Discovering bugs -- Simple metamorphosis. Insect orders -- Ephemeroptera : mayflies -- Odonata : dragonflies and damselflies -- Dermaptera : earwigs -- Notoptera : icebugs -- Plecoptera : stoneflies -- Phasmatodea : stick insects and leaf insects -- Orthoptera : crickets, grasshoppers, and katydids -- Mantodea : mantises -- Blattodea : termites and cockroaches -- Phthiraptera : lice -- Thysanoptera : thrips -- Hemiptera : true bugs: cicadas, bedbugs, peanut bugs, treehoppers, thorn bugs, scale insects, jewel bugs, stink bugs, water bugs, water striders, lace bugs, spittlebugs, aphids -- Complete metamorphosis. Insect orders -- Coleoptera : beetles -- Megaloptera : dobsonflies -- Neuroptera : antlions and lacewings -- Raphidioptera : snakeflies -- Hymenoptera : wasps, bees, and ants -- Siphonaptera : fleas -- Mecoptera : hangingflies -- Strepsiptera : twisted-wing parasites -- Diptera : flies -- Trichoptera : caddisflies -- Lepidoptera : butterflies and moths -- Spiders -- More about bugs.