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Ametabola

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Thysanura(Silverfish / Firebrats / Bristle tail)

Greek "thysano-" meaning fringed "ura" meaning tail.

Body relatively flat, tapered and often covered with scales.

Compound eyes small or absent.

Antennae long, thread-like, and multisegmented .

Abdomen with ten complete segments.

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DipluraDouble tail

The name Diplura, derived from the Greek words "diplo-" meaning two and "ura" meaning tails.

•These small, eyeless arthropods.•They have a pair of long beaded antennae (moniliform) on the head .•A pair of segmented sensory structures (cerci).•Long and slender, or forceps-like in appearance .•Tarsi one-segmented .

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ProturaTelson tail

The name Protura, derived from the Greek words "proto-" meaning first (or original) and "ura" meaning tail.

Antennae absent.Compound eyes absent.Front legs directed forward (probably sensory in function).Abdomen with 9-12 complete segments.Cerci and abdominal filaments entirely absent.

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Collembola(Springtails)

The name Collembola, derived from the Greek "coll" meaning glue and "embol" meaning a wedge.

•Compound and simple eyes are absent.•Filliform Antennae present,•Abdomen 6-segmented .•Body frequently clothed with scales .

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Metabola

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Ephemeroptera(Mayflies)

Antennae short and Setaceous. Four to nine pairs of leaf-like or

fan-like gills along the sides of the abdomen .

Front wings large, triangular hind wings smaller, fan-shaped

Three long filaments at rear of abdomen .

Greek "ephemera" meaning short-lived, "ptera" meaning wings. 

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Odonata(Dragonflies and Damselflies)

Greek "odonto-", meaning tooth, refers to the strong teeth found on the mandibles of most adults.

Antennae short ,Setaceous.Compound eyes large.Four membranous wings.Chewing mouth part. Legs are used either as a basket for catching prey or as grapples for clinging to emergent vegetation. 

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Plecoptera(Stoneflies)

Greek "pleco" meaning folded and "ptera"meaning wing, refers to the pleated hind wings.

• Antennae long, filiform.• Front wings long and narrow.• Body flattened.

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Grylloblattodea(Rock Crawlers / Icebugs)

Greek "gryll" meaning cricket and "blatta" meaning cockroach.

• Antennae slender, filiform .• Mouthparts is chewing.• Body cylindrical • Tarsi 5-segmented .• Secondarily wingless .

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Orthoptera(Grasshoppers / Locusts Crickets / Katydids)

Greek "ortho" meaning straight and "ptera" meaning wing.

Slender, thickened front wings fold back over the abdomen to protect membranous, hind wings. Chewing mouthpart. Hind leg is jumping leg.

Antennae filiform.

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Phasmida(Walkingsticks / Stick Insects / Leaf Insects)

Greek "phasm" meaning phantom.

•Antennae short filliform.•Mouthparts is chewing.•Body long, cylindrical.•Meso and meta thorax is long in Stick insect while broad in leaf insect.

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Dermaptera(Earwigs)

Greek "derma" meaning skin and "ptera" meaning wings.

Active at night.  Chewing mouthpart.Antennae slender, long filliform .Forewings short, thick,veinless

and leathery .Hind wings membranous and

folded under forewings.

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Embioptera (Webspinners / Embiids)

Greek "embio" meaning lively and "ptera" meaning wings.

Antennae slender, filiform . Mouthparts is chewing. Tarsi 3-segmented,bearing silk

glands .Asymmetrical circi.

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Dictyoptera

The name Blattodea is derived from "blatta", the Greek word for cockroach.

• Antennae slender, filiform .• Much of the head and thorax is

covered and protected dorsally by a large plate of exoskeleton (the pronotum). • Legs adapted for running.• Front wings thickened; hind wings

membranous, pleated .• Stylus present at 9 segment.

(Cockroaches / Waterbugs / Mentid)

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Isoptera(Termites / White Ants)

Greek "iso" meaning equal and "ptera" meaning wings.

•Head large and cylindrical or small and round.• Antennae long moniliform.•Compound eyes present.•Two pairs of membranous wings.

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Zoraptera(Zorapterans / Angel Insects)

Name, derived from the Greek "zor" meaning pure and "aptera" meaning wingless.

• Moniliform Antennae 9-segmented.• Mouthparts is chewing.• Wings often absent, with

reduced venation when present.• Long stylus, short unsegmentes

circi.

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PsocopteraPsocids / Barklice / Booklice

The name Psocoptera is derived from the Greek "psokos" meaning rubbed or gnawed and "ptera" meaning wings.

•Head prominent, with Lonf filiform antennae.•Narrow "neck" between head and thorax.•Two pairs of wings; some species are wingless.•Tarsi 2- or 3-segmented

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MallophagaBiting Lice / Bird lice / Chicken lice

•Chewing or biting type.•Head is broad.•Antennae short filliform; 3-5 segmented.•Clinging legs.•Eyes reduced or absent•Tarsi 1- or 2-segmented, most species have two small claws.

