| Acanthosomatidae Signoret, 1864 | Acanthosomatids | 0 | Species | Taxom |
| Acrididae MacLeay, 1819 | Grasshoppers and locusts | 68 | Species | Taxom |
| Adelgidae Heinze, 1962 | Adelgids | 1 | Species | Taxom |
| Adelidae Bruand, 1851 | Adelid Moths | 1 | Species | Taxom |
| Aderidae Winkler, 1927 | Ant-like leaf beetles | 4 | Species | Taxom |
| Aeshnidae Rambur, 1842 | Darners | 29 | Species | Taxom |
| Agaonidae Walker, 1848 | Fig wasp | 5 | Species | Taxom |
| Agromyzidae Fallen, 1823 | Leaf miner flies | 31 | Species | Taxom |
| Agyrtidae Thomson, 1859 | Primitive carrion beetles | 1 | Species | Taxom |
| Aleyrodidae Westwood, 1840 | Whiteflies | 51 | Species | Taxom |
| Alydidae Amyot & Serv..., 1843 | Bean bugs | 5 | Species | Taxom |
| Amorphoscelidae Stål, 1877 | | 1 | Species | Taxom |
| Amphientomidae Enderlein, 1903 | Tropical Barklice | 1 | Species | Taxom |
| Amphipsocidae Mockford, 1978 | Hairy-winged Barklice | 1 | Species | Taxom |
| Amphipterygidae Selys, 1853 | | 3 | Species | Taxom |
| Ampulicidae Shuckard, 1840 | Ampulicid wasps | 2 | Species | Taxom |
| Ancistropsyllidae Toumanoff & ..., 1947 | | 1 | Species | Taxom |
| Andrenidae Webster, 1913 | Andrenid bees | 2 | Species | Taxom |
| Anisolabididae Verhoeff, 1902 | | 1 | Species | Taxom |
| Anisopodidae Knab, 1912 | Window Midges | 1 | Species | Taxom |
| Anthicidae Latreille, 1819 | Ant beetles | 35 | Species | Taxom |
| Anthocoridae Fieber, 1837 | Flower bugs | 7 | Species | Taxom |
| Anthomyiidae Robineau-Des..., 1830 | Anthomyiid flies | 2 | Species | Taxom |
| Anthomyzidae Czerny, 1903 | Anthomyzid flies | 1 | Species | Taxom |
| Anthribidae Billberg, 1820 | Fungus Weevil | 10 | Species | Taxom |
| Apataniidae Wallengren, 1886 | Early Smoky Wing Sedges | 7 | Species | Taxom |
| Aphalaridae Löw, 1879 | | 2 | Species | Taxom |
| Aphelinidae Thomson, 1876 | Aphelinid wasps | 15 | Species | Taxom |
| Aphelocheiridae Fieber, 1851 | | 4 | Species | Taxom |
| Aphididae Latreille, 1802 | Aphid | 40 | Species | Taxom |
| Aphodiidae Leach, 1815 | | 5 | Species | Taxom |
| Aphrophoridae Evans, 1946 | Froghoppers | 6 | Species | Taxom |
| Apidae Latreille, 1802 | Bumble bees | 132 | Species | Taxom |
| Aradidae Spinola, 1837 | Flat bug | 1 | Species | Taxom |
| Archeocrypticidae Kaszab, 1964 | Ancient Fungus Beetles | 1 | Species | Taxom |
| Arctiidae Leach, 1815 | Footman moths | 3 | Species | Taxom |
| Argidae Konow, 1890 | Argid flies | 1 | Species | Taxom |
| Ascalaphidae Rambur, 1842 | Owlflies | 1 | Species | Taxom |
| Aschiphasmatidae Brunner von ..., 1893 | | 1 | Species | Taxom |
| Asilidae Latreille, 1802 | Assassin flies | 61 | Species | Taxom |
| Asterolecaniidae Cockerell, 1896 | Asterolecaniids | 1 | Species | Taxom |
| Athericidae Stuckenberg, 1973 | Athericid flies | 2 | Species | Taxom |
| Attelabidae Billberg, 1820 | Leaf Rolling Weevil | 109 | Species | Taxom |
| Aulacidae Shuckard, 1842 | Aulacid wasps | 1 | Species | Taxom |
| Aulacigastridae Wollaston, 1864 | Aulacigastrid flies | 3 | Species | Taxom |
| Austropetaliidae Carle & Louton, 1994 | Redspot Dragonflies | 1 | Species | Taxom |
| Baetidae Leach, 1815 | Mayflies | 5 | Species | Taxom |
| Belostomatidae Leach, 1815 | Alligator ticks | 5 | Species | Taxom |
| Berytidae Fieber, 1851 | Stilt bug | 1 | Species | Taxom |
| Bethylidae Halliday, 1839 | Bethylid wasps | 10 | Species | Taxom |
| Bibionidae Fleming, 1821 | Bibionid flies | 4 | Species | Taxom |
| Bittacidae Handlirsch, 1906 | Hanging scorpionflies | 1 | Species | Taxom |
| Blaberidae Saussure, 1864 | Blaberids | 32 | Species | Taxom |
| Blattellidae (Karny, 1908) | German Cockroach | 30 | Species | Taxom |
| Blattidae Stephens, 1829 | American cockroaches | 6 | Species | Taxom |
| Blephariceridae Loew, 1861 | Mountain midges | 2 | Species | Taxom |
| Blissidae Stål, 1862 | Chinch Bugs | 13 | Species | Taxom |
| Bombycidae Latreille, 1802 | Lappet moths | 14 | Species | Taxom |
| Bombyliidae Latreille, 1802 | Bee Flies | 4 | Species | Taxom |
| Bostrichidae Latreille, 1802 | Auger beetles | 14 | Species | Taxom |
| Brachodidae Agenjo, 1966 | Little Bear Moths | 2 | Species | Taxom |
| Brachystomatidae Melander, 1908 | | 2 | Species | Taxom |
| Braconidae Latreille, 1829 | Braconid wasps | 197 | Species | Taxom |
| Brahmaeidae Swinhoe, 1892 | Brahmin Moths | 1 | Species | Taxom |
| Brentidae Billberg, 1820 | Brenthidae | 3 | Species | Taxom |
| Buprestidae Leach, 1815 | Flat-headed wood-borers | 136 | Species | Taxom |
| Byrrhidae Latreille, 1804 | Moss beetles | 0 | Species | Taxom |
| Byturidae Jacquelin du..., 1858 | Fruit worms | 1 | Species | Taxom |
