﻿194 
  

  

  Transactions. 
  — 
  Zoology. 
  

  

  The 
  egg's, 
  according 
  to 
  my 
  observations, 
  are 
  usually 
  from 
  thirty 
  to 
  fifty 
  in 
  

   number, 
  oval 
  in 
  shape, 
  of 
  a 
  white 
  or 
  opahne 
  colour, 
  changing 
  to 
  yellow 
  as 
  

   spring 
  comes 
  on. 
  

  

  The 
  males 
  of 
  this 
  species 
  have 
  yet 
  to 
  be 
  discovered. 
  

  

  I 
  have 
  often 
  found 
  amongst 
  the 
  eggs 
  of 
  Myiilasjns 
  fomornm 
  a 
  minute 
  

   white 
  Acarus. 
  It 
  is 
  to 
  be 
  hoped 
  that 
  it 
  feeds 
  largely 
  on 
  the 
  eggs. 
  

  

  Several 
  cures 
  for 
  this 
  pest 
  of 
  the 
  apple 
  tree 
  have, 
  I 
  believe, 
  been 
  tried. 
  

   Mr. 
  A. 
  Carrick, 
  of 
  Park 
  Terrace, 
  showed 
  me 
  last 
  year 
  a 
  tree 
  of 
  his 
  which 
  he 
  

   had 
  painted 
  over 
  with 
  a 
  mixture 
  of 
  kerosene 
  and 
  linseed 
  oil. 
  Inspection 
  

   of 
  the 
  puparia 
  showed 
  that 
  the 
  fluid 
  had 
  thoroughly 
  penetrated 
  them 
  and 
  

   surrounded 
  the 
  eggs 
  ; 
  and 
  I 
  understand 
  that 
  the 
  cure 
  has 
  been 
  complete. 
  

  

  Mytilasjns 
  j^iomorum 
  attacks 
  in 
  this 
  country 
  the 
  pear 
  and 
  plum 
  trees 
  as 
  

   well 
  as 
  the 
  apple. 
  Indeed, 
  I 
  have 
  found 
  specimens 
  identical 
  in 
  almost 
  every 
  

   respect 
  on 
  the 
  foUowing 
  trees 
  :• 
  — 
  plum, 
  peach, 
  apricot, 
  pear, 
  lilac, 
  cotone- 
  

   aster, 
  thorn, 
  sycamore, 
  ash, 
  and 
  many 
  others. 
  That 
  these 
  are 
  all 
  the 
  

   same 
  or 
  different 
  species, 
  I 
  do 
  not 
  like 
  to 
  affirm. 
  Yet 
  in 
  the 
  numbers 
  of 
  

   their 
  spinnerets 
  they 
  differ. 
  M. 
  Signoret 
  states 
  that 
  in 
  Europe 
  Mytilaspis 
  

   pomorum 
  is 
  found 
  only 
  accidentally 
  on 
  the 
  pear 
  tree, 
  sometimes 
  on 
  the 
  

   plum 
  ; 
  and 
  he 
  names 
  scarcely 
  any 
  other 
  trees. 
  Here 
  all 
  those 
  which 
  I 
  

   mentioned 
  appear 
  to 
  be 
  indiscrimately 
  attacked 
  by 
  them. 
  The 
  scale 
  on 
  the 
  

   ash 
  is 
  perhaps 
  a 
  little 
  smaller. 
  I 
  give, 
  however, 
  as 
  an 
  indication 
  for 
  com- 
  

   parison 
  the 
  spinnerets 
  of 
  insects 
  on 
  a 
  few 
  of 
  these 
  trees 
  : 
  — 
  

  

  — 
  

  

  Uppermost 
  Groups. 
  

  

  Upper 
  side 
  Groups. 
  

  

  Lower 
  side 
  Groups. 
  

  

  Apple 
  

  

  17 
  

  

  17 
  

  

  14 
  

  

  Plum 
  .. 
  .. 
  .. 
  

  

  20 
  

  

  17 
  

  

  17 
  

  

  Lilac 
  .. 
  .. 
  •• 
  

  

  17 
  

  

  19 
  

  

  16 
  

  

  Asli.. 
  .. 
  .. 
  •• 
  

  

  10 
  

  

  12 
  

  

  9 
  

  

  Cotoneaster 
  . 
  . 
  

  

  7 
  

  

  15 
  

  

  10 
  

  

  2. 
  Biytilasjns 
  pyriformis, 
  sp. 
  nov. 
  

  

  Plate 
  v., 
  fig. 
  8. 
  

  

  The 
  puparium 
  is 
  broadly 
  pearshaped, 
  the 
  discarded 
  tests 
  occupying 
  the 
  

   smaller 
  end 
  ; 
  the 
  tests 
  are 
  of 
  a 
  pretty 
  regular 
  oval 
  shape 
  ; 
  the 
  pelhcle 
  of 
  the 
  

   second 
  stage 
  reaches 
  to 
  about 
  the 
  middle 
  of 
  the 
  puparium. 
  Colour 
  of 
  

   shield 
  fight 
  brown 
  ; 
  texture 
  thinner 
  than 
  in 
  Mytilaspis 
  pomorum, 
  and 
  form 
  

   flatter 
  ; 
  length 
  about 
  xV 
  i^^h 
  ; 
  greatest 
  breadth 
  about 
  ^V 
  i^ch. 
  Plate 
  V., 
  

   fig. 
  3a, 
  shows 
  the 
  appearance 
  of 
  the 
  pu.parium. 
  

  

  This 
  species 
  in 
  the 
  shape 
  of 
  its 
  shield 
  and 
  a 
  few 
  other 
  particulars 
  

   resembles 
  Mytilaspis 
  buxi 
  of 
  Bouche.; 
  but 
  there 
  are 
  differences 
  which 
  

   authorise 
  me, 
  I 
  beheve, 
  in 
  considering 
  it 
  as 
  new. 
  

  

  