﻿502 
  

  

  a 
  few 
  days 
  before 
  sowing 
  and 
  the 
  watering 
  of 
  the 
  beds 
  with 
  the 
  same 
  

   water 
  mixed 
  with 
  soot. 
  Kidney 
  and 
  French 
  beans 
  are 
  attacked 
  by 
  

   Tetranychus 
  telarius, 
  L., 
  and 
  Aphis 
  radicans 
  ; 
  spraying 
  with 
  1 
  per 
  cent. 
  

   SDlution 
  of 
  saltpetre 
  in 
  water 
  at 
  a 
  moderate 
  temperature 
  is 
  recom- 
  

   mended 
  against 
  the 
  former, 
  whilst 
  a 
  1 
  per 
  cent, 
  solution 
  of 
  tobacco- 
  

   extract 
  is 
  useful 
  against 
  the 
  latter. 
  

  

  Various 
  salad 
  plants 
  are 
  attacked 
  by 
  insects, 
  amongst 
  which 
  the 
  

   author 
  mentions 
  Barathra 
  (Mamestra) 
  brassicae, 
  Euxoa 
  {Agrotis) 
  

   segetiim, 
  Agriotes 
  lineatus 
  and 
  Melolontha 
  melolontha. 
  

  

  PoRTCHiNSKY 
  (I. 
  A.). 
  BamHtwiuie 
  KneiuM, 
  BCTptnaeMbie 
  bij 
  aepnt 
  h 
  

   iviyKt 
  M 
  HtKOTopbm 
  /iiaHHbm 
  pfl 
  odHapyweHin 
  speAHbix-b 
  HactKO- 
  

   MblXTa 
  BTj 
  XJltOHblXTj 
  sanacaxij. 
  [The 
  principal 
  mites 
  found 
  in 
  

   grain 
  and 
  flour 
  and 
  some 
  information 
  for 
  the 
  discovery 
  of 
  inju- 
  

   rious 
  insects 
  in 
  grain 
  stores.] 
  — 
  « 
  Tpyflbl 
  Biopo 
  no 
  SHTOMOnorJM 
  

   YMeHaro 
  KoMHTeia 
  FnaB. 
  VnpaB. 
  3. 
  M 
  3.» 
  [Memoirs 
  of 
  the 
  Bureau 
  

   of 
  Entomology 
  of 
  the 
  Scientific 
  Committee 
  of 
  the 
  Central 
  Board 
  of 
  

   Land 
  Administration 
  and 
  Agriculture.'] 
  St. 
  Petersburg, 
  xi, 
  no. 
  2, 
  

   1914, 
  52 
  pp., 
  32 
  figs. 
  

  

  Pediculoides 
  ventricosus, 
  Newp., 
  has 
  been 
  known 
  for 
  many 
  years 
  in 
  

   France, 
  Italy, 
  Austria-Hungary 
  and 
  other 
  countries 
  as 
  occasionally 
  

   causing 
  dermatitis 
  in 
  man, 
  especially 
  to 
  those 
  engaged 
  in 
  carrying 
  bags 
  of 
  

   grain. 
  Both 
  sexes 
  are 
  described 
  ; 
  the 
  female 
  is 
  viviparous, 
  being 
  able 
  

   to 
  give 
  birth 
  during 
  a 
  single 
  day 
  to 
  about 
  50 
  individuals, 
  which 
  are 
  

   themselves 
  able 
  to 
  reproduce 
  descendants 
  in 
  about 
  six 
  days 
  after 
  birth, 
  

   at 
  a 
  temperature 
  of 
  88°-108° 
  F., 
  multiplication 
  ceasing 
  at 
  a 
  tem- 
  

   perature 
  lower 
  than 
  50° 
  F. 
  The 
  larvae 
  of 
  Sitotroga 
  cerealella, 
  and 
  of 
  

   various 
  species 
  of 
  Isosoma 
  are 
  attacked 
  by 
  P. 
  ventricosus. 
  In 
  the 
  case 
  of 
  

   the 
  former, 
  the 
  mites 
  in 
  the 
  form 
  of 
  young 
  migratory 
  females 
  get 
  into 
  

   the 
  grain 
  through 
  the 
  minute 
  opening 
  made 
  by 
  the 
  young 
  larvae 
  of 
  the 
  

   host 
  and 
  on 
  such 
  larvae 
  the 
  females 
  and 
  their 
  descendants 
  feed. 
  Chalcids 
  

   of 
  the 
  genus 
  Isosoma, 
  which 
  dwell 
  in 
  the 
  stalks, 
  are 
  also 
  attacked 
  by 
  the 
  

   nomadic 
  females 
  of 
  the 
  mites 
  either 
  after 
  the 
  harvest, 
  when 
  the 
  stalks 
  

   are 
  opened 
  in 
  the 
  internodes, 
  or 
  in 
  spring, 
  when 
  the 
  young 
  Isosoma 
  

   gnaw 
  openings 
  in 
  the 
  stalk, 
  through 
  which 
  the 
  mites 
  gain 
  access 
  to 
  

   them. 
  Together 
  with 
  the 
  stalks 
  and 
  straw 
  the 
  mites 
  get 
  into 
  mattresses 
  

   and 
  beds 
  and 
  attack 
  man, 
  causing 
  a 
  dermatitis 
  which 
  is 
  described, 
  

   with 
  figures. 
  These 
  mites 
  also 
  attack 
  Ditropinotus 
  aureoviridis, 
  

   Crawf 
  ., 
  a 
  parasite 
  of 
  Isoso^na. 
  

  

  Trombidium 
  {Microtrombidium) 
  pusiUum, 
  Herm., 
  known 
  under 
  

   the 
  popular 
  name 
  of 
  " 
  rouget 
  " 
  in 
  France, 
  and 
  " 
  harvest 
  mites 
  " 
  in 
  

   America 
  and 
  England, 
  was 
  usually, 
  until 
  lately, 
  mistaken 
  for 
  Pedicu- 
  

   loides 
  ventricosus. 
  The 
  larvae 
  which 
  attack 
  men 
  and 
  animals 
  were 
  

   previously 
  considered 
  to 
  be 
  a 
  distinct 
  species 
  and 
  were 
  called 
  Leptus 
  

   autumnalis. 
  The 
  author 
  describes 
  the 
  adult 
  mites 
  and 
  their 
  larvae, 
  

   figuring 
  both 
  stages, 
  and 
  points 
  out 
  that, 
  w^hile 
  the 
  adults 
  of 
  Trom- 
  

   bidium 
  are 
  exclusively 
  phytophagous, 
  their 
  larvae 
  attack 
  either 
  

   various 
  insects, 
  or, 
  as 
  is 
  the 
  case 
  with 
  T. 
  pusillum, 
  the 
  higher 
  animals. 
  

   They 
  occur 
  commonly 
  on 
  fowls, 
  frequently 
  causing 
  death, 
  and 
  in 
  

   Denmark 
  a 
  yearly 
  epidemic 
  disease 
  of 
  man 
  called 
  " 
  August 
  Knuder 
  " 
  

   is 
  due 
  to 
  them. 
  The 
  eggs 
  of 
  Trombidium 
  are 
  laid 
  in 
  the 
  earth 
  and 
  

  

  