| Achalcus californicus Osten Sacken, 1886 | |
| Achalcus dytei Pollet & Cum..., 1998 | |
| Achalcus oregonensis Wiedemann, 1830 | |
| Achalcus similis Pollet & Cum..., 1998 | |
| Achalcus utahensis Harmston & M..., 1966 | |
| Achradocera arcuata Van Duzee, 1924 | Fly |
| Acropsilus albitibia Bickel, 1998 | |
| Acropsilus protractus Coquillett, 1892 | |
| Amblypsilopus anomalicornis Becker, 1922 | |
| Amblypsilopus californicus Steyskal, 1966 | |
| Amblypsilopus commoni Bickel, 1994 | |
| Amblypsilopus dorsalis Loew, 1866 | |
| Amblypsilopus fortescuia Bickel, 1994 | |
| Amblypsilopus graciliventris Parent, 1933 | |
| Amblypsilopus gressitti Bickel, 1994 | |
| Amblypsilopus putealis Bickel, 1994 | |
| Amblypsilopus trogon Bickel, 1994 | |
| Aphrosylus californicus Harmston, 1952 | Guyanese pepper |
| Aphrosylus grassator Wheeler, 1897 | Carpenter's groundcherry |
| Aphrosylus nigripennis Van Duzee, 1924 | Narrow-seeded yampah |
| Aphrosylus wirthi Harmston, 1951 | Higuillo |
| Argyra albicans Loew, 1861 | |
| Argyra albiventris Loew, 1864 | |
| Argyra argentiventris Van Duzee, 1925 | Oregon yampah |
| Argyra barbipes Van Duzee, 1925 | Oregon yampah |
| Argyra californica Van Duzee, 1925 | Oregon yampah |
| Argyra ciliata Van Duzee, 1924 | Narrow-seeded yampah |
| Argyra cingulata Loew, 1861 | |
| Argyra condomina Harmston & K..., 1946 | |
| Argyra currani Van Duzee, 1925 | Oregon yampah |
| Argyra cylindrica Loew, 1861 | |
| Argyra dakotensis Robinson, 1960 | |
| Argyra femoralis Van Duzee, 1925 | Oregon yampah |
| Argyra hirta Van Duzee, 1925 | Oregon yampah |
| Argyra idahona Harmston & K..., 1946 | |
| Argyra minuta Loew, 1861 | |
| Argyra nigripes Loew, 1864 | |
| Argyra nigriventris Van Duzee, 1925 | Oregon yampah |
| Argyra robusta Johnson, 1906 | California sandwort |
| Argyra scutellaris Van Duzee, 1925 | Oregon yampah |
| Argyra splendens Van Duzee, 1933 | Masterwort |
| Argyra utahna Harmston, 1951 | Higuillo |
| Asyndetud cornutus Van Duze, 1916 | |
| Asyndetus cornutus Van Duzee, 1916 | California yampah |
| Asyndetus crassipodus Harmston, 1968 | |
| Asyndetus flavipalpus Van Duzee, 1932 | |
| Asyndetus latus Van Duzee, 1916 | California yampah |
| Asyndetus nevadenis | |
| Asyndetus nevadensis Harmston, 1968 | |
| Asyndetus nigripes Van Duzee, 1916 | California yampah |
| Asyndetus occidentalis Van Duzee, 1919 | Gairdner's yampah |
| Asyndetus oregonensis Harmston, 1966 | Marigold pepper |
| Asyndetus parvicornis Van Duzee, 1932 | |
| Asyndetus scopifer Harmston, 1952 | Guyanese pepper |
| Asyndetus scopiferus | |
| Asyndetus spinitarsis Harmston, 1951 | Higuillo |
| Asyndetus utahensis Harmston & K..., 1942 | |
| Atlatlia flaviseta Bickel, 1986 | |
| Austrosciapus connexus Walker, 1835 | Green long-legged fly |
| Austrosciapus hollowayi Bickel, 1994 | |
| Austrosciapus pulvillus Bickel, 1994 | |
| Calyxochaetus millardi Meuffels & G..., 1999 | |
| Calyxochaetus vegetus Wheeler, 1899 | |
| Campsicnemus alaskensis Harmston & M..., 1966 | |
| Campsicnemus alexanderi Harmston & M..., 1966 | |
| Campsicnemus americanus Van Duzee, 1924 | Narrow-seeded yampah |
| Campsicnemus arcuatus Van Duzee, 1917 | Red-root yampah |
| Campsicnemus claudicans Loew, 1864 | |
| Campsicnemus coloradensis Harmston & M..., 1966 | |
| Campsicnemus curvispina Van Duzee, 1930 | Parsley |
| Campsicnemus degener Wheeler, 1899 | Heartleaf groundcherry |
| Campsicnemus dicondylus Hardy & Kohn, 1964 | Aridland peperomia |
| Campsicnemus melanus Harmston & K..., 1942 | |
| Campsicnemus milleri Harmston, 1966 | |
| Campsicnemus montanus Harmston & K..., 1942 | |
| Campsicnemus nigripes Van Duzee, 1917 | Red-root yampah |
| Campsicnemus oedipus Wheeler, 1899 | Heartleaf groundcherry |
| Campsicnemus oregonensis Harmston & M..., 1966 | |
| Campsicnemus philoctetes Wheeler, 1899 | Heartleaf groundcherry |
| Campsicnemus thersites Wheeler, 1899 | Heartleaf groundcherry |
| Campsicnemus utahensis Harmston & K..., 1942 | |
| Chaetogonopteron bartaki Olejnícek & ..., 2007 | |
| Chaetogonopteron capricorne Bickel, 2013 | |
| Chaetogonopteron colliepa Bickel, 2014 | |
| Chaetogonopteron ephydroides Bickel, 2014 | |
| Chaetogonopteron hamulitarsus Bickel, 2014 | |
| Chaetogonopteron lacrimulus Bickel, 2014 | |
| Chaetogonopteron pistillus Bickel, 2014 | |
| Chaetogonopteron vexillium Bickel, 2014 | |
| Chaetogonopteron weano Bickel, 2014 | |
| Chrysosoma lucare Bickel, 1994 | |
| Chrysosoma nobile Parent, 1933 | |
| Chrysosoma platychirus Frey, 1924 | |
| Chrysosoma pseudocallosum Bickel, 1994 | |
