| Acanthocnemidae Crowson, 1964 | | 9 | Species | Taxom |
| Acanthosomatidae Signoret, 1864 | Acanthosomatids | 16 | Species | Taxom |
| Achilidae Stål, 1866 | Achilid Planthoppers | 2 | Species | Taxom |
| Acrididae MacLeay, 1819 | Grasshoppers and locusts | 2 | Species | Taxom |
| Adelidae Bruand, 1851 | Adelid Moths | 6 | Species | Taxom |
| Aderidae Winkler, 1927 | Ant-like leaf beetles | 145 | Species | Taxom |
| Agromyzidae Fallen, 1823 | Leaf miner flies | 34 | Species | Taxom |
| Agyrtidae Thomson, 1859 | Primitive carrion beetles | 70 | Species | Taxom |
| Aleyrodidae Westwood, 1840 | Whiteflies | 22 | Species | Taxom |
| Alucitidae Leach, 1815 | Many Plumed Moths | 3 | Species | Taxom |
| Amphizoidae LeConte, 1853 | Stout-stream beetles | 4 | Species | Taxom |
| Andrenidae Webster, 1913 | Andrenid bees | 762 | Species | Taxom |
| Anisopodidae Knab, 1912 | Window Midges | 0 | Species | Taxom |
| Anthicidae Latreille, 1819 | Ant beetles | 1654 | Species | Taxom |
| Anthocoridae Fieber, 1837 | Flower bugs | 42 | Species | Taxom |
| Anthomyiidae Robineau-Des..., 1830 | Anthomyiid flies | 6 | Species | Taxom |
| Anthomyzidae Czerny, 1903 | Anthomyzid flies | 1 | Species | Taxom |
| Anthribidae Billberg, 1820 | Fungus Weevil | 654 | Species | Taxom |
| Apataniidae Wallengren, 1886 | Early Smoky Wing Sedges | 116 | Species | Taxom |
| Aphalaridae Löw, 1879 | | 4 | Species | Taxom |
| Aphelinidae Thomson, 1876 | Aphelinid wasps | 6 | Species | Taxom |
| Aphididae Latreille, 1802 | Aphid | 1 | Species | Taxom |
| Aphodiidae Leach, 1815 | | 14 | Species | Taxom |
| Apidae Latreille, 1802 | Bumble bees | 896 | Species | Taxom |
| Aradidae Spinola, 1837 | Flat bug | 9 | Species | Taxom |
| Archeocrypticidae Kaszab, 1964 | Ancient Fungus Beetles | 9 | Species | Taxom |
| Archotermopsidae Engel, Grima..., 2009 | Rottenwood Termites | 3 | Species | Taxom |
| Argidae Konow, 1890 | Argid flies | 1 | Species | Taxom |
| Artematopodidae Lacordaire, 1857 | Soft bodied plant beetle | 8 | Species | Taxom |
| Artheneidae Stål, 1872 | | 7 | Species | Taxom |
| Asilidae Latreille, 1802 | Assassin flies | 1643 | Species | Taxom |
| Attelabidae Billberg, 1820 | Leaf Rolling Weevil | 1303 | Species | Taxom |
| Autostichidae Le Marchand, 1947 | Autostichid Moths | 4 | Species | Taxom |
| Batrachedridae Heinemann & ..., 1876 | Batrachedrid Moths | 1 | Species | Taxom |
| Bedelliidae (Stainton, 1849) | | 6 | Species | Taxom |
| Belidae Schönherr, 1826 | Belid Beetle | 2 | Species | Taxom |
| Beraeidae Wallengren, 1891 | Small eastern caddisflies | 51 | Species | Taxom |
| Berytidae Fieber, 1851 | Stilt bug | 12 | Species | Taxom |
| Bibionidae Fleming, 1821 | Bibionid flies | 5 | Species | Taxom |
| Biphyllidae LeConte, 1861 | Biphyllid beetles | 31 | Species | Taxom |
| Blissidae Stål, 1862 | Chinch Bugs | 4 | Species | Taxom |
| Bolboceratidae (Mulsant, 1842) | Dor beetle | 1 | Species | Taxom |
| Bombycidae Latreille, 1802 | Lappet moths | 1 | Species | Taxom |
| Bombyliidae Latreille, 1802 | Bee Flies | 61 | Species | Taxom |
| Boridae C. G. Thomson, 1859 | Borids | 7 | Species | Taxom |
| Bostrichidae Latreille, 1802 | Auger beetles | 307 | Species | Taxom |
| Bothrideridae Erichson, 1845 | Cocoon-forming beetles | 27 | Species | Taxom |
| Brachycentridae Ulmer, 1903 | Humpless Casemaker Caddisflies | 16 | Species | Taxom |
| Brachypteridae (Erichson, 1845) | Short-winged Flower Beetles | 127 | Species | Taxom |
