| Acoma cazieri Saylor, 1948 | |
| Acoma confusa Van Dyke, 1928 | Duck barnacle |
| Acoma dilemma Saylor, 1948 | |
| Acoma glabrata Cazier, 1953 | |
| Acoma incognita Howden, 1958 | |
| Acoma leechi Cazier, 1953 | |
| Acoma ochlera Howden, 1958 | |
| Acoma parva Howden, 1958 | |
| Acoma robusta Van Dyke, 1928 | Duck barnacle |
| Acoma rossi Saylor, 1948 | |
| Acoma sexfoliata Saylor, 1948 | |
| Acoma stathami Cazier, 1953 | |
| Amblonoxia bidentata Fall, 1932 | |
| Amblonoxia carpenteri LeConte, 1876 | |
| Amblonoxia fieldi Fall, 1908 | |
| Amblonoxia harfordi Casey, 1889 | |
| Amblonoxia palpalis Horn, 1880 | |
| Amblonoxia riversi Casey, 1895 | |
| Amphimallon (Amphimallon) majale Razoumowsky, 1789 | European Chafer |
| Amphimallon lusitanicum Gyllenhal, 1817 | |
| Barybas idiota Bates, 1887 | |
| Chnaunanthus chapini Saylor, 1937 | |
| Chnaunanthus flavipennis G. Horn, 1867 | Atlantic wolffish |
| Coenonycha acuta Cazier, 1943 | Rippled blenny |
| Coenonycha ampla Cazier, 1943 | Rippled blenny |
| Coenonycha barri Cazier, 1943 | Rippled blenny |
| Coenonycha bowlesi Cazier, 1943 | Rippled blenny |
| Coenonycha clementina Casey, 1909 | San Clemente Island coenonycha beetle |
| Coenonycha clypeata McClay, 1943 | |
| Coenonycha crispata McClay, 1943 | |
| Coenonycha cunninghami McPeak & Lago, 2022 | |
| Coenonycha dimorpha Evans & Smith, 1986 | Moustached rockskipper |
| Coenonycha evansi McPeak & Lago, 2022 | |
| Coenonycha faulkneri McPeak & Lago, 2022 | |
| Coenonycha fuga Cazier, 1943 | Rippled blenny |
| Coenonycha fulva McClay, 1943 | |
| Coenonycha fusca McClay, 1943 | |
| Coenonycha globosa McClay, 1943 | |
| Coenonycha hageni Cazier, 1943 | Rippled blenny |
| Coenonycha haskinsi McPeak & Lago, 2022 | |
| Coenonycha inaja McPeak & Lago, 2022 | |
| Coenonycha jacumba McPeak & Lago, 2022 | |
| Coenonycha kumeyaay McPeak & Lago, 2022 | |
| Coenonycha lurida Cazier, 1943 | Rippled blenny |
| Coenonycha mediata Cazier, 1943 | Rippled blenny |
| Coenonycha ochreata Evans & Smith, 1986 | Moustached rockskipper |
| Coenonycha ovatis McClay, 1943 | |
| Coenonycha ovipennis Horn, 1876 | |
| Coenonycha pallida Cazier, 1943 | Rippled blenny |
| Coenonycha parvula Fall, 1901 | |
| Coenonycha pascuensis Potts, 1945 | Horned rockskipper |
| Coenonycha purshiae Cazier, 1943 | Rippled blenny |
| Coenonycha pygmaea Evans & Smith, 1986 | |
| Coenonycha rotundata LeConte, 1856 | |
| Coenonycha rubida McClay, 1943 | |
| Coenonycha santacruzae Evans & Smith, 1986 | Moustached rockskipper |
| Coenonycha saylori Cazier, 1943 | Rippled blenny |
| Coenonycha scotti McClay, 1943 | |
| Coenonycha socialis Horn, 1876 | |
| Coenonycha stohleri Saylor, 1935 | Streaky rockskipper |
| Coenonycha testacea Cazier, 1937 | |
| Coenonycha tingi Cazier, 1937 | |
