Discovering bugs -- Simple metamorphosis : insect orders. Ephemeroptera : mayflies ; Dermaptera : earwigs ; Notoptera : icebugs and gladiators ; Plecoptera : stoneflies ; Phasmatodea : stick insects and leaf insects ; Orthoptera : grasshoppers, katydids, and crickets ; Mantodea : mantises ; Blattodea : termites and cockroaches ; Phthiraptera : lice ; Thysanoptera : thrips ; Hemiptera : scale insects, aphids, whiteflies, cicadas, treehoppers, planthoppers, leafhoppers, peanut bugs, bedbugs, and other true bugs -- Complete metamorphosis : insect orders. Coleoptera : beetles ; Megaloptera : alderflies, dobsonflies, and fishflies ; Neuroptera : lacewings and antlions ; Hymenoptera : ants, bees, sawflies, and wasps ; Siphonaptera : fleas ; Diptera : flies ; Trichoptera : caddisflies ; Lepidoptera : butterflies and moths -- More about bugs.