CONTENTS 
CHAP. PAGE 
I. The Structure and Special Physiology of Insects .. i 
II. Development and Metamorphosis of Insects... 35 
III. Classification of Insects. 52 
IV. The Simplest Insects (Order Aptera)..... 58 
V. May-flies (Order Ephemerida) and Stone-flies (Order Plecoptera). 65 
VI. Dragon-flies and Damsel-flies (Order Odonata). 75 
VII. The Termites or White Ants (Order Isoptera). 99 
VIII. Book-lice and Bark-lice (Order Corrodentia), and Biting Bird-lice 
(Order Mallophaga) . 111 
IX. The Cockroaches, Crickets, Locusts, Grasshoppers, and Katydids 
(Order Orthoptera). 123 
X. The True Bugs, Cicadas, Aphids, Scale-insects, etc. (Order Hemip- 
tera), and the Thrips (Order Thysanoptera).. 163 
XI. The Nerve-winged Insects (Order Neuroptera), Scorpion-flies 
(Order Mecoptera), and Caddis-flies (Order Trichoptera). 223 
XII. The Beetles (Order Coleoptera). 246 
XIII. The Two-winged Flies (Order Diptera). 301 
XIV. The Moths and Butterflies (Order Lepidoptera). 358 
XV. The Ichneumons, Gall-flies, Wasps, Bees, and Ants (Order Hymen- 
optera). 459 
XVI. Insects and Flowers. 562 
XVII. Color and Pattern and their Uses... 583 
XVIII. Insects and Disease. 615 
Appendix: Collecting and Rearing Insects. 635 
Index. 649 
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