| Coenonycha utahensis McClay, 1943 | |
| Dichelonyx backi Kirby, 1837 | Green rose chafer |
| Dichelonyx backii backii | |
| Dichelonyx clypeata Horn, 1876 | |
| Dichelonyx crumbi Hatch, 1971 | |
| Dichelonyx decolorata Fall, 1901 | |
| Dichelonyx elongatula Schönherr, 1817 | Solf-winged flower beetles |
| Dichelonyx fulgida LeConte, 1856 | |
| Dichelonyx fulgida crotchi Horn, 1876 | |
| Dichelonyx fulgida fulgida | |
| Dichelonyx fulgida mormona Fall, 1907 | |
| Dichelonyx fuscula LeConte, 1856 | Aquatic oligochaete worm |
| Dichelonyx lateralis Fall, 1901 | |
| Dichelonyx magnesae McPeak & Lago, 2020 | |
| Dichelonyx muscula Fall, 1901 | |
| Dichelonyx nana Fall, 1901 | |
| Dichelonyx oregona Van Dyke, 1918 | |
| Dichelonyx pallens LeConte, 1856 | Aquatic oligochaete worm |
| Dichelonyx picea Horn, 1894 | |
| Dichelonyx pusilla LeConte, 1856 | Aquatic oligochaete worm |
| Dichelonyx pusillus LeConte, 1856 | |
| Dichelonyx robusta Fall, 1901 | |
| Dichelonyx sulcata LeConte, 1856 | Aquatic oligochaete worm |
| Dichelonyx sulcata sulcata | |
| Dichelonyx truncata LeConte, 1856 | Aquatic oligochaete worm |
| Dichelonyx vaga Fall, 1901 | |
| Dichelonyx valida LeConte, 1856 | Aquatic oligochaete worm |
| Dichelonyx vandykei Saylor, 1932 | |
| Dichelonyx vicina Fall, 1901 | |
| Dichelonyx vicinus vicinus | |
| Dinacoma caseyi Blaisdell, 1930 | Casey's June beetle |
| Dinacoma marginata Casey, 1889 | |
| Dinacoma sanfelipe Gillett, Osb..., 2020 | |
| Diplotaxis anthracina Fall, 1909 | |
| Diplotaxis anxius LeConte, 1856 | |
| Diplotaxis aurora ♰ H. F. Wickham, 1913 | |
| Diplotaxis basalis Fall, 1909 | |
| Diplotaxis belfragei Fall, 1909 | |
| Diplotaxis brachyptera Vaurie, 1960 | |
| Diplotaxis brevicollis LeConte, 1856 | Aquatic oligochaete worm |
| Diplotaxis carbonata LeConte, 1856 | Aquatic oligochaete worm |
| Diplotaxis conformis Fall, 1909 | |
| Diplotaxis corbula Vaurie, 1960 | |
| Diplotaxis corvina LeConte, 1856 | Aquatic oligochaete worm |
| Diplotaxis dahli Cazier, 1940 | |
| Diplotaxis denigrata Bates, 1889 | |
| Diplotaxis dentella Fall, 1909 | |
| Diplotaxis deserta Fall, 1932 | |
| Diplotaxis fimbriata Fall, 1909 | |
| Diplotaxis fossipalpa Fall, 1909 | |
| Diplotaxis frondicola Say, 1825 | |
| Diplotaxis harperi Blanchard, 1851 | |
| Diplotaxis haydeni LeConte, 1856 | |
| Diplotaxis haydenii LeConte, 1856 | Aquatic oligochaete worm |
| Diplotaxis incuria Fall, 1932 | |
| Diplotaxis insignis LeConte, 1861 | |
| Diplotaxis knausi Schaeffer, 1907 | |
| Diplotaxis knausii Schaeffer, 1907 | Prairie grain wireworm |
| Diplotaxis mentalis Fall, 1909 | |
| Diplotaxis moerens LeConte, 1856 | Aquatic oligochaete worm |
| Diplotaxis moerens moerens LeConte, 1856 | |
| Diplotaxis moerens peninsularis Fall, 1909 | |
| Diplotaxis obscura LeConte, 1859 | |
