﻿240 
  BRITISH 
  LEPIDOPTEKA. 
  

  

  markings 
  of 
  the 
  hind 
  fibulas, 
  but 
  also 
  by 
  the 
  colour 
  of 
  the 
  wings, 
  

   the 
  less 
  pointed 
  apex 
  of 
  the 
  forewings, 
  and 
  by 
  the 
  unicoloured 
  whitish 
  

   hindlegs. 
  The 
  first 
  specimens, 
  he 
  says, 
  he 
  received 
  from 
  Ohio, 
  worn 
  

   specimens 
  being 
  taken 
  near 
  Beverly 
  in 
  early 
  July. 
  

  

  8. 
  cervinidactylus, 
  Pack., 
  " 
  Ann. 
  Lye. 
  Nat. 
  Hist. 
  New 
  York," 
  x., 
  p. 
  266 
  (1873)/ 
  — 
  • 
  

   One 
  c? 
  . 
  Head 
  with 
  an 
  unusually 
  long 
  and 
  large 
  tuft 
  of 
  scales 
  projecting 
  slightly 
  

   beyond 
  the 
  second 
  joint 
  of 
  the 
  palpi. 
  Wings 
  shorter 
  than 
  usual, 
  and 
  broad 
  in 
  

   proportion 
  ; 
  the 
  split 
  in 
  the 
  primaries 
  quite 
  short, 
  the 
  costal 
  division 
  very 
  broad, 
  

   the 
  apex 
  triangular 
  ; 
  the 
  apex 
  of 
  hinder 
  division 
  triangular, 
  the 
  outer 
  edge 
  very 
  

   oblique, 
  the 
  hindermost 
  division 
  of 
  the 
  hindwings 
  shorter 
  and 
  narrower 
  than 
  usual. 
  

   Body 
  and 
  wings 
  fawn-colour, 
  vertex 
  of 
  head 
  whitish-fawn, 
  frontal 
  tuft 
  rather 
  

   darker, 
  antenna 
  annulated 
  with 
  whitish-fawn 
  and 
  brown, 
  palpi 
  brownish. 
  Fore- 
  

   wings 
  fawn-brown, 
  paler, 
  subochreous 
  along 
  the 
  inner 
  edge, 
  with 
  a 
  concolorous 
  

   patch 
  on 
  the 
  costa 
  a 
  little 
  within 
  the 
  apex 
  ; 
  a 
  black 
  dot 
  just 
  above 
  and 
  near 
  the 
  

   end 
  of 
  the 
  split 
  . 
  Fringe 
  concolorous 
  with 
  the 
  wing. 
  Hindwings 
  with 
  the 
  first 
  division 
  

   spoon-shaped 
  at 
  the 
  end, 
  the 
  third 
  feather 
  very 
  short 
  and 
  blunt 
  at 
  end 
  ; 
  the 
  entire 
  

   wings 
  fawn-colour, 
  with 
  no 
  dark 
  brown 
  scales 
  in 
  the 
  fringe 
  on 
  third 
  division. 
  Legs 
  

   whitish-brown 
  ; 
  hind 
  pair 
  as 
  far 
  as 
  middle 
  of 
  tibias, 
  beyond, 
  brown 
  ; 
  spurs 
  paler. 
  

   Beneath, 
  uniformly 
  brown, 
  thickly 
  dusted 
  with 
  paler 
  scales, 
  with 
  a 
  large 
  pale 
  

   cloud 
  on 
  the 
  costal 
  division 
  of 
  primaries. 
  Length 
  of 
  body, 
  '48 
  in. 
  ; 
  of 
  forewing, 
  

   '43 
  in. 
  California 
  (Edwards). 
  This 
  species 
  may 
  at 
  once 
  be 
  known 
  by 
  its 
  short 
  

   hindwings, 
  its 
  uniform 
  fawn-colour, 
  and 
  by 
  the 
  faded 
  ochreous 
  cloud 
  near 
  the 
  

   apex 
  of 
  costal 
  division 
  of 
  forewings. 
  It 
  is 
  remotely 
  allied 
  to 
  P. 
  pterodaetylus 
  of 
  

   Europe, 
  but 
  differs 
  decidedly 
  in 
  the 
  costal 
  division 
  of 
  the 
  forewings 
  being 
  much 
  

   more 
  acutely 
  produced. 
  Besides 
  these, 
  I 
  have 
  received, 
  through 
  Mr. 
  Edwards, 
  

   two 
  other 
  species 
  of 
  this 
  genus 
  from 
  California, 
  but 
  too 
  imperfectly 
  preserved 
  for 
  

   description 
  (Packard). 
  

