﻿GILLMERIA 
  OCHRODACTYLA. 
  223 
  

  

  young 
  main 
  stems 
  of 
  Chrysanthemum 
  corumbosum 
  growing 
  in 
  firwoods, 
  

   near 
  Cassel, 
  I 
  found 
  larva? 
  of 
  a 
  plume, 
  which 
  produced 
  imagines 
  of 
  a 
  very 
  

   different 
  general 
  appearance 
  from 
  ochrodactyla, 
  and 
  will 
  probably 
  be 
  

   found 
  to 
  be 
  a 
  distinct 
  species. 
  The 
  ground 
  colour 
  is 
  a 
  wholly 
  pale 
  

   bone-yellow, 
  which 
  allows 
  the 
  middle 
  portion 
  of 
  the 
  costal 
  marking, 
  

   as 
  well 
  as 
  the 
  dots 
  on 
  the 
  inner 
  margin, 
  to 
  stand 
  out 
  strongly, 
  whilst 
  

   all 
  the 
  other 
  markings 
  have 
  nearly 
  disappeared. 
  The 
  chief 
  difference 
  

   is 
  in 
  the 
  pupa, 
  which 
  is 
  similarly 
  of 
  a 
  bone-yellow 
  colour, 
  covered 
  with 
  

   dark 
  brown 
  dots 
  and 
  longitudinal 
  streaks, 
  and 
  is 
  thus 
  very 
  different 
  

   from 
  the 
  normal 
  uniformly 
  green 
  pupa 
  of 
  ochrodactyla." 
  

  

  (3. 
  var. 
  bosniaca, 
  Eebel, 
  " 
  Ann. 
  k.k. 
  Nat. 
  Hofmus.," 
  xix., 
  pp. 
  323-4 
  (1904). 
  

   Ochrodactyla, 
  Bachm., 
  " 
  Soc. 
  Ent.," 
  xii., 
  p. 
  14 
  (1897) 
  ; 
  Rebel, 
  " 
  Ann. 
  k.k. 
  Nat. 
  

   Hofmus.," 
  p. 
  310 
  (1903). 
  — 
  Three 
  ? 
  s 
  in 
  good 
  condition, 
  obtained 
  in 
  the 
  neighbour- 
  

   hood 
  of 
  Prozor 
  by 
  Hilf, 
  on 
  July 
  20th, 
  1904. 
  So 
  different 
  are 
  these 
  from 
  typical 
  

   examples 
  of 
  ochrodactyla, 
  that, 
  in 
  spite 
  of 
  the 
  great 
  variability 
  of 
  this 
  species, 
  I 
  

   consider 
  it 
  as 
  a 
  marked 
  local 
  form, 
  distinguished 
  from 
  ochrodactyla 
  by 
  its 
  some- 
  

   what 
  larger 
  size, 
  its 
  much 
  sharper 
  and 
  somewhat 
  different 
  markings 
  of 
  the 
  pale 
  

   bone-coloured 
  forewings, 
  and 
  its 
  darker 
  (more 
  grey) 
  hindwings. 
  The 
  difference 
  in 
  

   the 
  markings 
  is 
  exhibited 
  in 
  that, 
  in 
  the 
  1st 
  lobe 
  of 
  the 
  forewing, 
  after 
  the 
  yellowish- 
  

   white 
  costal 
  mark 
  (continued 
  as 
  a 
  band 
  to 
  the 
  cleft), 
  a 
  very 
  dark 
  spot 
  crosses 
  the 
  

   whole 
  width 
  of 
  the 
  lobe, 
  and 
  is 
  edged 
  externally 
  by 
  the 
  sharp 
  yellowish-white 
  ante- 
  

   marginal 
  line 
  ; 
  in 
  no 
  specimens 
  of 
  ochrodactyla 
  before 
  me 
  has 
  this 
  spot 
  anything 
  

   like 
  the 
  strength 
  or 
  prominence 
  here 
  exhibited. 
  The 
  fringes 
  exhibit 
  for 
  one-third 
  

   their 
  length 
  (as 
  in 
  ochrodactyla), 
  a 
  black-brown 
  dividing 
  line, 
  after 
  which 
  the 
  

   whitish 
  colour 
  is 
  prevalent 
  ; 
  bat, 
  besides 
  this, 
  there 
  is, 
  at 
  the 
  base 
  of 
  the 
  fringe, 
  a 
  

   fine 
  dark 
  outer 
  marginal 
  line, 
  which 
  is 
  wanting 
  in 
  ochrodactyla. 
  Length 
  of 
  fore- 
  

   wing, 
  13mm. 
  -14mm. 
  (in 
  ochrodactyla, 
  12mm. 
  -13mm.). 
  The 
  absence 
  of 
  the 
  

