﻿ADDENDUM 
  ! 
  HYBRIDISATION 
  IN 
  LEPIDOPTERA. 
  541 
  

  

  possess 
  only 
  25 
  per 
  cent, 
  of 
  spini 
  blood 
  ; 
  some 
  specimens 
  differed, 
  indeed, 
  

   only 
  very 
  slightly 
  from 
  spini 
  larvae. 
  Cocoons. 
  — 
  The 
  cocoons 
  mostly 
  

   agreed 
  completely 
  with 
  those 
  of 
  pavonia, 
  but 
  one 
  specimen, 
  with 
  that 
  

   of 
  spini. 
  The 
  pupae 
  only 
  differed 
  from 
  those 
  of 
  pavonia 
  in 
  the 
  g 
  

   antenna 
  -case 
  being 
  somewhat 
  more 
  expanded, 
  reminding 
  one 
  of 
  spini 
  

   (Frings). 
  

  

  Geometrides. 
  [To 
  p. 
  29.] 
  Hybrid 
  Zonosomas. 
  — 
  Head 
  notes 
  

   (Knt. 
  Bee, 
  xviii., 
  p. 
  47) 
  that, 
  between 
  1901 
  and 
  1904, 
  he 
  obtained 
  

   pairings 
  of 
  Zonosoma 
  orbicularia 
  $ 
  x 
  pendularia 
  2 
  , 
  the 
  reciprocal 
  

   cross 
  Zonosoma 
  pendularia 
  $ 
  X 
  orbicularia 
  2 
  , 
  also 
  Zo?iosoma 
  orbicu- 
  

   laris 
  $ 
  x 
  annulata 
  ? 
  , 
  and 
  its 
  reciprocal 
  cross 
  Zonosoma 
  annulata 
  <? 
  

   X 
  orbicularia 
  2 
  , 
  and 
  lastly 
  Z. 
  orbicularia 
  $ 
  x 
  porata 
  2 
  • 
  All 
  these 
  

   produced 
  fertile 
  eggs 
  and 
  larvae, 
  and, 
  although 
  the 
  larva? 
  of 
  the 
  last- 
  

   named 
  cross 
  unfortunately 
  died 
  when 
  nearly 
  fullfed, 
  owing, 
  apparently, 
  

   to 
  the 
  very 
  wet 
  weather 
  that 
  occurred 
  whilst 
  they 
  were 
  being 
  reared 
  

   (in 
  the 
  open 
  in 
  sleeves), 
  the 
  others 
  produced 
  imagines 
  in 
  due 
  

   course, 
  that 
  of 
  annulata 
  £ 
  x 
  orbicularia 
  2 
  > 
  however, 
  only 
  one 
  

   cripple 
  in 
  1904. 
  Of 
  the 
  others 
  we 
  note 
  : 
  — 
  

  

  la. 
  [To 
  p. 
  80.] 
  Zonosoma 
  hybr. 
  orbiculo-pendula 
  (orbicularia 
  $ 
  

   X 
  pendularia 
  2). 
  — 
  This 
  hybrid 
  follows 
  distinctly 
  the 
  $ 
  parent 
  in 
  its 
  

   general 
  appearance, 
  and 
  would 
  be 
  difficult 
  to 
  separate 
  from 
  orbicularia. 
  

   It 
  has, 
  however, 
  something 
  of 
  the 
  pale 
  colour 
  of 
  pendularia, 
  and 
  the 
  

   fine 
  mottling 
  or 
  peppering 
  that 
  characterises 
  orbicularia 
  is 
  greatly 
  

   reduced, 
  the 
  ground 
  colour 
  being 
  more 
  uniform, 
  although 
  not 
  nearly 
  

   approaching 
  that 
  of 
  pendularia. 
  The 
  general 
  direction 
  and 
  position 
  

   of 
  the 
  markings 
  of 
  the 
  two 
  parent 
  species 
  being 
  much 
  alike, 
  it 
  is 
  