| Caeciliusidae Kolbe, 1880 | Lizard Barklice | 1 | Species | Taxom |
| Calamoceratidae Ulmer, 1905 | | 14 | Species | Taxom |
| Caliscelidae Amyot & Serv..., 1843 | Piglet Bugs | 3 | Species | Taxom |
| Callidulidae Moore, 1877 | Old World Butterfly Moths | 7 | Species | Taxom |
| Calliphoridae Brauer & Ber..., 1889 | Blow flies | 47 | Species | Taxom |
| Callirhipidae Emden, 1924 | Callirhipid beetles | 1 | Species | Taxom |
| Calophyidae Vondracek, 1957 | | 1 | Species | Taxom |
| Calopsocidae (Pearman, 1936) | Common barklice | 1 | Species | Taxom |
| Calopterygidae Selys, 1850 | Broad-winged damselflies | 15 | Species | Taxom |
| Canaceidae (Jones, 1906) | Beach flies | 5 | Species | Taxom |
| Cantharidae Imhoff, 1856 | Cantharids | 39 | Species | Taxom |
| Carabidae Latreille, 1802 | Carabid beetles | 776 | Species | Taxom |
| Carcinophoridae Hincks, 1954 | | 1 | Species | Taxom |
| Carsidaridae Crawford, 1911 | | 2 | Species | Taxom |
| Castniidae Boisduval, 1828 | Castniid moths | 1 | Species | Taxom |
| Cecidomyiidae Newman, 1834 | Cecidomyidae | 9 | Species | Taxom |
| Celyphidae Bigot, 1852 | Beetle flies | 6 | Species | Taxom |
| Cerambycidae Latreille, 1802 | Long Horn beetles | 1008 | Species | Taxom |
| Ceraphronidae Haliday, 1833 | Ceraphronid wasps | 0 | Species | Taxom |
| Ceratopogonidae Newman, 1834 | Biting midge | 134 | Species | Taxom |
| Cercopidae Leach, 1815 | Froghopper | 44 | Species | Taxom |
| Cerylonidae Billberg, 1820 | Cerylid Kingfishers | 3 | Species | Taxom |
| Cetoniidae (Leach, 1815) | Flower beetles | 1 | Species | Taxom |
| Chalcididae Latreille, 1817 | Chalcidid wasps | 7 | Species | Taxom |
| Chaoboridae Newman, 1834 | Phantom midge | 1 | Species | Taxom |
| Chelisochidae Burr, 1907 | Black earwig | 2 | Species | Taxom |
| Chironomidae Erichson, 1842 | Chironomids | 40 | Species | Taxom |
| Chlorocyphidae Cowley, 1937 | Jewel damselfly | 13 | Species | Taxom |
| Chlorogomphidae Needham, 1903 | | 2 | Species | Taxom |
| Chlorolestidae (Fraser, 1960) | | 3 | Species | Taxom |
| Chloroperlidae Okamoto, 1912 | Green stoneflies | 1 | Species | Taxom |
| Chloropidae Schoenherr, 1840 | Chloropid flies | 10 | Species | Taxom |
| Choreutidae Stainton, 1854 | Choreuitid Moths | 2 | Species | Taxom |
| Chorotypidae Stål, 1873 | | 12 | Species | Taxom |
| Chrysididae Latreille, 1802 | Chrysidid wasps | 8 | Species | Taxom |
| Chrysomelidae Latreille, 1802 | Casebearers | 145 | Species | Taxom |
| Chrysopidae Schneider, 1851 | And Green Lacewings | 3 | Species | Taxom |
| Cicadellidae Latreille, 1802 | Cicadellids | 420 | Species | Taxom |
| Cicadidae Westwood, 1840 | Cicada | 202 | Species | Taxom |
| Ciidae Leach, 1819 | Minute tree fungus beetles | 3 | Species | Taxom |
| Cimbicidae Kirby, 1837 | Cimbicid sawflies | 1 | Species | Taxom |
| Cimicidae Latreille, 1802 | Bat bugs | 4 | Species | Taxom |
| Cixiidae Spinola, 1839 | Cixid planthoppers | 3 | Species | Taxom |
| Clambidae Fischer, 1821 | Fringe-winged beetles | 2 | Species | Taxom |
| Cleridae Latreille, 1802 | Checkered Beetle | 6 | Species | Taxom |
| Clusiidae Schönherr, 1840 | Clusiid flies | 3 | Species | Taxom |
| Coccidae Stephens, 1829 | Soft scale | 37 | Species | Taxom |
| Coccinellidae Latreille, 1807 | Coccinelles | 32 | Species | Taxom |
| Coenagrionidae Kirby, 1890 | Narrow-winged damselflies | 44 | Species | Taxom |
| Coleophoridae Hübner, 1825 | Case moths | 6 | Species | Taxom |
| Conopidae Latreille, 1802 | Thick-headed Flies | 3 | Species | Taxom |
| Cordulegastridae Calvert, 1893 | Biddie | 1 | Species | Taxom |
| Corduliidae Selys-Longch..., 1850 | Baskettails | 15 | Species | Taxom |
| Coreidae Leach, 1815 | Broad-headed bugs | 32 | Species | Taxom |
| Corioxenidae Kinzelbach, 1970 | | 1 | Species | Taxom |
| Corydalidae Burmeister, 1839 | Dobsonflies | 5 | Species | Taxom |
| Corydiidae de Saussure, 1864 | Sand cockroaches | 4 | Species | Taxom |
| Cosmopterigidae Heinemann & ..., 1876 | Cosmet Moths | 2 | Species | Taxom |
| Cossidae Leach, 1815 | Borers | 58 | Species | Taxom |
| Crabronidae Latreille, 1802 | Bee Wolves | 7 | Species | Taxom |
| Crambidae Latreille, 1810 | Crambid Snout Moths | 180 | Species | Taxom |
| Cucujidae Latreille, 1802 | Flat bark beetles | 7 | Species | Taxom |
| Culicidae Meigen, 1818 | Mosquito | 579 | Species | Taxom |
| Curculionidae Latreille, 1802 | Ambrosia beetles | 111 | Species | Taxom |
| Curtonotidae Duda, 1934 | Curtonotid flies | 2 | Species | Taxom |
| Cydnidae Billberg, 1820 | Burrower bugs | 3 | Species | Taxom |
| Cylindrotomidae (Mulsant, 1842) | Cylindrotomid Crane Flies | 1 | Species | Taxom |