| Chrysosoma rubicundum Becker, 1922 | |
| Chrysotimus flavicornis Van Duzee, 1916 | California yampah |
| Chrysotus (Chrysotus) austrotropicus Bickel, 2013 | |
| Chrysotus (Chrysotus) pilbarensis Bickel, 2013 | |
| Chrysotus arcuatus (Van Duzee, 1924) | ⇒ Achradocera arcuatus Van Duzee, 1924 |
| Chrysotus argentatus Van Duzee, 1924 | Narrow-seeded yampah |
| Chrysotus barbipes Van Duzee, 1932 | |
| Chrysotus californicus Van Duzee, 1924 | Narrow-seeded yampah |
| Chrysotus choricus Wheeler, 1890 | Coastal groundcherry |
| Chrysotus cornutus Loew, 1862 | Jone's globemallow |
| Chrysotus harmstoni Meuffels & G..., 1999 | |
| Chrysotus idahoensis Van Duzee, 1924 | Narrow-seeded yampah |
| Chrysotus longimanus Loew, 1861 | |
| Chrysotus nudipes Van Duzee, 1924 | Narrow-seeded yampah |
| Chrysotus nudus Harmston & K..., 1963 | Black pepper |
| Chrysotus palpiger Wheeler, 1890 | |
| Chrysotus picticornis Loew, 1862 | Jone's globemallow |
| Chrysotus silvicola Harmston, 1951 | Higuillo |
| Chrysotus subcostatus Loew, 1864 | |
| Chrysotus vividus Loew, 1864 | |
| Chrysotus xanthocal Harmston & K..., 1940 | |
| Condylostylus bellulus Aldrich, 1896 | |
| Condylostylus caudatus Wiedemann, 1830 | |
| Condylostylus divergens Van Duzee, 1933 | Masterwort |
| Condylostylus occidentalis Bigot, 1888 | |
| Condylostylus patibulatus Say, 1823 | |
| Condylostylus praestans Aldrich, 1901 | |
| Condylostylus sipho Say, 1823 | |
| Corindia capricornis Bickel, 1986 | |
| Corindia collessi Bickel, 1986 | |
| Corindia gascoyensis Bickel, 2014 | |
| Corindia major Bickel, 1986 | |
| Cymatopus simplex Parent, 1941 | |
| Dactylomyia lateralis Say, 1829 | |
| Diaphorus adustus (Wiedemann, 1830) | ⇒ Diaphorus fuscus Van Duzee, 1921 |
| Diaphorus aldrichi Van Duzee, 1915 | Bolander's yampah |
| Diaphorus alienus Van Duzee, 1915 | Bolander's yampah |
| Diaphorus argentifacies Van Duzee, 1932 | |
| Diaphorus bakeri Robinson, 1967 | Pygmyflower vetch |
| Diaphorus brevinervis Van Duzee, 1924 | Narrow-seeded yampah |
| Diaphorus californicus Van Duzee, 1917 | Red-root yampah |
| Diaphorus consanguineus Harmston & K..., 1963 | Black pepper |
| Diaphorus fuscus Van Duzee, 1921 | Howell's yampah |
| Diaphorus garnetensis Bickel, 2013 | |
| Diaphorus gibbosus Van Duzee, 1915 | Bolander's yampah |
| Diaphorus hirsutus Van Duzee, 1921 | Howell's yampah |
| Diaphorus inornatus Van Duzee, 1917 | Red-root yampah |
| Diaphorus junctus Van Duzee, 1917 | Red-root yampah |
| Diaphorus karijini Bickel, 2013 | |
| Diaphorus lamellatus Loew, 1864 | |
| Diaphorus mundus Loew, 1861 | |
| Diaphorus occidentalis Van Duzee, 1915 | Bolander's yampah |
| Diaphorus parmatus Van Duzee, 1915 | Bolander's yampah |
| Diaphorus parthenus Hardy & Kohn, 1964 | |
| Diaphorus repandus Van Duzee, 1915 | Bolander's yampah |
| Diaphorus snowii Van Duzee, 1917 | Red-root yampah |
| Diaphorus spectabilis Loew, 1861 | |
| Diaphorus spinitalus Van Duzee, 1923 | Lemmon's yampah |
| Diaphorus triangulatus Van Duzee, 1915 | Bolander's yampah |
| Diaphorus usitatus Van Duzee, 1915 | Bolander's yampah |
| Diostracus chaetodactylus Saigusa, 1984 | |
| Diostracus mchughi Harmston, 1966 | Marigold pepper |
| Dolichopus (Dolichopus) annulitarsis Ringdahl, 1920 | |
| Dolichopus (Dolichopus) brevipennis Meigen, 1824 | Prostrate yellowcress |
| Dolichopus (Dolichopus) fraterculus Zetterstedt, 1843 | |
| Dolichopus (Dolichopus) latipennis Fallen, 1823 | |
| Dolichopus (Dolichopus) longicornis Stannius, 1831 | Jointed sandmat |
| Dolichopus (Dolichopus) maculipennis Zetterstedt, 1843 | |
| Dolichopus (Dolichopus) mannerheimi Zetterstedt, 1838 | Narrowflower flaxflower |
| Dolichopus (Dolichopus) plumipes (Scopoli, 1763) | ⇒ Tachytrechus notatus Stannius, 1831 |
| Dolichopus (Dolichopus) remipes Wahlberg, 1839 | Milkwood |
| Dolichopus (Dolichopus) rupestris Haliday, 1833 | Long-legged fly |
| Dolichopus (Dolichopus) stenhammari Zetterstedt, 1843 | Harkness' flaxflower |
| Dolichopus abaftanus Harmston, 1966 | Marigold pepper |
| Dolichopus aboriginis Harmston & K..., 1943 | |
| Dolichopus accidentalis Harmston & K..., 1941 | |
| Dolichopus acricola Van Duzee, 1921 | Howell's yampah |
| Dolichopus adaequatus Van Duzee, 1921 | Howell's yampah |
| Dolichopus adaquatus | |
| Dolichopus aeratus Van Duzee, 1921 | Howell's yampah |
| Dolichopus affictus Osten Sacken, 1877 | Black hawthorn |
| Dolichopus affluens Van Duzee, 1921 | Howell's yampah |
| Dolichopus albertensis Curran, 1922 | |
| Dolichopus aldrichii Wheeler, 1899 | |
| Dolichopus amnicola Melander & B..., 1900 | |
