﻿438 
  BRITISH 
  LEPIDOPTERA. 
  

  

  on 
  the 
  lower 
  lobe, 
  whilst 
  the 
  white 
  costal 
  scales 
  to 
  a 
  great 
  extent 
  also 
  fail 
  

   = 
  ab. 
  paupera, 
  n. 
  ab. 
  There 
  is 
  also 
  some 
  variation 
  in 
  the 
  amount 
  of 
  

   white 
  and 
  black 
  scaling 
  on 
  the 
  lower 
  margin 
  of 
  the 
  3rd 
  plumule, 
  and 
  

   the 
  distinctness 
  of 
  the 
  white 
  at 
  the 
  apex 
  of 
  this 
  plumule. 
  The 
  speci- 
  

   mens 
  in 
  our 
  collection 
  of 
  ab. 
  sufusa 
  are 
  particularly 
  noticeable 
  as 
  being 
  

   without 
  the 
  usual 
  quantity 
  of 
  white 
  on 
  the 
  3rd 
  plumule. 
  We 
  do 
  

   not 
  observe 
  a 
  tendency 
  in 
  the 
  white 
  markings 
  in 
  our 
  least-marked 
  

   British 
  examples 
  to 
  become 
  ochreous 
  and 
  blend 
  with 
  the 
  ground 
  

   colour, 
  but 
  they 
  remain 
  white, 
  however 
  reduced 
  in 
  size 
  the 
  scale 
  

   patches 
  become. 
  Barrett's 
  description 
  (Lep. 
  Brit. 
  Ides, 
  ix., 
  p. 
  369) 
  

   appears 
  to 
  be 
  faulty, 
  in 
  that 
  it 
  makes 
  the 
  outer 
  lobal 
  transverse 
  

   line 
  branch 
  in 
  each 
  lobe 
  to 
  the 
  apex, 
  the 
  cilia 
  of 
  the 
  second 
  lobe 
  

   white, 
  etc. 
  (naked 
  eye 
  appearances, 
  not 
  borne 
  out 
  under 
  a 
  good 
  lens). 
  

   In 
  the 
  Frey 
  collection 
  there 
  are 
  the 
  same 
  two 
  distinct 
  shades 
  in 
  the 
  

   ground-colour 
  of 
  the 
  specimens 
  exhibited, 
  one 
  of 
  a 
  bright 
  brown 
  (the 
  

   type), 
  the 
  other 
  of 
  quite 
  a 
  dull 
  tint 
  of 
  brown. 
  There 
  is 
  great 
  difference 
  

   in 
  the 
  clearness 
  of 
  the 
  markings, 
  some 
  examples 
  having 
  the 
  lobal 
  trans- 
  

   verse 
  lines 
  snowy- 
  white, 
  but 
  the 
  others 
  dull 
  ochreous 
  and 
  inclined 
  to 
  

   blend 
  with 
  the 
  ground-colour. 
  Both 
  the 
  lobal 
  lines 
  usually 
  cross 
  both 
  

   the 
  upper 
  and 
  lower 
  lobes. 
  The 
  white 
  fissural 
  spot 
  is 
  sometimes 
  con- 
  

   spicuous, 
  at 
  others 
  almost 
  obsolete, 
  whilst 
  the 
  faint 
  transverse 
  shade 
  

   between 
  cleft 
  and 
  base 
  is 
  sometimes 
  increased 
  into 
  a 
  well- 
  developed 
  trans- 
  

   verse 
  line. 
  Two 
  examples 
  from 
  Frankfort 
  and 
  one 
  from 
  Munich 
  are 
  of 
  a 
  

   very 
  pale 
  browmish-ochreous 
  ground-colour, 
  with 
  feeble, 
  pale 
  (ochreous, 
  

   rather 
  than 
  white) 
  markings. 
  One 
  of 
  Zeller's 
  examples 
  in 
  the 
  " 
  Frey 
  

   coll.," 
  from 
  Glogau, 
  has 
  the 
  ground-colour 
  very 
  bright, 
  the 
  space 
  

