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  BRITISH 
  LEPIDOPTERA. 
  

  

  He 
  further 
  notes 
  that 
  Graeser 
  remarked 
  of 
  two 
  ($ 
  and 
  ? 
  ) 
  suspicious 
  

   P. 
  nomion 
  that 
  he 
  had 
  captured 
  at 
  Pokrofka, 
  that 
  he 
  had 
  taken 
  them 
  

   both 
  at 
  a 
  time 
  (early 
  July) 
  when 
  P. 
  bremeri 
  var. 
  graeseri 
  was 
  very 
  

   worn, 
  and 
  typical 
  nomion 
  not 
  on 
  the 
  wing 
  till 
  about 
  14 
  days 
  later. 
  

   This 
  circumstance, 
  and 
  their 
  size, 
  led 
  him 
  to 
  consider 
  them 
  at 
  first 
  

   as 
  early 
  P. 
  nomion, 
  but 
  later 
  he 
  supposed 
  they 
  might 
  be 
  bremeri. 
  

   Dorries 
  also 
  took 
  a 
  pair 
  at 
  Bikin, 
  where 
  also 
  the 
  two 
  species 
  occur. 
  

   He 
  also 
  thought 
  that 
  they 
  were 
  nomion. 
  Honrath, 
  because 
  of 
  these 
  

   peculiarities, 
  and 
  because 
  the 
  specimens 
  occurred 
  where 
  bremeri 
  and 
  

   nomion 
  were 
  both 
  found, 
  and 
  because 
  they 
  were 
  captured 
  between 
  the 
  

   dates 
  of 
  appearance 
  of 
  the 
  species, 
  and 
  further, 
  because 
  Alpheraky 
  had 
  

   recorded 
  pairings 
  between 
  the 
  Parnassiids, 
  considered 
  the 
  specimens 
  

   hybrids. 
  Their 
  peculiarity, 
  he 
  says, 
  consists 
  of 
  their 
  appearing 
  to 
  be 
  

   nomion 
  with 
  the 
  black 
  antennae 
  of 
  bremeri. 
  He 
  further 
  refers 
  to 
  a 
  note 
  

   by 
  Streckfuss 
  (op. 
  cit., 
  1887, 
  p. 
  xi) 
  noting 
  that 
  he 
  had 
  taken 
  apollo 
  with 
  

   antenna? 
  ringed 
  like 
  those 
  of 
  delius 
  at 
  Muhlwald-Thal, 
  at 
  3500ft. 
  eleva- 
  

   tion, 
  where 
  delius 
  and 
  apollo 
  were 
  flying 
  in 
  company. 
  These 
  he 
  thinks 
  

   may 
  be 
  hybrids. 
  He 
  then 
  goes 
  on 
  to 
  describe 
  two 
  possible 
  hybrid 
  

   specimens 
  between 
  rhoclius 
  and 
  apollonius 
  taken 
  by 
  Grum-Grshimailo. 
  

   None 
  of 
  the 
  evidence 
  appears 
  to 
  be 
  at 
  all 
  conclusive. 
  That 
  of 
  Frings 
  (Soc. 
  

   Ent., 
  xix., 
  p. 
  52) 
  who 
  describes 
  a 
  S 
  Parnassius 
  taken 
  in 
  the 
  Valais 
  in 
  

   July 
  1904, 
  as 
  possibly 
  a 
  hybrid 
  between 
  apollo 
  and 
  delius, 
  is 
  equally 
  

   unsatisfactory. 
  

  

  Arctiides. 
  — 
  Attempts 
  to 
  hybridise 
  Arctiides 
  appear 
  up 
  to 
  the 
  

   present 
  to 
  have 
  failed, 
  except 
  in 
  five 
  instances, 
  in 
  producing 
  

   imagines. 
  Standfuss 
  records 
  (Handbuch, 
  &c, 
  p. 
  56) 
  having 
  obtained 
  

   pairings 
  between 
  Ntmeophila 
  plantaginis 
  $ 
  and 
  Euthemonia 
  russula 
  2 
  , 
  

   Arctia 
  caia 
  $ 
  and 
  A. 
  jiaria 
  2 
  , 
  Phrcq/matobia 
  fuliginosa 
  $ 
  and 
  P. 
  