| Dolichopus amphericus Melander & B..., 1900 | |
| Dolichopus amplipenbnis | |
| Dolichopus anacrostichus Frey, 1945 | |
| Dolichopus appendiculatus Van Duzee, 1921 | Howell's yampah |
| Dolichopus argentipes Van Duzee, 1921 | Howell's yampah |
| Dolichopus aurifex Van Duzee, 1921 | Howell's yampah |
| Dolichopus bakeri Cole, 1912 | |
| Dolichopus barbaricus Van Duzee, 1921 | Howell's yampah |
| Dolichopus barbipes Van Duzee, 1921 | Howell's yampah |
| Dolichopus barycnemus Coquillett, 1900 | |
| Dolichopus beatus Van Duzee, 1921 | Howell's yampah |
| Dolichopus bifractus Loew, 1861 | |
| Dolichopus bisetosa | |
| Dolichopus bisetosus Van Duzee, 1921 | Howell's yampah |
| Dolichopus blandus Van Duzee, 1921 | Howell's yampah |
| Dolichopus bruesi Loew, 1862 | Howell's yampah |
| Dolichopus bruneifacies Van Duzee, 1933 | Masterwort |
| Dolichopus brunneus Aldrich, 1893 | |
| Dolichopus californicus Thomson, 1869 | Howell's yampah |
| Dolichopus calvimontis James, 1939 | |
| Dolichopus canadensis Van Duzee, 1921 | Howell's yampah |
| Dolichopus canaliculatus Thomson, 1869 | |
| Dolichopus cavatus Doane, 1899 | Howell's yampah |
| Dolichopus celeripes Van Duzee, 1921 | Howell's yampah |
| Dolichopus compactus Van Duzee, 1921 | Howell's yampah |
| Dolichopus completus Van Duzee, 1921 | Howell's yampah |
| Dolichopus comptus Coquillett, 1899 | Howell's yampah |
| Dolichopus consanguineus Doane, 1899 | |
| Dolichopus conspectus Van Duzee, 1921 | Howell's yampah |
| Dolichopus contiguus Walker, 1849 | Largeflower milkweed |
| Dolichopus convergens Aldrich, 1893 | |
| Dolichopus coquilletti Aldrich, 1893 | |
| Dolichopus corax Osten Sacken, 1877 | |
| Dolichopus crassicornis Aldrich, 1922 | |
| Dolichopus crenatus Osten Sacken, 1877 | Black hawthorn |
| Dolichopus cuprinus Wiedemann, 1830 | Shortstalk false bindweed |
| Dolichopus czekanovskii Stackelberg, 1928 | |
| Dolichopus dasypodus Coquillett, 1910 | |
| Dolichopus detersus Loew, 1866 | Scarlet globemallow |
| Dolichopus diversipennis Curran, 1922 | |
| Dolichopus divigatus Harmston, 1952 | Guyanese pepper |
| Dolichopus elegans Aldrich, 1922 | |
| Dolichopus enigma Melander & B..., 1900 | |
| Dolichopus eudactylus Loew, 1861 | |
| Dolichopus fallax Van Duzee, 1933 | Masterwort |
| Dolichopus flavipes (Stannius, 1831) | ⇒ Dolichopus caligatus Wahlberg, 1850 |
| Dolichopus footei Harmston, 1966 | Marigold pepper |
| Dolichopus formosus Van Duzee, 1921 | Howell's yampah |
| Dolichopus fortis Aldrich, 1922 | |
| Dolichopus frontalis Loew, 1861 | Parish's yampah |
| Dolichopus fucatus Van Duzee, 1921 | Howell's yampah |
| Dolichopus gaigei Steyskal, 1973 | Palmer's ceanothus |
| Dolichopus genualis Van Duzee, 1921 | Howell's yampah |
| Dolichopus grandis Aldrich, 1893 | |
| Dolichopus groenlandicus Zetterstedt, 1843 | |
| Dolichopus hastatus Loew, 1864 | |
| Dolichopus helenae James, 1939 | |
| Dolichopus hirstitarsis Harmston, 1952 | Guyanese pepper |
| Dolichopus hirsutitarsis Harmston, 1952 | |
| Dolichopus humilis Van Duzee, 1921 | Howell's yampah |
| Dolichopus idahoensis Aldrich, 1894 | |
| Dolichopus indegena | |
| Dolichopus inflatus Aldrich, 1922 | |
| Dolichopus interjectus Van Duzee, 1923 | Lemmon's yampah |
| Dolichopus ivanovi Stackelberg, 1929 | |
| Dolichopus jacutensis Stackelberg, 1929 | |
| Dolichopus jugalis Tucker, 1911 | California eryngo |
| Dolichopus kyphotus Harmston, 1966 | Marigold pepper |
| Dolichopus lamellicornis Thomson, 1869 | |
| Dolichopus lamellipes Walker, 1849 | Largeflower milkweed |
| Dolichopus latipes Loew, 1861 | |
| Dolichopus leucacra James, 1939 | |
| Dolichopus litoralis Van Duzee, 1921 | Howell's yampah |
| Dolichopus lobatus Loew, 1861 | |
| Dolichopus longimanus Loew, 1861 | |
| Dolichopus longus Aldrich, 1922 | |
| Dolichopus maculitarsis Van Duzee, 1925 | Oregon yampah |
| Dolichopus magnantenna James, 1939 | |
| Dolichopus manicula Spencer, 1969 | Howell's yampah |
| Dolichopus micropygus Wahlberg, 1851 | Milkwood |
| Dolichopus monarchus Harmston, 1968 | |
| Dolichopus monticola Van Duzee, 1921 | Howell's yampah |
| Dolichopus multisetosa | |
| Dolichopus multisetosus Van Duzee, 1921 | Howell's yampah |
| Dolichopus nigricauda Van Duzee, 1921 | Howell's yampah |
| Dolichopus nigricornis Meigen, 1824 | Prostrate yellowcress |
| Dolichopus nigricoxa Van Duzee, 1926 | Parish's yampah |
| Dolichopus nigrilineatus Van Duzee, 1924 | Narrow-seeded yampah |
| Dolichopus nigrimanus Van Duzee, 1921 | Howell's yampah |
| Dolichopus nigropleurus Harmston, 1966 | Marigold pepper |
