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  comparison 
  with 
  the 
  injury 
  produced 
  by 
  the 
  weevil 
  root-borer 
  (Dia- 
  

   prepes 
  abbreviatus, 
  L.) 
  No 
  effective 
  method 
  of 
  control 
  is 
  known, 
  but 
  

   the 
  numbers 
  of 
  the 
  grubs 
  can 
  be 
  considerably 
  reduced 
  by 
  hand- 
  

   picking 
  of 
  the 
  adults, 
  which 
  collect 
  in 
  large 
  numbers 
  on 
  com 
  and 
  

   sorghum. 
  The 
  insect 
  eats 
  most 
  of 
  the 
  small 
  roots 
  and 
  chews 
  the 
  

   centre 
  out 
  of 
  the 
  main 
  tap-root. 
  As 
  regards 
  Diatraea, 
  Trichogramma 
  

   minutum 
  is 
  its 
  only 
  parasite 
  in 
  Barbados. 
  Another 
  interesting 
  pest, 
  

   from 
  the 
  point 
  of 
  view 
  of 
  those 
  interested 
  in 
  parasitism, 
  is 
  Phytalus 
  

   smithi, 
  which 
  is 
  parasitised 
  by 
  a 
  black 
  Scoliid 
  wasp, 
  Tiphia 
  paralleh, 
  

   Smith. 
  P. 
  smithi 
  occurs 
  also 
  in 
  Mauritius 
  ; 
  it 
  was 
  probably 
  intro- 
  

   duced 
  there 
  in 
  cane 
  sent 
  from 
  Barbados. 
  Until 
  now 
  the 
  controlling 
  

   parasite, 
  T. 
  parallela, 
  was 
  not 
  present 
  in 
  Mauritius, 
  but 
  efforts 
  are 
  being 
  

   made 
  to 
  import 
  it. 
  

  

  Wilson 
  (H. 
  F.). 
  Notes 
  on 
  Podabrus 
  pruinosus. 
  — 
  Jl. 
  Econ. 
  Entom.y 
  

   Concord, 
  vi, 
  no. 
  6, 
  Dec. 
  1913, 
  pp. 
  443-457, 
  1 
  fig. 
  

  

  This 
  insect 
  is 
  one 
  of 
  the 
  most 
  important 
  agents 
  in 
  the 
  control 
  of 
  all 
  

   forms 
  of 
  plant-hce. 
  It 
  has 
  been 
  very 
  abundant 
  in 
  the 
  "Willamette 
  

   Valley, 
  Oregon, 
  during 
  the 
  past 
  two 
  years. 
  The 
  rosy 
  apple 
  aphis 
  

   {Aphis 
  sorbi, 
  Kalt. 
  ?), 
  the 
  black 
  cherry 
  aphis 
  (Myzus 
  cerasi, 
  ¥.), 
  and 
  

   the 
  vetch 
  aphis 
  {Macrosiphum 
  pisi, 
  Kalt. 
  ?) 
  are 
  held 
  in 
  check 
  by 
  this 
  

   insect. 
  The 
  adults 
  appear 
  early 
  in 
  May, 
  and 
  are 
  abundant 
  by 
  June. 
  

   By 
  July 
  only 
  a 
  few 
  individuals 
  are 
  found. 
  They 
  are 
  commonly 
  found 
  

   in 
  vetch 
  fields, 
  and 
  in 
  the 
  rolls 
  of 
  infested 
  apple 
  and 
  cherry 
  leaves. 
  

   They 
  undoubtedly 
  destroy 
  many 
  aphids 
  in 
  a 
  day, 
  and 
  are 
  of 
  great 
  

   economic 
  value. 
  

  

  The 
  eggs 
  were 
  not 
  observed 
  in 
  the 
  field, 
  but 
  in 
  the 
  insectary 
  they 
  

   were 
  deposited 
  on 
  the 
  ground 
  in 
  masses. 
  The 
  larvae 
  are 
  found 
  in 
  the 
  

   ground 
  from 
  3-6 
  inches 
  below 
  the 
  surface 
  ; 
  they 
  are 
  pink 
  in 
  colour 
  

   and 
  covered 
  with 
  fine 
  hairs. 
  The 
  pupae 
  are 
  found 
  in 
  earthen 
  cells 
  in 
  

   the 
  moist 
  earth 
  ; 
  at 
  first 
  they 
  are 
  white, 
  then 
  they 
  change 
  to 
  pink, 
  

   and 
  then 
  to 
  dark 
  blue. 
  The 
  adults 
  are 
  dark 
  blue 
  w^ith 
  light 
  brown 
  

   markings. 
  

  

  Hinds 
  (W. 
  E.). 
  Powdered 
  Arsenate 
  of 
  Lead 
  as 
  an 
  Insecticide. 
  — 
  JL 
  

  

  Econ. 
  Entom., 
  Concord, 
  vi, 
  no. 
  6, 
  Dec. 
  1913, 
  pp. 
  477-479. 
  

  

  The 
  use 
  of 
  powdered 
  arsenate 
  of 
  lead 
  is 
  said 
  to 
  have 
  given 
  very 
  

   satisfactory 
  results 
  as 
  an 
  insecticide 
  ; 
  the 
  statement 
  is 
  the 
  result 
  of 
  

   experience, 
  and 
  direct 
  experiment 
  made 
  in 
  the 
  Agricultural 
  Experi- 
  

   ment 
  Station 
  at 
  Auburn, 
  Alabama. 
  It 
  has 
  the 
  advantage 
  over 
  the 
  

   paste 
  preparation 
  in 
  that 
  it 
  weighs 
  much 
  less, 
  and, 
  therefore, 
  the 
  cost 
  

   of 
  transport 
  is 
  less 
  ; 
  it 
  is 
  not 
  liable 
  to 
  harden 
  and 
  cake, 
  as 
  the 
  paste 
  is 
  ; 
  

   and 
  it 
  is 
  not 
  so 
  difficult 
  to 
  work 
  up 
  into 
  a 
  uniform 
  suspension 
  in 
  water 
  

   for 
  spraying. 
  Over 
  Paris 
  green 
  it 
  possesses 
  the 
  great 
  advantage 
  of 
  

   not 
  causing 
  skin 
  injury 
  to 
  the 
  men 
  using 
  it. 
  The 
  Department 
  of 
  

   Entomology 
  of 
  the 
  Alabama 
  Experiment 
  Station 
  is 
  now 
  making 
  an 
  

   investigation 
  covering 
  the 
  use 
  of 
  various 
  forms 
  of 
  arsenate 
  of 
  lead, 
  

   with 
  a 
  view 
  to 
  finding 
  exactly 
  what 
  form 
  is 
  most 
  effective, 
  economical 
  

   and 
  generally 
  satisfactory 
  for 
  use 
  against 
  various 
  insect 
  pests. 
  For 
  

   the 
  present 
  there 
  is 
  no 
  reason 
  why 
  anyone 
  should 
  hesitate 
  to 
  use 
  

   powdered 
  arsenate 
  of 
  lead 
  in 
  preference 
  to 
  Paris 
  green 
  or 
  any 
  other 
  

   arsenical 
  poison. 
  

  

  