﻿AMBLYPTILIA 
  COSMODACTYLA. 
  279 
  

  

  developed, 
  short, 
  with 
  an 
  elongated 
  base, 
  coming 
  nearest 
  to 
  that 
  of 
  the 
  

   typical 
  form. 
  Schmid 
  says 
  that 
  the 
  imagines 
  of 
  var. 
  calaminthae 
  

   appear 
  from 
  September 
  up 
  to 
  late 
  autumn, 
  near 
  Ratisbon. 
  Larvse 
  were 
  

   found 
  on 
  the 
  Schlossberg, 
  in 
  Donaustauf, 
  on 
  Oalamintha 
  nepeta. 
  These 
  

   fixed 
  themselves 
  up 
  in 
  the 
  usual 
  manner, 
  and 
  changed 
  into 
  dark 
  pupae, 
  

   smaller 
  than 
  those 
  of 
  acanthodactyla, 
  on 
  the 
  stem 
  of 
  the 
  foodplant. 
  

  

  Comparison 
  of 
  the 
  imagines 
  of 
  Amblyptilia 
  cosmodactyla 
  and 
  

   A. 
  punctidactyla. 
  — 
  Bankes 
  says 
  that 
  the 
  following 
  appear 
  to 
  be 
  the 
  

   most 
  important, 
  striking, 
  and 
  reliable 
  distinctions 
  between 
  punctidactyla, 
  

   Haw., 
  and 
  cosmodactyla, 
  Hb. 
  : 
  — 
  

  

  (1) 
  In 
  punctidactyla, 
  the 
  apex 
  of 
  the 
  forewing 
  is 
  decidedly 
  more 
  produced, 
  

   slender, 
  and 
  falcate 
  than 
  in 
  cosmodactyla. 
  A 
  comparison 
  of 
  the 
  relative 
  distance 
  to 
  

   which 
  the 
  apex 
  of 
  the 
  upper 
  lobe 
  projects 
  beyond 
  that 
  of 
  the 
  lower 
  lobe, 
  shows 
  a 
  

   great 
  difference 
  between 
  the 
  two 
  species, 
  while 
  the 
  dissimilarity 
  in 
  the 
  breadth 
  and 
  

   shape 
  of 
  the 
  apex 
  is 
  equally 
  well-marked. 
  

  

  (2) 
  The 
  large 
  black 
  scale-tooth 
  in 
  the 
  middle 
  of 
  the 
  dorsal 
  cilia 
  of 
  the 
  hind- 
  

   wing 
  is, 
  in 
  ■punctidactyla, 
  noticeably 
  longer 
  from 
  the 
  centre 
  of 
  the 
  base 
  to 
  the 
  apex 
  

   than 
  in 
  cosmodactyla, 
  and 
  this 
  distinction 
  seems 
  perfectly 
  constant. 
  

  

  (3) 
  Punctidactyla 
  has 
  much 
  of 
  the 
  whitish 
  scaling 
  on 
  the 
  forewing 
  grouped 
  

   into 
  numerous 
  small 
  more 
  or 
  less 
  ill-defined 
  spots, 
  suggesting 
  interrupted 
  transverse 
  

   strias, 
  whereas, 
  in 
  cosmodactyla, 
  on 
  the 
  contrary, 
  the 
  whitish 
  scales 
  do 
  not 
  thus 
  

   thoroughly 
  break 
  up 
  the 
  ground 
  colour, 
  but 
  only 
  form 
  clouds 
  overlying 
  it 
  here 
  and 
  

   there, 
  or 
  else 
  are 
  scattered 
  singly 
  over 
  parts 
  of 
  it. 
  

  

  (4) 
  In 
  all 
  the 
  ordinary 
  forms 
  the 
  ground 
  colour 
  of 
  the 
  forewing 
  of 
  punctidac- 
  

   tyla 
  is 
  of 
  a 
  strongly 
  olivaceous 
  tint, 
  which 
  is 
  never 
  present 
  in 
  its 
  ally, 
  and 
  the 
  few 
  

   extreme 
  aberrations, 
  where 
  the 
  colour 
  causes 
  any 
  hesitation, 
  can 
  be 
  recognised 
  with 
  

   absolute 
  certainty 
  by 
  the 
  characteristics 
  mentioned 
  above 
  in 
  1 
  and 
  2. 
  