| Cymidae Baerensprung, 1860 | | 1 | Species | Taxom |
| Cypselosomatidae Hennig, 1958 | Cypselosomatid flies | 3 | Species | Taxom |
| Dactylopiidae Signoret, 1875 | Cochineal insects | 1 | Species | Taxom |
| Danaidae (Boisduval, 1833) | Milkweed Butterflies | 1 | Species | Taxom |
| Dascillidae Guérin-Ménev..., 1843 | Orchid beetles | 1 | Species | Taxom |
| Delphacidae Leach, 1815 | Delphacid planthoppers | 14 | Species | Taxom |
| Derbidae Spinola, 1839 | Derbid planthoppers | 5 | Species | Taxom |
| Dericorythidae Jacobson & B..., 1902 | | 1 | Species | Taxom |
| Dermestidae Hope, 1840 | Carpet beetles | 19 | Species | Taxom |
| Diapheromeridae Rehn & Hebard, 1909 | Diapheromerid Stick Insects | 29 | Species | Taxom |
| Diapriidae Latreille, 1796 | Diapriid wasps | 2 | Species | Taxom |
| Diaspididae Maskell, 1878 | Armored scale insects | 70 | Species | Taxom |
| Diastatidae Hendel, 1917 | Bog flies | 1 | Species | Taxom |
| Dictyopharidae Spinola, 1839 | Dictyopharid Planthoppers | 5 | Species | Taxom |
| Dilaridae Newman, 1853 | Pleasing lacewing | 1 | Species | Taxom |
| Dinidoridae Stål, 1867 | Dinidorid bug | 3 | Species | Taxom |
| Diopsidae Billberg, 1820 | Stalk-eyed flies | 4 | Species | Taxom |
| Diplatyidae (Verhoeff, 1902) | | 1 | Species | Taxom |
| Diprionidae Rohwer, 1911 | Conifer sawflies | 6 | Species | Taxom |
| Dipseudopsidae Ulmer, 1904 | | 5 | Species | Taxom |
| Discolomatidae Horn, 1878 | | 2 | Species | Taxom |
| Dixidae Schiner, 1868 | Dixid Midges | 3 | Species | Taxom |
| Dolichopodidae Latreille, 1809 | Long legged flies | 59 | Species | Taxom |
| Drepanidae Meyrick, 1895 | Drepanids | 30 | Species | Taxom |
| Drosophilidae Rondani, 1856 | Fruit flies | 38 | Species | Taxom |
| Dryopidae Billberg, 1820 | Long toed water beetle | 3 | Species | Taxom |
| Dytiscidae Leach, 1815 | Diving beetles | 49 | Species | Taxom |
| Ecnomidae Ulmer, 1903 | | 46 | Species | Taxom |
| Ectobiidae (Brunner von ..., 1865) | Wood cockroaches | 1 | Species | Taxom |
| Elachistidae Bruand, 1851 | Elachistid moths | 5 | Species | Taxom |
| Elateridae Leach, 1815 | Click Beetle | 168 | Species | Taxom |
| Elmidae Curtis, 1830 | Drive beetles | 15 | Species | Taxom |
| Empididae Latreille, 1809 | Balloon flies | 26 | Species | Taxom |
| Empusidae Burmeister, 1838 | Violin mantises | 1 | Species | Taxom |
| Encyrtidae Walker, 1837 | Encyrtid wasps | 24 | Species | Taxom |
| Enderleinellidae Ewing, 1929 | | 2 | Species | Taxom |
| Endomychidae Leach, 1815 | False Ladybirds | 17 | Species | Taxom |
| Eneopteridae (Saussure, 1893) | Bush cricket | 5 | Species | Taxom |
| Epermeniidae Spuler, 1910 | Epermeniid moths | 3 | Species | Taxom |
| Ephemerellidae (Klapálek, 1909) | Blue-Winged Olive Ephemerellidae | 4 | Species | Taxom |
| Ephemeridae Leach, 1817 | Burrowing mayflies | 1 | Species | Taxom |
| Ephydridae Zetterstedt, 1837 | Brine flies | 21 | Species | Taxom |
| Epicopeiidae Swinhoe, 1892 | Oriental Swallowtail Moths | 1 | Species | Taxom |
| Epipsocidae | Elliptical bark louse | 1 | Species | Taxom |
| Erebidae Leach, 1815 | Erebid Moths | 476 | Species | Taxom |
| Eremiaphilidae Wood-Mason, 1889 | | 1 | Species | Taxom |
| Eriococcidae Cockerell, 1899 | Eriococcid scales | 2 | Species | Taxom |
| Erotylidae Latreille, 1802 | Pleasing Fungus Beetle | 9 | Species | Taxom |
| Eucharitidae Latreille, 1809 | Eucharitid wasp | 4 | Species | Taxom |
| Eucinetidae Lacordaire, 1857 | Plate-thigh beetle | 1 | Species | Taxom |
| Eucnemidae Eschscholtz, 1829 | Click Beetles | 1 | Species | Taxom |
| Eulichadidae Crowson, 1973 | Forest stream beetle | 3 | Species | Taxom |
| Eulophidae Westwood, 1829 | Eulophid wasps | 14 | Species | Taxom |
| Eupelmidae Walker, 1833 | Eupelmid wasps | 3 | Species | Taxom |
| Euphaeidae Jacobson & B..., 1905 | Gossamerwings | 14 | Species | Taxom |
| Eupterotidae Swinhoe, 1892 | Giant Lappet Moths | 9 | Species | Taxom |
| Eurybrachidae Stål, 1862 | | 5 | Species | Taxom |
| Eurytomidae Walker, 1832 | Eurytomid wasps | 4 | Species | Taxom |
| Euteliidae Grote, 1882 | Euteliid Moths | 3 | Species | Taxom |
| Euthyplociidae Lestage, 1921 | | 1 | Species | Taxom |
| Evaniidae Latreille, 1802 | Ensign wasp | 1 | Species | Taxom |
| Figitidae Thomson, 1862 | Figitid wasps | 1 | Species | Taxom |
| Flatidae Spinola, 1839 | Flatid planthoppers | 11 | Species | Taxom |
| Forficulidae Stephens, 1829 | Common Earwig | 0 | Species | Taxom |
| Formicidae Latreille, 1809 | Ant | 709 | Species | Taxom |
| Fulgoridae Latreille, 1807 | Fulgorid Planthopper | 37 | Species | Taxom |