| Dolichopus nubifer (Van Duzee, 1921) | ⇒ Dolichopus nubier Van Duzee, 1921 |
| Dolichopus nudus Loew, 1864 | |
| Dolichopus obcordatus Aldrich, 1893 | |
| Dolichopus occidentalis Aldrich, 1893 | |
| Dolichopus omnivagus Van Duzee, 1921 | Howell's yampah |
| Dolichopus opportunus Van Duzee, 1921 | Howell's yampah |
| Dolichopus oregonensis Van Duzee, 1927 | Parish's yampah |
| Dolichopus ovatus Loew, 1861 | |
| Dolichopus paluster Melander & B..., 1900 | |
| Dolichopus partitus Melander & B..., 1900 | |
| Dolichopus parvimanus Van Duzee, 1933 | Masterwort |
| Dolichopus penicillatus Van Duzee, 1921 | Howell's yampah |
| Dolichopus pensus Aldrich, 1922 | |
| Dolichopus pernix Melander & B..., 1900 | |
| Dolichopus perplexus Van Duzee, 1923 | Lemmon's yampah |
| Dolichopus pingreensis James, 1939 | |
| Dolichopus plumitarsis Fallen, 1823 | Long-legged fly |
| Dolichopus plumosus Melander, 1913 | |
| Dolichopus pollex Osten Sacken, 1877 | |
| Dolichopus procerus (Van Duzee, 1921) | ⇒ Dolichopus jugalis Tucker, 1911 |
| Dolichopus ramifer Spencer, 1969 | |
| Dolichopus renidescens Melander & B..., 1900 | |
| Dolichopus robertsoni (Curran, 1923) | ⇒ Dolichopus amnicola Melander & B..., 1900 |
| Dolichopus sagittarius Loew, 1848 | |
| Dolichopus scopifer James, 1939 | |
| Dolichopus sedulus Van Duzee, 1921 | Howell's yampah |
| Dolichopus sexarticulatus Loew, 1864 | |
| Dolichopus shastaensis Harmston, 1966 | Marigold pepper |
| Dolichopus shelfordi Curran, 1934 | California sweetcicely |
| Dolichopus simplicipes Aldrich, 1922 | |
| Dolichopus sincerus Melander, 1900 | Mouseear cress |
| Dolichopus smithae Harmston, 1966 | Marigold pepper |
| Dolichopus solidus Van Duzee, 1921 | Howell's yampah |
| Dolichopus sordidatus Van Duzee, 1921 | Howell's yampah |
| Dolichopus speciosus Hendel, 1920 | Howell's yampah |
| Dolichopus sporadicus Harmston & K..., 1942 | |
| Dolichopus squamicilliatus Harmston, 1966 | Marigold pepper |
| Dolichopus squamosus Van Duzee, 1921 | Howell's yampah |
| Dolichopus subcostatus Van Duzee, 1930 | Parsley |
| Dolichopus sufflavus Van Duzee, 1921 | Howell's yampah |
| Dolichopus superbus Van Duzee, 1921 | Howell's yampah |
| Dolichopus talus Van Duzee, 1921 | Howell's yampah |
| Dolichopus tarsipictis Harmston & K..., 1963 | Black pepper |
| Dolichopus tarsipictus | |
| Dolichopus tenuipes Aldrich, 1894 | |
| Dolichopus terminalis Loew, 1866 | Scarlet globemallow |
| Dolichopus utahensis Harmston & K..., 1943 | |
| Dolichopus uxorcula Van Duzee, 1921 | Howell's yampah |
| Dolichopus varipes Coquillett, 1900 | |
| Dolichopus vegetus Harmston, 1952 | Guyanese pepper |
| Dolichopus vernaae Harmston & K..., 1940 | |
| Dolichopus viridis Van Duzee, 1921 | Howell's yampah |
| Dolichopus walkeri Van Duzee, 1921 | Howell's yampah |
| Dolichopus xanthocnemus Loew, 1864 | |
| Dolichopus zygomus Harmston, 1966 | Marigold pepper |
| Dytomyia flaviseta Bickel, 1994 | |
| Dytomyia tumifrons Bickel, 1994 | |
| Enlinia californica Robinson & A..., 1970 | |
| Erebomyia akidoptera Hurley & Runyon, 2009 | |
| Gymnopternus brevipes Van Duzee, 1933 | |
| Gymnopternus californicus Van Duzee, 1920 | Common yampah |
| Gymnopternus consanguineus Harmston, 1952 | |
| Gymnopternus flavus Loew, 1861 | |
| Gymnopternus lacustris ♰ D. J. Bickel, 1995 | |
| Gymnopternus meniscus Loew, 1864 | |
| Gymnopternus spectabilis Loew, 1861 | |
| Gymnopternus tristis Loew, 1864 | |
| Gymnopternus vanduzeei Curran, 1930 | |
| Hercostmus wasatchensis | |
| Hercostomus albipodus Harmston & K..., 1941 | |
| Hercostomus aurifer Thomson, 1869 | |
| Hercostomus cachae | |
| Hercostomus cacheae Harmston & K..., 1941 | |
| Hercostomus chaetilamellus Harmston & K..., 1941 | |
| Hercostomus coloradensis Harmston, 1952 | Guyanese pepper |
| Hercostomus cryptus Fisher & Orth, 1971 | |
| Hercostomus impudicus Wheeler, 1899 | Heartleaf groundcherry |
| Hercostomus longilamellus Harmston & K..., 1940 | |
| Hercostomus neocryptus Harmston & K..., 1941 | Jamaican pepper |
| Hercostomus nigrifacies Van Duzee, 1933 | Masterwort |
| Hercostomus occidentalis Cole, 1912 | |
| Hercostomus orbicularis Harmston, 1952 | Guyanese pepper |
| Hercostomus purus Harmston & K..., 1963 | Black pepper |
| Hercostomus schlingeri Harmston & K..., 1963 | Black pepper |
| Hercostomus setosus Van Duzee, 1913 | |
| Hercostomus stanfordi Harmston & K..., 1940 | |
| Hercostomus truncatus Harmston & K..., 1940 | |
| Hercostomus unicolor Loew, 1864 | |
| Hercostomus utahensis Harmston & K..., 1940 | |
