CONTENTS. 



PAGE 



INTRODUCTION 9 



PROTOZOANS 12 



The Amoeba 12 



The Slipper Animalcule 18 



CCELENTERATES , 22 



The Fresh-water Sponge 22 



The Hydra 26 



INSECTS 34 



Hexapod Insects 36 



The Butterfly 36 



The Dragon Fly 42 



The Grasshopper 48 



The Squash Bug 67 



The Two-year Cicada 69 



The Back-Swimmer 61 



The Bumblebee 63 ' 



The Mud Wasp 70 



The Paper Wasp 72 



The Honeybee 73 



The Black Blister Beetle 74 



The Bluebottle Fly 80 



The Bee Killer 84 



The Cabbage Butterfly 86 



The Life Process in Insects 93 



A Review Exercise 99 



A Lesson in Classification 101 



Arachnid Insects . . , 105 



The Spider 105 



