CONTENTS 



I. Introduction 3 



II. The Parts of an Insect's Body 7 



III. The Internal Structure of Insects .... 11 



IV. The Senses of Insects 16 



V. The Behavior of Insects . . . . . .18 



VI. How Insects Transform 19 



VII. How Insects are Classified 22 



VIII. How Insects Spread 40 



IX. Insects as Carriers of Disease ..... 42 



X. The Natural Enemies of Insects .... 45 



XI. Farm Practice in Relation to Insect Control . 56 



XII. Direct Control by Mechanical Means ... 59 



XIII. Insecticides — General Principles ... 63 



XIV. Poison Insecticides — For Biting Insects . . 65 

 XV. Contact Insecticides — For Sucking Insects . . 70 



XVI. Repellents 79 



XVII. FUMIGANTS 80 



XVIII. Fungicides Combined with Poisons .... 85 

 XIX. Spray Machinery — General Principles ... 89 

 XX. Types and Sizes of Spray Pumps. Dusting Appa- 

 ratus 92 



XXI. Accessories 100 



XXII. Insect Pests of Garden and Field Crops . . 107 



XXIII. Insect Pests of Orchard and Small Fruits . . 224 



XXIV. Insect Pests of the Household and Stored Prod- 



ucts 349 



XXV. Insect Pests of Domestic Animals .... 371 



xi 



