CONTENTS 



Preface vii 



CHAPTER 1 



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 fi 



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 antenna; — Eyes — Mouthparts — Chewing mouthparts — 

 The thorax — Its appendages— Legs — Wings — The abdomen— Abdominal 

 feet — Ovipositor — 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 2.5 



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 pioducts — 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. 



