﻿FREDERICINA 
  CALODACTYLA. 
  167 
  

  

  as 
  well 
  as 
  darker, 
  looking 
  insect. 
  Stainton 
  nctes 
  it 
  (Ent. 
  Ann., 
  ii., 
  p. 
  

   44) 
  as 
  much 
  darker 
  in 
  colour, 
  the 
  lobes 
  of 
  the 
  anterior 
  wings 
  especially 
  

   darker 
  ; 
  the 
  tip 
  of 
  the 
  anterior 
  lobe 
  rather 
  less 
  produced 
  ; 
  the 
  pale 
  

   streak 
  keeping 
  nearer 
  to 
  the 
  hind 
  margin 
  on 
  the 
  second 
  lobe. 
  Leech 
  

   observes 
  it 
  as 
  being 
  more 
  slender 
  in 
  appearance, 
  having 
  the 
  broken 
  

   dash 
  of 
  dark 
  brown 
  colour 
  along 
  the 
  inner 
  margin 
  of 
  the 
  forewing 
  

   and 
  the 
  broad 
  pale 
  posterior 
  edging 
  of 
  the 
  costal 
  triangle. 
  Hofmann 
  

   observes 
  (Die 
  deutsch. 
  Pteroph., 
  p. 
  48) 
  that 
  F. 
  calodactyla 
  always 
  differs, 
  

   even 
  in 
  the 
  darkest 
  examples, 
  from 
  P. 
  yonodactyla 
  by 
  its 
  rich 
  admixture 
  

   of 
  yellow 
  and 
  its 
  brighter 
  coloration 
  ; 
  the 
  markings 
  are 
  the 
  same, 
  the 
  

   only 
  noticeable 
  difference 
  being 
  that 
  the 
  yellow 
  colour 
  (beyond 
  the 
  

   brown 
  costal 
  triangle) 
  extends 
  in 
  a 
  diffused 
  manner 
  further 
  into 
  the 
  

   upper 
  lobe, 
  but 
  even 
  this 
  character 
  is 
  not 
  quite 
  constant 
  ; 
  the 
  brown 
  

   space 
  in 
  front 
  of 
  the 
  white 
  transverse 
  line 
  on 
  the 
  upper 
  lobe, 
  as 
  

   regards 
  its 
  extent 
  and 
  its 
  paler 
  or 
  darker 
  tint, 
  is 
  just 
  as 
  variable 
  as 
  in 
  

   P. 
  yonodactyla. 
  

  

  Egglayixg. 
  — 
  The 
  eggs 
  are 
  laid 
  beneath 
  leaves 
  of 
  golden-rod, 
  the 
  

   upper 
  surface 
  tending 
  to 
  become 
  depressed 
  by 
  desiccation, 
  as 
  in 
  many 
  

   plume 
  (and 
  other 
  "flat") 
  eggs. 
  Those 
  under 
  observation 
  began 
  to 
  

   hatch 
  July 
  3rd, 
  1904 
  (Chapman). 
  

  

  Ovum.- 
  — 
  The 
  egg 
  is 
  pale 
  yellowish-green 
  in 
  colour, 
  ovoid 
  in 
  form, 
  

   052mm. 
  long, 
  0*30mm. 
  wide, 
  and 
  026mm. 
  high 
  at 
  the 
  thicker, 
  and 
  

   0'18mm. 
  at 
  the 
  thinner, 
  end. 
  The 
  sculpturing 
  is 
  of 
  a 
  hexagonal 
  

   character, 
  or 
  at 
  least 
  polygonal, 
  but 
  is 
  faint 
  or 
  evanescent, 
  there 
  being 
  ap- 
  

   parently 
  the 
  depressions 
  of 
  the 
  cells, 
  although 
  the 
  divisionsbetween 
  them 
  

   are 
  not 
  well 
  defined 
  lines 
  (Chapman. 
  Described 
  June 
  26th, 
  1904. 
  The 
  

   eggs 
  probably 
  at 
  this 
  date 
  already 
  laid 
  a 
  few 
  days 
  ; 
  batched 
  July 
  3rd) 
  . 
  A 
  

   long 
  oval 
  in 
  outline, 
  slightly 
  inclining 
  to 
  brick-shape, 
  the 
  two 
  ends 
  of 
  

   different 
  form, 
  the 
  one 
  flattened 
  and 
  the 
  other 
  tending 
  to 
  be 
  pointed. 
  

