﻿GILLMERIA 
  OCHRODACTYLA. 
  225 
  

  

  other 
  British 
  lepidopterist, 
  after 
  describing 
  the 
  imagines 
  (Ent. 
  Mo. 
  

   Mag., 
  xviii., 
  p. 
  144) 
  writes 
  : 
  " 
  Besides 
  the 
  differences 
  already 
  noted 
  in 
  

   the 
  colour, 
  in 
  our 
  description 
  of 
  the 
  imagines, 
  the 
  palpi 
  in 
  dichro- 
  

   dactyla 
  are 
  decidedly 
  longer 
  than 
  in 
  bertrami. 
  The 
  hooked 
  apex, 
  

   which, 
  in 
  some 
  specimens 
  of 
  bertrami, 
  probably 
  $ 
  s, 
  is 
  well-marked, 
  

   will 
  be 
  found 
  on 
  close 
  examination 
  to 
  have 
  a 
  different 
  shape 
  in 
  the 
  two 
  

   insects. 
  In 
  dichrodactyla 
  the 
  hook 
  is 
  much 
  more 
  emarginate 
  on 
  the 
  

   lower 
  side, 
  so 
  that 
  it 
  comes 
  to 
  a 
  much 
  finer 
  point 
  than 
  in 
  bertrami." 
  

   Bankes 
  writes 
  (in 
  litt.) 
  : 
  G. 
  ochrodactyla 
  may 
  readily 
  be 
  separated 
  

   from 
  G. 
  pallidactyla 
  by 
  the 
  following 
  major 
  distinctions, 
  of 
  which 
  the 
  

   fourth 
  alone 
  would 
  be 
  sufficient, 
  even 
  in 
  the 
  case 
  of 
  the 
  most 
  wasted 
  

   specimens 
  : 
  

  

  1. 
  G. 
  ochrodactyla 
  has 
  the 
  apex 
  of 
  the 
  forewing 
  decidedly 
  more 
  produced 
  and 
  

   more 
  pointed 
  than 
  G. 
  pallidactyla, 
  the 
  termen 
  of 
  the 
  upper 
  lobe 
  being, 
  therefore, 
  

   more 
  emarginate, 
  and 
  the 
  apex 
  projecting 
  much 
  further 
  beyond 
  the 
  tip 
  of 
  the 
  lower 
  

   lobe 
  than 
  in 
  its 
  congener. 
  

  

  2. 
  In 
  G. 
  ochrodactyla 
  the 
  forewings 
  are, 
  in 
  general 
  colour, 
  entirely 
  ochreous, 
  

   though 
  the 
  different 
  shades 
  vary 
  from 
  very 
  pale 
  to 
  very 
  dark, 
  whilst 
  in 
  G. 
  palli- 
  

   dactyla 
  the 
  palest 
  parts 
  of 
  them 
  are 
  distinctly 
  whitish, 
  and 
  the 
  darker 
  parts 
  are 
  

   more 
  or 
  less 
  decidedly 
  brownish, 
  sometimes 
  mixed 
  with 
  fawn 
  colour. 
  

  

  3. 
  In 
  G. 
  ochrodactyla 
  the 
  dark 
  spot 
  on 
  the 
  forewing 
  just 
  before 
  the 
  fissure 
  is 
  

   black 
  ; 
  in 
  G. 
  pallidactyla, 
  however, 
  it 
  is 
  merely 
  brown, 
  and 
  is, 
  moreover, 
  occasion- 
  

   ally 
  obsolete. 
  

  

  4. 
  In 
  G. 
  ochrodactyla, 
  the 
  whitish 
  hindlegs 
  are 
  conspicuously 
  barred 
  exter- 
  

   nally, 
  or 
  ringed, 
  with 
  bright 
  brown 
  above 
  both 
  pairs 
  of 
  spurs 
  and 
  the 
  first 
  tarsal 
  

   joint, 
  whereas 
  in 
  G. 
  pallidactyla 
  the 
  posterior 
  half 
  of 
  the 
  hind 
  tibia 
  is 
  altogether 
  

   brown 
  or 
  brownish 
  externally, 
  and 
  the 
  first 
  tarsal 
  joint, 
  which 
  may 
  be 
  wholly 
  

   whitish, 
  sometimes 
  tinged 
  posteriorly 
  with 
  brownish, 
  or 
  wholly 
  brownish, 
  is 
  never 
  

   distinctly 
  ringed. 
  