| Diplotaxis pacata LeConte, 1856 | Aquatic oligochaete worm |
| Diplotaxis parallela Fall, 1909 | |
| Diplotaxis parvicollis Fall, 1909 | |
| Diplotaxis pinalica Fall, 1932 | |
| Diplotaxis polita Fall, 1909 | |
| Diplotaxis puberula LeConte, 1863 | |
| Diplotaxis residua Fall, 1909 | |
| Diplotaxis rufiola Fall, 1909 | |
| Diplotaxis sierrae Fall, 1909 | |
| Diplotaxis simplicipes ♰ H. F. Wickham, 1912 | |
| Diplotaxis subangulata LeConte, 1856 | Aquatic oligochaete worm |
| Diplotaxis tenebrosa Fall, 1909 | |
| Diplotaxis tenuis LeConte, 1856 | Aquatic oligochaete worm |
| Diplotaxis thoracica Fall, 1909 | |
| Diplotaxis truncatula LeConte, 1856 | Aquatic oligochaete worm |
| Gymnopyge coquilletti Linell, 1895 | Maple Prominent |
| Gymnopyge hirsuta Cazier, 1939 | |
| Gymnopyge hopliaeformis Linell, 1895 | Maple Prominent |
| Gymnopyge pygmaea Linell, 1895 | Maple Prominent |
| Hoplia (Hoplia) callipyge LeConte, 1856 | Aquatic oligochaete worm |
| Hoplia (Hoplia) dispar LeConte, 1880 | |
| Hoplia (Hoplia) gilleti Hardy, 1977 | |
| Hoplia (Hoplia) hirta LeConte, 1880 | |
| Hoplia (Hoplia) laticollis LeConte, 1856 | Aquatic oligochaete worm |
| Hoplia (Hoplia) modesta Haldemann, 1843 | |
| Hoplia (Hoplia) mucorea (Germar, 1824) | ⇒ Hoplia gilleti Hardy, 1977 |
| Hoplia (Hoplia) sackenii LeConte, 1880 | |
| Hoplia (Hoplia) trifasciata Say, 1823 | Three lined Hoplia |
| Hoplia (Hoplia) trivialis Harold, 1869 | Dark Hoplia |
| Hoplia philanthus philanthus Fuesslin, 1775 | |
| Hoplia striatipennis ♰ H. F. Wickham, 1914 | |
| Isonychus phlaeopterus Blanchard, 1850 | |
| Lachnosterna hornii Smith, 1889 | |
| Lasioserica thoracica Brenske, 1898 | |
| Leucopholis lepidophora (Blanchard, 1851) | ⇒ Leucopholis burmeisteri Brenske, 1894 |
| Macrodactylus pluto ♰ H. F. Wickham, 1912 | |
| Macrodactylus propheticus ♰ H. F. Wickham, 1912 | |
| Macrodactylus suavis Bates, 1887 | |
| Macrodactylus subspinosus Fabricius, 1775 | American Rose Chafer |
| Maladera (Cephaloserica) castanea Arrow, 1913 | Asian garden beetle |
| Maladera (Paramaladera) alternata LeConte, 1856 | |
| Maladera alternata exolita Dawson, 1933 | |
| Maladera alternata patruela Dawson, 1933 | |
| Miolachnosterna tristoides ♰ Wickham, 1914 | |
| Oncerus floralis LeConte, 1856 | Aquatic oligochaete worm |
| Pachydema menieri Baraud, 1985 | |
| Pachydema navatteae Baraud, 1985 | |
| Phobetus ciliatus Barrett, 1935 | |
| Phobetus comatus LeConte, 1856 | Aquatic oligochaete worm |
| Phobetus humeralis Cazier, 1937 | |
| Phobetus mojavus Barrett, 1933 | Sabretooth blenny |
| Phobetus palpalis Saylor, 1936 | Olive blenny |
| Phobetus panamintensis Hardy, 1978 | Molly miller |
| Phobetus saylori Cazier, 1937 | |
| Phobetus testaceus LeConte, 1861 | |
| Phyllophaga (Listrochelus) carminator Horn, 1894 | |