| Gasteruptiidae Ashmead, 1900 | Carrot Wasps | 1 | Species | Taxom |
| Gelastocoridae Kirkaldy, 1897 | Toad bug | 0 | Species | Taxom |
| Gelechiidae Stainton, 1854 | Gelechiid moths | 25 | Species | Taxom |
| Geocoridae Baerensprung, 1860 | Big-eyed Bugs | 3 | Species | Taxom |
| Geometridae Leach, 1815 | Cankerworm moths | 343 | Species | Taxom |
| Geotrupidae Latreille, 1802 | Dor beetles | 8 | Species | Taxom |
| Gerridae Leach, 1815 | Jesus bugs | 3 | Species | Taxom |
| Glaphyridae MacLeay, 1819 | Bumble bee scarab beetle | 1 | Species | Taxom |
| Glossosomatidae Wallengren, 1891 | Little Black Caddisflies | 17 | Species | Taxom |
| Goeridae Ulmer, 1903 | | 19 | Species | Taxom |
| Gomphidae Rambur, 1842 | Club-tailed dragonflies | 47 | Species | Taxom |
| Gracillariidae Stainton, 1854 | Blotch leaf miner moths | 39 | Species | Taxom |
| Gryllacrididae Blanchard, 1845 | Camel Crickets | 37 | Species | Taxom |
| Gryllidae Bolivar, 1878 | Crickets | 76 | Species | Taxom |
| Gryllotalpidae Saussure, 1870 | Mole cricket | 4 | Species | Taxom |
| Gyrinidae Latreille, 1802 | Whirligig beetle | 7 | Species | Taxom |
| Haematopinidae Enderlein, 1904 | Ungulate lice | 1 | Species | Taxom |
| Halictidae Thomson, 1869 | Flower bees | 19 | Species | Taxom |
| Halictophagidae Perkins, 1905 | | 5 | Species | Taxom |
| Haliplidae Aubé, 1836 | Crawling Water Beetle | 1 | Species | Taxom |
| Hebridae Amyot and Se..., 1843 | Velvet water bug | 1 | Species | Taxom |
| Heleomyzidae (Westwood, 1840) | Heleomyzid flies | 1 | Species | Taxom |
| Heliconiidae (Swainson, 1822) | Heliconians | 1 | Species | Taxom |
| Helicopsychidae Ulmer, 1912 | Snail Case caddisflies | 10 | Species | Taxom |
| Hemerobiidae Latreille, 1802 | Brown Lacewing | 3 | Species | Taxom |
| Hemipsocidae Pearman, 1936 | Leaf Litter Barklice | 2 | Species | Taxom |
| Heptageniidae Needham, 1901 | Flat-Bodied Up-Wings Heptageniidae | 3 | Species | Taxom |
| Hesperiidae Latreille, 1809 | Indet. Skipper | 415 | Species | Taxom |
| Heteroceridae MacLeay, 1825 | Mud beetles | 15 | Species | Taxom |
| Heterogastridae Stål, 1872 | | 6 | Species | Taxom |
| Heteronemiidae Rehn, J. A. G., 1904 | | 1 | Species | Taxom |
| Heteropterygidae Kirby, 1896 | | 5 | Species | Taxom |
| Hippoboscidae Samouelle, 1819 | Keds | 28 | Species | Taxom |
| Histeridae Gyllenhal, 1808 | Clown beetle | 130 | Species | Taxom |
| Homotomidae Heslop-Harrison, 1958 | | 2 | Species | Taxom |
| Hoplopleuridae Ewing, 1929 | | 8 | Species | Taxom |
| Hyblaeidae Hampson, 1903 | Teak Moths | 3 | Species | Taxom |
| Hybosoridae Erichson, 1847 | Pill scarab beetles | 14 | Species | Taxom |
| Hybotidae Meigen, 1820 | Dance flies | 39 | Species | Taxom |
| Hydraenidae Mulsant, 1844 | Cascade Beetles | 5 | Species | Taxom |
| Hydrobiosidae Ulmer, 1905 | | 39 | Species | Taxom |
| Hydrometridae Billberg, 1820 | Marsh treader | 0 | Species | Taxom |
| Hydrophilidae Latreille, 1802 | Silver Water Beetles | 129 | Species | Taxom |
| Hydropsychidae Curtis, 1835 | Net Spinning caddisflies | 86 | Species | Taxom |
| Hydroptilidae Stephens, 1836 | Micro caddisflies | 172 | Species | Taxom |
| Hymenopodidae Giglio-Tos, 1919 | Flower mimic mantises | 19 | Species | Taxom |
| Hypsipterygidae Drake, 1961 | | 1 | Species | Taxom |
| Hystrichopsyllidae Tiraboschi, 1904 | Insectivore fleas | 1 | Species | Taxom |
| Ichneumonidae Latreille, 1802 | Ichneumon flies | 17 | Species | Taxom |
| Indotermitidae (Roonwal, 1958) | | 2 | Species | Taxom |
| Iridopterygidae Giglio-Tos, 1919 | | 2 | Species | Taxom |
| Ischnopsyllidae Wahlgren, 1907 | Bat fleas | 4 | Species | Taxom |
| Isostictidae Fraser, 1955 | Narrow-wings | 1 | Species | Taxom |
| Issidae Spinola, 1839 | Issid planthoppers | 5 | Species | Taxom |
| Ithonidae Newman, 1838 | Ithonid lacewings | 1 | Species | Taxom |
| Kalotermitidae Froggatt, 1897 | Dampwood termites | 9 | Species | Taxom |
| Kermesidae Signoret, 1875 | Gall-like Scale Insects | 1 | Species | Taxom |
| Keroplatidae Rondani, 1856 | Fungus gnats | 10 | Species | Taxom |
| Kinnaridae Muir, 1925 | Kinnarid Planthoppers | 2 | Species | Taxom |
| Labiduridae Verhoeff, 1902 | Long-horned earwig | 3 | Species | Taxom |
| Labiidae (Burr, 1909) | Little earwig | 0 | Species | Taxom |
| Lampyridae Latreille, 1817 | Fireflies | 14 | Species | Taxom |
| Largidae Amyot and Se..., 1843 | Bordered plant bugs | 8 | Species | Taxom |
| Lasiocampidae Harris, 1841 | Eggar Moths | 24 | Species | Taxom |
| Latridiidae Erichson, 1842 | Minute brown scavenger beetle | 12 | Species | Taxom |
| Lauxaniidae Macquart, 1835 | Beach flies | 7 | Species | Taxom |
