﻿ADDENDUM 
  : 
  HYBRIDISATION 
  IN 
  LEPIDOPTERA. 
  587 
  

  

  Eumorphids, 
  into 
  the 
  inner 
  margin 
  ; 
  (2) 
  the 
  absence 
  of 
  the 
  red 
  

   abdominal 
  mediodorsal 
  stripe 
  ; 
  and 
  (3) 
  the 
  presence 
  of 
  a 
  dark 
  hind- 
  

   margmal 
  band 
  on 
  hindwings. 
  Expanse 
  50mm. 
  -62mm. 
  ; 
  smaller 
  than 
  

   average 
  elpenor, 
  distinctly 
  smaller 
  than 
  euphorbias. 
  Head 
  pale 
  olive- 
  

   green, 
  bordered 
  with 
  reddish 
  on 
  each 
  side; 
  antennae 
  of 
  same 
  length 
  as 
  

   those 
  of 
  elpenor 
  and 
  euphorbiae, 
  but 
  intermediate 
  in 
  bulk 
  ; 
  above 
  

   greyish-white, 
  reddish 
  at 
  base, 
  brown 
  below 
  on 
  the 
  pectinated 
  side. 
  

   Thorax 
  pale 
  olive-green. 
  Patagia 
  bordered 
  interiorly 
  with 
  reddish, 
  less 
  

   intense 
  than 
  in 
  elpenor, 
  but 
  white-bordered 
  exteriorly 
  more 
  conspicuously 
  

   than 
  in 
  elpenor, 
  though 
  less 
  so 
  than 
  in 
  euphorbiae. 
  The 
  red 
  thoracic 
  

   stripes 
  peculiar 
  to 
  elpenor 
  scarcely 
  recognisable. 
  Abdomen 
  slender, 
  of 
  

   the 
  same 
  colour 
  as 
  the 
  thorax 
  above 
  ; 
  the 
  anal 
  segment 
  (red 
  in 
  elpenor) 
  

   olive-green 
  ; 
  the 
  red 
  mediodorsal 
  line 
  quite 
  absent 
  ; 
  the 
  sides 
  pale 
  

   red 
  ; 
  the 
  upper 
  olive-green 
  portion 
  narrower 
  than 
  in 
  elpenor, 
  thus 
  

   making 
  the 
  red 
  sides 
  more 
  conspicuous 
  ; 
  on 
  each 
  side 
  of 
  the 
  1st 
  

   segment 
  a 
  black 
  spot, 
  as 
  in 
  elpenor, 
  but 
  much 
  larger 
  and 
  more 
  intense; 
  

   anal 
  tuft 
  strong, 
  of 
  the 
  same 
  colour 
  as 
  abdomen. 
  The 
  forewings 
  

   intermediate 
  between 
  the 
  more 
  slender 
  ones 
  of 
  elpenor 
  and 
  the 
  broader 
  

   ones 
  of 
  euphorbiae 
  ; 
  the 
  ground 
  colour 
  of 
  a 
  more 
  or 
  less 
  pale 
  carmine- 
  

   red 
  ; 
  the 
  costa 
  bordered 
  for 
  three-fourths 
  of 
  its 
  length 
  with 
  pale 
  olive- 
  

   green 
  ; 
  at 
  the 
  base 
  for 
  about 
  one-fourth, 
  and 
  again 
  beyond 
  the 
  middle 
  

   up 
  to 
  the 
  apex, 
  this 
  border 
  is 
  enlarged 
  into 
  costal 
  spots 
  ; 
  the 
  basal 
  spot 
  

   more 
  elongated 
  than 
  in 
  euphorbiae, 
  and 
  not 
  so 
  sharply 
  circumscribed 
  ; 
  

   the 
  second 
  spot 
  may 
  be 
  looked 
  on 
  as 
  a 
  combination 
  of 
  the 
  second 
  and 
  

   third 
  spots 
  in 
  euphorbiae 
  ; 
  in 
  the 
  apical 
  portion 
  of 
  this 
  spot 
  (in 
  the 
  

   place 
  where, 
  in 
  euphorbiae, 
  the 
  third 
  costal 
  spot 
  arises) 
  is 
  a 
  small 
  dark 
  