| Phyllophaga (Listrochelus) disparilis Horn, 1878 | |
| Phyllophaga (Listrochelus) falsa LeConte, 1856 | |
| Phyllophaga (Listrochelus) fimbripes LeConte, 1856 | |
| Phyllophaga (Listrochelus) miraflora Saylor, 1940 | |
| Phyllophaga (Listrochelus) mucorea LeConte, 1856 | |
| Phyllophaga (Listrochelus) timida Horn, 1878 | |
| Phyllophaga (Phyllophaga) anxia LeConte, 1850 | Cranberry White Grub |
| Phyllophaga (Phyllophaga) arkansana Schaeffer, 1906 | |
| Phyllophaga (Phyllophaga) bipartita Horn, 1887 | |
| Phyllophaga (Phyllophaga) canipolea Saylor, 1948 | |
| Phyllophaga (Phyllophaga) contaminata Fall, 1932 | |
| Phyllophaga (Phyllophaga) corrosa LeConte, 1856 | |
| Phyllophaga (Phyllophaga) crassissima Blanchard, 1851 | |
| Phyllophaga (Phyllophaga) crenulata Frölich, 1792 | |
| Phyllophaga (Phyllophaga) drakii Kirby, 1837 | |
| Phyllophaga (Phyllophaga) errans LeConte, 1860 | |
| Phyllophaga (Phyllophaga) farcta LeConte, 1856 | Distended May beetle |
| Phyllophaga (Phyllophaga) fervida Fabricius, 1775 | |
| Phyllophaga fraterna fraterna Harris, 1842 | |
| Phyllophaga (Phyllophaga) fusca Frölich, 1792 | Northern June beetle |
| Phyllophaga (Phyllophaga) gracilis Burmeister, 1855 | Highfin blenny |
| Phyllophaga gracilis gracilis | |
| Phyllophaga (Phyllophaga) hirticula Knoch, 1801 | |
| Phyllophaga (Phyllophaga) hornii Smith, 1889 | |
| Phyllophaga (Phyllophaga) implicita Horn, 1887 | |
| Phyllophaga (Phyllophaga) latifrons LeConte, 1856 | |
| Phyllophaga (Phyllophaga) longitarsa Say, 1824 | |
| Phyllophaga (Phyllophaga) nitida LeConte, 1856 | |
| Phyllophaga (Phyllophaga) reevesi Saylor, 1939 | Impspringer |
| Phyllophaga (Phyllophaga) rugosa Melsheimer, 1845 | Rugose June beetle |
| Phyllophaga (Phyllophaga) sequoiana Saylor, 1936 | Olive blenny |
| Phyllophaga (Phyllophaga) sociata Horn, 1878 | |
| Phyllophaga (Phyllophaga) stohleri Saylor, 1938 | |
| Phyllophaga (Phyllophaga) subtonsa LeConte, 1856 | |
| Phyllophaga (Phyllophaga) vilifrons LeConte, 1856 | |
| Phyllophaga (Phyllophaga) xerophila Saylor, 1939 | Impspringer |
| Phyllophaga (Phytalus) bilobatata Saylor, 1939 | Impspringer |
| Phyllophaga (Phytalus) obsoleta Blanchard, 1851 | |
| Phyllophaga (Phytalus) pruinosa Blanchard, 1851 | |
| Phyllophaga (Tostegoptera) lanceolata Say, 1824 | |
| Phyllophaga avus ♰ T. D. A. Coc..., 1921 | |
| Phyllophaga caraga Saylor, 1943 | |
| Phyllophaga disrupta ♰ T. D. A. Coc..., 1927 | |
| Phyllophaga extincta ♰ H. F. Wickham, 1916 | |
| Phyllophaga gigantea | |
| Phyllophaga guapiles Saylor, 1941 | |
| Phyllophaga knausi Schaeffer, 1907 | |
| Phyllophaga nevermanni Saylor, 1935 | |
| Phyllophaga orosina Moser, 1918 | |
| Phyllophaga panamana Chapin, 1935 | |
| Phyllophaga polyphylla Bates, 1888 | |
