﻿xlv 
  

  

  known, 
  but 
  a 
  very 
  closely 
  allied 
  species 
  (or 
  form), 
  luridana, 
  

   Wkr. 
  {—heluliperda, 
  Dyar), 
  occasions 
  considerable 
  injury 
  to 
  

   Birch 
  trees 
  in 
  America, 
  where 
  it 
  has 
  also 
  been 
  bred 
  from 
  Alder. 
  

   It 
  will 
  doubtless 
  be 
  found 
  that 
  diana 
  is 
  also 
  attached 
  to 
  Birch 
  

   in 
  this 
  country. 
  This 
  is 
  a 
  most 
  interesting 
  addition 
  to 
  our 
  

   fauna, 
  as 
  it 
  is 
  obviously 
  not 
  an 
  introduced 
  species. 
  

  

  Eggs 
  of 
  Ennomos 
  autumnaria. 
  — 
  Mr. 
  E. 
  E. 
  Green 
  ex- 
  

   hibited 
  a 
  cluster 
  of 
  eggs 
  of 
  Ennomos 
  autumnaria, 
  and 
  drew 
  

   attention 
  to 
  their 
  superficial 
  resemblance 
  to 
  the 
  eggs 
  of 
  

   certain 
  Hemiptera. 
  Each 
  egg 
  is 
  of 
  a 
  long-oval 
  form, 
  sharply 
  

   truncate 
  at 
  the 
  upper 
  extremity, 
  where 
  there 
  is 
  a 
  raised 
  

   whitish 
  ring 
  contrasting 
  sharply 
  with 
  the 
  dark 
  brown 
  colour 
  

   of 
  the 
  remaining 
  area. 
  

  

  Mr. 
  Green 
  also 
  showed 
  an 
  enlarged 
  drawing 
  of 
  one 
  of 
  the 
  

   eggs. 
  

  

  DiANTHOECIA 
  LUTEAGO 
  AND 
  DiANTHOECIA 
  BARRETTIl. 
  — 
  

  

  Mr. 
  Edelsten 
  exhibited 
  specimens 
  of 
  D. 
  luteago, 
  and 
  D. 
  

   harrettii, 
  and 
  contributed 
  the 
  following 
  notes 
  : 
  — 
  

  

  There 
  has 
  been 
  a 
  considerable 
  discussion 
  in 
  the 
  past 
  as 
  to 
  

   whether 
  D. 
  harrettii 
  was 
  the 
  same 
  species 
  as 
  D. 
  luteago, 
  and 
  

   having 
  bred 
  D. 
  harrettii 
  in 
  considerable 
  numbers 
  in 
  1910, 
  

   I 
  determined 
  to 
  go 
  further 
  into 
  the 
  matter. 
  I 
  wrote 
  to 
  

   Staudinger 
  and 
  got 
  specimens 
  from 
  him 
  of 
  D. 
  luteago 
  and 
  its 
  

   form 
  D. 
  argillacea 
  from 
  various 
  locahties. 
  I 
  sent 
  them 
  all 
  

   to 
  Mr. 
  Pierce, 
  and 
  when 
  he 
  had 
  examined 
  their 
  genitalia 
  he 
  

   reported 
  that 
  one 
  of 
  the 
  D. 
  argillacea 
  which 
  came 
  from 
  Digne 
  

   in 
  the 
  Basses 
  Alpes 
  differed 
  from 
  the 
  others. 
  I 
  at 
  once 
  wrote 
  

   for 
  more 
  specimens 
  from 
  this 
  locality, 
  but 
  had 
  to 
  wait 
  until 
  

   the 
  next 
  season, 
  when 
  Staudinger 
  sent 
  me 
  several 
  more 
  

   specimens. 
  Mr. 
  Pierce 
  examined 
  all 
  these, 
  and 
  the 
  result 
  is 
  

   as 
  follows 
  : 
  — 
  

  

  The 
  genitalia 
  of 
  D. 
  luteago 
  and 
  its 
  form 
  argillacea 
  (from 
  all 
  

   locahties 
  except 
  Digne) 
  differ 
  from 
  the 
  genitalia 
  of 
  D. 
  harrettii. 
  

   The 
  genitalia 
  of 
  D. 
  harrettii 
  and 
  those 
  of 
  af^*Hacea 
  from 
  Digne 
  

   are 
  similar. 
  The 
  chief 
  difference 
  in 
  the 
  genitalia 
  is 
  in 
  the 
  spine 
  

   on 
  the 
  aedeagus. 
  In 
  luteago 
  it 
  is 
  an 
  elongate 
  spike 
  (angle 
  of 
  

   12°), 
  and 
  in 
  harrettii 
  a 
  short 
  broad 
  rose-thorn-shaped 
  spike 
  

   (angle 
  of 
  45°). 
  (See 
  Plate 
  B.) 
  Our 
  British 
  insect 
  can 
  now 
  be 
  

   raised 
  to 
  a 
  species 
  and 
  considered 
  distinct 
  from 
  luteago. 
  The 
  

  

  