| Lecanodiaspididae Borchsenius, 1965 | False pit scales | 1 | Species | Taxom |
| Lecithoceridae Le Marchand, 1947 | Long-horned moths | 15 | Species | Taxom |
| Leiodidae Fleming, 1821 | Round fungus beetles | 45 | Species | Taxom |
| Lepidopsocidae Lienhard & S..., 2002 | Scaly-winged bark louse | 0 | Species | Taxom |
| Lepidostomatidae Ulmer, 1903 | Bizarre Caddisflies | 40 | Species | Taxom |
| Leptoceridae Leach, 1815 | Long Horned caddisflies | 193 | Species | Taxom |
| Leptophlebiidae Banks, 1900 | Leptophlebiids | 1 | Species | Taxom |
| Lestidae Calvert, 1901 | Spread-winged damselflies | 17 | Species | Taxom |
| Leucospidae Fabricius, 1775 | Leucospid wasps | 1 | Species | Taxom |
| Leuctridae Klapálek, 1905 | Needle Or Willow Stoneflies | 4 | Species | Taxom |
| Libellulidae Rambur, 1842 | Chasers | 82 | Species | Taxom |
| Limacodidae Duponchel, 1845 | Cup moths | 32 | Species | Taxom |
| Limnephilidae Kolenati, 1848 | Northern caddisflies | 1 | Species | Taxom |
| Limnichidae Erichson, 1846 | Minute marsh loving beetle | 6 | Species | Taxom |
| Limnocentropodidae Tsuda, 1942 | | 7 | Species | Taxom |
| Limoniidae (Speiser, 1909) | Craneflies | 13 | Species | Taxom |
| Liposcelididae Enderlein, 1911 | Booklice | 2 | Species | Taxom |
| Liturgusidae Giglio-Tos, 1919 | | 4 | Species | Taxom |
| Liviidae Low, 1879 | | 3 | Species | Taxom |
| Lonchaeidae Loew, 1861 | Lance Flies | 8 | Species | Taxom |
| Lonchodidae | | 1 | Species | Taxom |
| Lophopidae Stål, 1866 | | 9 | Species | Taxom |
| Lucanidae Latreille, 1804 | Stag Beetle | 239 | Species | Taxom |
| Lycaenidae Leach, 1815 | And blues | 570 | Species | Taxom |
| Lycidae Laporte, 1836 | Lycid beetles | 13 | Species | Taxom |
| Lygaeidae Schilling, 1829 | Chinch bugs | 16 | Species | Taxom |
| Lygistorrhinidae Hendel, 1936 | Long beaked fungus gnat | 1 | Species | Taxom |
| Lymexylidae Fleming, 1821 | Ship-timber beetle | 1 | Species | Taxom |
| Machaerotidae Stål, 1866 | Tube spittlebugs | 7 | Species | Taxom |
| Malcidae Stål, 1865 | | 2 | Species | Taxom |
| Mantidae Burmeister, 1838 | Mantids | 57 | Species | Taxom |
| Mantispidae Leach, 1815 | Mantid lacewings | 4 | Species | Taxom |
| Megachilidae Schenk, 1860 | And Resin Bees | 41 | Species | Taxom |
| Megalopodidae Latreille, 1802 | Megalopodid Leaf Beetles | 4 | Species | Taxom |
| Megapodagrionidae Tillyard, 1917 | Flatwing | 6 | Species | Taxom |
| Melandryidae Leach, 1815 | False Darkling Beetle | 1 | Species | Taxom |
| Melittidae Schenk, 1860 | Melittid bees | 1 | Species | Taxom |
| Meloidae Gyllenhal, 1810 | Blister Beetle | 12 | Species | Taxom |
| Melolonthidae (Leach, 1817) | Chafers | 3 | Species | Taxom |
| Melyridae Leach, 1815 | Malachite Beetles | 3 | Species | Taxom |
| Membracidae Germar, 1821 | Horned Treehoppers | 13 | Species | Taxom |
| Menoponidae Mjöberg, 1910 | Bird lice | 42 | Species | Taxom |
| Mesoveliidae Douglas and ..., 1867 | Pond treaders | 2 | Species | Taxom |
| Metallyticidae Handlirsch, 1925 | | 3 | Species | Taxom |
| Micronectidae Jaczewski, 1924 | Pygmy water boatmen | 5 | Species | Taxom |
| Micronoctuidae Fibiger, 2005 | | 8 | Species | Taxom |
| Micropezidae Illiger, 1798 | Stilt Flies | 5 | Species | Taxom |
| Milichiidae Schiner, 1862 | Filth flies | 5 | Species | Taxom |
| Millieriidae (Stainton, 1854) | | 1 | Species | Taxom |
| Miridae Hahn, 1831 | Capsid bugs | 68 | Species | Taxom |
| Mirinidae (Kozlov, 1985) | | 1 | Species | Taxom |
| Mogoplistidae Saussure, 1877 | Scaly cricket | 26 | Species | Taxom |
| Molannidae Wallengren, 1891 | Hood Casemaker Caddisflies | 5 | Species | Taxom |
| Monophlebidae Signoret, 1875 | Giant scale | 8 | Species | Taxom |
| Monotomidae Laporte, 1840 | Minute Clubbed Beetles | 0 | Species | Taxom |
| Mordellidae Latreille, 1802 | Pintail beetles | 13 | Species | Taxom |
| Muscidae Latreille, 1802 | Face flies | 53 | Species | Taxom |
| Mutillidae André, 1907 | Cow ant | 49 | Species | Taxom |
| Mycetophilidae Newman, 1834 | Fungus Gnat | 57 | Species | Taxom |
| Mydidae Bezzi, 1903 | Mydas flies | 1 | Species | Taxom |
| Mymaridae Haliday, 1833 | Fairflies | 5 | Species | Taxom |
| Myopsocidae Enderlein, 1907 | Mouse like barklouse | 1 | Species | Taxom |
| Myrmecolacidae Saunders, 1872 | | 2 | Species | Taxom |
| Myrmecophilidae Saussure, 1874 | Ant cricket | 2 | Species | Taxom |
| Myrmeleontidae Latreille, 1802 | Ant lions | 3 | Species | Taxom |
| Myrmosidae Fox, 1894 | Myrmosid Wasps | 1 | Species | Taxom |
| Nabidae Costa, 1852 | Damsel bugs | 1 | Species | Taxom |
| Naucoridae Leach, 1815 | Creeping water bug | 8 | Species | Taxom |