   spot, 
  from 
  which, 
  to 
  the 
  middle 
  of 
  the 
  inner 
  margin, 
  runs 
  a 
  pale 
  olive- 
  

   green 
  stripe, 
  slightly 
  bent 
  inwardly 
  about 
  the 
  middle, 
  and 
  of 
  an 
  even 
  

   width 
  of 
  about 
  2mm. 
  From 
  the 
  apex 
  of 
  the 
  wing 
  runs 
  the 
  character- 
  

   istic 
  Phryxid 
  band, 
  widening 
  as 
  it 
  reaches 
  the 
  inner 
  margin; 
  in 
  colour 
  

   pale 
  olive-green, 
  its 
  inner 
  margin 
  parallel 
  with 
  the 
  first-mentioned 
  

   stripe, 
  about 
  3mm. 
  distant, 
  regular 
  in 
  outline, 
  whilst 
  the 
  outer 
  margin 
  

   is 
  irregular, 
  but 
  conspicuous 
  owing 
  to 
  its 
  dark 
  colour, 
  and 
  joins 
  the 
  

   inner 
  margin 
  near 
  the 
  anal 
  angle 
  ; 
  the 
  band 
  is 
  narrower 
  than 
  in 
  

   euphorbiae, 
  and 
  approaches 
  the 
  form 
  of 
  that 
  of 
  hippophaes. 
  The 
  

   space 
  between 
  the 
  band 
  and 
  the 
  wing-margin 
  is 
  slightly 
  darker 
  than 
  

   the 
  red 
  ground 
  colour 
  ; 
  it 
  is 
  broader 
  than 
  in 
  elpenor, 
  but 
  not 
  quite 
  so 
  

   wide 
  as 
  in 
  euphorbiae. 
  A 
  black 
  dash 
  bordered 
  with 
  white 
  hairs 
  lies 
  at 
  

   the 
  base 
  on 
  the 
  inner 
  margin, 
  intermediate 
  in 
  size 
  between 
  those 
  of 
  

   the 
  parents. 
  The 
  red 
  line 
  on 
  the 
  extreme 
  costa, 
  present 
  in 
  elpenor, 
  is 
  

   here 
  wanting. 
  The 
  outer 
  marginal 
  fringes 
  short, 
  of 
  the 
  colour 
  of 
  the 
  

   outer 
  margin. 
  The 
  hindwings 
  of 
  the 
  hybrid 
  are 
  intermediate 
  between 
  

   those 
  of 
  the 
  parents, 
  both 
  in 
  shape 
  and 
  coloration, 
  as 
  also 
  is 
  the 
  

   black 
  basal 
  portion 
  ; 
  along 
  the 
  outer 
  margin, 
  about 
  lmm. 
  -2mm. 
  

   distant, 
  runs 
  a 
  blackish 
  band, 
  terminating 
  before 
  reaching 
  the 
  anal 
  

   angle 
  ; 
  this 
  band, 
  totally 
  absent 
  in 
  elpenor, 
  is 
  a 
  trait 
  from 
  euphorbiae, 
  

   although 
  neither 
  so 
  broad 
  nor 
  so 
  bright 
  as 
  in 
  that 
  species 
  ; 
  the 
  colour 
  

   of 
  the 
  space 
  between 
  the 
  basal 
  spot 
  and 
  marginal 
  band, 
  ami 
  between 
  

   these 
  and 
  the 
  margin, 
  is 
  red, 
  like 
  the 
  ground 
  colour 
  of 
  the 
  forewings 
  : 
  at 
  

   the 
  anal 
  angle 
  where, 
  in 
  euphorbiae, 
  is 
  a 
  conspicuous 
  white 
  spot, 
  which 
  

   is 
  absent 
  in 
  elpenor, 
  the 
  colour 
  is 
  faint 
  light 
  reddish. 
  Fringes 
  white. 
  

   . 
  . 
  • 
  . 
  PI. 
  ix,, 
  fig. 
  4, 
  represents 
  an 
  asymmetrically 
  marked 
  aberra- 
  

   tion 
  Among 
  the 
  other 
  examples 
  bred 
  is 
  one 
  in 
  which 
  all 
  the 
  

  

  