  

  A 
  comparison 
  of 
  30 
  bred 
  and 
  caught 
  imllidactyla, 
  with 
  some 
  90 
  bred 
  

   ochrodactyla, 
  shows 
  that 
  the 
  wing 
  expanse 
  of 
  the 
  latter 
  averages 
  decidedly 
  

   larger 
  than 
  that 
  of 
  the 
  former. 
  He 
  further 
  adds: 
  " 
  Stainton's 
  remark 
  

   (Ent. 
  Mo. 
  May., 
  ii., 
  138 
  [1865]) 
  that, 
  in 
  bertrami 
  (pallidactyla), 
  the 
  

   tarsi 
  are 
  ' 
  spotless 
  whitish,' 
  is 
  quite 
  unreliable, 
  for 
  the 
  long 
  1st 
  joint 
  is 
  

   sometimes 
  partly 
  or 
  wholly 
  brown. 
  Meyrick 
  (Handbook 
  Brit. 
  Lep., 
  435) 
  

   gives 
  the 
  scale-tooth 
  of 
  the 
  hindwings 
  as 
  somewhat 
  larger 
  in 
  ochrodac- 
  

   tyla 
  than 
  in 
  bertrami, 
  but 
  this 
  varies 
  greatly 
  in 
  size 
  in 
  both 
  species, 
  

   and 
  in 
  both 
  it 
  is 
  sometimes 
  obsolete. 
  Sang, 
  in 
  his 
  useful 
  notes 
  (Ent. 
  

   Mo. 
  Mag., 
  xviii., 
  143-4 
  [1881]), 
  states 
  that 
  captured 
  ochrodactyla 
  

   (dichrodactyla) 
  are 
  generally 
  almost 
  white, 
  whereas 
  he 
  never 
  took 
  a 
  faded 
  

   bertrami 
  (pallidactyla); 
  some, 
  however, 
  of 
  the 
  few 
  bertrami 
  that 
  I 
  have 
  

   netted, 
  are 
  certainly 
  ' 
  almost 
  white,' 
  though 
  it 
  is 
  quite 
  likely 
  that 
  the 
  

   former 
  becomes 
  bleached 
  more 
  rapidly 
  than 
  the 
  latter. 
  Sang 
  (loc. 
  cit.) 
  

   also 
  says 
  that 
  the 
  darker 
  shades 
  are, 
  in 
  bertrami, 
  indistinctly 
  margined, 
  

   and 
  mere 
  washes 
  of 
  colour, 
  not 
  sharply 
  laid 
  on 
  as 
  in 
  ochrodactyla. 
  

   This 
  is 
  true, 
  as 
  a 
  rule, 
  of 
  the 
  males 
  of 
  pallidactyla, 
  but, 
  in 
  some 
  of 
  the 
  

   females, 
  the 
  patches 
  of 
  darker 
  colour 
  are 
  quite 
  as 
  sharply 
  laid 
  on, 
  and 
  

   clearly 
  margined, 
  as 
  in 
  any 
  ochrodactyla, 
  and, 
  in 
  my 
  darkest 
  form 
  of 
  the 
  

   2 
  [which 
  would 
  appear 
  to 
  be 
  our 
  ah. 
  intermedia 
  (posted 
  p. 
  238)] 
  , 
  the 
  

   deeper 
  shade, 
  which 
  is 
  warm 
  russet-brown, 
  contrasts 
  so 
  clearly 
  and 
  

   strongly 
  with 
  the 
  underlying 
  whitish 
  ground 
  colour, 
  as 
  to 
  give 
  the 
  

   moth 
  a 
  remarkably 
  mottled 
  appearance." 
  South 
  states 
  (luit., 
  xviii.. 
  

   p. 
  281) 
  that 
  the 
  alleged 
  points 
  of 
  distinction, 
  on 
  which 
  reliance 
  is 
  placed 
  

   for 
  considering 
  bertrami 
  anddichrodactyl 
  a, 
  dist 
  inctspocies. 
  fail. 
  Restates. 
  

   and 
  criticises, 
  the 
  case 
  for 
  not 
  considering 
  them 
  to 
  be 
  a 
  single 
  speci< 
  

  

  