| Nemestrinidae Macquart, 1834 | Tangle-veined flies | 4 | Species | Taxom |
| Nemonychidae Bedel, 1882 | Nemonychid weevils | 1 | Species | Taxom |
| Nemouridae Newman, 1853 | Brown stoneflies | 17 | Species | Taxom |
| Nepidae Latreille, 1802 | Back-swimmer Water-boatmen | 10 | Species | Taxom |
| Nepticulidae Stainton, 1854 | Leaf miners | 1 | Species | Taxom |
| Neriidae Hendel, 1916 | Banana stalk flies | 3 | Species | Taxom |
| Nitidulidae Latreille, 1802 | Nitidules | 13 | Species | Taxom |
| Nocticolinae | | 3 | Species | Taxom |
| Noctuidae Latreille, 1809 | Armyworms | 155 | Species | Taxom |
| Nogodinidae Melichar, 1898 | | 2 | Species | Taxom |
| Nolidae Hampson, 1894 | Hatted Caterpillars | 56 | Species | Taxom |
| Nosodendridae Erichson, 1846 | Nosodendrid beetles | 5 | Species | Taxom |
| Noteridae C. G. Thomson, 1860 | Burrowing water beetle | 3 | Species | Taxom |
| Notodontidae Stephens, 1829 | Bag Shelter Moths | 74 | Species | Taxom |
| Notoligotomidae Davis, 1940 | | 4 | Species | Taxom |
| Notonectidae Latreille, 1802 | Back Swimmers | 3 | Species | Taxom |
| Nycteribiidae Samouelle, 1819 | Bat Flies | 7 | Species | Taxom |
| Nymphalidae Rafinesque, 1815 | Admirals | 622 | Species | Taxom |
| Ochodaeidae Mulsant & Rey, 1870 | Sand-loving scarab beetle | 6 | Species | Taxom |
| Odiniidae Hendel, 1920 | Odiniid flies | 1 | Species | Taxom |
| Odontoceridae Wallengren, 1891 | Mortarjoint Casemaker Caddisflies | 13 | Species | Taxom |
| Oecanthidae (Blanchard, 1845) | Tree cricket | 3 | Species | Taxom |
| Oecophoridae Bruand, 1851 | Concealer Moths | 5 | Species | Taxom |
| Oedemeridae Latreille, 1810 | False Blister Beetle | 10 | Species | Taxom |
| Oestridae Leach, 1815 | Bot flies | 1 | Species | Taxom |
| Oligotomidae Enderlein, 1909 | | 8 | Species | Taxom |
| Ormyridae Förster, 1856 | Armyrids | 1 | Species | Taxom |
| Ortheziidae Green, 1896 | Ensign coccids | 2 | Species | Taxom |
| Oxycarenidae Stål, 1862 | | 1 | Species | Taxom |
| Oxypeltidae Lacordaire, 1869 | | 1 | Species | Taxom |
| Pachygronthidae Stål, 1865 | | 1 | Species | Taxom |
| Pachytroctidae Enderlein, 1911 | Thick Barklice | 1 | Species | Taxom |
| Palaeosetidae Turner, 1922 | Miniature Ghost Moths | 1 | Species | Taxom |
| Pamphiliidae Cameron, 1890 | Leaf-rolling sawflies | 0 | Species | Taxom |
| Panorpidae Linnaeus, 1758 | Common scorpionflies | 12 | Species | Taxom |
| Papilionidae Latreille, 1802 | Apollos | 128 | Species | Taxom |
| Passalidae Leach, 1815 | Bess beetle | 26 | Species | Taxom |
| Pediculidae Leach, 1817 | | 1 | Species | Taxom |
| Peltoperlidae Claassen, 1931 | Roach stoneflies | 7 | Species | Taxom |
| Pentatomidae Leach, 1815 | Lesser shield bugs | 25 | Species | Taxom |
| Perilampidae Latreille, 1809 | Perilampid waps | 1 | Species | Taxom |
| Peripsocidae Roesler, 1944 | Stout Barklice | 1 | Species | Taxom |
| Periscelididae Oldenberg, 1914 | Periscelidid Flies | 6 | Species | Taxom |
| Perlidae (Latreille, 1802) | Common stoneflies | 37 | Species | Taxom |
| Perlodidae Klapálek, 1912 | Perlodid stoneflies | 1 | Species | Taxom |
| Personidae Gray, 1854 | | 2 | Species | Taxom |
| Phacopteronidae Heslop-Harrison, 1958 | | 2 | Species | Taxom |
| Phalangopsidae (Chopard, 1949) | Spider cricket | 2 | Species | Taxom |
| Phasmatidae Roberts, 1944 | Walking sticks | 32 | Species | Taxom |
| Philopotamidae Stephens, 1829 | Finger Net caddisflies | 82 | Species | Taxom |
| Philopteridae Burmeister, 1830 | | 57 | Species | Taxom |
| Phlaeothripidae Uzel, 1895 | Thrips | 60 | Species | Taxom |
| Phoridae Curtis, 1833 | Coffin Flies | 52 | Species | Taxom |
| Phylliidae Redtenbacher, 1906 | Leaf insects | 8 | Species | Taxom |
| Pieridae Duponchel, 1835 | And Sulphurs | 110 | Species | Taxom |
| Pipunculidae Walker, 1834 | Big headed flies | 17 | Species | Taxom |
| Plataspidae (Dallas, 1851) | | 1 | Species | Taxom |
| Plataspididae (Dallas, 1851) | | 0 | Species | Taxom |
| Platycnemididae Tillyard, 1917 | White-legged damselflies | 26 | Species | Taxom |
| Platygastridae Haliday, 1833 | Platygastrid wasps | 0 | Species | Taxom |
| Platystictidae Laidlaw, 1924 | Forest Damselflies | 8 | Species | Taxom |
| Platystomatidae Schiner, 1862 | Picture-winged flies | 6 | Species | Taxom |
| Pleidae Fieber, 1817 | Pigmy backswimmers | 3 | Species | Taxom |
| Pleocomidae LeConte, 1861 | Rain beetle | 1 | Species | Taxom |
| Plokiophilidae China, 1953 | Spider web bug | 1 | Species | Taxom |
| Plutellidae Guenée, 1845 | Diamond-back moths | 3 | Species | Taxom |
| Podoscirtidae Saussure, 1878 | | 37 | Species | Taxom |
| Polycentropodidae Ulmer, 1903 | Tube Maker Caddisflies | 73 | Species | Taxom |
