﻿63 
  

  

  MONGRELISATION 
  IN 
  LEPIDOPTERA. 
  

  

  (3) 
  ? 
  3 
  xred 
  ? 
  ? 
  3 
  x 
  black 
  ? 
  

  

  I 
  I 
  ! 
  I 
  

  

  l 
  I 
  

  

  black 
  3 
  x 
  black 
  ? 
  

  

  I 
  I 
  

  

  red 
  3 
  x 
  black 
  ? 
  ? 
  3 
  xred 
  2 
  

  

  I 
  ! 
  I 
  I 
  

  

  I 
  I 
  

  

  red 
  3 
  x 
  red 
  ? 
  

  

  1 
  L__ 
  

  

  I 
  I 
  I 
  

  

  1 
  f 
  (red) 
  2 
  ? 
  black) 
  ¥ 
  ( 
  intermediate 
  ) 
  

  

  (4) 
  Another 
  experiment 
  in 
  which 
  the 
  pedigree 
  could, 
  in 
  part, 
  be 
  

   traced 
  back 
  four 
  generations, 
  was 
  made 
  subsequently 
  — 
  

  

  ? 
  3 
  x 
  red 
  ? 
  ? 
  c? 
  x 
  red 
  ? 
  

  

  I 
  I 
  

  

  red 
  3 
  x 
  red 
  ? 
  

   ? 
  <? 
  xred 
  ? 
  | 
  | 
  

  

  ? 
  3 
  xred 
  ? 
  red 
  <r 
  x 
  red 
  ? 
  

  

  I 
  I 
  I 
  

  

  I 
  I 
  

  

  black 
  3 
  x 
  black 
  ? 
  

  

  I 
  I 
  

  

  I 
  

  

  g 
  J 
  (all 
  black). 
  

  

  (5) 
  One 
  brood 
  in 
  which 
  the 
  pedigree 
  can 
  be 
  traced 
  back, 
  in 
  one 
  

   direction 
  for 
  five 
  generations, 
  produced 
  twelve 
  specimens. 
  

  

  ? 
  3 
  xred 
  ? 
  ? 
  3 
  x 
  black 
  ? 
  

  

  black 
  3 
  x 
  black 
  ? 
  

   I 
  I 
  

  

  

  ? 
  c? 
  

   X 
  

  

  red 
  3 
  x 
  black 
  ? 
  

   xred 
  ? 
  

  

  ? 
  3 
  x 
  black 
  ? 
  

  

  1 
  1 
  

   red 
  3 
  x 
  red 
  ? 
  

  

  1 
  1 
  

  

  black 
  3 
  

   1 
  

  

  intermediate 
  ? 
  

   1 
  

  

  1 
  

   6 
  f 
  (b^ck) 
  

  

  

  1 
  1 
  

   ^ 
  3 
  (red) 
  \ 
  s 
  (intermediate) 
  

  

  Summarising, 
  Prout 
  notes 
  (op. 
  cit., 
  p. 
  30) 
  that, 
  in 
  unidentaria 
  x 
  

   ferrur/ata, 
  and 
  ferrugatax 
  unidentaria, 
  black-banded 
  (unidentaria) 
  forms 
  

   preponderate 
  as 
  4 
  : 
  3 
  .... 
  In 
  fwrugataxfirrugata, 
  red-banded 
  

   examples 
  strongly 
  predominate, 
  nearly 
  as 
  7 
  : 
  8. 
  [Reference 
  to 
  Trans. 
  

   City 
  Lond. 
  Knt. 
  Nee., 
  1897, 
  p. 
  18, 
  will 
  show 
  that 
  continued 
  red 
  

   selections 
  steadily 
  increase 
  the 
  percentage. 
  | 
  In 
  crossings 
  of 
  unidentaria 
  

   X 
  unidentaria, 
  the 
  red-banded 
  form 
  seems 
  almost 
  entirely 
  unable 
  to 
  

   assert 
  itself. 
  Prout 
  further 
  notes 
  that 
  he 
  was 
  much 
  impressed 
  by 
  the 
  

   general 
  very 
  direct 
  response 
  to 
  immediate 
  parentage 
  especially 
  if 
  black— 
  

   unidentaria 
  X 
  unidentaria 
  producing 
  black-banded 
  only, 
  irrespective 
  of 
  

   ancestry; 
  ferrugata 
  xferrugata 
  resulting 
  in 
  over 
  two- 
  thirds 
  red-banded 
  

  

  