   ochreous-yellow 
  tint, 
  and 
  the 
  strongly 
  marked 
  spot 
  in 
  the 
  1st 
  lobe 
  of 
  the 
  forewing, 
  

   are 
  the 
  most 
  essential 
  characters 
  of 
  this 
  form, 
  which, 
  in 
  the 
  pale 
  colour 
  of 
  the 
  

   forewing, 
  at 
  all 
  events, 
  comes 
  nearest 
  to 
  G. 
  pallidactyla 
  var. 
  borgmanni, 
  Ross., 
  but 
  

   is 
  essentially 
  distinguished 
  from 
  it 
  by 
  the 
  very 
  sharp 
  dark-spotted 
  hind 
  tibias. 
  This 
  

   last 
  character 
  also 
  excludes 
  a 
  close 
  relationship 
  with 
  G. 
  pallidactyla 
  (bertrami). 
  It 
  

   has 
  since 
  been 
  found 
  in 
  West 
  Bulgaria, 
  at 
  Sophia 
  (Buresch 
  ; 
  determined 
  by 
  

   Rebel, 
  1904) 
  (Rebel). 
  

  

  This 
  last-noted 
  example 
  is 
  that 
  observed 
  (Ann. 
  k.k. 
  Nat. 
  Hofmus., 
  

   1903, 
  p. 
  310) 
  as 
  captured 
  at 
  Kokaleny-Kloster, 
  July 
  4th, 
  1903. 
  Rebel 
  

   thinks 
  this 
  form 
  may 
  possibly 
  occur 
  in 
  South 
  Russia 
  and 
  Armenia. 
  

  

  Comparison 
  of 
  Gillmeria 
  ochrodactyla 
  and 
  G. 
  pallidactyla. 
  — 
  

   The 
  continued 
  discussion 
  as 
  to 
  whether 
  these 
  species 
  be 
  distinct 
  or 
  not 
  

   appears 
  to 
  be 
  purposeless, 
  since 
  there 
  are 
  excellent 
  distinguishing 
  

   characters 
  in 
  the 
  genitalia, 
  proving 
  them 
  to 
  be 
  abundantly 
  distinct. 
  

   Fernald 
  figures 
  (Pter. 
  North 
  America, 
  pi. 
  ix., 
  figs. 
  4-5 
  and 
  14-15), 
  and 
  

   notes 
  (op. 
  cit., 
  p. 
  36) 
  that, 
  so 
  different 
  are 
  the 
  genitalia, 
  that, 
  of 
  speci- 
  

   mens, 
  named 
  by 
  Zeller, 
  and 
  forwarded 
  to 
  him, 
  he 
  had 
  no 
  hesitation 
  in 
  

   referring 
  one 
  of 
  those 
  named 
  pallidactyla 
  (bertrami) 
  to 
  ochrodactyla, 
  and 
  

   another 
  of 
  them 
  named 
  ochrodactyla 
  to 
  pallidactyla. 
  Of 
  the 
  more 
  or 
  

   less 
  characteristic 
  differences 
  in 
  the 
  imagines, 
  Rossler, 
  in 
  1864, 
  notes 
  

   (Wien. 
  Ent. 
  Monats., 
  viii., 
  pp. 
  53-54) 
  that 
  pallidactyla 
  are 
  rather 
  

   smaller 
  and 
  more 
  uniformly 
  ferruginous 
  (while 
  ochrodactyla 
  are 
  ochre- 
  

   yellow), 
  without 
  the 
  sharp 
  dark 
  brown 
  spots 
  described 
  by 
  Muhlig, 
  and 
  

   differing 
  more 
  especially 
  from 
  ochrodactyla 
  in 
  that 
  all 
  the 
  rust-coloured 
  

   spaces 
  of 
  the 
  forewings 
  exhibit 
  bright 
  yellow 
  scales 
  at 
  regular 
  

   intervals 
  that 
  make 
  them 
  look 
  like 
  a 
  piece 
  of 
  wood 
  levelled 
  with 
  a 
  

   blunt 
  plane 
  (in 
  ochrodactyla 
  these 
  marks 
  only 
  occur 
  on 
  the 
  COSta) 
  ; 
  

   the 
  two 
  dark 
  spots 
  before 
  the 
  fissure 
  are 
  quite 
  absent 
  or 
  only 
  

   very 
  faintly 
  indicated. 
  On 
  the 
  other 
  hand, 
  the 
  whitish-yellow 
  

   spots 
  on 
  the 
  upper 
  wing 
  are 
  present 
  as 
  in 
  ochrodactyla. 
  " 
  The 
  

  

  