| Brochella monticola Melander, 1928 | |
| Empis (Anacrostichus) spectabilis Loew, 1862 | Jone's globemallow |
| Empis (Coptophlebia) clausa Coquillett, 1895 | |
| Empis (Enoplempis) geneatis Melander, 1902 | |
| Empis (Enoplempis) leptogastra Loew, 1863 | Copper mallow |
| Empis (Enoplempis) snoddyi Steyskal, 1969 | |
| Empis (Enoplempis) tridentata Coquillett, 1901 | |
| Empis (Euempis) montiradicis James, 1942 | |
| Empis (Lissempis) liosoma Bezzi, 1909 | |
| Empis abcirus Walker, 1849 | Largeflower milkweed |
| Empis aeripes Melander, 1902 | |
| Empis aerobatica Melander, 1902 | |
| Empis agasthus Walker, 1849 | Largeflower milkweed |
| Empis aldrichii Melander, 1902 | |
| Empis amytis Walker, 1849 | Largeflower milkweed |
| Empis anthophila Melander, 1946 | |
| Empis armipes Loew, 1861 | |
| Empis arthrica Melander, 1902 | |
| Empis asema Melander, 1902 | |
| Empis barbatoides Melander, 1965 | |
| Empis bigoti Melander, 1902 | |
| Empis brachysoma Coquillett, 1900 | |
| Empis brevis Loew, 1862 | |
| Empis browni Curran, 1931 | |
| Empis brunnea Coquillett, 1903 | |
| Empis bullifera Kessel & Kessel, 1951 | Miner's lettuce |
| Empis cacuminifer Melander, 1902 | |
| Empis caeligena Melander, 1902 | |
| Empis canaster Melander, 1902 | |
| Empis captus Coquillett, 1895 | |
| Empis colonica Walker, 1849 | Largeflower milkweed |
| Empis comantis (Coquillett, 1895) | ⇒ Empis cometes Steyskal, 1965 |
| Empis cometes Steyskal, 1965 | Bolinas ceanothus |
| Empis compta Coquillett, 1895 | |
| Empis ctenocnema Melander, 1945 | Mediterranean cabbage |
| Empis dactylica Melander, 1946 | |
| Empis delumbis Melander, 1965 | |
| Empis desiderata Melander, 1965 | |
| Empis deterra Walley, 1927 | Wheel milkweed |
| Empis distans Loew, 1869 | Juniper globemallow |
| Empis dolabraria Melander, 1902 | Szowits' madwort |
| Empis enodis Melander, 1902 | |
| Empis eudamides Walker, 1849 | Largeflower milkweed |
| Empis exilis ♰ Coquillett, 1903 | |
| Empis falcata Melander, 1902 | |
| Empis frontalis Coquillett, 1903 | |
| Empis fumida Coquillett, 1900 | |
| Empis gladiator Melander, 1902 | |
| Empis gulosa Coquillett, 1895 | |
| Empis hirticrus Melander, 1928 | |
| Empis humilis Coquillett, 1895 | |
| Empis infumata (Coquillett, 1900) | ⇒ Empis liosoma Bezzi, 1909 |
| Empis johnsoni Melander, 1902 | |
| Empis labiata Loew, 1861 | |
| Empis laevigata Loew, 1864 | |
| Empis laniventris Eschscholtz, 1823 | |
| Empis latrappensis Ouellet, 1942 | Plumleaf hawthorn |
| Empis levicula Coquillett, 1895 | |
| Empis longeoblita Steyskal, 1965 | Bolinas ceanothus |
| Empis loripedis Coquillett, 1895 | |
| Empis manca Coquillett, 1895 | |
| Empis melanderi Arnaud & Bir..., 1966 | |