   Of 
  the 
  usual 
  pale 
  yellow-green 
  colour, 
  and 
  semitransparent 
  in 
  appear- 
  

   ance. 
  Length 
  between 
  -5mm. 
  and 
  -6mm., 
  width 
  about 
  -3mm., 
  thickness 
  

   about 
  -250111m. 
  to 
  -275mm. 
  The 
  pointing 
  at 
  the 
  narrow 
  end 
  (?the 
  nadir) 
  

   is 
  very 
  much 
  more 
  apparent 
  on 
  edge 
  view, 
  the 
  outline 
  viewed 
  in 
  this 
  

   position 
  is 
  really 
  a 
  very 
  long 
  ovoid. 
  I 
  can 
  find 
  no 
  trace 
  of 
  structural 
  

   pattern, 
  the 
  surface 
  appearing 
  varnished 
  as 
  usual. 
  The 
  sides 
  of 
  some 
  

   of 
  the 
  eggs 
  are 
  somewhat 
  depressed 
  in 
  places, 
  but 
  the 
  eggs 
  setm 
  to 
  

   vary 
  a 
  good 
  deal 
  in 
  this 
  respect, 
  so 
  perha.ps 
  tho 
  depressions 
  are 
  only 
  

   a 
  sign 
  of 
  age 
  (Bacot, 
  July 
  2nd, 
  1904). 
  

  

  Habits 
  of 
  larva. 
  — 
  Young 
  larvse 
  left 
  the 
  eggs 
  on 
  July 
  3rd, 
  1904, 
  

   and 
  disappeared 
  rapidly, 
  apparently 
  somewhere 
  towards 
  the 
  lower 
  part 
  

   of 
  the 
  plant, 
  but 
  opportunity 
  was 
  wanting 
  to 
  carefully 
  examine 
  leaves, 
  

   etc., 
  for 
  burrows 
  (Chapman). 
  The 
  only 
  (we 
  believe) 
  full-grown 
  larva 
  

   ever 
  examined 
  in 
  Britain, 
  was 
  taken 
  by 
  accident 
  in 
  Raindean 
  Wood, 
  

   Folkestone, 
  on 
  May 
  23rd, 
  1904. 
  Searching 
  for 
  larvse 
  of 
  Leioptilus 
  

   tephradactyla 
  on 
  leaves 
  of 
  golden-rod, 
  we 
  found 
  a- 
  larva 
  lei 
  ding 
  low 
  

   down 
  in 
  the 
  main 
  stem 
  of 
  a 
  young 
  plant 
  of 
  Solid 
  ago 
  virgaurea, 
  the 
  

   burrow 
  reaching 
  into 
  the 
  root 
  so 
  that 
  the 
  outside 
  leaves 
  hardly 
  held 
  

   together 
  when 
  the 
  affected 
  part 
  of 
  the 
  stem 
  and 
  root 
  was 
  pulled 
  from 
  

   the 
  ground. 
  The 
  larva 
  was 
  sent 
  to 
  Dr. 
  Chapman, 
  with 
  others 
  of 
  

   Adhinia 
  bipunctidactyla, 
  in 
  stems 
  and 
  roots 
  of 
  Scabiosa, 
  who 
  at 
  onee 
  

   guessed 
  its 
  species. 
  "It 
  was 
  then, 
  on 
  May 
  25th, 
  in 
  the 
  centre 
  of 
  half- 
  

   a-dozen 
  root-leaves, 
  or 
  leaves 
  of 
  a 
  stem 
  not 
  yet 
  begun 
  to 
  shoot 
  up. 
  

   these 
  had 
  apparently 
  been 
  pulled 
  up 
  together, 
  but 
  had 
  broken 
  from 
  the 
  

  

  