Insects and Their Ways. The Relation of Insects to Humans. The Anatomy, Physiology, And Development of Insects. Behavior and Ecology. Classification, Nomenclature, And Identification. The Phylum Arthropoda. Hexapoda. The Entognathous Hexapods: Diplura, Protura, Collembola. The Apterygote Insects: Microcoryphia and Thysanura. Order Ephemeroptera: Mayflies. Order Odonata: Dragonflies and Damselflies. Order Grylloblattaria: Rockcrawlers. Order Phasmida: Walkingsticks. Order Orthoptera: Grasshoppers, Crickets, And Katydids. Order Mantodea: Mantids. Order Blattaria: Cockroaches. Order Isoptera: Termites. Order Dermaptera: Earwigs. Order Embiidina: Webspinners. Order Plecoptera: Stoneflies. Order Zoraptera: Zorapterans. Order Psocoptera: Psocids. Order Phthiraptera: Lice. Order Hemiptera: Bugs. Order Homopotera: Cicadas, Hoppers, Psyllids, Whiteflies, Aphids, And Scale Insects. Order Thysanoptera: Thrips. Order Neuroptera: Alderflies, Dobsonflies, Fishflies, Snakeflies, Lacewings, Antlions, And Owlflies. Order Coleoptera: Beetles. Order Strepsiptera: Twisted-Winged Parasites. Order Mecoptera: Scorpionflies. Order Siphonaptera: Fleas. Order Diptera: Flies. Order Trichoptera: Caddisflies. Order Lepidoptera: Butterlies and Moths. Order Hymenoptera: Sawflies, Parasitic Wasps, Wasps and Bees. Collecting, Preserving, And Studying Insects.