| Empis mira Bigot, 1880 | |
| Empis mixopolia Melander, 1902 | |
| Empis neomexicana Melander, 1902 | |
| Empis nodipoplitea Steyskal, 1965 | Bolinas ceanothus |
| Empis nuda Loew, 1862 | Jone's globemallow |
| Empis obesa Loew, 1861 | |
| Empis ollius Walker, 1849 | Largeflower milkweed |
| Empis otiosa Coquillett, 1895 | |
| Empis pallida Loew, 1861 | |
| Empis pellucida Coquillett, 1900 | |
| Empis peregrina Melander, 1902 | |
| Empis plectrum Melander, 1946 | |
| Empis podagra Melander, 1902 | |
| Empis poeciloptera Loew, 1861 | |
| Empis poplitea Loew, 1863 | |
| Empis pudica Loew, 1861 | |
| Empis reciproca Walker, 1857 | Indian milkweed |
| Empis rufescens (Loew, 1864) | ⇒ Empis colonica Walker, 1849 |
| Empis scatophagina Melander, 1902 | |
| Empis scoparia Coquillett, 1903 | |
| Empis sordida Loew, 1861 | |
| Empis stenoptera Loew, 1864 | |
| Empis subinfumata Malloch, 1923 | Laysan bur cucumber |
| Empis tenebrosa (Coquillett, 1895) | ⇒ Empis hirticrus Melander, 1928 |
| Empis teres Melander, 1902 | |
| Empis tersa Coquillett, 1895 | |
| Empis vaginifer Melander, 1902 | |
| Empis valentis Coquillett, 1895 | |
| Empis varipes Loew, 1861 | |
| Empis virgata Coquillett, 1895 | |
| Hesperempis mabelae Melander, 1902 | |
| Hesperempis sanduca Melander, 1928 | |
| Hilara argyrata Curran, 1930 | |
| Hilara atra Loew, 1862 | Jone's globemallow |
| Hilara aurata Coquillett, 1900 | |
| Hilara auripila Curran, 1926 | |
| Hilara baculifer Melander, 1902 | |
| Hilara basalis Loew, 1862 | Jone's globemallow |
| Hilara bella Melander, 1902 | |
| Hilara brevipila Loew, 1862 | Jone's globemallow |
| Hilara cana Coquillett, 1895 | |
| Hilara carbonaria Melander, 1902 | |
| Hilara cavernicola Melander, 1945 | Mediterranean cabbage |
| Hilara congregaria Melander, 1902 | |
| Hilara crickmayi Curran, 1926 | |
| Hilara dixi Steyskal, 1969 | |
| Hilara femorata Loew, 1862 | Jone's globemallow |
| Hilara garretti Curran, 1926 | |
| Hilara gracilis Loew, 1862 | Jone's globemallow |
| Hilara granditarsis Curran, 1926 | |
| Hilara johnsoni Coquillett, 1895 | |
| Hilara juno Curran, 1930 | |
| Hilara leucoptera Loew, 1862 | Jone's globemallow |
| Hilara lutea Loew, 1863 | Copper mallow |
| Hilara macroptera Loew, 1863 | Copper mallow |
| Hilara migrata (Walker, 1849) | ⇒ Iteaphila nitidula Zetterstedt, 1838 |
| Hilara mutabilis Loew, 1862 | Jone's globemallow |
| Hilara nearctica Shewell, 1955 | |
| Hilara nigriventris Loew, 1862 | Jone's globemallow |
| Hilara nugax Melander, 1902 | |
| Hilara plebeia Walker, 1857 | Indian milkweed |
| Hilara quadrivittata Meigen, 1822 | Dance fly |
| Hilara rufopuncta Curran, 1926 | |
| Hilara seriata Loew, 1864 | |
| Hilara testacea Loew, 1864 | |
