﻿488 
  

  

  had 
  not 
  previously 
  been 
  regarded 
  as 
  an 
  economic 
  pest, 
  namely, 
  

   Porosagrotis 
  orthogonia. 
  Control 
  is 
  difficult, 
  as 
  this 
  species 
  appears 
  to 
  

   feed 
  just 
  below 
  the 
  surface. 
  Infested 
  fields 
  were 
  divided 
  into 
  plots, 
  

   which 
  were 
  treated 
  with 
  various 
  strengths 
  of 
  Paris 
  green, 
  salt 
  and 
  

   sugar, 
  mixed 
  with 
  bran, 
  lead 
  arsenate 
  and 
  London 
  purple 
  ; 
  the 
  best 
  

   results 
  were 
  obtained 
  by 
  the 
  Paris 
  green, 
  the 
  poisoned 
  bran 
  varying 
  in 
  

   its 
  efficiency. 
  Dipterous 
  parasites 
  have 
  been 
  reared 
  in 
  the 
  laboratory 
  

   from 
  cut- 
  worms 
  taken 
  in 
  the 
  field, 
  and 
  these 
  are 
  believed 
  to 
  be 
  a 
  

   natural 
  control. 
  Further 
  investigations 
  are 
  being 
  undertaken. 
  

  

  Bagnall 
  (R. 
  S.). 
  a 
  Chalcid 
  parasitic 
  on 
  Thrips. 
  — 
  Rept. 
  Brit. 
  Assn. 
  

   . 
  Adv, 
  Sci. 
  1913, 
  London, 
  1914, 
  p. 
  531. 
  

  

  The 
  author 
  has 
  observed 
  minute 
  black 
  and 
  white 
  Chalcids, 
  which 
  

   he 
  regarded 
  as 
  having 
  some 
  relation 
  with 
  Terebrantian 
  Thysanoptera. 
  

   In 
  August 
  1913, 
  many 
  specimens 
  of 
  this 
  Chalcid 
  were 
  found 
  in 
  the 
  

   flowers 
  of 
  toad-flax 
  at 
  Hele 
  Bay 
  near 
  Ilfracombe, 
  in 
  close 
  relation 
  with 
  

   larvae 
  of 
  Taeniothrips 
  primiilae, 
  and 
  Physothrips 
  atratus. 
  These 
  

   Chalcids 
  proved 
  to 
  be 
  Thripoctenus 
  russelli, 
  which 
  is 
  parasitic 
  on 
  

   Thrips 
  tabaci 
  and 
  FranklinieUa 
  tritici. 
  

  

  , 
  VuiLLET 
  (A.). 
  Note 
  sur 
  un 
  Chalcidien 
  Parasite 
  du 
  Thrips 
  des 
  Pois. 
  

   [Note 
  on 
  a 
  Chalcidid 
  Parasite 
  of 
  the 
  Pea 
  thrips.] 
  — 
  C.R. 
  Soc. 
  Biol., 
  

   Paris, 
  Ixxvi, 
  no. 
  13, 
  10th 
  Apr. 
  1914, 
  pp. 
  552-554, 
  1 
  fig. 
  

  

  From 
  the 
  biological 
  point 
  of 
  view, 
  the 
  Thysanoptera 
  have 
  received 
  

   only 
  a 
  small 
  degree 
  of 
  attention, 
  and 
  only 
  two 
  parasites 
  have 
  been 
  

   described 
  and 
  recorded 
  from 
  species 
  of 
  economic 
  importance, 
  viz., 
  

   Tetrastickus 
  gentilei, 
  from 
  the 
  olive 
  thrips, 
  Phloeothrips 
  oleae, 
  and 
  

   Thripoctenus 
  russelli, 
  from 
  the 
  bean 
  thrips, 
  Heliothrips 
  fasciatus. 
  The 
  

   author 
  in 
  the 
  present 
  paper 
  records 
  and 
  describes 
  a 
  new 
  species 
  of 
  

   Chalcidid, 
  Thripoctenus 
  brui, 
  parasitic 
  on 
  the 
  pea 
  thrips 
  (FranklinieUa 
  

   robusta). 
  The 
  specimens 
  from 
  which 
  the 
  description 
  has 
  been 
  made 
  

   were 
  taken 
  from 
  larvae 
  and 
  imagines 
  of 
  F. 
  robusta 
  on 
  the 
  flowers 
  of 
  

   peas, 
  sweat 
  pea 
  and 
  bean 
  at 
  Dercy 
  (Aisne) 
  in 
  July 
  1913. 
  

  

  BoGOLiuBov 
  (S.). 
  BpCA'b 
  OT"b 
  Tnfl 
  H 
  6opb6a 
  CT> 
  HBK). 
  [The 
  damage 
  

   done 
  by 
  Aphids 
  and 
  remedies 
  against 
  them.] 
  — 
  « 
  TypKBCTaHCKOe 
  

   Ce/lbCKOe 
  X03flMCTB0.» 
  [AgricuUure 
  of 
  Turkestan,'] 
  Tashkent, 
  wo. 
  5, 
  

   May 
  1914, 
  pp. 
  510-514. 
  

  

  The 
  author 
  refers 
  to 
  the 
  damage 
  done 
  in 
  Turkestan 
  to 
  various 
  

   plants 
  by 
  Aphis 
  gossypii, 
  Glov., 
  and 
  by 
  Aphis 
  brassicae, 
  and 
  gives 
  

   some 
  general 
  information 
  on 
  their 
  biology, 
  parasites, 
  etc. 
  He 
  reports 
  

   on 
  his 
  experiments 
  against 
  them 
  with 
  kerosene-lime 
  emulsions 
  which 
  

   gave 
  very 
  good 
  results. 
  The 
  experiments 
  were 
  conducted 
  in 
  a 
  market- 
  

   garden, 
  where 
  cucumbers 
  and 
  melons 
  have 
  seriously 
  suffered 
  from 
  these 
  

   pests. 
  He 
  recommends 
  the 
  following 
  recipe 
  for 
  the 
  insecticide 
  : 
  

   i 
  lb. 
  of 
  kerosene, 
  J 
  lb. 
  of 
  lime, 
  slaked 
  in 
  about 
  8 
  oz. 
  of 
  water, 
  the 
  

   whole 
  to 
  be 
  made 
  up 
  to 
  11 
  quarts 
  with 
  water 
  ; 
  when 
  carefully 
  handled 
  

   no 
  repeated 
  sprayings 
  will 
  be 
  necessary. 
  The 
  cost 
  of 
  about 
  540 
  

   gallons 
  of 
  this 
  insecticide, 
  which 
  will 
  suffice 
  for 
  200 
  to 
  250 
  plants 
  

   will 
  be 
  only 
  about 
  4^. 
  2d. 
  In 
  order 
  to 
  avoid 
  burning 
  the 
  plants, 
  

   the 
  spraying 
  must 
  be 
  done 
  before 
  8 
  a.m. 
  and 
  after 
  5 
  p.m., 
  before 
  dark. 
  

  

  