﻿CONTENTS 
  

  

  Introduction 
  

  

  Characteristics 
  

  

  Number 
  of 
  species.... 
  

  

  Injuries 
  ..• 
  

  

  Means 
  of 
  dispersal 
  

  

  Certain 
  species 
  of 
  value 
  

  

  Recognition 
  of 
  scale 
  insects 
  

  

  Key 
  based 
  on 
  superficial 
  characters 
  

   of 
  species 
  treated 
  

  

  Appletree 
  bark 
  louse, 
  Mytilaspis 
  

   pomorumi 
  

  

  Scurfy 
  bark 
  louse, 
  Chionaspis 
  

   furfura 
  ._ 
  

  

  Pernicious 
  or 
  San 
  Jose 
  scale 
  insect, 
  

   Aspidiotus 
  perniciosus.. 
  

  

  European 
  fruit 
  scale 
  insect, 
  Aspid- 
  

   iotus 
  ostreaeformis 
  

  

  Putnam's 
  scale 
  insect, 
  Aspidiotus 
  

   ancylus 
  

  

  Cherry 
  scale 
  insect, 
  Aspidiotus 
  

   lorbesi 
  

  

  White 
  scale 
  insect 
  of 
  the 
  ivy, 
  Aspid- 
  

   iotus 
  hederae 
  

  

  Remedial 
  measures 
  

  

  Only 
  contact 
  insecticides 
  of 
  value.. 
  

  

  lA 
  general 
  account 
  

  

  PAGE 
  

  

  291 
  

  

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   295 
  

   297 
  

  

  300 
  

  

  304 
  

   323 
  

   326 
  

  

  330 
  

  

  333 
  

  

  336 
  

   336 
  

  

  Remedial 
  measures 
  {contimied) 
  

  

  Whale 
  oil 
  soap 
  

  

  Whale 
  oil 
  soap 
  and 
  crude 
  petroleum 
  

   combination 
  

  

  Crude 
  petroleum 
  emulsion 
  

  

  Crude 
  petroleum 
  undiluted 
  

  

  Kerosene 
  

  

  Kerosene 
  emulsion 
  

  

  Other 
  summer 
  sprays 
  

  

  Fumigation 
  in 
  orchards 
  

  

  Fumigation 
  of 
  nursery 
  stock 
  

  

  Technical 
  study 
  of 
  four 
  species 
  of 
  

   Aspidiotus, 
  by 
  Miss 
  M. 
  F. 
  

   Boynton 
  

  

  Preface 
  

  

  Key 
  

  

  Aspidiotus 
  forbesi 
  

  

  Asprdiotus 
  perniciosus.. 
  

  

  Aspidiotus 
  ancylus 
  

  

  Aspidiotus 
  ostreaefor- 
  

   mis 
  

  

  Scale 
  insects, 
  Coccidae, 
  in 
  New 
  York 
  

  

  state 
  

  

  Explanation 
  of 
  plates 
  

  

  Index 
  

  

  136 
  

  

  337 
  

  

  337 
  

   338 
  

   339 
  

   339 
  

   339 
  

   339 
  

   341 
  

  

  343 
  

   343 
  

  

  347 
  

   347 
  

   349 
  

   351 
  

  

  352 
  

  

  354 
  

   361 
  

  

  367 
  

  

  and 
  bibliography 
  of 
  each 
  Is 
  given. 
  

  

  