| Hilara transfuga (Walker, 1849) | ⇒ Iteaphila macquarti Zetterstedt, 1838 |
| Hilara tristis Loew, 1864 | |
| Hilara trivittata Loew, 1862 | Jone's globemallow |
| Hilara umbrosa Loew, 1862 | Jone's globemallow |
| Hilara unicolor Loew, 1862 | Jone's globemallow |
| Hilara varipennis Curran, 1930 | |
| Hilara velutina Loew, 1862 | Jone's globemallow |
| Hilara wheeleri Melander, 1901 | |
| Philetus memorandus Melander, 1928 | |
| Philetus schizophorus Melander, 1928 | |
| Rhamphomyia (Eorhamphomyia) sudigeronis Coquillett, 1895 | |
| Rhamphomyia (Pararhamphomyia) albipennis Fallen, 1816 | |
| Rhamphomyia (Pararhamphomyia) aperta Loew, 1862 | Butte County checkerbloom |
| Rhamphomyia (Pararhamphomyia) barbata Macquart, 1823 | |
| Rhamphomyia (Pararhamphomyia) filicauda Henriksen & ..., 1917 | Cooley's meadow-rue |
| Rhamphomyia (Pararhamphomyia) hirtula Zetterstedt, 1842 | San Bernardino Mountain gilia |
| Rhamphomyia (Rhamphomyia) beckeriella Chvala, 1985 | |
| Rhamphomyia (Rhamphomyia) crinita Becker, 1887 | |
| Rhamphomyia (Rhamphomyia) nigrita (Zetterstedt, 1838) | ⇒ Rhamphomyia sudigeronis Coquillett, 1895 |
| Rhamphomyia (Rhamphomyia) plumipes Meigen, 1804 | |
| Rhamphomyia adversa Coquillett, 1900 | |
| Rhamphomyia agasicles Walker, 1849 | |
| Rhamphomyia albata Coquillett, 1902 | |
| Rhamphomyia albopilosa Coquillett, 1900 | |
| Rhamphomyia ambocnema Chillcott, 1959 | |
| Rhamphomyia americana Wiedemann, 1830 | Shortstalk false bindweed |
| Rhamphomyia amplicella Coquillett, 1895 | |
| Rhamphomyia amplipedis Coquillett, 1895 | |
| Rhamphomyia anaxo (Walker, 1849) | ⇒ Rhamphomyia phemius Walker, 1849 |
| Rhamphomyia angustipennis (Loew, 1861) | ⇒ Rhamphomyia beckeriella Chvala, 1985 |
| Rhamphomyia anthracodes Coquillett, 1900 | |
| Rhamphomyia arctotibia Chillcott, 1959 | |
| Rhamphomyia arcuata Coquillett, 1895 | |
| Rhamphomyia atrata Coquillett, 1900 | |
| Rhamphomyia avida (Coquillett, 1895) | ⇒ Rhamphomyia aperta Loew, 1862 |
| Rhamphomyia barypoda Coquillett, 1900 | |
| Rhamphomyia basalis (Loew, 1864) | ⇒ Rhamphomyia crinita Becker, 1887 |
| Rhamphomyia bifilata Coquillett, 1895 | |
| Rhamphomyia bigelowi Walley, 1927 | Wheel milkweed |
| Rhamphomyia birdi Curran, 1929 | |
| Rhamphomyia borealis Fabricius, 1780 | |
| Rhamphomyia brevis Loew, 1861 | |
| Rhamphomyia californica Coquillett, 1895 | |
| Rhamphomyia calvimontis Cockerell, 1916 | |
| Rhamphomyia candicans Loew, 1864 | |
| Rhamphomyia ciliata Coquillett, 1895 | |
| Rhamphomyia cilipes (Say, 1823) | ⇒ Rhamphomyia plumipes Meigen, 1804 |
| Rhamphomyia cinefacta Coquillett, 1900 | |
| Rhamphomyia cineracea Coquillett, 1900 | |
| Rhamphomyia clauda Coquillett, 1901 | |
| Rhamphomyia clavator Coquillett, 1901 | |