| Braconidae Latreille, 1829 | Braconid wasps | 39 | Species | Taxom |
| Brahmaeidae Swinhoe, 1892 | Brahmin Moths | 1 | Species | Taxom |
| Brentidae Billberg, 1820 | Brenthidae | 1621 | Species | Taxom |
| Buprestidae Leach, 1815 | Flat-headed wood-borers | 7595 | Species | Taxom |
| Byrrhidae Latreille, 1804 | Moss beetles | 498 | Species | Taxom |
| Byturidae Jacquelin du..., 1858 | Fruit worms | 28 | Species | Taxom |
| Calamoceratidae Ulmer, 1905 | | 10 | Species | Taxom |
| Caliscelidae Amyot & Serv..., 1843 | Piglet Bugs | 1 | Species | Taxom |
| Callidulidae Moore, 1877 | Old World Butterfly Moths | 2 | Species | Taxom |
| Calliphoridae Brauer & Ber..., 1889 | Blow flies | 7 | Species | Taxom |
| Callirhipidae Emden, 1924 | Callirhipid beetles | 20 | Species | Taxom |
| Calophyidae Vondracek, 1957 | | 1 | Species | Taxom |
| Canaceidae (Jones, 1906) | Beach flies | 0 | Species | Taxom |
| Cantharidae Imhoff, 1856 | Cantharids | 3260 | Species | Taxom |
| Capniidae Klapálek, 1905 | Capniid winter stoneflies | 16 | Species | Taxom |
| Carabidae Latreille, 1802 | Carabid beetles | 24740 | Species | Taxom |
| Carnidae Newman, 1834 | Bird flies | 3 | Species | Taxom |
| Carsidaridae Crawford, 1911 | | 1 | Species | Taxom |
| Castniidae Boisduval, 1828 | Castniid moths | 1 | Species | Taxom |
| Cecidomyiidae Newman, 1834 | Cecidomyidae | 4 | Species | Taxom |
| Cerambycidae Latreille, 1802 | Long Horn beetles | 10841 | Species | Taxom |
| Ceratocombidae Fieber, 1861 | | 2 | Species | Taxom |
| Ceratophyllidae Dampf, 1908 | Bird Fleas | 1 | Species | Taxom |
| Ceratopogonidae Newman, 1834 | Biting midge | 12 | Species | Taxom |
| Cerophytidae Latreille, 1834 | Cerophytid beetles | 2 | Species | Taxom |
| Cerylonidae Billberg, 1820 | Cerylid Kingfishers | 82 | Species | Taxom |
| Cetoniidae (Leach, 1815) | Flower beetles | 1 | Species | Taxom |
| Chalcididae Latreille, 1817 | Chalcidid wasps | 5 | Species | Taxom |
| Chamaemyiidae Hendel, 1910 | Aphid flies | 3 | Species | Taxom |
| Chelonariidae Blanchard, 1845 | Chelonarid beetles | 11 | Species | Taxom |
| Chironomidae Erichson, 1842 | Chironomids | 13 | Species | Taxom |
| Chloroperlidae Okamoto, 1912 | Green stoneflies | 5 | Species | Taxom |
| Chloropidae Schoenherr, 1840 | Chloropid flies | 1 | Species | Taxom |
| Choreutidae Stainton, 1854 | Choreuitid Moths | 4 | Species | Taxom |
| Chrysididae Latreille, 1802 | Chrysidid wasps | 0 | Species | Taxom |
| Chrysomelidae Latreille, 1802 | Casebearers | 13661 | Species | Taxom |
| Cicadellidae Latreille, 1802 | Cicadellids | 9 | Species | Taxom |
| Cicadidae Westwood, 1840 | Cicada | 2 | Species | Taxom |
| Ciidae Leach, 1819 | Minute tree fungus beetles | 259 | Species | Taxom |
| Cimicidae Latreille, 1802 | Bat bugs | 11 | Species | Taxom |
| Cixiidae Spinola, 1839 | Cixid planthoppers | 6 | Species | Taxom |
| Clambidae Fischer, 1821 | Fringe-winged beetles | 68 | Species | Taxom |
| Cleridae Latreille, 1802 | Checkered Beetle | 731 | Species | Taxom |
| Coccinellidae Latreille, 1807 | Coccinelles | 2875 | Species | Taxom |
| Coleophoridae Hübner, 1825 | Case moths | 36 | Species | Taxom |
| Colletidae Lepeletier, 1841 | Colletid bees | 271 | Species | Taxom |
| Conopidae Latreille, 1802 | Thick-headed Flies | 4 | Species | Taxom |
| Coreidae Leach, 1815 | Broad-headed bugs | 56 | Species | Taxom |
| Corixidae Leach, 1815 | Lesser Water-Boatman | 1 | Species | Taxom |
| Corylophidae LeConte, 1852 | Hooded beetles | 154 | Species | Taxom |