| Hercostomus wasatchensis Harmston & K..., 1943 | |
| Heteropsilopus brevicornis Macquart, 1850 | |
| Heteropsilopus cingulipes Walker, 1835 | |
| Heteropsilopus trifasciatus Macquart, 1850 | |
| Heteropsilopus venustus Walker, 1852 | |
| Hurleyella salina Runyon, 2019 | |
| Hydatostega argentatus Van Duzee, 1918 | |
| Hydatostega gratiosus Aldrich, 1911 | |
| Hydatostega plumbeus Aldrich, 1911 | |
| Hydraphorus aquatilis | |
| Hydrophorus agalma Wheeler, 1899 | Heartleaf groundcherry |
| Hydrophorus algens Wheeler, 1899 | Heartleaf groundcherry |
| Hydrophorus alpinus Wahlberg, 1844 | |
| Hydrophorus altivagus Aldrich, 1911 | |
| Hydrophorus amplectens Aldrich, 1911 | |
| Hydrophorus ampullaceus Van Duzee, 1924 | Oregon yampah |
| Hydrophorus aquatilis Aldrich, 1922 | |
| Hydrophorus arnaudi Becker, 1904 | Gray alder |
| Hydrophorus brevicauda Van Duzee, 1923 | Lemmon's yampah |
| Hydrophorus breviseta Thomson, 1869 | Filaree |
| Hydrophorus canescens Wheeler, 1896 | Cypresshead groundcherry |
| Hydrophorus canities Van Duzee, 1923 | Lemmon's yampah |
| Hydrophorus chrysologus Walker, 1849 | |
| Hydrophorus claripennis Van Duzee, 1924 | Oregon yampah |
| Hydrophorus dioktes Hurley, 1985 | Gray alder |
| Hydrophorus eldoradensis Wheeler, 1899 | Heartleaf groundcherry |
| Hydrophorus ferruginus Hurley, 1985 | Gray alder |
| Hydrophorus flavihirtus Van Duzee, 1923 | Lemmon's yampah |
| Hydrophorus fumipennis Van Duzee, 1921 | Howell's yampah |
| Hydrophorus glaber Walker, 1849 | |
| Hydrophorus harmstoni Hurley, 1985 | Gray alder |
| Hydrophorus hesperius Hurley, 1985 | Gray alder |
| Hydrophorus innotatus Loew, 1864 | |
| Hydrophorus maculipennis Van Duzee, 1926 | Parish's yampah |
| Hydrophorus magdalenae Wheeler, 1899 | Heartleaf groundcherry |
| Hydrophorus minimus Van Duzee, 1924 | Narrow-seeded yampah |
| Hydrophorus pectinipes Van Duzee, 1923 | Lemmon's yampah |
| Hydrophorus pensus Aldrich, 1911 | |
| Hydrophorus phaeopteryx Hurley, 1985 | |
| Hydrophorus phalarus Hurley, 1985 | Gray alder |
| Hydrophorus philombrius Wheeler, 1890 | Coastal groundcherry |
| Hydrophorus phoca Aldrich, 1911 | |
| Hydrophorus pilitarsis Malloch, 1919 | |
| Hydrophorus praecox Lehmann, 1822 | |
| Hydrophorus signifer (Coquillett, 1899) | ⇒ Hydrophorus signiferus Coquillett, 1899 |
| Hydrophorus signiferus Coquillett, 1899 | |
| Hydrophorus sodalis Wheeler, 1899 | Heartleaf groundcherry |
| Hydrophorus trichaspis Hurley, 1985 | Gray alder |
| Hydrophorus viridifacies Van Duzee, 1923 | Lemmon's yampah |
| Hygrocelenthus afflictus | |
| Lamprochromus occidentalis Robinson, 1967 | Pygmyflower vetch |
| Liancalus hydrophilus Aldrich, 1893 | |
| Liancalus limbatus Osten Sacken, 1917 | Red-root yampah |
| Liancalus pterodactyl Runyon & Hurley, 2015 | |
| Liancalus querulus Osten Sacken, 1877 | |
| Liancalus similis Aldrich, 1893 | |
| Medetera abstrusa Thuneberg, 1955 | |
| Medetera aldrichii Wheeler, 1899 | Heartleaf groundcherry |
| Medetera alpina Harmston & K..., 1941 | |
| Medetera apicalis (Zetterstedt, 1843) | ⇒ Medetera abstrusa Thuneberg, 1955 |
| Medetera arnaudi Harmston, 1951 | Higuillo |
| Medetera californiensis Wheeler, 1899 | Heartleaf groundcherry |
| Medetera crassivenis Curran, 1928 | |
| Medetera cyanogaster Wheeler, 1899 | Heartleaf groundcherry |
| Medetera diadema Linnaeus, 1767 | |
| Medetera dorycondylus Bickel, 1985 | |
| Medetera falcata Van Duzee, 1919 | Gairdner's yampah |
| Medetera flinflon Bickel, 1985 | |
| Medetera johnthomasi Bickel & Arnaud, 2011 | |
| Medetera junensis Bickel, 2013 | |
| Medetera longinervis Van Duzee, 1928 | Parish's yampah |
| Medetera maura Adams, 1904 | Heartleaf groundcherry |
| Medetera nigrohalterata Parent, 1932 | |
| Medetera petulca Wheeler, 1899 | Heartleaf groundcherry |
| Medetera physothrix Bickel, 1985 | |
| Medetera platythrix Bickel, 1985 | |
| Medetera postminina Steyskal, 1967 | |
| Medetera potomac Bickel, 1985 | |
| Medetera signaticornis Loew, 1857 | |
| Medetera truncorum Meigen, 1824 | Prostrate yellowcress |
| Medetera utahensis Bickel, 1985 | |
| Medetera veles Loew, 1861 | |
| Medetera vidua Wheeler, 1899 | Heartleaf groundcherry |
| Medetera vittata Van Duzee, 1919 | Gairdner's yampah |
| Medetera vockerothi Bickel, 1985 | |
| Medetera walschaertsi Gosseries, 1989 | |
| Megistostylus longicornis Fabricius, 1775 | |
| Melanderia californica Harmston, 1972 | Spanish elder |
| Melanderia crepuscula Arnaud, 1958 | |
| Melanderia curvipes Van Duzee, 1918 | |
| Melanderia mandibulata Aldrich, 1922 | |
