Class Insecta

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Class Insecta

• Sixteen orders

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Order Thysanoptera

• Thrips
• Intermediate
• Raspingmouthparts
• Flower buds
• enclosed spaces
• 4 Feathery wings
• poorlydeveloped
• Vectors
• Some predaceous

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Order Thysanoptera

• Intermediate
• E, N1-2, Pre, Pseudo, A
• Eggs in plant tissue
• 2 active larvaeprepupae pseudopupae in the
  soil
• Adults onplants

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Order Homoptera

• Aphids, scales, whiteflies, cicadas
• Incomplete
• Piercing-sucking mouthparts
• Secrete honeydew
• Whiteflies
• scale insects
• APHID INFO
• Apical meristems
• New growth
• Low N
• Complex L.C.
• E (overwinter),
• none in summer,
• N2-4, A
• Appendages
• cornicles
• cauda

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Order Homoptera
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Order Homoptera

• Intermediate Life Cycle

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Order Hemiptera

• True bugs
• Incomplete
• Piercing-sucking
• Triangular scutellum
• 4 wings (hemelytra)
• E (soil or plant tissue), N2-4, A
• Predators
• spined shoulders

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Order Orthoptera

• Grasshoppers crickets
• Incomplete
• Chewing mouthparts
• 2 pairs of wings
• -outer leather
• -inner membranous
• E, N2-4, A
• Hind legs modifiedfor jumping
• Abdominal cerci
• Tympanum

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Order Coleoptera

• Beetles weevils
• Complete
• Chewing mouthparts
• 4 wings
• 1st pair hardened shell elytra
• E, L2-4, P, A
• Chewing larvae adults
• Weevils have snout

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Order Lepidoptera

• Moths butterflies
• Complete
• Larvae chewing
• Adults siphoning
• 2 pairs wings
• Covered in scales
• E (on/in plants), L2-4, P, A
• Moths
• Filamentous antennae
• Wings held flat
• Butterflies
• Clubbed antennae
• Wings folded up

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Order Hymenoptera

• Ants, bees, wasps, sawflies
• Complete
• Larvae chew
• Adults chew suck
• 4 wings
• Social insects
• Pollinators predators
• Female stingers,ovipositors

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Order Diptera

• True flies
• Complete
• Adults have biting,sucking, spongingmouthparts
• Maggots have hook
• 1 pair wings
• Halteres
• Complete

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Order Dermaptera

• Earwigs
• Incomplete
• Chewing mouthparts
• Squirt foul liquid, inflict pinches
• Few have functional wings
• Omnivorous
• Nocturnal
• Abdominal forceps

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Order Phasmatodea

• Walkingsticks/ stick insects/ leaf insects/
  phasmids
• Incomplete
• Defense tactics
• Noise
• Smell
• Postures
• Colouration
• Shedding legs
• Some species
• Winged
• Reduced wings
• Wingless
• Temperate zones
• No control necessary

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Order Neuroptera

• Lacewings antlions
• Complete
• Beneficials
• 4 wings (finely veined)
• Larvae are cannibalistic
• Adults eat pollen,nectar or honeydew

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Order Odonata

• Dragonflies
• Incomplete
• All stages predaceous
• 2 pairs of wings
• Naiads

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Order Mantodea

• Mantids, praying mantis
• Incomplete
• Beneficial
• Large front legs
• Spined for holding prey
• Uses camouflage
• o/w in egg sac
• One generation/yr

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Order Collembola

• Springtails
• None
• Egg
• Young just smaller than adult
• Wingless
• Furcula
• Scavengers
• Decompose organic matter
• Most abundant soil-dwellers
• Less than 6mm

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Order Isoptera

• Termites (subterranean, rottenwood)
• Incomplete
• Only hemimetabolous insect that exhibits true
  social behaviour
• Decomposers
• Cannot digest wood fibers
• Digestive system contains symbioticprotozoa or
  bacteria
• Termites live on the by-products
• Annual loss in US
• 800 million

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Order Blattodea

• Cockroach
• Incomplete
• Cosmopolitan
• Human pathogens
• Research tools
• Physiology
• Toxicology
• dander allergies
• Nocturnal
• Madagascar hissing