| Cosmopterigidae Heinemann & ..., 1876 | Cosmet Moths | 52 | Species | Taxom |
| Cossidae Leach, 1815 | Borers | 10 | Species | Taxom |
| Crabronidae Latreille, 1802 | Bee Wolves | 2 | Species | Taxom |
| Crambidae Latreille, 1810 | Crambid Snout Moths | 214 | Species | Taxom |
| Crowsoniellidae Iablokoff-Kh..., 1983 | Crowsoniella relicta | 1 | Species | Taxom |
| Cryptophagidae Kirby, 1937 | Mould beetles | 814 | Species | Taxom |
| Cucujidae Latreille, 1802 | Flat bark beetles | 231 | Species | Taxom |
| Culicidae Meigen, 1818 | Mosquito | 12 | Species | Taxom |
| Cupedidae Laporte, 1836 | Cupedids | 13 | Species | Taxom |
| Curculionidae Latreille, 1802 | Ambrosia beetles | 19684 | Species | Taxom |
| Cylindrotomidae (Mulsant, 1842) | Cylindrotomid Crane Flies | 1 | Species | Taxom |
| Cymidae Baerensprung, 1860 | | 3 | Species | Taxom |
| Dascillidae Guérin-Ménev..., 1843 | Orchid beetles | 52 | Species | Taxom |
| Decliniidae Nikitsky, La..., 1994 | Declinia relicta | 2 | Species | Taxom |
| Delphacidae Leach, 1815 | Delphacid planthoppers | 7 | Species | Taxom |
| Dermestidae Hope, 1840 | Carpet beetles | 943 | Species | Taxom |
| Derodontidae LeConte, 1861 | Tooth-neck fungus beetles | 19 | Species | Taxom |
| Dictyopharidae Spinola, 1839 | Dictyopharid Planthoppers | 36 | Species | Taxom |
| Dinidoridae Stål, 1867 | Dinidorid bug | 1 | Species | Taxom |
| Dipseudopsidae Ulmer, 1904 | | 8 | Species | Taxom |
| Dipsocoridae Dohrn, 1859 | Dipsocorids | 3 | Species | Taxom |
| Discolomatidae Horn, 1878 | | 39 | Species | Taxom |
| Dolichopodidae Latreille, 1809 | Long legged flies | 17 | Species | Taxom |
| Drepanidae Meyrick, 1895 | Drepanids | 123 | Species | Taxom |
| Dryinidae Haliday, 1840 | Dryinid wasps | 1 | Species | Taxom |
| Dryomyzidae Schiner, 1862 | Dryomyzid flies | 1 | Species | Taxom |
| Dryopidae Billberg, 1820 | Long toed water beetle | 109 | Species | Taxom |
| Dytiscidae Leach, 1815 | Diving beetles | 2025 | Species | Taxom |
| Echinophthiriidae Enderlein, 1904 | | 1 | Species | Taxom |
| Ecnomidae Ulmer, 1903 | | 28 | Species | Taxom |
| Elachistidae Bruand, 1851 | Elachistid moths | 28 | Species | Taxom |
| Elateridae Leach, 1815 | Click Beetle | 5617 | Species | Taxom |
| Elmidae Curtis, 1830 | Drive beetles | 346 | Species | Taxom |
| Empididae Latreille, 1809 | Balloon flies | 3 | Species | Taxom |
| Encyrtidae Walker, 1837 | Encyrtid wasps | 35 | Species | Taxom |
| Endomychidae Leach, 1815 | False Ladybirds | 450 | Species | Taxom |
| Endromidae Boisduval, 1828 | Glory Moths | 1 | Species | Taxom |
| Epermeniidae Spuler, 1910 | Epermeniid moths | 3 | Species | Taxom |
| Ephydridae Zetterstedt, 1837 | Brine flies | 2 | Species | Taxom |
| Epicopeiidae Swinhoe, 1892 | Oriental Swallowtail Moths | 4 | Species | Taxom |
| Erebidae Leach, 1815 | Erebid Moths | 347 | Species | Taxom |
| Eremazidae Iablokoff-Kh..., 1977 | | 2 | Species | Taxom |
| Eriocottidae Spuler, 1898 | Old World Spiny Winged Moths | 1 | Species | Taxom |
| Erotylidae Latreille, 1802 | Pleasing Fungus Beetle | 606 | Species | Taxom |
| Eucinetidae Lacordaire, 1857 | Plate-thigh beetle | 24 | Species | Taxom |
| Eucnemidae Eschscholtz, 1829 | Click Beetles | 210 | Species | Taxom |
| Eulichadidae Crowson, 1973 | Forest stream beetle | 14 | Species | Taxom |
| Eulophidae Westwood, 1829 | Eulophid wasps | 15 | Species | Taxom |
| Eupelmidae Walker, 1833 | Eupelmid wasps | 2 | Species | Taxom |
