| Antichaeta borealis Foote, 1961 | |
| Antichaeta fulva Steyskal, 1960 | |
| Antichaeta melanosoma Melander, 1920 | Hoary alyssum |
| Antichaeta robiginosa Melander, 1920 | |
| Antichaeta testacea Melander, 1920 | |
| Antichaeta vernalis Fisher and Orth, 1971 | |
| Anticheta borealis (Foote, 1961) | ⇒ Antichaeta borealis Foote, 1961 |
| Anticheta canadensis Curran, 1923 | |
| Anticheta fulva (Steyskal, 1960) | ⇒ Antichaeta fulva Steyskal, 1960 |
| Anticheta johnsoni Cresson, 1920 | |
| Anticheta melanosoma (Melander, 1920) | ⇒ Antichaeta melanosoma Melander, 1920 |
| Anticheta robiginosa (Melander, 1920) | ⇒ Antichaeta robiginosa Melander, 1920 |
| Anticheta testacea (Melander, 1920) | ⇒ Antichaeta testacea Melander, 1920 |
| Anticheta vernalis (Fisher & Orth, 1971) | ⇒ Antichaeta vernalis Fisher and Orth, 1971 |
| Atrichomelina pubera Loew, 1862 | Butte County checkerbloom |
| Colobaea americana Steyskal, 1954 | Santa Barbara ceanothus |
| Colobaea canadensis Knutson & Orth, 1990 | |
| Colobaea montana Knutson & Orth, 1990 | |
| Dictya adjuncta Valley, 1977 | Eastwood's desertparsley |
| Dictya atlantica Steyskal, 1954 | Santa Barbara ceanothus |
| Dictya borealis Curran, 1932 | |
| Dictya brimleyi Steyskal, 1954 | Santa Barbara ceanothus |
| Dictya caliente Orth, 1991 | |
| Dictya disjuncta Orth, 1991 | |
| Dictya expansa Steyskal, 1938 | Pinemat |
| Dictya floridensis Steyskal, 1954 | Santa Barbara ceanothus |
| Dictya fontinalis Fisher & Orth, 1969 | |
| Dictya gaigei Steyskal, 1938 | Pinemat |
| Dictya hudsonica Steyskal, 1954 | Santa Barbara ceanothus |
| Dictya incisa Curran, 1932 | |
| Dictya laurentiana Steyskal, 1954 | Santa Barbara ceanothus |
| Dictya lobifera Curran, 1932 | |
| Dictya matthewsi Steyskal, 1960 | Chaparral whitethorn |
| Dictya montana Steyskal, 1954 | Santa Barbara ceanothus |
| Dictya orion Orth, 1991 | |
| Dictya oxybeles Steyskal, 1960 | Chaparral whitethorn |
| Dictya pechumani Valley, 1977 | Eastwood's desertparsley |
| Dictya pictipes Loew, 1859 | |
| Dictya praecipua Orth, 1991 | |
| Dictya ptyarion Steyskal, 1954 | Santa Barbara ceanothus |
| Dictya sabroskyi Steyskal, 1938 | Pinemat |
| Dictya steyskali Valley, 1977 | Eastwood's desertparsley |
| Dictya stricta Steyskal, 1938 | Pinemat |
| Dictya texensis Curran, 1932 | |
| Dictya umbrarum Linnaeus, 1758 | |
| Dictya umbroides Curran, 1932 | |
| Dictya zacki Orth & Fisher, 1983 | Sequoia gooseberry |
| Dictyacium ambigua Loew, 1864 | |
| Dictyacium firmum Steyskal, 1956 | Coast whitethorn |
| Elgiva connexa Steyskal, 1943 | |
| Elgiva divisa Loew, 1845 | |
| Elgiva elegans Orth & Knutson, 1987 | |
| Elgiva pacnowesa Orth & Knutson, 1987 | |
| Elgiva solicita Harris, 1780 | |
| Euthycera arcuata Loew, 1859 | |
| Hedria mixta Steyskal, 1954 | Santa Barbara ceanothus |
| Hoplodictya acuticornis Wulp, 1897 | |
| Hoplodictya australis Fisher & Orth, 1972 | |
| Hoplodictya kincaidi Johnson, 1913 | |
| Hoplodictya setosa Coquillett, 1901 | |
| Hoplodictya spinicornis Loew, 1866 | |
| Limnia boscii Robineau-Des..., 1830 | |
| Limnia conica Steyskal, 1978 | Parry's ceanothus |
| Limnia fitchi Steyskal, 1978 | Parry's ceanothus |
| Limnia georgiae Melander, 1920 | Hoary alyssum |
| Limnia inopa Adams, 1904 | |
| Limnia lemmoni Fisher & Orth, 1971 | |
| Limnia lindbergi Steyskal, 1978 | Parry's ceanothus |
| Limnia loewi Steyskal, 1965 | Bolinas ceanothus |
| Limnia louisianae Melander, 1920 | Hoary alyssum |
| Limnia nambai Steyskal, 1978 | Parry's ceanothus |
| Limnia ottawensis Melander, 1920 | Hoary alyssum |
| Limnia pubescens Day, 1881 | |