| Polyplacidae Fahrenholz, 1912 | Spiny rat lice | 8 | Species | Taxom |
| Pompilidae Latreille, 1805 | Pompilid wasps | 8 | Species | Taxom |
| Potamanthidae Albarda, 1888 | Hacklegill mayflies | 1 | Species | Taxom |
| Prionoglarididae Badonnel, 1951 | Large-winged Psocids | 2 | Species | Taxom |
| Prisopodidae Brunner von ..., 1893 | | 2 | Species | Taxom |
| Procercopidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Proctotrupidae Latreille, 1802 | Proctotrupid wasps | 1 | Species | Taxom |
| Prostomidae C. G. Thomson, 1859 | Jugular-horned beetle | 1 | Species | Taxom |
| Protoneuridae Tillyard, 1917 | Bambootails | 7 | Species | Taxom |
| Psephenidae Lacordaire, 1854 | Water pennies | 14 | Species | Taxom |
| Pseudocaeciliidae Pearman, 1936 | False Lizard Barklice | 2 | Species | Taxom |
| Pseudococcidae Heymons, 1915 | Mealy Bugs | 43 | Species | Taxom |
| Pseudophyllodromiidae Hebard, 1929 | | 11 | Species | Taxom |
| Pseudostigmatidae Tillyard, 1917 | Forest giants | 1 | Species | Taxom |
| Psilidae Macquart, 1835 | Carrot flies | 2 | Species | Taxom |
| Psocidae Samouelle, 1819 | Common bark louse | 8 | Species | Taxom |
| Psychidae Boisduval, 1828 | Bagmoths | 5 | Species | Taxom |
| Psychodidae Newman, 1834 | Drain flies | 43 | Species | Taxom |
| Psychomyiidae Walker, 1852 | Net Tube Caddisflies | 42 | Species | Taxom |
| Psyllidae Latreille, 1807 | Jumping plant lice | 7 | Species | Taxom |
| Psyllipsocidae Enderlein, 1903 | Cave Barklice | 1 | Species | Taxom |
| Pteromalidae Dalman, 1820 | Pteromalid wasps | 9 | Species | Taxom |
| Pterophoridae Zeller, 1841 | Plume Moths | 45 | Species | Taxom |
| Pteroplistidae (Chopard, 1936) | | 1 | Species | Taxom |
| Ptiliidae Heer, 1843 | Feather-wing beetles | 3 | Species | Taxom |
| Ptinidae Latreille, 1802 | Death-watch and Spider Beetles | 7 | Species | Taxom |
| Ptychopteridae Osten Sacken, 1862 | Phantom crane flies | 2 | Species | Taxom |
| Pulicidae Billberg, 1820 | Cat fleas | 2 | Species | Taxom |
| Pygiopsyllidae Wagner, 1939 | | 1 | Species | Taxom |
| Pyralidae Latreille, 1802 | Flour Moths | 19 | Species | Taxom |
| Pyrgomorphidae Brunner von ..., 1874 | Bushlocusts | 8 | Species | Taxom |
| Pyrgotidae Schiner, 1868 | Light Flies | 3 | Species | Taxom |
| Pyrrhocoridae Dohrn, 1859 | Cotton stainers | 7 | Species | Taxom |
| Qinococcidae Wu, 2022 | | 1 | Species | Taxom |
| Rangomaramidae Jaschhof & D..., 2002 | | 3 | Species | Taxom |
| Reduviidae Latreille, 1807 | Assassin and thread-legged bugs | 32 | Species | Taxom |
| Rhaphidophoridae Walker, 1869 | And Cave Weta | 13 | Species | Taxom |
| Rhinotermitidae Froggatt, 1897 | Subterranean termites | 11 | Species | Taxom |
| Rhizoecidae Williams, 1969 | | 3 | Species | Taxom |
| Rhopalidae Amyot & Serv..., 1843 | Rhopalid Bugs | 4 | Species | Taxom |
| Rhopalosomatidae Ashmead, 1896 | Rhopalosomatid wasps | 2 | Species | Taxom |
| Rhyacophilidae Stephens, 1836 | Free-living Caddisflies | 1 | Species | Taxom |
| Rhynchitidae Gistel, 1848 | Leaf-rolling weevils | 3 | Species | Taxom |
| Rhyparochromidae Amyot & Serv..., 1843 | Dirt-colored Seed Bugs | 25 | Species | Taxom |
| Ricaniidae Amyot & Audi..., 1843 | | 13 | Species | Taxom |
| Riodinidae Grote, 1895 | Metalmark Butterflies | 39 | Species | Taxom |
| Rutelidae (MacLeay, 1819) | | 10 | Species | Taxom |
| Salpingidae Leach, 1815 | Narrow-waisted bark beetle | 0 | Species | Taxom |
| Sarcophagidae Macquart, 1834 | Flesh flies | 38 | Species | Taxom |
| Saturniidae Boisduval, 1837 | And Giant Silk Moths | 32 | Species | Taxom |
| Scarabaeidae Latreille, 1802 | Dung beetles | 1283 | Species | Taxom |
| Scathophagidae Robineau-Des..., 1830 | Dung flies | 1 | Species | Taxom |
| Scatopsidae Newman, 1834 | Dung midges | 2 | Species | Taxom |
| Scelionidae Haliday, 1839 | Scelionid wasps | 73 | Species | Taxom |
| Scenopinidae Burmeister, 1835 | Window Flies | 4 | Species | Taxom |
| Sciaridae Billberg, 1820 | Black fungus gnats | 8 | Species | Taxom |
| Sciomyzidae Fallen, 1820 | Marsh Flies | 4 | Species | Taxom |
| Scirtidae Fleming, 1821 | Marsh Beetle | 12 | Species | Taxom |
| Scoliidae Leach, 1815 | Mammoth wasps | 1 | Species | Taxom |
| Scutelleridae Leach, 1815 | Jewel bugs | 7 | Species | Taxom |
| Scydmaenidae (Leach, 1815) | Ant-like stone beetles | 107 | Species | Taxom |
| Scythrididae Rebel, 1901 | Flower Moths | 1 | Species | Taxom |
| Sepsidae Walker, 1833 | Black scavenger flies | 4 | Species | Taxom |
| Sesiidae Boisduval, 1828 | Clear Wings | 14 | Species | Taxom |
| Signiphoridae Howard, 1894 | Signiphorid waps | 2 | Species | Taxom |