| Eupterotidae Swinhoe, 1892 | Giant Lappet Moths | 3 | Species | Taxom |
| Eurybrachidae Stål, 1862 | | 1 | Species | Taxom |
| Eurytomidae Walker, 1832 | Eurytomid wasps | 3 | Species | Taxom |
| Euteliidae Grote, 1882 | Euteliid Moths | 1 | Species | Taxom |
| Evaniidae Latreille, 1802 | Ensign wasp | 1 | Species | Taxom |
| Fanniidae Schnabl & Dz..., 1911 | Latrine flies | 3 | Species | Taxom |
| Figitidae Thomson, 1862 | Figitid wasps | 6 | Species | Taxom |
| Flatidae Spinola, 1839 | Flatid planthoppers | 20 | Species | Taxom |
| Forficulidae Stephens, 1829 | Common Earwig | 7 | Species | Taxom |
| Formicidae Latreille, 1809 | Ant | 2434 | Species | Taxom |
| Gelechiidae Stainton, 1854 | Gelechiid moths | 55 | Species | Taxom |
| Geocoridae Baerensprung, 1860 | Big-eyed Bugs | 21 | Species | Taxom |
| Geometridae Leach, 1815 | Cankerworm moths | 822 | Species | Taxom |
| Geotrupidae Latreille, 1802 | Dor beetles | 795 | Species | Taxom |
| Glaphyridae MacLeay, 1819 | Bumble bee scarab beetle | 252 | Species | Taxom |
| Glaresidae Kolbe, 1905 | Enigmatic scarab beetle | 31 | Species | Taxom |
| Glossosomatidae Wallengren, 1891 | Little Black Caddisflies | 139 | Species | Taxom |
| Glyphipterigidae Stainton, 1854 | Glyphipterigid moths | 17 | Species | Taxom |
| Goeridae Ulmer, 1903 | | 46 | Species | Taxom |
| Gracillariidae Stainton, 1854 | Blotch leaf miner moths | 16 | Species | Taxom |
| Gyrinidae Latreille, 1802 | Whirligig beetle | 177 | Species | Taxom |
| Halictidae Thomson, 1869 | Flower bees | 563 | Species | Taxom |
| Haliplidae Aubé, 1836 | Crawling Water Beetle | 167 | Species | Taxom |
| Helicopsychidae Ulmer, 1912 | Snail Case caddisflies | 8 | Species | Taxom |
| Helotidae Reitter, 1876 | | 93 | Species | Taxom |
| Hepialidae Stephens, 1829 | Ghost Moths | 3 | Species | Taxom |
| Hesperiidae Latreille, 1809 | Indet. Skipper | 60 | Species | Taxom |
| Heteroceridae MacLeay, 1825 | Mud beetles | 195 | Species | Taxom |
| Heterogastridae Stål, 1872 | | 5 | Species | Taxom |
| Heterogynidae Rambur, 1866 | Mediterranean Burnet Moths | 4 | Species | Taxom |
| Hippoboscidae Samouelle, 1819 | Keds | 3 | Species | Taxom |
| Histeridae Gyllenhal, 1808 | Clown beetle | 1562 | Species | Taxom |
| Hodotermitidae Desneux, 1904 | Harvester termites | 20 | Species | Taxom |
| Homotomidae Heslop-Harrison, 1958 | | 1 | Species | Taxom |
| Hybosoridae Erichson, 1847 | Pill scarab beetles | 63 | Species | Taxom |
| Hybotidae Meigen, 1820 | Dance flies | 6 | Species | Taxom |
| Hydraenidae Mulsant, 1844 | Cascade Beetles | 1053 | Species | Taxom |
| Hydrobiosidae Ulmer, 1905 | | 163 | Species | Taxom |
| Hydrophilidae Latreille, 1802 | Silver Water Beetles | 1470 | Species | Taxom |
| Hydropsychidae Curtis, 1835 | Net Spinning caddisflies | 120 | Species | Taxom |
| Hydroptilidae Stephens, 1836 | Micro caddisflies | 550 | Species | Taxom |
| Hydroscaphidae LeConte, 1874 | Skiff beetle | 12 | Species | Taxom |
| Hygrobiidae Régimbart, 1878 | Screech beetles | 3 | Species | Taxom |
| Ichneumonidae Latreille, 1802 | Ichneumon flies | 74 | Species | Taxom |
| Incurvariidae Spuler, 1898 | Fairy moths | 1 | Species | Taxom |
| Issidae Spinola, 1839 | Issid planthoppers | 2 | Species | Taxom |
| Jacobsoniidae Heller, 1926 | Jacobson's beetles | 3 | Species | Taxom |
| Jurodidae Ponomarenko, 1985 | Jurodids | 1 | Species | Taxom |
| Kalotermitidae Froggatt, 1897 | Dampwood termites | 34 | Species | Taxom |