| Rhamphomyia clavigera Loew, 1861 | |
| Rhamphomyia colorata Coquillett, 1895 | |
| Rhamphomyia compta (Coquillett, 1895) | ⇒ Rhamphomyia barbata Macquart, 1823 |
| Rhamphomyia conjuncta Loew, 1861 | |
| Rhamphomyia conservativa Malloch, 1919 | |
| Rhamphomyia cophas Walker, 1849 | Largeflower milkweed |
| Rhamphomyia currani Steyskal, 1964 | Martin's ceanothus |
| Rhamphomyia curvipes Coquillett, 1904 | |
| Rhamphomyia dana Walker, 1849 | Largeflower milkweed |
| Rhamphomyia daria Walker, 1849 | Largeflower milkweed |
| Rhamphomyia dasypoda Steyskal, 1964 | Martin's ceanothus |
| Rhamphomyia debilis Loew, 1861 | |
| Rhamphomyia dimidiata Loew, 1861 | |
| Rhamphomyia disconcerta Curran, 1930 | |
| Rhamphomyia disparilis Coquillett, 1900 | |
| Rhamphomyia diversa Coquillett, 1901 | |
| Rhamphomyia duplicis Coquillett, 1895 | |
| Rhamphomyia ecetra Walker, 1849 | Largeflower milkweed |
| Rhamphomyia effera Coquillett, 1895 | |
| Rhamphomyia erinacioides Malloch, 1919 | |
| Rhamphomyia exigua Loew, 1862 | Jone's globemallow |
| Rhamphomyia expulsa (Walker, 1857) | ⇒ Bicellaria expulsa Walker, 1857 |
| Rhamphomyia falcipedia Chillcott, 1959 | |
| Rhamphomyia ficana (Walker, 1849) | ⇒ Empis agasthus Walker, 1849 |
| Rhamphomyia fimbriata Coquillett, 1895 | |
| Rhamphomyia flavirostris Walker, 1849 | Largeflower milkweed |
| Rhamphomyia flexuosa Coquillett, 1895 | |
| Rhamphomyia formosula Melander, 1965 | |
| Rhamphomyia frontalis Loew, 1862 | Jone's globemallow |
| Rhamphomyia fumosa Loew, 1861 | |
| Rhamphomyia gilvipes Loew, 1861 | |
| Rhamphomyia gilvipilosa Coquillett, 1895 | |
| Rhamphomyia glabra Loew, 1861 | |
| Rhamphomyia glauca Coquillett, 1900 | |
| Rhamphomyia gracilis (Loew, 1861) | ⇒ Rhamphomyia daria Walker, 1849 |
| Rhamphomyia herschelli Malloch, 1919 | |
| Rhamphomyia hirticula Collin, 1937 | |
| Rhamphomyia hirtipes Loew, 1864 | |
| Rhamphomyia hoelsi Frey, 1950 | |
| Rhamphomyia hovgaardii Holmgren, 1880 | West Indian false nettle |
| Rhamphomyia impedita Loew, 1862 | Jone's globemallow |
| Rhamphomyia incompleta Loew, 1863 | Copper mallow |
| Rhamphomyia insecta Coquillett, 1895 | |
| Rhamphomyia intonsa Steyskal, 1964 | Martin's ceanothus |
| Rhamphomyia irregularis (Loew, 1864) | ⇒ Rhamphomyia hirtipes Loew, 1864 |
| Rhamphomyia jubata Chillcott, 1959 | |
| Rhamphomyia laevigata Loew, 1861 | |
| Rhamphomyia leucoptera Loew, 1861 | |
| Rhamphomyia limata Coquillett, 1900 | |
| Rhamphomyia limbata Loew, 1861 | |
| Rhamphomyia liturata (Loew, 1861) | ⇒ Rhamphomyia longipennis Loew, 1861 |
| Rhamphomyia longicauda Loew, 1861 | Long-tailed Dance Fly |
| Rhamphomyia longicornis Loew, 1861 | |
| Rhamphomyia longipennis Loew, 1861 | |