   Itictuosa 
  2 
  , 
  all 
  of 
  which 
  produced 
  a 
  normal 
  number 
  of 
  eggs, 
  but 
  no 
  larva?. 
  

   Schreiner 
  records 
  (Stett. 
  Ent. 
  Zeit., 
  xiv., 
  p. 
  140) 
  repeated 
  pairings 
  

   between 
  Spilosoma 
  urticae 
  $ 
  and 
  S. 
  menthastri 
  2 
  , 
  and 
  Bacot 
  obtained 
  

   the 
  same 
  but 
  the 
  eggs 
  failed 
  to 
  hatch 
  although 
  they 
  became 
  darker 
  

   in 
  colour. 
  Caradja 
  made 
  the 
  first 
  approach 
  to 
  success, 
  obtaining 
  

   crossings 
  between 
  Spilosoma 
  mendica 
  var. 
  rustica 
  J 
  and 
  S. 
  luc- 
  

   tuosa 
  2 
  , 
  S. 
  luctuosa 
  $ 
  and 
  S. 
  var. 
  rustica 
  2 
  , 
  6'. 
  luctuosa 
  J 
  and 
  S. 
  

   )uendica 
  2 
  . 
  In 
  1893, 
  eight 
  2 
  luctuosa 
  paired 
  with 
  $ 
  var. 
  rustica, 
  laid 
  

   some 
  1800 
  eggs, 
  of 
  which 
  99 
  produced 
  larva?, 
  some 
  two-thirds 
  of 
  the 
  

   remaining 
  eggs 
  undergoing 
  some 
  development, 
  the 
  rest 
  being 
  quite 
  

   infertile, 
  two 
  of 
  the 
  larva? 
  lived 
  to 
  spin 
  their 
  cocoons, 
  but 
  no 
  imagines 
  

   resulted. 
  In 
  1894, 
  six 
  more 
  crossings 
  of 
  S. 
  rustica 
  J 
  x 
  luctuosa 
  2 
  were 
  

   obtained, 
  five 
  of 
  the 
  batches 
  of 
  eggs 
  laid 
  gave 
  no 
  larva?, 
  but 
  the 
  other 
  

   batch 
  gave 
  141 
  larva? 
  (from 
  the 
  earliest 
  laid 
  eggs), 
  and 
  194 
  other 
  eggs 
  

   were 
  infertile. 
  The 
  reciprocal 
  cross, 
  in 
  its 
  two 
  forms, 
  S. 
  luctuosa 
  $ 
  x 
  

   rustica 
  $ 
  and 
  S. 
  luctuosa 
  $ 
  x 
  mendica 
  2 
  , 
  gave 
  only 
  infertile 
  eggs. 
  

   The 
  hybrid 
  larva? 
  again 
  fed 
  up 
  vigorously, 
  but 
  none 
  reached 
  the 
  

   imaginal 
  stage 
  (Soc. 
  Ent., 
  viii., 
  pp. 
  89-90; 
  ix.,p. 
  49). 
  Later, 
  Caradja 
  

   was 
  more 
  successful, 
  and 
  described 
  and 
  figured 
  (Iris, 
  x., 
  pp. 
  371-373, 
  

   pi. 
  ix., 
  figs. 
  1-11) 
  hybrids 
  between 
  Spilosoma 
  mendica 
  and 
  S. 
  sordida, 
  

   two 
  species 
  which 
  he 
  had 
  succeeded 
  in 
  crossing, 
  and 
  the 
  progeny 
  of 
  

   which 
  he 
  had 
  reared 
  to 
  the 
  imaginal 
  stage. 
  He 
  used 
  two 
  forms 
  of 
  

   S. 
  mendica 
  for 
  the 
  purpose, 
  one, 
  the 
  form 
  rustica, 
  the 
  other 
  the 
  form 
  

   standfussi 
  (a 
  cross 
  between 
  rustica 
  xmendica). 
  In 
  each 
  case, 
  mendica 
  

   (in 
  one 
  of 
  these 
  forms) 
  was 
  the 
  £ 
  and 
  sordida 
  the 
  $ 
  parent. 
  Next 
  

   year 
  he 
  was 
  even 
  more 
  fortunate 
  obtaining 
  imagines 
  from 
  a 
  crossing 
  

  

  