the 
  Tineina. 
  

   Yet 
  there 
  appear 
  to 
  be 
  three 
  dift'erent 
  types 
  at 
  least. 
  Those 
  species 
  

   with 
  an 
  ocellus 
  such 
  as 
  jwuhleriana 
  and 
  ulicetana, 
  which 
  rest 
  with 
  

   their 
  wings 
  like 
  a 
  " 
  mansade 
  " 
  roof, 
  or 
  with 
  the 
  forewings 
  pinched 
  in 
  

   at 
  the 
  apex. 
  Secondly, 
  those 
  often 
  larger 
  species 
  without 
  any 
  trace 
  

   of 
  the 
  ocellus, 
  like 
  ribeana 
  and 
  crUtana 
  that 
  rest 
  with 
  their 
  wings 
  

   flat 
  ; 
  both 
  the 
  first 
  and 
  second 
  types 
  have 
  the 
  central 
  fascia, 
  when 
  

   present, 
  running 
  diagonally 
  across 
  the 
  forewing. 
  The 
  third 
  type 
  

   comprises 
  those 
  species 
  which 
  have 
  a 
  central 
  fascia 
  running 
  parallel 
  

   with 
  the 
  hind 
  margin. 
  What 
  species 
  I 
  have 
  met 
  with 
  of 
  this 
  type 
  

   rest 
  with 
  wings 
  held 
  like 
  a 
  sloping 
  roof, 
  such 
  as 
  snieatlnnanniana 
  

   and 
  cnrvistri(jana. 
  One 
  of 
  the 
  most 
  interesting 
  features 
  is 
  the 
  

   tendency 
  of 
  perhaps 
  the 
  majority 
  of 
  species 
  to 
  variation. 
  One 
  can 
  

   understand 
  a 
  species 
  varying 
  in 
  dift'erent 
  localities, 
  but 
  here 
  we 
  find 
  

   a 
  moth, 
  like 
  the 
  common 
  elm-feeding 
  tmnacidana, 
  in 
  great 
  variety 
  

   flying 
  round 
  the 
  same 
  tree, 
  or 
  we 
  obtain 
  four 
  quite 
  ditTerent 
  forms 
  of 
  

   contaniinana 
  from 
  the 
  same 
  hawthorn 
  hedge. 
  Then 
  again 
  some 
  

   species 
  run 
  into 
  each 
  other 
  so 
  closely 
  that 
  Mr. 
  Pierce 
  says 
  he 
  cannot 
  

   be 
  sure 
  of 
  them 
  till 
  the 
  genitalia 
  have 
  been 
  examined. 
  The 
  

   Cnejihasia 
  give 
  us 
  an 
  example 
  of 
  this. 
  There 
  is 
  frequently 
  a 
  very 
  

   great 
  difterence 
  between 
  the 
  sexes 
  and 
  apart 
  from 
  the 
  costal 
  fold 
  

   the 
  markings 
  are 
  sometimes 
  distinct, 
  as 
  we 
  see 
  in 
  aiKjiistini-ana 
  and 
  

   lo)if/a)ia. 
  

  

  Though 
  the 
  larvfe 
  appear 
  to 
  have 
  some 
  specific 
  characters 
  yet 
  

   they 
  often 
  seem 
  hard 
  to 
  describe 
  because 
  they 
  have 
  no 
  definite 
  

   points. 
  The 
  appearance 
  of 
  the 
  anal 
  shield 
  and 
  the 
  disposition 
  of 
  

   the 
  hairs 
  upon 
  it 
  appear 
  to 
  me 
  worthy 
  oi 
  attention, 
  while 
  on 
  the 
  

   other 
  hand 
  the 
  colour 
  or 
  markings 
  of 
  the 
  head 
  vary 
  in 
  the 
  same 
  

   species. 
  Owing 
  to 
  the 
  delicacy 
  of 
  the 
  skin 
  the 
  testes 
  of 
  the 
  larva 
  

   may 
  frequently 
  be 
  observed, 
  thus 
  enabling 
  us 
  to 
  ascertain 
  the 
  sex, 
  

   which 
  is 
  often 
  useful. 
  When 
  we 
  take 
  up 
  a 
  new 
  study 
  we 
  often 
  

   make 
  great 
  progress 
  at 
  first, 
  but 
  as 
  we 
  go 
  on 
  we 
  find 
  the 
  advance 
  

  

  