| Mesorhaga cocori Bickel, 2007 | |
| Mesorhaga emmensis Bickel, 1994 | |
| Mesorhaga flavicoma Bickel, 1994 | |
| Mesorhaga longipenis Bickel, 1994 | |
| Mesorhaga martius Bickel, 1994 | |
| Mesorhaga naumanni Bickel, 1994 | |
| Mesorhaga nerrensis Bickel, 1994 | |
| Mesorhaga nigripes Aldrich, 1893 | |
| Mesorhaga similis Bickel, 1994 | |
| Mesorhaga turneri Bickel, 1994 | |
| Micromorphus canadensis Van Duzee, 1917 | |
| Micromorphus knowltoni Robinson, 1967 | Pygmyflower vetch |
| Micromorphus leucostoma Robinson, 1967 | Pygmyflower vetch |
| Microphor armipes Melander, 1927 | |
| Microphor atratus Coquillett, 1900 | |
| Microphor cirripes Melander, 1940 | |
| Microphor discalis Melander, 1940 | |
| Microphor evisceratus Melander, 1940 | |
| Microphor isommatus Melander, 1927 | |
| Microphor ravidus Coquillett, 1895 | |
| Microphor ravus Melander, 1940 | |
| Microphor strigilifer Melander, 1940 | |
| Microphor sycophantor Melander, 1902 | |
| Microphor tacomae Melander, 1940 | |
| Microphorella acroptera Melander, 1928 | |
| Microphorella aeroptera | |
| Microphorella chiragra Melander, 1928 | |
| Microphorella longitarsis Melander, 1928 | |
| Microphorella ornatipes Melander, 1928 | |
| Microphorella tubifera Melander, 1928 | |
| Microphorus armipes (Melander, 1928) | ⇒ Microphor armipes Melander, 1927 |
| Microphorus atratus (Coquillett, 1900) | ⇒ Microphor atratus Coquillett, 1900 |
| Microphorus cirripes (Melander, 1940) | ⇒ Microphor cirripes Melander, 1940 |
| Microphorus evisceratus (Melander, 1940) | ⇒ Microphor evisceratus Melander, 1940 |
| Microphorus ravidus (Coquillett, 1895) | ⇒ Microphor ravidus Coquillett, 1895 |
| Microphorus strigilifer (Melander, 1940) | ⇒ Microphor strigilifer Melander, 1940 |
| Microphorus sycophantor Melander, 1902 | |
| Narrabeenia spinipes Bickel, 1994 | |
| Neoparentia caudatus Van Duzee, 1917 | |
| Nepalomyia hesperia Runyon & Hurley, 2003 | |
| Neurigona albospinosa Van Duzee, 1913 | Bolander's yampah |
| Neurigona bivittata Van Duzee, 1913 | Bolander's yampah |
| Neurigona californica Harmston, 1972 | Spanish elder |
| Neurigona ciliata Van Duzee, 1913 | Bolander's yampah |
| Neurigona dimidiata Loew, 1861 | |
| Neurigona flava Van Duzee, 1913 | Bolander's yampah |
| Neurigona lienosa Wheeler, 1899 | Heartleaf groundcherry |
| Neurigona maculata Van Duzee, 1913 | Bolander's yampah |
| Neurigona magnipalpa Naglis, 2003 | |
| Neurigona tenuis Loew, 1864 | |
| Neurigona torrida Harmston, 1951 | Higuillo |
| Neurigona transversa Van Duzee, 1913 | Bolander's yampah |
| Neurigona tridens Van Duzee, 1913 | Bolander's yampah |
| Neurigona zionensis Harmston & K..., 1942 | |
| Nothorhaphium aemulans Becker, 1922 | |
| Nothorhaphium callosum Bickel, 1999 | |
| Nothorhaphium nudicorne Bickel, 1999 | |
| Paraclius magnicornis Van Duzee, 1927 | Parish's yampah |
| Paraclius manglar Bickel, 2013 | |
| Paraclius nigrocaudatus Van Duzee, 1918 | Common yampah |
| Paraclius obtusus Hardy, 1939 | |
| Paraclius trisetosus Parent, 1933 | |
| Paraclius utahensis Harmston & K..., 1946 | |
| Paraphroslus nigripennis | |
| Parasyntormon appendiculatum Harmston & K..., 1943 | |
| Parasyntormon asellus Wheeler, 1899 | Heartleaf groundcherry |
| Parasyntormon classicum Harmston & K..., 1943 | |
| Parasyntormon emarginatum Wheeler, 1899 | Heartleaf groundcherry |
| Parasyntormon flavicoxa Van Duzee, 1922 | Kellogg's yampah |
| Parasyntormon fraterculus Van Duzee, 1922 | Kellogg's yampah |
| Parasyntormon hendersoni Harmston & K..., 1939 | |
| Parasyntormon hinnulus Wheeler, 1899 | Heartleaf groundcherry |
| Parasyntormon lagotis Wheeler, 1899 | Heartleaf groundcherry |
| Parasyntormon lepus Van Duzee, 1918 | Common yampah |
| Parasyntormon longicorne Van Duzee, 1933 | Masterwort |
| Parasyntormon montivagum Wheeler, 1899 | Heartleaf groundcherry |
| Parasyntormon mulinum Van Duzee, 1922 | Kellogg's yampah |
| Parasyntormon nigripes Harmston & K..., 1943 | |
| Parasyntormon occidentale Aldrich, 1894 | |
| Parasyntormon petiolatum Malloch, 1921 | Masterwort |
| Parasyntormon utahnum Van Duzee, 1933 | Masterwort |
| Parasyntormon virens Harmston & K..., 1943 | |
| Parathalassius abela Brooks & Cum..., 2017 | |
| Parathalassius aldrichi Melander, 1906 | Common sandweed |
| Parathalassius candidatus Melander, 1906 | Common sandweed |
| Parathalassius dilatus Brooks & Cum..., 2017 | |
| Parathalassius infuscatus Brooks & Cum..., 2017 | |
| Parathalassius melanderi Cole, 1912 | |
| Parathalassius midas Brooks & Cum..., 2017 | |
| Parathalassius sinclairi Brooks & Cum..., 2017 | |