| Kateretidae Kirkby, 1837 | Pollen Beetles | 14 | Species | Taxom |
| Keroplatidae Rondani, 1856 | Fungus gnats | 1 | Species | Taxom |
| Kinnaridae Muir, 1925 | Kinnarid Planthoppers | 1 | Species | Taxom |
| Laemophloeidae (Ganglbauer, 1899) | Lined flat bark beetles | 5 | Species | Taxom |
| Lampyridae Latreille, 1817 | Fireflies | 390 | Species | Taxom |
| Largidae Amyot and Se..., 1843 | Bordered plant bugs | 2 | Species | Taxom |
| Lasiocampidae Harris, 1841 | Eggar Moths | 34 | Species | Taxom |
| Latridiidae Erichson, 1842 | Minute brown scavenger beetle | 606 | Species | Taxom |
| Lecithoceridae Le Marchand, 1947 | Long-horned moths | 2 | Species | Taxom |
| Leiodidae Fleming, 1821 | Round fungus beetles | 3199 | Species | Taxom |
| Lemoniidae Hampson, 1918 | Autumn Silkworm Moths | 4 | Species | Taxom |
| Lepidostomatidae Ulmer, 1903 | Bizarre Caddisflies | 95 | Species | Taxom |
| Leptoceridae Leach, 1815 | Long Horned caddisflies | 233 | Species | Taxom |
| Leuctridae Klapálek, 1905 | Needle Or Willow Stoneflies | 68 | Species | Taxom |
| Limacodidae Duponchel, 1845 | Cup moths | 4 | Species | Taxom |
| Limnephilidae Kolenati, 1848 | Northern caddisflies | 580 | Species | Taxom |
| Limnichidae Erichson, 1846 | Minute marsh loving beetle | 78 | Species | Taxom |
| Limnocentropodidae Tsuda, 1942 | | 2 | Species | Taxom |
| Limoniidae (Speiser, 1909) | Craneflies | 376 | Species | Taxom |
| Liviidae Low, 1879 | | 6 | Species | Taxom |
| Lophopidae Stål, 1866 | | 5 | Species | Taxom |
| Lucanidae Latreille, 1804 | Stag Beetle | 715 | Species | Taxom |
| Lycaenidae Leach, 1815 | And blues | 148 | Species | Taxom |
| Lycidae Laporte, 1836 | Lycid beetles | 589 | Species | Taxom |
| Lygaeidae Schilling, 1829 | Chinch bugs | 43 | Species | Taxom |
| Lymexylidae Fleming, 1821 | Ship-timber beetle | 44 | Species | Taxom |
| Lyonetiidae Stainton, 1854 | Lyonet Moths | 3 | Species | Taxom |
| Malcidae Stål, 1865 | | 1 | Species | Taxom |
| Mantidae Burmeister, 1838 | Mantids | 1 | Species | Taxom |
| Mastotermitidae Desneux, 1904 | | 16 | Species | Taxom |
| Meenoplidae Fieber, 1872 | | 1 | Species | Taxom |
| Megalopodidae Latreille, 1802 | Megalopodid Leaf Beetles | 108 | Species | Taxom |
| Melandryidae Leach, 1815 | False Darkling Beetle | 333 | Species | Taxom |
| Meloidae Gyllenhal, 1810 | Blister Beetle | 2033 | Species | Taxom |
| Melolonthidae (Leach, 1817) | Chafers | 66 | Species | Taxom |
| Melyridae Leach, 1815 | Malachite Beetles | 3203 | Species | Taxom |
| Mesopsychidae Tillyard, 1917 | | 0 | Species | Taxom |
| Micromalthidae Barber, 1913 | Micromalthid beetles | 1 | Species | Taxom |
| Microphysidae Dohrn, 1859 | Microphysid bugs | 8 | Species | Taxom |
| Micropterigidae Herrich-Schä..., 1855 | Mandibulate Archaic Moths | 6 | Species | Taxom |
| Milichiidae Schiner, 1862 | Filth flies | 1 | Species | Taxom |
| Miridae Hahn, 1831 | Capsid bugs | 107 | Species | Taxom |
| Molannidae Wallengren, 1891 | Hood Casemaker Caddisflies | 3 | Species | Taxom |
| Monotomidae Laporte, 1840 | Minute Clubbed Beetles | 161 | Species | Taxom |
| Mordellidae Latreille, 1802 | Pintail beetles | 845 | Species | Taxom |
| Muscidae Latreille, 1802 | Face flies | 110 | Species | Taxom |
| Mutillidae André, 1907 | Cow ant | 1 | Species | Taxom |
| Mycetophagidae Leach, 1815 | Hairy fungus beetle | 147 | Species | Taxom |
| Mycetophilidae Newman, 1834 | Fungus Gnat | 3 | Species | Taxom |
| Mycteridae Blanchard, 1845 | Mycterid beetles | 14 | Species | Taxom |
