﻿13 
  

  

  damaged. 
  The 
  excavations 
  conducted 
  later 
  proved 
  that 
  in 
  mixed 
  

   forests, 
  plantations 
  of 
  young 
  oak, 
  birch 
  and 
  aspen, 
  suffered 
  only 
  one- 
  

   third 
  of 
  the 
  injury 
  done 
  in 
  pure 
  oak 
  plantations, 
  when 
  no 
  collections 
  

   were 
  made 
  in 
  either. 
  As 
  preventive 
  measures 
  against 
  oviposition 
  

   by 
  the 
  insects, 
  hght 
  harrow^ing 
  of 
  the 
  soil 
  and 
  spraying 
  of 
  tobacco 
  dust 
  

   in 
  the 
  nurseries 
  w^ere 
  tried. 
  The 
  latter 
  gave 
  no 
  useful 
  result. 
  

  

  Apart 
  from 
  Melolontha, 
  operations 
  were 
  also 
  directed 
  against 
  Euproc- 
  

   tis 
  chrysorrhoea, 
  Lymantria 
  dispar 
  and 
  Lophyrus 
  pini, 
  the 
  larvae 
  of 
  

   which 
  were 
  collected 
  and 
  destroyed. 
  The 
  larvae 
  of 
  Notodonta 
  trepida 
  

   were 
  swept 
  by 
  brooms 
  from 
  the 
  trees 
  and 
  collected 
  afterwards 
  into 
  

   pits. 
  The 
  larvae 
  of 
  Retinia 
  were 
  destroyed 
  by 
  cutting 
  aw^ay 
  the 
  

   branches 
  from 
  the 
  point 
  at 
  which 
  they 
  had 
  started 
  to 
  penetrate, 
  and 
  

   burning 
  them. 
  

  

  Notice 
  of 
  Public 
  Hearing 
  on 
  the 
  Alligator 
  Pear 
  Weevil 
  (Coleop). 
  — 
  

  

  Entom. 
  News, 
  Philadelphia, 
  xvix, 
  no. 
  9, 
  Nov. 
  1913, 
  p. 
  416. 
  

  

  In 
  an 
  editorial 
  note 
  attention 
  is 
  drawn 
  to 
  a 
  meeting 
  that 
  w^as 
  to 
  

   be 
  held 
  at 
  the 
  Agricultural 
  Department, 
  Washington, 
  during 
  November, 
  

   to 
  discuss 
  the 
  question 
  of 
  establishing 
  a 
  quarantine 
  against 
  avocado 
  

   seeds 
  and 
  fruits 
  imported 
  into 
  the 
  continental 
  United 
  States. 
  It 
  

   appears 
  that 
  a 
  dangerous 
  enemy 
  to 
  avocados 
  (alligator 
  pears) 
  known 
  

   as 
  the 
  avocado 
  weevil 
  (Heilipiis 
  lauri) 
  exists 
  in 
  Hawaii, 
  Porto 
  Rico, 
  

   Mexico, 
  and 
  other 
  foreign 
  countries. 
  The 
  weevil 
  lives 
  in 
  the 
  seed 
  of 
  the 
  

   avocado, 
  and 
  no 
  method 
  is 
  known 
  by 
  which 
  it 
  may 
  be 
  killed 
  without 
  

   destroying 
  the 
  seed 
  itself. 
  In 
  view 
  of 
  the 
  increase 
  of 
  avocado 
  culture 
  

   in 
  the 
  United 
  States, 
  especially 
  in 
  California, 
  it 
  is 
  hoped 
  that 
  the 
  

   nvestigations 
  now 
  being 
  made 
  will 
  lead 
  to 
  the 
  discovery 
  of 
  a 
  method 
  of 
  

   treatment. 
  

  

  Schneider-Orelli 
  (0.). 
  Der 
  gegenwartige 
  Stand 
  der 
  Reblaus- 
  

   forschung. 
  [The 
  present 
  state 
  of 
  research 
  upon 
  Phylloxera.] 
  — 
  - 
  

   Schweiz. 
  Zeits. 
  filr 
  Ohst-und 
  Weinbau, 
  Frauenfeld, 
  xxii, 
  no. 
  21, 
  

   10th 
  Nov. 
  1913, 
  pp. 
  321-325. 
  

  

  This 
  paper 
  gives 
  shortly 
  the 
  work 
  of 
  Borner, 
  which 
  forms 
  a 
  con- 
  

   tinuation 
  of 
  the 
  researches 
  made 
  recently 
  in 
  Italy 
  and 
  France 
  upon 
  

   the 
  life-history 
  of 
  the 
  vine 
  louse 
  (Phylloxera 
  vastatrix.) 
  The 
  work 
  upon 
  

   the 
  subject 
  by 
  Marchal 
  and 
  Feytaud 
  is 
  given 
  fully 
  in 
  the 
  "Revue 
  de 
  

   Viticulture 
  " 
  (vol. 
  xi, 
  p. 
  5). 
  The 
  present 
  paper 
  shows 
  that 
  the 
  winged 
  

   louse 
  and 
  the 
  gall-louse, 
  in 
  the 
  majority 
  of 
  cases, 
  play 
  no 
  part 
  in 
  the 
  

   spread 
  of 
  the 
  pest 
  on 
  European 
  vines 
  ; 
  and 
  that 
  the 
  wingless 
  root- 
  

   louse 
  can 
  multiply 
  indefinitely, 
  giving 
  rise 
  to 
  numerous 
  generations 
  

   without 
  the 
  intervention 
  of 
  a 
  sexual 
  generation, 
  as 
  occurs 
  in 
  American 
  

   vines. 
  

  

  Marchal 
  (P.). 
  Contribution 
  a 
  T^tude 
  de 
  la 
  biologic 
  des 
  Chermes, 
  

   [Contribution 
  to 
  the 
  study 
  of 
  the 
  biology 
  of 
  Chermes.] 
  — 
  Ann. 
  

   Sci. 
  Nat. 
  Zool, 
  Paris, 
  xviii, 
  nos. 
  3-6, 
  1913, 
  pp. 
  153-385, 
  6 
  pi., 
  

   74 
  figs. 
  

  

  The 
  author 
  has 
  made 
  numerous 
  observations 
  and 
  experiments 
  to 
  

   ascertain 
  the 
  life-history 
  of 
  four 
  species 
  of 
  Chermes, 
  viz. 
  C. 
  nussliniy 
  

  

  %f 
  

  

  