| Phyllophaga puerilis Wickham, 1914 | |
| Phyllophaga reventazona Saylor, 1936 | |
| Phyllophaga villifrons LeConte, 1856 | |
| Plectrodes pubescens G. Horn, 1867 | Eastern field wireworm |
| Podolasia emarginata Howden, 1954 | Manytoothed blenny |
| Podolasia emarginta | |
| Podolasia peninsularis Howden, 1954 | Manytoothed blenny |
| Podolasia varicolor Saylor, 1948 | |
| Polyphylla (Polyphylla) anteronivea Hardy, 1978 | Saline Valley snow-front June beetle |
| Polyphylla (Polyphylla) arguta Casey, 1914 | |
| Polyphylla (Polyphylla) avittata Hardy, 1978 | Spotted Warner Valley Dunes June beetle |
| Polyphylla (Polyphylla) barbata Cazier, 1938 | Mount Hermon June Beetle |
| Polyphylla (Polyphylla) cavifrons LeConte, 1854 | |
| Polyphylla (Polyphylla) crinita LeConte, 1856 | Aquatic oligochaete worm |
| Polyphylla (Polyphylla) decemlineata Say, 1823 | Ten-lined June Beetle |
| Polyphylla (Polyphylla) devestiva Young, 1966 | |
| Polyphylla (Polyphylla) diffracta Casey, 1891 | |
| Polyphylla (Polyphylla) erratica Hardy & Andrews, 1978 | Death Valley June Beetle |
| Polyphylla (Polyphylla) hammondi LeConte, 1856 | Aquatic oligochaete worm |
| Polyphylla (Polyphylla) modulata Casey, 1914 | |
| Polyphylla (Polyphylla) nigra Casey, 1914 | |
| Polyphylla (Polyphylla) nubila Van Dyke, 1947 | Atascadero June Beetle |
| Polyphylla (Polyphylla) petitii Guérin-Ménev..., 1844 | |
| Polyphylla (Polyphylla) ratcliffei Young, 1986 | |
| Polyphylla (Polyphylla) rugosipennis Casey, 1914 | |
| Polyphylla (Polyphylla) sobrina Casey, 1914 | |
| Polyphylla (Polyphylla) squamiventris Cazier, 1939 | |
| Polyphylla (Polyphylla) stellata Young, 1986 | Delta June beetle |
| Polyphylla aeolus La Rue, 1998 | |
| Polyphylla devestita Young, 1966 | |
| Polyphylla koso La Rue, 2016 | |
| Polyphylla morroensis La Rue, 2016 | |
| Polyphylla uteana (Tanner, 1928) | ⇒ Polyphylla diffracta Casey, 1891 |
| Rabula davisi Fowler, 1912 | |
| Rhizotrogus cicatricosus Mulsant, 1842 | |
| Serica (Serica) brunnea (Linnaeus, 1758) | ⇒ Serica similis Lewis, 1895 |
| Serica abdita Dawson, 1921 | |
| Serica acicula Dawson, 1932 | Rippled blenny |
| Serica acontia Dawson, 1933 | |
| Serica adversa Dawson, 1967 | |
| Serica alleni Saylor, 1939 | Impspringer |
| Serica ammomenisco Hardy, 1987 | Crescent Dunes serican scarab |
| Serica antediluviana ♰ H. F. Wickham, 1912 | |
| Serica anthracina LeConte, 1856 | Aquatic oligochaete worm |
| Serica aviceps Dawson, 1967 | |
| Serica barri Dawson, 1967 | |
| Serica bruneri Dawson, 1967 | |
| Serica calignosa Dawson, 1932 | |
| Serica campestris Dawson, 1919 | Mottled blenny |
| Serica catalina Dawson, 1947 | |
| Serica chaetosoma Dawson, 1932 | Rippled blenny |
| Serica chicoensis Saylor, 1939 | Impspringer |
| Serica coalinga Dawson, 1952 | Lined blenny |