  

  Egglaying. 
  — 
  The 
  moths 
  continued 
  to 
  pair 
  almost 
  every 
  night 
  for 
  

   about 
  a 
  fortnight, 
  but 
  it 
  was 
  not 
  until 
  July 
  2nd, 
  1904, 
  that 
  eggs 
  were 
  

   observed 
  ; 
  these 
  may 
  have 
  been 
  laid 
  a 
  day 
  or 
  two, 
  but 
  certainly 
  not 
  

   more, 
  as 
  a 
  careful 
  search 
  had 
  been 
  instituted 
  three 
  days 
  before. 
  As 
  

   suspected, 
  the 
  reason 
  for 
  delay 
  was 
  due 
  to 
  the 
  inability 
  to 
  get 
  yarrow 
  

   plants 
  with 
  the 
  flower-spike 
  in 
  the 
  right 
  stage 
  of 
  development. 
  The 
  ? 
  s 
  

   waited, 
  therefore, 
  until 
  the 
  flower- 
  stem 
  had 
  run 
  up, 
  and 
  the 
  flower- 
  

   head 
  had 
  opened 
  out 
  a 
  little. 
  The 
  ova 
  are 
  placed 
  either 
  on 
  the 
  flower- 
  

   head 
  itself, 
  or 
  else 
  on 
  the 
  small 
  leaflets 
  closely 
  adjoining 
  the 
  flower- 
  

   heads 
  ; 
  on 
  one 
  head 
  the 
  ova 
  have 
  been 
  very 
  thickly 
  laid, 
  mostly 
  on 
  the 
  

   top 
  ; 
  in 
  one 
  instance, 
  a 
  cluster 
  of 
  about 
  a 
  dozen 
  had 
  been 
  all 
  placed 
  quite 
  

   closely 
  together. 
  The 
  eggs 
  commenced 
  to 
  hatch 
  on 
  July 
  18th, 
  the 
  

   egg-stage 
  having 
  lasted 
  about 
  14 
  days 
  (Bacot). 
  

  

  Ovum. 
  — 
  The 
  eggs 
  are 
  of 
  a 
  pale 
  but 
  vivid 
  green 
  colour, 
  slightly 
  

   more 
  opaque 
  or 
  cloudy-looking 
  than 
  usual 
  in 
  those 
  of 
  allied 
  species, 
  

   and, 
  although 
  smooth 
  and 
  shiny 
  in 
  appearance, 
  they 
  are 
  without 
  the 
  

   highly 
  varnished 
  look 
  that 
  plume 
  eggs 
  so 
  often 
  have. 
  In 
  shape, 
  they 
  

   present 
  a 
  rather 
  rounded 
  oval 
  for 
  a 
  plume 
  egg, 
  with 
  low, 
  but 
  

   irregular, 
  longitudinal 
  ribs. 
  These 
  ribs 
  are 
  very 
  low 
  and 
  vein-like, 
  

   branching 
  from 
  one 
  another. 
  The 
  length 
  of 
  the 
  egg 
  -4mm. 
  ; 
  thickness 
  

   about 
  -2mm. 
  ; 
  width 
  about 
  -250mm. 
  [Unlike 
  the 
  ova 
  of 
  many 
  other 
  species, 
  

   they 
  are 
  so 
  firmly 
  cemented 
  that 
  it 
  is 
  difficult 
  to 
  detach 
  them 
  from 
  the 
  

   plant 
  without 
  injury, 
  and 
  then, 
  owing 
  to 
  the 
  plant-hairs 
  sticking 
  to 
  

   them, 
  they 
  are 
  very 
  awkward 
  to 
  get 
  into 
  position 
  for 
  examination 
  on 
  the 
  

   slide.] 
  (Bacot). 
  Eggs 
  laid 
  June 
  24th, 
  1881 
  (by 
  an 
  American 
  example 
  

   of 
  bischofji). 
  Elliptical 
  in 
  outline 
  and 
  somewhat 
  flattened; 
  the 
  longer 
  

   diameter 
  -43mm., 
  the 
  shorter 
  diameter 
  -3mm., 
  the 
  surface 
  irregularly 
  

   corrugated. 
  When 
  first 
  deposited 
  (?or 
  on 
  June 
  30th, 
  1881, 
  when 
  

   received) 
  of 
  a 
  light 
  cream-colour, 
  or 
  almost 
  hyaline, 
  with 
  a 
  glossy 
  

  

  

  