| Mymarommatidae Debauche, 1948 | False fairy wasp | 1 | Species | Taxom |
| Necrotauliidae Handlirsch, 1906 | | 1 | Species | Taxom |
| Nemestrinidae Macquart, 1834 | Tangle-veined flies | 1 | Species | Taxom |
| Nemonychidae Bedel, 1882 | Nemonychid weevils | 21 | Species | Taxom |
| Nemouridae Newman, 1853 | Brown stoneflies | 92 | Species | Taxom |
| Nepticulidae Stainton, 1854 | Leaf miners | 38 | Species | Taxom |
| Nitidulidae Latreille, 1802 | Nitidules | 1579 | Species | Taxom |
| Noctuidae Latreille, 1809 | Armyworms | 697 | Species | Taxom |
| Nolidae Hampson, 1894 | Hatted Caterpillars | 24 | Species | Taxom |
| Nosodendridae Erichson, 1846 | Nosodendrid beetles | 13 | Species | Taxom |
| Noteridae C. G. Thomson, 1860 | Burrowing water beetle | 56 | Species | Taxom |
| Notodontidae Stephens, 1829 | Bag Shelter Moths | 46 | Species | Taxom |
| Nymphalidae Rafinesque, 1815 | Admirals | 219 | Species | Taxom |
| Ochodaeidae Mulsant & Rey, 1870 | Sand-loving scarab beetle | 72 | Species | Taxom |
| Odontoceridae Wallengren, 1891 | Mortarjoint Casemaker Caddisflies | 12 | Species | Taxom |
| Oecophoridae Bruand, 1851 | Concealer Moths | 25 | Species | Taxom |
| Oedemeridae Latreille, 1810 | False Blister Beetle | 685 | Species | Taxom |
| Oestridae Leach, 1815 | Bot flies | 3 | Species | Taxom |
| Omethidae LeConte, 1861 | False fireflies | 5 | Species | Taxom |
| Opostegidae Meyrick, 1893 | Opostegid moths | 12 | Species | Taxom |
| Ormyridae Förster, 1856 | Armyrids | 1 | Species | Taxom |
| Orsodacnidae Thomson, 1859 | Orsodacnid Leaf Beetles | 38 | Species | Taxom |
| Otitidae (Macquart, 1835) | Picture-winged flies | 4 | Species | Taxom |
| Papilionidae Latreille, 1802 | Apollos | 23 | Species | Taxom |
| Passalidae Leach, 1815 | Bess beetle | 42 | Species | Taxom |
| Pediciidae Osten Sacken, 1860 | Hairy-Eyed Crane Flies | 34 | Species | Taxom |
| Peltoperlidae Claassen, 1931 | Roach stoneflies | 7 | Species | Taxom |
| Perilampidae Latreille, 1809 | Perilampid waps | 1 | Species | Taxom |
| Perlidae (Latreille, 1802) | Common stoneflies | 33 | Species | Taxom |
| Perlodidae Klapálek, 1912 | Perlodid stoneflies | 19 | Species | Taxom |
| Permelcanidae Sharov, 1962 | | 2 | Species | Taxom |
| Phacopteronidae Heslop-Harrison, 1958 | | 1 | Species | Taxom |
| Phalacridae Leach, 1815 | Shining flower beetles | 288 | Species | Taxom |
| Phengodidae LeConte, 1861 | Glow-worms | 18 | Species | Taxom |
| Philopotamidae Stephens, 1829 | Finger Net caddisflies | 109 | Species | Taxom |
| Phloeostichidae Reitter, 1911 | | 1 | Species | Taxom |
| Phloiophilidae Kiesenwetter, 1863 | | 4 | Species | Taxom |
| Phoridae Curtis, 1833 | Coffin Flies | 1 | Species | Taxom |
| Phryganeidae (Leach, 1815) | Giant casemaker | 43 | Species | Taxom |
| Phryganopsychidae Wiggins, 1959 | | 2 | Species | Taxom |
| Pieridae Duponchel, 1835 | And Sulphurs | 76 | Species | Taxom |
| Piophilidae Macquart, 1835 | Cheese flies | 4 | Species | Taxom |
| Pipunculidae Walker, 1834 | Big headed flies | 4 | Species | Taxom |
| Plutellidae Guenée, 1845 | Diamond-back moths | 1 | Species | Taxom |
| Polycentropodidae Ulmer, 1903 | Tube Maker Caddisflies | 117 | Species | Taxom |
| Pompilidae Latreille, 1805 | Pompilid wasps | 4 | Species | Taxom |
| Prionoceridae Lacaordaire, 1857 | | 69 | Species | Taxom |
| Prionoglarididae Badonnel, 1951 | Large-winged Psocids | 0 | Species | Taxom |
| Prodoxidae Riley, 1881 | Yucca Moths | 1 | Species | Taxom |
