CONTENTS 



PAGE 

 PREFACE .~ . . vii 



CHAPTER I 



INSECTS AND OTHER ANIMALS. . . . , , . ,1 



The larger groups of animals Their distinctive characters The Arthropoda 

 Its characters Animals included Subdivisions of the group Their 

 distinctive characters Tabular statement of the distinctive characters. 



CHAPTER II 



THE INSECT: ITS EXTERNAL STRUCTURE . . 



The characters of insects Number of segments in the embryo In the 

 adult The hypodermis Sutures Plates Form of head Structures on 

 the body The antennae Eyes Mouthparts Chewing mouthparts 

 The thorax Its appendages Legs Wings The abdomen Abdominal 

 feet Ovipositors-Other appendages . 



CHAPTER III 



THE INSECT: ITS INTERNAL STRUCTURE 15 



Digestive organs Breathing organs Circulatory organs The blood 

 Excretory organs Nervous system Sense organs Reproductive organs. 



CHAPTER IV 



THE DEVELOPMENT OF INSECTS 25 



Egg-laying and viviparous insects Description of insect eggs Hatching 

 Development of the insect The Ametabolous development Hemime- 

 tabolous development Holometabolous development Pupation and 

 cocoon making Transformation of the pupa Emergence Common 

 names of Holometabolous larvse. 



CHAPTER V 



LOSSES CAUSED BY INSECTS: NATURE'S CONTROL METHODS 32 



Amount of the loss not generally realized Its average amount To crops 

 To animals and their products To forests and their products To stored 

 materials By disease Total loss Losses increasing Causes Intro- 

 duction of foreign insect pests Reduction in abundance of insectivorous 

 birds A theoretic state of equilibrium upset by civilization Nature's 

 methods too slow Artificial methods necessary. 



CHAPTER VI 



ARTIFICIAL METHODS OF CONTROL 38 



Two groups of methods Farm practice Healthy crops Crop rotation- 

 Plowing Time of planting Resistant varieties of plants Trap crops- 

 Special methods Hand picking Repellents Trap lanterns Burning 

 Heat Miscellaneous methods. 