| Parathalassius socali Brooks & Cum..., 2017 | |
| Parathalassius susanae Brooks & Cum..., 2017 | |
| Parathalassius uniformus Cumming, 2017 | |
| Parathalassius wheeleri Brooks & Cum..., 2017 | |
| Parentia barbarae Bickel, 1994 | |
| Parentia caldyanup Bickel, 1994 | |
| Parentia chaineyi Bickel, 1994 | |
| Parentia dispar Macquart, 1850 | |
| Parentia dongara Bickel, 1994 | |
| Parentia gemmans Walker, 1849 | |
| Parentia kelseyi Bickel, 1994 | |
| Parentia nudicosta Bickel, 1994 | |
| Parentia occidentalis Bickel, 1994 | |
| Parentia perthensis Bickel, 1994 | |
| Parentia solaris Bickel, 1994 | |
| Parentia timothyi Bickel, 1994 | |
| Parentia vulgaris Bickel, 1994 | |
| Parentia yarragil Bickel, 1994 | |
| Parentia yunensis Bickel, 1994 | |
| Pelastoneurus abbreviatus Loew, 1864 | |
| Pelastoneurus aldrichi Van Duzee, 1923 | Lemmon's yampah |
| Pelastoneurus barri Harmston, 1972 | Spanish elder |
| Pelastoneurus comatus Robinson, 1992 | |
| Pelastoneurus cyaneus Wheeler, 1899 | Heartleaf groundcherry |
| Pelastoneurus latifacies Van Duzee, 1930 | Parsley |
| Pelastoneurus longicauda Loew, 1861 | |
| Pelastoneurus occidentalis Malloch, 1920 | Heartleaf groundcherry |
| Pelastoneurus potomacus Robinson, 1992 | |
| Pelastoneurus tibialis Van Duzee, 1923 | Lemmon's yampah |
| Pelastoneurus vagans Loew, 1861 | |
| Pelastoneurus wheeleri Melander, 1900 | Mouseear cress |
| Peloropeodes acuticornis Van Duzee, 1926 | |
| Peloropeodes aldrichi Robinson, 1970 | Purple broad vetch |
| Peloropeodes apicales Harmston & K..., 1946 | Pepper |
| Peloropeodes cornuta Van Duzee, 1926 | |
| Peloropeodes cornutus Van Duzee, 1926 | |
| Peloropeodes fuscipes Van Duzee, 1926 | |
| Phrudoneura collessi Bickel, 2013 | |
| Pilbara octava Bickel, 1994 | |
| Pseudoparentia caniculata Bickel, 2014 | |
| Pseudoparentia niharae Bickel, 2013 | |
| Pseudoparentia nullaborensis Bickel, 1994 | |
| Rhaphium aequale Van Duzee, 1927 | Parish's yampah |
| Rhaphium albibarbum Van Duzee, 1924 | |
| Rhaphium aldrichi Van Duzee, 1922 | |
| Rhaphium beringiense Negrobov & V..., 1985 | Sandia Mountain primrose |
| Rhaphium boreale Van Duzee, 1923 | |
| Rhaphium brachyceras Meuffels & G..., 1999 | |
| Rhaphium brevicorne Curtis, 1835 | |
| Rhaphium coloradense Curran, 1926 | |
| Rhaphium colute Harmston & J..., 1942 | Viper peperomia |
| Rhaphium colutis Harmston & J..., 1942 | |
| Rhaphium crassipes Meigen, 1824 | |
| Rhaphium discolor Zetterstedt, 1838 | Narrowflower flaxflower |
| Rhaphium elegantulum Meigen, 1824 | |
| Rhaphium femoratum Van Duzee, 1922 | |
| Rhaphium firsovi Stackelberg ..., 1976 | |
| Rhaphium hirtimanum Van Duzee, 1933 | Masterwort |
| Rhaphium longipalpe Curran, 1926 | |
| Rhaphium longipalpis Curran, 1926 | |
| Rhaphium montanum Huckett, 1965 | |
| Rhaphium nasutum Fallen, 1823 | Blind's bryum moss |
| Rhaphium nigribarbatum Becker, 1900 | |
| Rhaphium nigrociliatum Curran, 1926 | |
| Rhaphium nigrovittatum Curran, 1926 | |
| Rhaphium nigrum Van Duzee, 1923 | |
| Rhaphium nudum Van Duzee, 1924 | |
| Rhaphium obtusum Van Duzee, 1928 | Parish's yampah |
| Rhaphium pollex Van Duzee, 1922 | |
| Rhaphium robustum Curran, 1926 | |
| Rhaphium simplicipes Curran, 1926 | |
| Rhaphium slossonae Johnson, 1906 | |
| Rhaphium spinitarse Curran, 1924 | |
| Rhaphium subfurcatum Van Duzee, 1932 | |
| Rhaphium temerarium Becker, 1922 | |
| Rhaphium terminale Van Duzee, 1924 | |
| Rhaphium triangulatum Van Duzee, 1922 | |
| Rhaphium tricaudatum Van Duzee, 1923 | |
| Scellus amplus Curran, 1923 | |
| Scellus asaroticus Hurley, 1995 | |
| Scellus avidus Loew, 1864 | |
| Scellus coloradensis Harmston & J..., 1942 | |
| Scellus crinipes Van Duzee, 1925 | Oregon yampah |
| Scellus dyscritus Hurley, 1995 | |
| Scellus filifer Loew, 1864 | |
| Scellus knowltoni Harmston, 1939 | Moth pepper |
| Scellus spinimanus Zetterstedt, 1843 | |
| Scellus varipennis Van Duzee, 1925 | Oregon yampah |
| Scellus vigil Osten Sacken, 1877 | |
| Scellus virago Aldrich, 1907 | |
| Schistostoma yakimensis | |
| Sympycnidelphus californicus Harmston, 1968 | |
| Sympycnus aurifacies Van Duzee, 1923 | Lemmon's yampah |
| Sympycnus binodatus Harmston & K..., 1940 | |
| Sympycnus brevicentris Van Duzee, 1930 | Parsley |
| Sympycnus calcaratus (Van Duzee, 1930) | ⇒ Sympycnus magellanicus Robinson, 1970 |
| Sympycnus cilifemoratus Parent, 1932 | |
| Sympycnus clavatus Van Duzee, 1913 | Bolander's yampah |
| Sympycnus clavicornis Van Duzee, 1930 | Parsley |
| Sympycnus cuprinus Wheeler, 1899 | Heartleaf groundcherry |