| Prostomidae C. G. Thomson, 1859 | Jugular-horned beetle | 13 | Species | Taxom |
| Psephenidae Lacordaire, 1854 | Water pennies | 115 | Species | Taxom |
| Psychidae Boisduval, 1828 | Bagmoths | 24 | Species | Taxom |
| Psychodidae Newman, 1834 | Drain flies | 1 | Species | Taxom |
| Psychomyiidae Walker, 1852 | Net Tube Caddisflies | 137 | Species | Taxom |
| Psyllidae Latreille, 1807 | Jumping plant lice | 5 | Species | Taxom |
| Pterogeniidae Crowson, 1953 | | 1 | Species | Taxom |
| Pteromalidae Dalman, 1820 | Pteromalid wasps | 6 | Species | Taxom |
| Pterophoridae Zeller, 1841 | Plume Moths | 29 | Species | Taxom |
| Ptiliidae Heer, 1843 | Feather-wing beetles | 403 | Species | Taxom |
| Ptilodactylidae Laporte, 1836 | Ptilodactylid beetles | 68 | Species | Taxom |
| Ptinidae Latreille, 1802 | Death-watch and Spider Beetles | 1396 | Species | Taxom |
| Pyralidae Latreille, 1802 | Flour Moths | 70 | Species | Taxom |
| Pyrochroidae Latreille, 1807 | Cardinal beetles | 118 | Species | Taxom |
| Pythidae Solier, 1834 | Dead log bark beetles | 15 | Species | Taxom |
| Reduviidae Latreille, 1807 | Assassin and thread-legged bugs | 1 | Species | Taxom |
| Rhagionidae Latreille, 1802 | Snipe flies | 7 | Species | Taxom |
| Rhagophthalmidae Olivier, 1907 | | 3 | Species | Taxom |
| Rhinotermitidae Froggatt, 1897 | Subterranean termites | 60 | Species | Taxom |
| Rhipiceridae Latreille, 1834 | Cedar beetles | 18 | Species | Taxom |
| Rhipiphoridae Gemminger & ..., 1870 | Hump back beetles | 26 | Species | Taxom |
| Rhyacophilidae Stephens, 1836 | Free-living Caddisflies | 9 | Species | Taxom |
| Rhyparochromidae Amyot & Serv..., 1843 | Dirt-colored Seed Bugs | 1 | Species | Taxom |
| Ricaniidae Amyot & Audi..., 1843 | | 4 | Species | Taxom |
| Riodinidae Grote, 1895 | Metalmark Butterflies | 42 | Species | Taxom |
| Ripiphoridae Gemminger & ..., 1870 | Rhipiphoridae | 159 | Species | Taxom |
| Rutelidae (MacLeay, 1819) | | 37 | Species | Taxom |
| Salpingidae Leach, 1815 | Narrow-waisted bark beetle | 142 | Species | Taxom |
| Sarcophagidae Macquart, 1834 | Flesh flies | 17 | Species | Taxom |
| Saturniidae Boisduval, 1837 | And Giant Silk Moths | 12 | Species | Taxom |
| Scarabaeidae Latreille, 1802 | Dung beetles | 13345 | Species | Taxom |
| Scathophagidae Robineau-Des..., 1830 | Dung flies | 1 | Species | Taxom |
| Schreckensteiniidae Fletcher, 1929 | Bristle Legged Moths | 1 | Species | Taxom |
| Sciomyzidae Fallen, 1820 | Marsh Flies | 2 | Species | Taxom |
| Scirtidae Fleming, 1821 | Marsh Beetle | 385 | Species | Taxom |
| Sclerogibbidae Ashmead, 1902 | Sclerogibbid wasp | 3 | Species | Taxom |
| Scopuridae Ueno, 1935 | | 4 | Species | Taxom |
| Scraptiidae Mulsant, 1856 | Antlike leaf beetles | 348 | Species | Taxom |
| Scydmaenidae (Leach, 1815) | Ant-like stone beetles | 1291 | Species | Taxom |
| Sepsidae Walker, 1833 | Black scavenger flies | 48 | Species | Taxom |
| Sericostomatidae Stephens, 1836 | Bushtailed Caddisflies | 44 | Species | Taxom |
| Sesiidae Boisduval, 1828 | Clear Wings | 394 | Species | Taxom |
| Signiphoridae Howard, 1894 | Signiphorid waps | 1 | Species | Taxom |
| Silphidae Latreille, 1807 | Burying And Carrion Beetles | 413 | Species | Taxom |
| Silvanidae Kirby, 1837 | Flat bark beetles | 180 | Species | Taxom |
| Simuliidae Newman, 1834 | Black flies | 3 | Species | Taxom |
| Sphaeritidae Schuckard, 1839 | False clown beetle | 4 | Species | Taxom |
