﻿165 
  

  

  which 
  visited 
  first 
  the 
  plantations 
  of 
  Romana 
  and 
  other 
  townships 
  

   of 
  the 
  Selva 
  and 
  then 
  proceeded 
  to 
  Darnius 
  y 
  Agullana 
  on 
  the 
  frontier. 
  

   In 
  this 
  article 
  an 
  address 
  given 
  by 
  one 
  member 
  of 
  the 
  commission, 
  

   Don 
  Jaime 
  Nonell 
  y 
  Comas, 
  is 
  freely 
  quoted, 
  while 
  the 
  Monograph 
  

   contains 
  a 
  full 
  record. 
  L. 
  dispar 
  lays 
  about 
  500 
  eggs 
  in 
  sheltered 
  

   places 
  on 
  the 
  branches 
  and 
  covers 
  them 
  with 
  hairs 
  from 
  its 
  abdomen. 
  

   The 
  eggs 
  remain 
  throughout 
  the 
  wdnter, 
  and 
  hatch 
  in 
  April 
  and 
  May. 
  

   For 
  7 
  to 
  10 
  days 
  the 
  young 
  caterpillars 
  remain 
  motionless, 
  grouped 
  

   together 
  in 
  large 
  numbers 
  ; 
  they 
  then 
  become 
  active 
  and 
  extra- 
  

   ordinarily 
  voracious 
  until 
  the 
  beginning 
  of 
  July, 
  when 
  they 
  spin 
  an 
  

   imperfect 
  cocoon 
  in 
  the 
  rugosities 
  of 
  the 
  bark. 
  The 
  adults 
  emerge 
  

   about 
  three 
  weeks 
  later 
  and 
  shortly 
  afterwards 
  the 
  females 
  lay 
  their 
  

   eggs. 
  The 
  enormous 
  voracity 
  of 
  the 
  larvae 
  is 
  responsible 
  for 
  the 
  

   rapid 
  defoliation 
  of 
  the 
  trees 
  attacked, 
  those 
  preferred 
  being 
  'he 
  

   evergreen-oak, 
  oak, 
  cork-tree, 
  plane-tree, 
  and 
  fig-tree. 
  Coroebus 
  

   undatus, 
  a 
  beetle 
  of 
  the 
  family 
  Buprestidae, 
  appears 
  between 
  the 
  

   middle 
  of 
  June 
  and 
  the 
  middle 
  of 
  July. 
  A 
  few 
  days 
  afterwards 
  the 
  

   female 
  lays 
  her 
  eggs 
  in 
  cracks 
  in 
  the 
  bark 
  of 
  the 
  lower 
  trunk 
  and 
  

   roots. 
  The 
  larvae 
  bore 
  inwards 
  and 
  establish 
  themselves 
  beneath 
  

   the 
  last-formed 
  corky 
  layer. 
  After 
  personal 
  observation 
  Senor 
  

   Nonell 
  y 
  Comas 
  does 
  not 
  agree 
  with 
  those 
  agricultural 
  entomologists 
  

   who 
  hold 
  that 
  the 
  hfe-cycle 
  of 
  C. 
  undatus 
  lasts 
  a 
  year 
  ; 
  according 
  to 
  

   him 
  it 
  lasts 
  two 
  years. 
  In 
  the 
  second 
  fortnight 
  of 
  August 
  the 
  larva 
  

   penetrates 
  the 
  liber 
  and 
  provokes 
  an 
  extravasation 
  of 
  sap 
  through 
  its 
  

   gallery. 
  This 
  causes 
  a 
  black 
  spot 
  on 
  the 
  exterior 
  of 
  the 
  trunk. 
  The 
  

   discoloration 
  may 
  only 
  be 
  temporary, 
  but 
  if 
  the 
  flow 
  is 
  abundant 
  the 
  

   sap 
  spreads 
  between 
  the 
  mother 
  bark 
  and 
  that 
  last 
  formed 
  and 
  causes 
  

   the 
  latter 
  to 
  lose 
  its 
  good 
  qualities. 
  These 
  spots 
  were 
  found 
  to 
  be 
  a 
  

   sure 
  indication 
  of 
  the 
  presence 
  of 
  the 
  insect. 
  It 
  is 
  hoped 
  that 
  the 
  

   knowledge 
  acquired 
  may 
  prove 
  of 
  use 
  in 
  reducing 
  the 
  ravages 
  of 
  these 
  

   pests 
  by 
  leading 
  to 
  an 
  encouragement 
  of 
  their 
  natural 
  enemies. 
  Bird 
  

   protection 
  is 
  an 
  important 
  point. 
  

  

  Feytaud 
  (J.). 
  La 
  Cochenille 
  de 
  San 
  Jos6. 
  [The 
  San 
  Jose 
  Scale. 
  ]^ 
  

   Bull. 
  Soc. 
  Etude 
  Vulg. 
  Zool. 
  Agric, 
  Bordeaux, 
  xii, 
  no. 
  6, 
  Dec. 
  1913, 
  

   pp. 
  174-178, 
  2 
  figs. 
  

  

  Although 
  the 
  San 
  Jose 
  scale 
  has 
  not 
  yet 
  been 
  found 
  on 
  trees 
  in 
  

   France, 
  the 
  author 
  thinks 
  it 
  well 
  to 
  be 
  on 
  guard 
  against 
  this 
  highly 
  

   polyphagous 
  pest. 
  Fortunately 
  Asjpidiotus 
  perniciosus 
  has 
  many 
  

   natural 
  enemies, 
  such 
  as 
  the 
  Coccinelhds, 
  Microweisea 
  misella 
  and 
  

   Chilocorus 
  similis 
  ; 
  the 
  parasitic 
  Hymenoptera, 
  Aphelinus 
  fuscipennis, 
  

   A. 
  mytilaspidis, 
  Aspidiotiphagus 
  citrinus, 
  Anaphes 
  gracilis, 
  Prospalta 
  

   aurantii, 
  Ablerus 
  clisiocampae, 
  etc., 
  and 
  the 
  fungus 
  Sphoerostilbe 
  

   coccophila. 
  Efficacious 
  control 
  methods 
  are 
  known, 
  but 
  they 
  are 
  

   difficult 
  to 
  apply 
  to 
  all 
  the 
  trees 
  attacked. 
  In 
  the 
  case 
  of 
  badly- 
  

   infested 
  and 
  injured 
  trees 
  uprooting 
  and 
  burning 
  is 
  the 
  only 
  radical 
  

   measure. 
  The 
  Hme-sulphur 
  formula 
  given 
  contains 
  5 
  parts 
  by 
  weight 
  

   of 
  quicklime, 
  3 
  of 
  sulphur, 
  and 
  100 
  of 
  water. 
  Hydrocyanic 
  acid 
  is 
  

   mentioned 
  as 
  being 
  very 
  efficacious, 
  but 
  requiring 
  costly 
  apparatus 
  

   and 
  difficult 
  to 
  apply. 
  Some 
  Coccids 
  native 
  to 
  France 
  might 
  be 
  

   taken 
  for 
  A. 
  perniciosus. 
  According 
  to 
  Dr. 
  P. 
  Marchal 
  they 
  are 
  : 
  

   (1) 
  Aspidiotus 
  ostreaeformis, 
  very 
  common 
  in 
  France 
  and 
  abundant 
  

  

  