| Silphidae Latreille, 1807 | Burying And Carrion Beetles | 6 | Species | Taxom |
| Silvanidae Kirby, 1837 | Flat bark beetles | 8 | Species | Taxom |
| Simuliidae Newman, 1834 | Black flies | 64 | Species | Taxom |
| Sphaeroceridae Macquart, 1835 | Dung flies | 16 | Species | Taxom |
| Sphecidae Latreille, 1802 | Digger & Sand wasps | 7 | Species | Taxom |
| Sphingidae Latreille, 1802 | Hawk Moths | 224 | Species | Taxom |
| Spongiphoridae Verhoeff, 1902 | Little Earwigs | 2 | Species | Taxom |
| Staphylinidae Lameere, 1900 | Rove beetles | 1173 | Species | Taxom |
| Stenopsychidae Martynov, 1924 | | 3 | Species | Taxom |
| Stivaliidae Mardon, 1978 | | 3 | Species | Taxom |
| Stratiomyidae Latreille, 1802 | Soldier flies | 30 | Species | Taxom |
| Streblidae (Kolenati, 1863) | Bat flies | 4 | Species | Taxom |
| Strongylophthalmyiidae Hennig, 1940 | Strongylophthalmyiid flies | 12 | Species | Taxom |
| Stylopidae Kirby, 1813 | Strepsiptera | 1 | Species | Taxom |
| Syrphidae Latreille, 1802 | Drone flies | 36 | Species | Taxom |
| Tabanidae Latreille, 1802 | Breeze flies | 117 | Species | Taxom |
| Tachardiidae Green, 1896 | Lac insects | 2 | Species | Taxom |
| Tachinidae (Robineau-Des..., 1830) | Bristle Flies | 52 | Species | Taxom |
| Tarachodidae Handlirsch, 1930 | | 0 | Species | Taxom |
| Tenebrionidae Latreille, 1802 | Darkling Beetle | 95 | Species | Taxom |
| Tenthredinidae Latreille, 1804 | Common sawflies | 11 | Species | Taxom |
| Tephritidae Newman, 1834 | Fruit flies | 177 | Species | Taxom |
| Teratembiidae Krauss, 1911 | | 1 | Species | Taxom |
| Termitidae Latreille, 1802 | Higher termites | 77 | Species | Taxom |
| Tessaratomidae Stål, 1864 | Giant shield bug | 7 | Species | Taxom |
| Tetratomidae Billberg, 1820 | Polypore fungus beetle | 1 | Species | Taxom |
| Tetrigidae Rambur, 1838 | Groundhoppers | 58 | Species | Taxom |
| Tettigometridae Germar, 1821 | | 1 | Species | Taxom |
| Tettigoniidae Krauss, 1902 | Bush crickets | 182 | Species | Taxom |
| Thaumaleidae Bezzi, 1913 | Solitary midges | 1 | Species | Taxom |
| Thaumastocoridae Kirkaldy, 1908 | Palm bug | 1 | Species | Taxom |
| Therevidae Newman, 1834 | Stiletto flies | 4 | Species | Taxom |
| Thespidae Giglio-Tos, 1919 | | 1 | Species | Taxom |
| Thripidae Stevens, 1829 | Common thrips | 42 | Species | Taxom |
| Thyrididae Herrich-Schä..., 1846 | Picture Winged Leaf Moths | 7 | Species | Taxom |
| Tineidae Latreille, 1810 | & Allies | 12 | Species | Taxom |
| Tingidae Laporte, 1832 | Lace bug | 50 | Species | Taxom |
| Tiphiidae Leach, 1815 | Flower wasps | 1 | Species | Taxom |
| Tipulidae Latreille, 1802 | Crane Flies | 115 | Species | Taxom |
| Tortricidae Latreille, 1803 | Bell Moths | 139 | Species | Taxom |
| Torymidae Walker, 1833 | Apple seed chalcids | 2 | Species | Taxom |
| Toxoderidae Giglio-Tos, 1919 | | 6 | Species | Taxom |
| Trachypachidae C. G. Thomson, 1857 | False ground beetle | 1 | Species | Taxom |
| Trichodectidae Kellogg, 1896 | | 2 | Species | Taxom |
| Tricorythidae Lestage, 1942 | Little stout crawler mayflies | 1 | Species | Taxom |
| Trictenotomidae Blanchard, 1845 | Croc beetles | 7 | Species | Taxom |
| Tridactylidae Saussure, 1874 | Pygmy mole cricket | 1 | Species | Taxom |
| Trigonidiidae (Saussure, 1870) | And Ground Crickets | 16 | Species | Taxom |
| Trigonopterygidae Walker, 1870 | | 1 | Species | Taxom |
| Triozidae Löw, 1879 | Jumping plant lice | 2 | Species | Taxom |
| Troctopsocidae Mockford, 1967 | | 5 | Species | Taxom |
| Trogidae (MacLeay, 1819) | Gnawer beetles | 16 | Species | Taxom |
| Trogossitidae Latreille, 1802 | Bark gnawing beetle | 3 | Species | Taxom |
| Tropiduchidae Stål, 1866 | Tropiduchid Planthoppers | 4 | Species | Taxom |
| Uraniidae Blanchard, 1845 | Swallowtail Moths | 12 | Species | Taxom |
| Urostylidae (Dallas, 1851) | | 0 | Species | Taxom |
| Veliidae Amyot & Serv..., 1843 | Broad-shouldered bugs | 3 | Species | Taxom |
| Vermileonidae Williston, 1886 | Wormlion | 1 | Species | Taxom |
| Vesperidae Mulsant, 1839 | Vesperid longicorn beetles | 2 | Species | Taxom |
| Vespidae Leach, 1815 | And Allies | 91 | Species | Taxom |
| Xiphocentronidae Schmid, 1982 | | 13 | Species | Taxom |
| Xiphydriidae Leach, 1819 | Wood wasps | 0 | Species | Taxom |
| Xylomyidae Verrall, 1901 | Wood soldier flies | 1 | Species | Taxom |
| Xylophagidae Fallen, 1810 | Awl-flies | 3 | Species | Taxom |
| Yponomeutidae Stephens, 1829 | Ermine Moths | 4 | Species | Taxom |
| Zopheridae Solier, 1834 | Cylindrical bark beetles | 5 | Species | Taxom |
| Zygaenidae Latreille, 1809 | Burnet Forester | 24 | Species | Taxom |