| Sphaeriusidae Erichson, 1845 | Minute Bog Beetles | 9 | Species | Taxom |
| Sphaeroceridae Macquart, 1835 | Dung flies | 4 | Species | Taxom |
| Sphecidae Latreille, 1802 | Digger & Sand wasps | 1 | Species | Taxom |
| Sphindidae Jacquelin du..., 1860 | Cryptic slime mold beetle | 22 | Species | Taxom |
| Sphingidae Latreille, 1802 | Hawk Moths | 299 | Species | Taxom |
| Staphylinidae Lameere, 1900 | Rove beetles | 21854 | Species | Taxom |
| Stenopsychidae Martynov, 1924 | | 26 | Species | Taxom |
| Stenotrachelidae C. G. Thomson, 1859 | False long-horned beetles | 19 | Species | Taxom |
| Stratiomyidae Latreille, 1802 | Soldier flies | 1 | Species | Taxom |
| Styloperlidae Illies, 1966 | | 1 | Species | Taxom |
| Synteliidae Lewis, 1882 | | 3 | Species | Taxom |
| Syrphidae Latreille, 1802 | Drone flies | 6 | Species | Taxom |
| Tabanidae Latreille, 1802 | Breeze flies | 2 | Species | Taxom |
| Tachinidae (Robineau-Des..., 1830) | Bristle Flies | 12 | Species | Taxom |
| Taeniopterygidae Klapálek, 1905 | Taeniopterygid winter stoneflies | 15 | Species | Taxom |
| Tenebrionidae Latreille, 1802 | Darkling Beetle | 10804 | Species | Taxom |
| Tephritidae Newman, 1834 | Fruit flies | 4 | Species | Taxom |
| Teredidae Seidlitz, 1888 | | 143 | Species | Taxom |
| Termitidae Latreille, 1802 | Higher termites | 90 | Species | Taxom |
| Termopsidae Grassé, 1949 | Damp wood termite | 6 | Species | Taxom |
| Tethinidae (Hendel, 1916) | Tethinid flies | 2 | Species | Taxom |
| Tetratomidae Billberg, 1820 | Polypore fungus beetle | 81 | Species | Taxom |
| Tettigometridae Germar, 1821 | | 1 | Species | Taxom |
| Thanerocleridae Chapin, 1921 | | 12 | Species | Taxom |
| Throscidae Laporte, 1840 | False metallic wood-boring beetles | 68 | Species | Taxom |
| Thyrididae Herrich-Schä..., 1846 | Picture Winged Leaf Moths | 1 | Species | Taxom |
| Tineidae Latreille, 1810 | & Allies | 30 | Species | Taxom |
| Tipulidae Latreille, 1802 | Crane Flies | 3516 | Species | Taxom |
| Torridincolidae Steffan, 1964 | | 1 | Species | Taxom |
| Tortricidae Latreille, 1803 | Bell Moths | 196 | Species | Taxom |
| Torymidae Walker, 1833 | Apple seed chalcids | 3 | Species | Taxom |
| Trachypachidae C. G. Thomson, 1857 | False ground beetle | 5 | Species | Taxom |
| Trichoceridae Rondani, 1841 | Winter Crane Flies | 1 | Species | Taxom |
| Trictenotomidae Blanchard, 1845 | Croc beetles | 9 | Species | Taxom |
| Triozidae Löw, 1879 | Jumping plant lice | 4 | Species | Taxom |
| Trogidae (MacLeay, 1819) | Gnawer beetles | 185 | Species | Taxom |
| Trogossitidae Latreille, 1802 | Bark gnawing beetle | 86 | Species | Taxom |
| Tropiduchidae Stål, 1866 | Tropiduchid Planthoppers | 3 | Species | Taxom |
| Uenoidae Iwata, 1927 | Stonecase Caddisflies | 5 | Species | Taxom |
| Uraniidae Blanchard, 1845 | Swallowtail Moths | 15 | Species | Taxom |
| Urodidae Kyrki, 1984 | False Burnet Moths | 1 | Species | Taxom |
| Vesperidae Mulsant, 1839 | Vesperid longicorn beetles | 44 | Species | Taxom |
| Vespidae Leach, 1815 | And Allies | 47 | Species | Taxom |
| Xiphocentronidae Schmid, 1982 | | 1 | Species | Taxom |
| Xyloryctidae Meyrick, 1890 | Flower Moths | 3 | Species | Taxom |
| Yponomeutidae Stephens, 1829 | Ermine Moths | 15 | Species | Taxom |
| Ypsolophidae Guenée, 1845 | Ypsolophid Moths | 7 | Species | Taxom |
| Zopheridae Solier, 1834 | Cylindrical bark beetles | 332 | Species | Taxom |
| Zygaenidae Latreille, 1809 | Burnet Forester | 60 | Species | Taxom |
