True Bugs, Cicadas, Hoppers, Aphids and Allies (Hemiptera) - Order
(Auchenorrhyncha) - suborder
The Aquatic Bugs (Cicadomorpha) - infraorder
(Cercopoidea) - superfamily

(Aphrophoridae)
- family

(Cercopidae)
- family

(Clastopteridae)
- family

(Epipygidae)
- family

(Machaerotidae)
- family
(Cicadoidea) - superfamily

(Tettigarctidae)
- family

(Cicadidae)
- family
(Membracoidea) - superfamily

(Aetalionidae)
- family

(Cicadellidae)
- family

(Melizoderidae)
- family

(Membracidae)
- family

(Myerslopiidae)
- family
(Palaeontinoidea) - superfamily -extinct-

(Mesogereonidae)
- family -extinct-

(Dunstaniidae)
- family -extinct-

(Palaeontinidae)
- family -extinct-
The Aquatic Bugs (Fulgoromorpha) - infraorder

(Acanaloniidae)
- family

(Achilidae)
- family

(Achilixiidae)
- family

(Caliscelidae)
- family

(Cixiidae)
- family

(Delphacidae)
- family

(Derbidae)
- family

(Dictyopharidae)
- family

(Eurybrachidae)
- family

(Flatidae)
- family

(Fulgoridae)
- family

(Gengidae)
- family

(Hypochthonellidae)
- family

(Issidae)
- family

(Kinnaridae)
- family

(Lophopidae)
- family

(Meenoplidae)
- family

(Nogodinidae)
- family

(Ricaniidae)
- family

(Tettigometridae)
- family

(Tropiduchidae)
- family
The Moss Bugs (Coleorrhyncha) - suborder

(Hoploridiidae)
- family -extinct-

(Karabasiidae)
- family -extinct-

(Peloridiidae)
- family

(Progonocimicidae)
- family -extinct-
The True Bugs (Heteroptera) - suborder
The Aquatic Bugs (Nepomorpha) - infraorder
(Nepoidea) - superfamily
Giant Water Bugs
(Belostomatidae)
- family
(Gerromorpha) - infraorder
(Gerroidea) - superfamily

(Gerridae)
- family
(Heteroptera) - infraorder
(Coreoidea) - superfamily
broad-headed bugs
(Alydidae)
- family
Leaf-Footed Bugs & Squash Bugs
(Rhopalidae)
- family

(Hyocephalidae)
- family
scentless plant bugs
(Rhopalidae)
- family

(Stenocephalidae)
- family
(Nepomorpha) - infraorder
(Nepoidea) - superfamily

(Balostomatidae)
- family
() - suborder
() - superfamily

()
- family

()
- family

()
- family

()
- family
(Pentatomomorpha) - infraorder
(Lygaeoidea) - superfamily

(Lygaeidae)
- family
The Stink Bugs
(Pentatomidae)
- family
The Plant Sucking Bugs (Sternorrhyncha) - infraorder
(Aleyrodoidea) - superfamily
The Whiteflies
(Aleyrodidae)
- family
The Aphids (Aphidoidea) - superfamily

(Phylloxeridae)
- family
The Woolly Conifer Aphids
(Adelgidae)
- family
The Aphids
(Aphididae)
- family
(Phylloxeroidea) - superfamily

(Adelgidae)
- family

(Phylloxeridae)
- family
(Psylloidea) - superfamily

(Aphalaridae)
- family

(Calophyidae)
- family

(Carsidaridae)
- family

(Homotomidae)
- family

(Phacopteronidae)
- family

(Psyllidae)
- family

(Triozidae)
- family
(Sternorrhyncha) - suborder
(Aleyrodoidea) - superfamily

(Aleyrodidae)
- family
(Aphidoidea) - superfamily

(Phylloxeridae)
- family
The Woolly Conifer Aphids
(Adelgidae)
- family
The Aphids
(Aphididae)
- family
(Coccoidea) - superfamily
(Archaeococcoids) - subdivision
The Bird of Pparadise Scales
(Callipappidae)
- family

(Coelostomioiidae)
- family

(Kuwanniidae)
- family
The Ground Pearls
(Margarodidae)
- family
The Pine Bast Scales
(Matsucoccidae)
- family
The Cottony Cushion Scales
(Monophlebidae)
- family
The Ensign Scales
(Ortheziidae)
- family

(Phenacoleachiidae)
- family

(Pityococcidae)
- family
The Giant Mealybugs
(Putoidae)
- family

(Steingeliidae)
- family

(Stigmacoccidae)
- family

(Xylococcidae)
- family
(Neococcoids) - subdivision

(Aclerdidae)
- family
The Pit Scales
(Asterolecaniidae)
- family

(Beesoniidae)
- family

(Carayonemidae)
- family

(Cerococcidae)
- family
The Soft Scales
(Coccidae)
- family

(Conchaspididae)
- family
The Cochineal
(Dactylopiidae)
- family
The Armored Scales
(Diaspididae)
- family
The Felted Scales
(Eriococcidae)
- family

(Halimococcidae)
- family

(Kermesidae)
- family
The Lac Scales
(Kerriidae)
- family

(Lecanodiaspididae)
- family

(Micrococcidae)
- family

(Phoenicococcidae)
- family
The Mealybugs
(Pseudococcidae)
- family

(Stictococcidae)
- family
(Phylloxeroidea) - superfamily

(Adelgidae)
- family

(Phylloxeridae)
- family
(Psylloidea) - superfamily

(Aphalaridae)
- family

(Calophyidae)
- family

(Carsidaridae)
- family

(Homotomidae)
- family

(Phacopteronidae)
- family

(Psyllidae)
- family

(Triozidae)
- family