| Rhamphomyia loripedis Coquillett, 1895 | |
| Rhamphomyia luctifera Loew, 1861 | |
| Rhamphomyia luctuosa Loew, 1872 | Juniper globemallow |
| Rhamphomyia luteiventer Curran, 1929 | |
| Rhamphomyia luteiventris Loew, 1864 | |
| Rhamphomyia macilenta Loew, 1864 | |
| Rhamphomyia mallos Walker, 1849 | Largeflower milkweed |
| Rhamphomyia manca Coquillett, 1895 | |
| Rhamphomyia minytus Walker, 1849 | Largeflower milkweed |
| Rhamphomyia mutabilis Loew, 1862 | Jone's globemallow |
| Rhamphomyia nana Loew, 1861 | |
| Rhamphomyia nasoni Coquillett, 1895 | |
| Rhamphomyia nigricans Loew, 1864 | |
| Rhamphomyia nitidivittata Macquart, 1846 | Watermelon |
| Rhamphomyia novecarolina Beutenmüller, 1913 | |
| Rhamphomyia opacithorax Malloch, 1923 | Laysan bur cucumber |
| Rhamphomyia otiosa Coquillett, 1895 | |
| Rhamphomyia pachymera Bigot, 1887 | |
| Rhamphomyia parva (Coquillett, 1895) | ⇒ Rhamphomyia albipennis Fallen, 1816 |
| Rhamphomyia pectinata Loew, 1861 | |
| Rhamphomyia pectoris Coquillett, 1895 | |
| Rhamphomyia phemius Walker, 1849 | Largeflower milkweed |
| Rhamphomyia piligeronis Coquillett, 1895 | |
| Rhamphomyia polita Loew, 1862 | Jone's globemallow |
| Rhamphomyia prava Chillcott, 1959 | |
| Rhamphomyia priapulus Loew, 1861 | |
| Rhamphomyia pulla Loew, 1861 | |
| Rhamphomyia pusio Loew, 1861 | |
| Rhamphomyia quinquelineata Say, 1823 | |
| Rhamphomyia rava Loew, 1862 | Fendler's globemallow |
| Rhamphomyia ravida Coquillett, 1895 | |
| Rhamphomyia rufirostra Say, 1829 | |
| Rhamphomyia rustica Loew, 1864 | |
| Rhamphomyia scaurissima Wheeler, 1896 | Cypresshead groundcherry |
| Rhamphomyia scolopacea Say, 1823 | |
| Rhamphomyia scutellaris Coquillett, 1895 | |
| Rhamphomyia sellata Loew, 1861 | |
| Rhamphomyia setosa Coquillett, 1895 | |
| Rhamphomyia similata Malloch, 1919 | |
| Rhamphomyia soccata Loew, 1861 | |
| Rhamphomyia sociabilis Williston, 1893 | |
| Rhamphomyia soleata Melander, 1965 | |
| Rhamphomyia sordida Loew, 1861 | |
| Rhamphomyia stylata Coquillett, 1895 | |
| Rhamphomyia tersa Coquillett, 1895 | |
| Rhamphomyia testacea Loew, 1862 | Jone's globemallow |
| Rhamphomyia tristis Walker, 1857 | Indian milkweed |
| Rhamphomyia umbilicata Loew, 1861 | |
| Rhamphomyia umbrosa Loew, 1864 | |
| Rhamphomyia unimaculata Loew, 1862 | Jone's globemallow |
| Rhamphomyia ursinella Melander, 1928 | |
| Rhamphomyia valga Coquillett, 1895 | |
| Rhamphomyia vara Loew, 1861 | |
| Rhamphomyia versicolor Chillcott, 1959 | |
| Rhamphomyia villipes Coquillett, 1900 | |
| Rhamphomyia virgata Coquillett, 1895 | |
| Rhamphomyia vittata Loew, 1862 | Jone's globemallow |
| Rhamphomyia weedii Coquillett, 1895 | |
| Toreus neomexicana Melander, 1902 | |