   difficult 
  to 
  seize 
  on 
  any 
  very 
  definite 
  characteristics 
  shown 
  by 
  the 
  

   hybrids 
  in 
  these 
  directions 
  ; 
  but 
  the 
  reduction 
  of 
  the 
  red 
  median 
  band, 
  

   the 
  character 
  of 
  the 
  dotted 
  basal 
  line 
  of 
  forewings, 
  and 
  the 
  dotted 
  

   median 
  line 
  of 
  hindwings, 
  appear 
  somewhat 
  to 
  approach 
  rather 
  those 
  of 
  

   pendularia 
  than 
  of 
  orbicularia; 
  so 
  also 
  does 
  the 
  transverse 
  submarginal 
  

   shade 
  of 
  the 
  forewings, 
  when 
  present 
  ; 
  the 
  median 
  shade 
  of 
  the 
  

   forewings 
  also 
  is 
  incomplete, 
  reaching 
  from 
  the 
  inner 
  margin 
  to 
  just 
  

   beyond 
  the 
  ocellus, 
  as 
  in 
  pendularia. 
  Tutt 
  Coll., 
  3 
  $ 
  s, 
  3 
  2 
  s. 
  In 
  

   June, 
  1902, 
  Head 
  obtained 
  a 
  pairing 
  of 
  orbicularia 
  $ 
  x 
  pendularia 
  2 
  • 
  

   Nearly 
  all 
  the 
  ova 
  were 
  fertile 
  and 
  produced 
  larvae, 
  and 
  between 
  four 
  

   and 
  five 
  dozen 
  imagines 
  emerged 
  in 
  July 
  and 
  August, 
  1902 
  ; 
  two 
  pupae 
  

   that 
  lived 
  until 
  July, 
  1904, 
  died 
  without 
  emerging. 
  

  

  lb. 
  [To 
  p. 
  30.] 
  Zonosoma 
  hybr. 
  pendulo-orbicula 
  (pendularia 
  $ 
  

   X 
  orbicularia 
  2)- 
  — 
  This 
  hybrid 
  is 
  much 
  more 
  characteristic 
  of 
  pendu- 
  

   laria 
  than 
  orbicularia, 
  and 
  is 
  much 
  more 
  intermediate 
  in 
  its 
  appearance 
  

   and 
  general 
  character 
  than 
  its 
  reciprocal 
  orbiculo-pendula. 
  The 
  specimens 
  

   under 
  examination 
  are 
  two 
  $ 
  s, 
  and, 
  although 
  much 
  more 
  uniform 
  in 
  

   the 
  ground 
  colour 
  of 
  the 
  forewings, 
  owing 
  to 
  the 
  reduction 
  of 
  the 
  

   peppering, 
  or 
  mottling, 
  that 
  characterises 
  orbicularia, 
  they 
  still 
  have 
  the 
  

   ground 
  colour 
  rather 
  of 
  the 
  darker 
  shade 
  that 
  characterises 
  the 
  latter 
  

   species. 
  They 
  are 
  ill-marked, 
  and, 
  in 
  this 
  respect, 
  resemble 
  pendularia 
  ; 
  

   so 
  also 
  do 
  they 
  in 
  the 
  thick 
  marginal 
  dotting 
  round 
  the 
  edges 
  o\' 
  all 
  

   the 
  wings. 
  An 
  occasional 
  pendularia 
  character 
  is 
  most 
  marked.,../.. 
  

   the 
  development 
  of 
  a, 
  submarginal 
  shade 
  on 
  the 
  hindwings, 
  for 
  the 
  

   development 
  of 
  which 
  the 
  dotted 
  median 
  transverse 
  line 
  in 
  the 
  hind- 
  

   wings 
  of 
  the, 
  hybrid 
  is 
  placed 
  Dearer 
  the 
  central 
  ocellus 
  than 
  in 
  

   orbiculana^ 
  and, 
  in 
  this 
  respect, 
  follows 
  pendulario, 
  in 
  which 
  there 
  is 
  

  

  