  

  Egglaying. 
  — 
  Some 
  eggs 
  were 
  laid 
  on 
  August 
  27th-28th, 
  1904, 
  on 
  

   Stachys 
  sylvatica 
  and 
  Krica 
  tetralix. 
  On 
  the 
  latter, 
  among 
  the 
  flowers 
  ; 
  

   on 
  the 
  former, 
  not 
  on 
  the 
  flowers 
  but 
  near 
  them 
  ; 
  they 
  began 
  to 
  hatch 
  

   on 
  September 
  1st 
  (Chapman). 
  A 
  $ 
  , 
  in 
  confinement, 
  deposited 
  eggs 
  

   on 
  the 
  calyx 
  of 
  Mimulus 
  cardinalis, 
  growing 
  in 
  a 
  greenhouse, 
  on 
  August 
  

   21st, 
  1898, 
  from 
  which 
  larvae 
  appeared 
  in 
  due 
  course 
  (Mclntyre) 
  ; 
  eggs 
  

   laid 
  June 
  17th, 
  1888, 
  at 
  Llangennech, 
  also 
  produced 
  larvae, 
  etc., 
  in 
  due 
  

   course 
  (Richardson). 
  

  

  Ovum. 
  — 
  When 
  first 
  laid, 
  of 
  a 
  pale 
  straw 
  colour, 
  getting 
  yellower, 
  

   till 
  almost 
  orange, 
  and 
  finally 
  leaden-coloured 
  when 
  about 
  to 
  hatch. 
  

   The 
  egg 
  is 
  rather 
  long, 
  narrow, 
  a 
  little 
  flattened 
  at 
  one 
  end, 
  towards 
  

   which 
  it 
  is 
  just 
  perceptibly 
  narrower 
  and 
  higher; 
  length 
  0*46mm.; 
  

   width 
  0-27mm. 
  at 
  wider 
  end, 
  023mm. 
  near 
  flat 
  end; 
  height 
  023mni. 
  

   near 
  flat 
  end, 
  falling 
  off 
  to 
  about 
  0'20mm. 
  at 
  the 
  other 
  end 
  ; 
  the 
  end 
  

   view 
  is 
  nearly 
  circular 
  ; 
  the 
  sculpturing 
  is 
  in 
  irregular 
  polygons 
  about 
  

   0-024mm. 
  across; 
  the 
  cells 
  are 
  flat-bottomed, 
  the 
  separating 
  ribs 
  

   broad 
  and 
  rounded 
  ; 
  the 
  shrinking, 
  due 
  to 
  drying, 
  produces 
  longi- 
  

   tudinal 
  furrows, 
  that 
  are 
  not, 
  strictly 
  speaking, 
  structural, 
  but 
  follow 
  

   in 
  some 
  degree 
  the 
  network 
  where 
  its 
  ribbing 
  is 
  arranged 
  longitudinally 
  

   (Chapman). 
  [ 
  Wehave 
  a 
  second 
  description 
  of 
  eggs 
  that 
  differed 
  somewhat 
  

   (in 
  tint) 
  from 
  the 
  above 
  : 
  ' 
  ; 
  Pale 
  green 
  in 
  colour 
  ; 
  considerably 
  Larger 
  

   than 
  the 
  eggs 
  of 
  Adkinia 
  bipunctidactyla^ 
  with 
  which 
  they 
  wore 
  com- 
  

   pared 
  ; 
  oval 
  in 
  outline, 
  plump, 
  yet 
  considerably 
  flattened 
  on 
  the 
  upper 
  

   face; 
  the 
  two 
  ends 
  appearing 
  to 
  be 
  almost 
  equally 
  rounded 
  ; 
  no 
  trace 
  

   of 
  any 
  surface 
  markings." 
  Examined 
  simply 
  with 
  a 
  hand-lens 
  ; 
  

   described 
  August 
  17th, 
  1001, 
  from 
  four 
  eggs, 
  laid 
  on 
  a 
  setting-board, 
  

   captured 
  the 
  same 
  day 
  at 
  Bobbie. 
  We 
  had 
  at 
  the 
  time, 
  and 
  still 
  have, 
  

   every 
  belief 
  that 
  the 
  eggs 
  were 
  those 
  of 
  the 
  species 
  to 
  which 
  they 
  are 
  

   referred; 
  it 
  is, 
  of 
  course, 
  possible 
  that 
  we 
  may 
  be 
  wrong. 
  The 
  appear- 
  

  

  