   between 
  the 
  two 
  transverse 
  lines 
  on 
  the 
  upper 
  lobe 
  very 
  dark, 
  almost 
  

   banded. 
  Our 
  British 
  examples 
  frequently 
  show 
  this 
  dark 
  band, 
  and 
  

   have 
  the 
  colour 
  on 
  the 
  outside 
  pale, 
  but, 
  as 
  the 
  ground 
  colour 
  of 
  the 
  

   discal 
  and 
  basal 
  parts 
  of 
  the 
  wing 
  are 
  of 
  almost 
  the 
  same 
  dark 
  orange- 
  

   brown 
  tint 
  as 
  that 
  between 
  the 
  two 
  lobal 
  lines, 
  the 
  banded 
  appearance 
  

   does 
  not 
  become 
  conspicuous. 
  

  

  Comparison 
  of 
  Oxyptilus 
  pilosell,e 
  with 
  its 
  allies. 
  — 
  Generally 
  

   smaller 
  than 
  P. 
  hieracii, 
  to 
  which 
  it 
  is 
  most 
  closely 
  allied, 
  it 
  differs 
  in 
  

   the 
  less 
  dark 
  ground-colour, 
  less 
  sharply 
  white 
  transverse 
  lines, 
  and, 
  in 
  

   particular, 
  by 
  the 
  faint 
  appearance 
  of 
  the 
  whitish 
  line, 
  w 
  T 
  hich 
  edges 
  the 
  

   hind-margin 
  of 
  the 
  low 
  7 
  er 
  lobe 
  of 
  the 
  forewings. 
  Both 
  species 
  have 
  a 
  

   less 
  deep 
  cleft 
  than 
  P. 
  caffer. 
  P. 
  pilosellae 
  differs 
  from 
  P. 
  obscurus 
  

  

  (1) 
  by 
  its 
  larger 
  size. 
  (2) 
  by 
  its 
  brighter 
  (lighter) 
  colour, 
  (3) 
  by 
  the 
  

   less 
  sharply 
  marked 
  white 
  line 
  which 
  edges 
  the 
  costal 
  fringe 
  at 
  the 
  

   apex 
  of 
  the 
  upper 
  lobe, 
  (4) 
  by 
  the 
  triangular 
  scale-tuft 
  which 
  does 
  not 
  

   reach 
  the 
  apex 
  of 
  the 
  third 
  plumule. 
  This 
  last 
  character 
  P. 
  marginellus, 
  

   P. 
  ericetorum, 
  and 
  P. 
  trichodactylus 
  also 
  possess 
  (Zeller). 
  Webb 
  compares 
  

   the 
  Dover 
  examples 
  with 
  Capperia 
  heterodactyla, 
  and 
  notes 
  (in 
  litt.) 
  of 
  the 
  

   former: 
  "Some 
  of 
  the 
  reddish-browm 
  examples 
  are 
  quite 
  indistinguish- 
  

   able 
  from 
  the 
  old 
  Mickleham 
  specimens. 
  When 
  freshly-emerged 
  they 
  

   are 
  nearer 
  the 
  colour 
  of 
  heterodactyla 
  {teucrii), 
  but 
  the 
  colour, 
  tuft, 
  and 
  

   silveriness 
  of 
  the 
  markings 
  all 
  vary 
  in 
  individuals, 
  the 
  most 
  constant 
  

   characters 
  being 
  : 
  — 
  (1) 
  The 
  pale 
  ochreous 
  fringes 
  of 
  the 
  second 
  lobe. 
  

  

  (2) 
  The 
  absence 
  of 
  any 
  white 
  scale-patches 
  (best 
  seen 
  in 
  heterodactyla) 
  

   on 
  the 
  inner 
  margin 
  of 
  the 
  first 
  lobe. 
  (3) 
  The 
  absence 
  of 
  the 
  two 
  

   minute 
  black 
  tufts 
  on 
  the 
  inner 
  margin 
  opposite 
  the 
  fissure. 
  (4) 
  The 
  

   tuft 
  on 
  the 
  third 
  plumule 
  of 
  the 
  hindwing 
  not 
  extending 
  on 
  both 
  

  

  