| Serica cockerelli ♰ H. F. Wickham, 1914 | |
| Serica concinna Dawson, 1947 | |
| Serica craighead Saylor, 1939 | Impspringer |
| Serica cruzi Saylor, 1939 | Impspringer |
| Serica curvata LeConte, 1856 | Aquatic oligochaete worm |
| Serica cuyamaca Saylor, 1939 | Impspringer |
| Serica deserticola Dawson, 1952 | Lined blenny |
| Serica diablo Dawson, 1967 | |
| Serica egregia Dawson, 1921 | |
| Serica elmontea Saylor, 1939 | Impspringer |
| Serica elongatula Horn, 1870 | |
| Serica ensenada Saylor, 1948 | |
| Serica falcata Dawson, 1933 | |
| Serica falli Dawson, 1932 | Rippled blenny |
| Serica fimbriata LeConte, 1856 | Aquatic oligochaete worm |
| Serica heteracantha Dawson, 1967 | |
| Serica humboldti Gordon, 1975 | Sand diver |
| Serica intermixta Blatchley, 1910 | |
| Serica kanakoffi ♰ W. D. Pierce, 1946 | |
| Serica laguna Saylor, 1935 | Streaky rockskipper |
| Serica ligulata Dawson, 1932 | Rippled blenny |
| Serica ligulata ligulata Dawson, 1932 | |
| Serica ligulata praetermissa Dawson, 1932 | |
| Serica mackenziei Saylor, 1935 | |
| Serica mckenziei Saylor, 1935 | Streaky rockskipper |
| Serica mixta LeConte, 1856 | Aquatic oligochaete worm |
| Serica oliver Saylor, 1939 | Impspringer |
| Serica oliveri (Dawson, 1952) | ⇒ Serica oliver Saylor, 1939 |
| Serica pavonia Dawson, 1932 | Rippled blenny |
| Serica perigonia Dawson, 1920 | Pallid rockskipper |
| Serica perigonia perigonia Dawson, 1920 | |
| Serica pilifera (Horn, 1894) | ⇒ Lasioserica thoracica Brenske, 1898 |
| Serica porcula Casey, 1884 | |
| Serica prava Dawson, 1933 | |
| Serica pruinipennis (Saylor, 1940) | ⇒ Serica prunipennis Saylor, 1936 |
| Serica prunipennis Saylor, 1936 | Olive blenny |
| Serica psammobunus Hardy, 1987 | Sand Mountain serican scarab |
| Serica pullata Dawson, 1967 | |
| Serica repanda Dawson, 1933 | |
| Serica rossi Saylor, 1948 | |
| Serica sandiegensis Saylor, 1939 | Impspringer |
| Serica satrapa Dawson, 1947 | |
| Serica scaphia Dawson, 1952 | Lined blenny |
| Serica sculptilis Dawson, 1922 | |
| Serica senta Dawson, 1933 | |
| Serica serensia Saylor, 1948 | |
| Serica sericea Illiger, 1802 | Onespot fringehead |
| Serica serotina LeConte, 1856 | Aquatic oligochaete worm |
| Serica solita Dawson, 1922 | |
| Serica stygia Dawson, 1933 | |
| Serica subnisa Dawson, 1947 | |
| Serica variolosa Motschulsky, 1863 | |
| Serica ventura Dawson, 1932 | Lined blenny |
| Serica ventura dorsalis Dawson, 1952 | |
| Serica ventura personata Dawson, 1932 | |
| Serica ventura ventura Dawson, 1932 | |
| Serica watson Saylor, 1939 | Impspringer |
| Serica watsoni (Dawson, 1952) | ⇒ Serica watson Saylor, 1939 |
| Thyce deserta Hardy, 1974 | |
| Trichesthes apicata Reinhard, 1939 | |
| Trichesthes lenis Horn, 1887 | |
| Trichesthes tristis Fabricius, 1787 | |
