﻿" 
  I 
  beg 
  to 
  recall 
  that 
  my 
  observations 
  on 
  Th. 
  w-album, 
  

   Enoch., 
  were 
  exactly 
  under 
  the 
  conditions 
  described 
  — 
  short, 
  

   rests 
  on 
  flowers 
  between 
  flights 
  in 
  hot 
  sun 
  — 
  and 
  there 
  were 
  no 
  

   movements. 
  The 
  Panama 
  species 
  always 
  showed 
  the 
  eccentric 
  

   movements 
  during 
  rests." 
  

  

  The 
  use 
  of 
  the 
  " 
  Palisades 
  " 
  of 
  Lygaeonematus 
  com- 
  

   PRESSicoRNis, 
  F.— 
  The 
  Rev. 
  F. 
  D. 
  Morice 
  called 
  attention 
  to 
  

   a 
  paper 
  by 
  Mr. 
  J. 
  J. 
  Ward, 
  F.E.S., 
  in 
  the 
  Christmas 
  number 
  

   of 
  the 
  Strand 
  Magazine, 
  which 
  appeared 
  to 
  explain 
  the 
  object 
  

   of 
  the 
  so-called 
  " 
  palisades 
  " 
  (erect 
  columns 
  of 
  piled-up 
  froth- 
  

   bubbles) 
  with 
  which 
  the 
  young 
  larva 
  of 
  the 
  Sawfly 
  Lygaeone- 
  

   matus 
  cofnpressicornis, 
  F. 
  (= 
  vallator, 
  v. 
  Vollenh.) 
  surrounds 
  

   itself 
  while 
  feeding 
  on 
  a 
  leaf 
  of 
  poplar. 
  {Cf. 
  Proc. 
  Ent. 
  Soc, 
  

   Oct. 
  1917, 
  and 
  " 
  Zoologist," 
  xx, 
  1862, 
  p. 
  7855— 
  the 
  latter 
  

   being 
  an 
  English 
  translation 
  of 
  Vollenhoven's 
  " 
  Mem. 
  d' 
  entom. 
  

   soc. 
  entom. 
  Pays-Bas," 
  1, 
  1858.) 
  

  

  Mr. 
  Ward 
  found 
  that 
  ants 
  placed 
  on 
  such 
  leaves 
  invariably 
  

   ran 
  about 
  till 
  they 
  collided 
  with 
  one 
  of 
  the 
  columns. 
  The 
  

   latter 
  instantly 
  collapsed, 
  sticking 
  to 
  the 
  ant's 
  head, 
  evidently 
  

   causing 
  it 
  not 
  only 
  alarm, 
  but 
  extraordinary 
  discomfort, 
  as 
  

   shown 
  by 
  the 
  strange 
  convulsions 
  into 
  which 
  the 
  insect 
  im- 
  

   mediately 
  fell, 
  and 
  from 
  which 
  it 
  did 
  not 
  recover 
  for 
  a 
  consider- 
  

   able 
  time. 
  Afterwards 
  the 
  mere 
  sight 
  of 
  even 
  a 
  fragment 
  of 
  

   such 
  a 
  column 
  made 
  it 
  recoil 
  in 
  utter 
  horror 
  : 
  so 
  that 
  it 
  would 
  

   seem 
  that 
  the 
  palisades, 
  in 
  spite 
  of 
  their 
  extreme 
  fragility, 
  are 
  

   really 
  an 
  efficient 
  obstacle, 
  preventing 
  certain 
  kinds 
  of 
  enemies 
  

   from 
  approaching 
  the 
  feeding 
  larva. 
  

  

  Papers. 
  

  

  The 
  following 
  papers 
  were 
  read 
  : 
  — 
  

  

  " 
  Notes 
  on 
  the 
  Ancestry 
  of 
  the 
  Diptera, 
  Hemiptera, 
  and 
  

   other 
  Insects 
  related 
  to 
  the 
  Hymenoptera," 
  by 
  G. 
  Chester 
  

   Crampton, 
  Ph.D., 
  commimicated 
  by 
  G. 
  T. 
  Bethune-Baker, 
  

   F.L.S., 
  F.E.S. 
  

  

  " 
  Note 
  on 
  Bonelli's 
  Tableau 
  synoptique," 
  by 
  H. 
  E. 
  

   Andrewes, 
  F.E.S. 
  

  

  "On 
  a 
  Migration 
  of 
  Yellow 
  Butterflies 
  {Catopsilia 
  statira) 
  

   in 
  Trinidad," 
  by 
  C. 
  B. 
  Williams, 
  M.A., 
  F.E.S. 
  

  

  