List of insect orders

There are about 30 different insect orders, which can be divided in three main groups.

Apterygota

Thysanura	Bristletails
Diplura	Diplurans
Protura	Proturans
Collembola	Springtails

Exopterygota

Ephemeroptera	Mayflies
Odonata	Dragonflies and Damselflies
Orthoptera (*)	Grasshoppers and Crickets
Dictyoptera	Cockroaches and Mantids
Grylloblatodea	Rock crawlers
Phasmida	Walking sticks and Leaf insects
Dermaptera	Earwigs
Isoptera (*)	Termites
Embioptera	Webspinners
Plecoptera	Stoneflies
Zoraptera	Zorapterans
Psocoptera	Psocids
Mallophaga	Chewing lice
Anoplura	Sucking lice
Thysanoptera (*)	Thrips
Hemiptera: Heteroptera (*)	Bugs
Hemiptera: Homoptera (*)	Cicadas, Hoppers, Psyllids, Whiteflies, Aphids, and Scale insects

Endopterygota

Neuroptera	Alderflies, Dobsonflies, Fishflies, Snakeflies, Lacewings, Antlions and Owlflies
Coleoptera (*)	Beetles
Strepsiptera	Twisted-winged parasites
Mecoptera	Scorpionflies
Trichoptera	Caddisflies
Lepidoptera (*)	Butterflies and Moths
Diptera (*)	Flies
Siphonaptera	Fleas
Hymenoptera (*)	Sawflies, Ichneumons, Chalcids, Ants, Wasps and Bees

(*) = Most important orders which contain many agricultural pests