| Sympycnus distortus Van Duzee, 1930 | Parsley |
| Sympycnus fasciventris Van Duzee, 1917 | Red-root yampah |
| Sympycnus globulicauda Van Duzee, 1930 | Parsley |
| Sympycnus hardyi Harmston & K..., 1940 | |
| Sympycnus inaequalis Van Duzee, 1930 | Parsley |
| Sympycnus inornatus Van Duzee, 1917 | |
| Sympycnus insolitus Van Duzee, 1932 | |
| Sympycnus isoaristus Harmston & K..., 1940 | |
| Sympycnus laevigatus Van Duzee, 1930 | Parsley |
| Sympycnus latitarsis Van Duzee, 1930 | Parsley |
| Sympycnus magellanicus Robinson, 1970 | |
| Sympycnus marcidus Wheeler, 1899 | Heartleaf groundcherry |
| Sympycnus minuticornis Van Duzee, 1932 | |
| Sympycnus montanus Van Duzee, 1930 | Parsley |
| Sympycnus monticola Van Duzee, 1932 | |
| Sympycnus oreas Wheeler, 1899 | |
| Sympycnus pennarista Parker, 1919 | |
| Sympycnus pictipes Harmston & K..., 1940 | |
| Sympycnus pugil Wheeler, 1899 | Heartleaf groundcherry |
| Sympycnus pulvillus Reinhard, 1947 | Parsley |
| Sympycnus sobrinus Wheeler, 1899 | |
| Sympycnus tertianus Loew, 1864 | |
| Sympycnus tripilus Van Duzee, 1930 | Parsley |
| Sympycnus utahensis Harmston & K..., 1939 | |
| Synarthrus palmaris Loew, 1864 | |
| Syntormon affine Coquillett, 1897 | |
| Syntormon bisinuatum Van Duzee, 1925 | Oregon yampah |
| Syntormon californicum Harmston, 1951 | Higuillo |
| Syntormon clavatum Van Duzee, 1925 | Oregon yampah |
| Syntormon dissimilipes Van Duzee, 1925 | Oregon yampah |
| Syntormon kennedyi Harmston & K..., 1942 | |
| Syntormon myklebusti Harmston & M..., 1966 | |
| Syntormon oregonense Hamrston & K..., 1942 | |
| Syntormon oregonensis Harmston & K..., 1942 | |
| Syntormon palmare Loew, 1864 | |
| Syntormon strataegum Wheeler, 1899 | |
| Syntormon tricoloripes Curran, 1923 | |
| Syntormon uintaense Harmston & K..., 1940 | |
| Syntormon uintaensis Harmston & K..., 1940 | |
| Syntormon utahense Harmston & K..., 1942 | |
| Syntormon utahensis Harmston & K..., 1942 | |
| Syntormon variegatum Harmston, 1952 | Guyanese pepper |
| Syntormon xiphandroides Parent, 1932 | |
| Systenus californicus Harmston, 1968 | |
| Systenus curryi Bickel, 1986 | |
| Tachytrechaus utahensis | |
| Tachytrechus augustipennis Loew, 1862 | |
| Tachytrechus auratus Aldrich, 1896 | |
| Tachytrechus binodatus Loew, 1866 | Scarlet globemallow |
| Tachytrechus bipunctatus (Macquart, 1842) | ⇒ Tachytrechus greeni Foote, Couls..., 1965 |
| Tachytrechus boharti Harmston, 1968 | |
| Tachytrechus californicus Harmston & K..., 1943 | |
| Tachytrechus canacolli Brooks, 2004 | |
| Tachytrechus castus Wheeler, 1899 | |
| Tachytrechus duplicatus Harmston, 1972 | Spanish elder |
| Tachytrechus flabellifer Osten Sacken, 1877 | |
| Tachytrechus granditarsis Greene, 1922 | Marginal woodfern |
| Tachytrechus granditarsus | |
| Tachytrechus greenei Foote & Coulson, 1965 | |
| Tachytrechus harmstoni Meuffels & G..., 1999 | |
| Tachytrechus mchughi Harmston, 1972 | Spanish elder |
| Tachytrechus milleri Harmston, 1966 | Marigold pepper |
| Tachytrechus nimius Aldrich, 1901 | |
| Tachytrechus olympiae Aldrich, 1896 | |
| Tachytrechus sanus Osten Sacken, 1877 | |
| Tachytrechus simulatus Greene, 1922 | Marginal woodfern |
| Tachytrechus spinitarsis Van Duzee, 1924 | |
| Tachytrechus tahoensis Harmston & K..., 1940 | |
| Tachytrechus tenuiseta Greene, 1922 | Marginal woodfern |
| Tachytrechus utahensis Harmston & K..., 1940 | |
| Tachytrechus vorax Loew, 1861 | |
| Teuchophorus diminucosta Harmston & K..., 1942 | |
| Teuchophorus utahensis Harmston & K..., 1942 | |
| Thinophilus (Schoenophilus) splendens Grootaert & ..., 1984 | |
| Thinophilus (Thinophilus) eboricoxa Bickel, 2013 | |
| Thinophilus (Thinophilus) yaraloola Bickel, 2014 | |
| Thinophilus depressus Van Duzee, 1926 | Parish's yampah |
| Thinophilus indigenus Becker, 1902 | |
| Thinophilus insulanus Van Duzee, 1926 | Parish's yampah |
| Thinophilus latimanus Van Duzee, 1926 | Parish's yampah |
| Thinophilus olga Aldrich, 1911 | |
| Thinophilus pectinifer Wheeler, 1896 | Cypresshead groundcherry |
| Thinophilus pruinosus Van Duzee, 1930 | Parsley |
| Thinophilus rufibarbis Van Duzee, 1926 | Parish's yampah |
| Thinophilus scopiventris Harmston & K..., 1940 | |
| Thinophilus spinipes Van Duzee, 1926 | Parish's yampah |
| Thrypticus bicolor Macquart, 1827 | |
| Thrypticus fortescuensis Bickel, 1986 | |
| Thrypticus fraterculus Wheeler, 1890 | |
| Thrypticus longicauda Ouchi, 1938 | Howell's yampah |
| Thrypticus nigripes Enderlein, 1914 | Howell's yampah |
| Thrypticus willistoni Wheeler, 1890 | |