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SiphonculataSucking Lice / Mammal Lice / Human Lice

•Head conical, with suctorial mouthparts•Antennae short filliform, 3- to 5-segmented•Eyes reduced or absent•Tarsi usually 1-segmented with a single large claw.

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HemipteraTrue Bugs

The name Heteroptera, derived from the Greek "hetero-" meaning different and "ptera" meaning wings.

• Long filliform Antennae with 4-5 segments.•Proboscis 3-4 segmented, arising from front of head .•Tarsi 2- or 3-segmented.•Circi absent.

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HomopteraPlant hoppers / Tree hoppers / /white fly / Aphid / Jasid

Short setaceous antenna.Piercing sucking mouthpart.Membranous or hard throughout of forewings.Circi absent.

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ThysanopteraThrips

The name Thysanoptera, derived from the Greek "thysanos" meaning fringe and "ptera" meaning wings.

•Antennae short moniliform, 6-10 segments.•Body cylindrical or spindle-shaped.•Front and hind wings slender, rod-like, with a dense fringe of long hairs.  Many species are secondarily wingless.•Rod like stripy wings.•End of abdominal tube present called oviposter.

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NeuropteraLacewings / Antlions / Dobsonflies / Alderflies / Snakeflies

The name Neuroptera is derived from the Greek word "neuron" meaning sinew and "ptera" meaning wings.

•Antennae long setaceous.•Chewing mouthparts.•Front and hind wing membranous, similar in size.•Extensive branching of venation in all wings.

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ColeopteraBeetles / Weevils

The name Coleoptera, derived from the Greek words "koleos" meaning sheath and "ptera" meaning wings.

Coleoptera (beetles and weevils) is the largest order in the class Insecta. 

•Chewing mouthparts (sometimes located at the tip of a beak) .•Front wings (elytra) are hard and serve as covers for the hind wings; meet in a line down the middle of the back .•Hind wings large, membranous, folded beneath the elytra .•Tarsi 2- to 5-segmented .

•Most beetles have a hard, dense exoskeleton .

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StrepsipteraTwisted-wing parasites / Stylopids / Strepsipterans

The name Strepsiptera, derived from the Greek "strepsi" meaning turned or twisted and "ptera" meaning wings.

• Large fan-shaped hind wings; small club-like front wings.• Forewing form haltere.• Vestigial and chewing

mouthparts.• Antennae 4- to 7-segmented;

often with lateral branching.• Flabellate antenna.• Protruded eyes.

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MecopteraScorpionflies / Hangingflies

The name Mecoptera, derived from the Greek words "meco" meaning long and "ptera" meaning wings.

•Head elongate with slender chewing mouthparts.•Front and hind wings narrow, elongate, and similar in size; crossveins numerous. •Tarsi 5-segmented•Males of some species have enlarged external genitalia held recurved over the abdomen like a scorpion's tail. •Raised abdomen.•Long narrow similar wings

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DipteraTrue Flies / Mosquitoes / Gnats / Midges

The name Diptera, derived from the Greek words "di" meaning two and "ptera" meaning wings.

Antennae filiform, stylate, or aristate .Mouthparts suctorial.Mesothorax larger than pro- or metathorax .One pair of wings (front); hind wings reduced (halteres) .Tarsi 5-segmented .

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SiphonapteraFleas

The name Siphonaptera is derived from the Greek words "siphon" meaning a tube or pipe and "aptera" meaning wingless.

•Short setaceous antenna.•Body bilaterally flattened•Mouthparts piercing sucking. •Large bristles (ctenidia) often present on head or thorax .•Hind femur enlarged, adapted for jumping.

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LepidopteraButterflies / Moths

The name Lepidoptera, derived from the Greek words "lepido" for scale and "ptera" for wings.

Lepidoptera (moths and butterflies) is the second largest order in the class Insecta.  •Mouthparts form a coiled tube (proboscis) beneath the head.•Antennal type:

Butterflies: ClavateMoths: thread-like, spindle-shaped, or

comb-like•Front wings large, triangular; hind wings large, fan-shaped.•Body and wings covered with small, overlapping scales.

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TrichopteraCaddisflies

The name Trichoptera, derived from the Greek words "trichos" meaning hair and "ptera" meaning wings.

Setaceous antennae.Mouthparts reduced or vestigal.Two pairs of wings clothed with long hairs.Wings held tent-like over the abdomen.

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HymenopteraAnts / Wasps / Bees / Sawflies / Horntails

The name Hymenoptera is derived from the Greek words "hymen" meaning membrane and "ptera" meaning wings.

•Chewing mouthparts - except in bees where maxillae and labium form a proboscis for collecting nectar. •Compound eyes well developed. •Tarsi usually 5-segmented. •Triangular stigma in front wings. •Hind wings smaller than front wings.•Geniculate antenna.•Sucking/Licking/Chewing mouthpart.