| Limnia sandovalensis Fisher & Orth, 1978 | |
| Limnia saratogensis Fitch, 1855 | |
| Limnia septentrionalis Melander, 1920 | Hoary alyssum |
| Limnia severa Cresson, 1920 | |
| Limnia shannoni Cresson, 1920 | |
| Limnia sparsa Loewe, 1862 | |
| Limnia vittata Melander, 1920 | Hoary alyssum |
| Oidematops ferrugineus Cresson, 1920 | |
| Oxytaenia bardus Cresson, 1868 | |
| Pherbecta limenitis Steyskal, 1956 | Coast whitethorn |
| Pherbellia albocostata Fallen, 1820 | |
| Pherbellia albovaria Coquillett, 1901 | |
| Pherbellia aloea Orth, 1983 | |
| Pherbellia anubis Knutson, 1969 | Slender amaranth |
| Pherbellia argyra Verbeke, 1967 | Evening trumpetflower |
| Pherbellia beatricis Steyskal, 1949 | Desert ceanothus |
| Pherbellia borea Orth, 1982 | Victor's gooseberry |
| Pherbellia bryanti Steyskal, 1967 | |
| Pherbellia californica Orth, 1982 | Victor's gooseberry |
| Pherbellia fisheri Orth, 1987 | |
| Pherbellia footei Steyskal, 1961 | |
| Pherbellia frohnei Steyskal, 1963 | Maritime California-lilac |
| Pherbellia fusca Cresson, 1920 | |
| Pherbellia griseicollis Becker, 1900 | |
| Pherbellia griseola Fallen, 1820 | |
| Pherbellia guttata Coquillett, 1901 | |
| Pherbellia idahoensis Steyskal, 1961 | |
| Pherbellia inflexa Orth, 1983 | |
| Pherbellia luctifera Loew, 1861 | |
| Pherbellia marthae Orth, 1982 | Victor's gooseberry |
| Pherbellia melanderi Steyskal, 1963 | Maritime California-lilac |
| Pherbellia nana Fallen, 1820 | |
| Pherbellia obscura Ringdahl, 1948 | |
| Pherbellia obtusa Fallen, 1820 | |
| Pherbellia oregona Steyskal, 1961 | |
| Pherbellia paludum Orth, 1982 | Victor's gooseberry |
| Pherbellia parallela Walker, 1853 | |
| Pherbellia phela Steyskal, 1963 | Maritime California-lilac |
| Pherbellia prefixa Steyskal, 1967 | |
| Pherbellia propages Steyskal, 1967 | |
| Pherbellia quadrata Steyskal, 1961 | |
| Pherbellia schoenherri Fallen, 1826 | |
| Pherbellia seticoxa Steyskal, 1961 | |
| Pherbellia similis Cresson, 1920 | |
| Pherbellia spectabilis Orth, 1984 | Sticky currant |
| Pherbellia subtilis Orth & Steyskal, 1980 | Desert gooseberry |
| Pherbellia suspecta Orth & Steyskal, 1981 | Island gooseberry |
| Pherbellia tenuipes Loew, 1872 | |
| Pherbellia trabeculata Loew, 1872 | |
| Pherbellia trivittata Cresson, 1920 | |
| Pherbellia ursilacus Orth, 1982 | Victor's gooseberry |
| Pherbellia vitalis Cresson, 1920 | |
| Poecilographa decora Loew, 1864 | |
| Pteromicra albicalceata Cresson, 1920 | |
| Pteromicra angustipennis Staeger, 1845 | |
| Pteromicra anopla Steyskal, 1954 | Santa Barbara ceanothus |
| Pteromicra apicata Loew, 1876 | |
| Pteromicra leucopeza Meigen, 1838 | |
| Pteromicra leucothrix Melander, 1920 | Hoary alyssum |
| Pteromicra pectorosa Hendel, 1902 | |
| Pteromicra perissa Steyskal, 1958 | Jepson ceanothus |
| Pteromicra pleuralis Cresson, 1920 | |
| Pteromicra rudis Knutson & Zuska, 1968 | Roughfruit amaranth |
| Pteromicra similis Steyskal, 1954 | Santa Barbara ceanothus |
| Pteromicra siskiyouensis Fisher & Orth, 1966 | |
| Pteromicra sphenura Steyskal, 1954 | Santa Barbara ceanothus |
| Pteromicra steyskali Foote, 1959 | |
| Pteromicra varia Coquillett, 1904 | |
| Renocera amanda Cresson, 1920 | |
| Renocera brevis Cresson, 1920 | |
| Renocera johnsoni Cresson, 1920 | |
| Renocera longipes Loew, 1876 | |
| Sciomyza antica Walker, 1853 | |
| Sciomyza aristalis Coquillett, 1901 | |
| Sciomyza dryomyzina Zetterstedt, 1846 | Nuttall's desert-trumpets |
| Sciomyza simplex Fallen, 1820 | |
| Sciomyza varia (Coquillett, 1904) | ⇒ Pteromicra varia Coquillett, 1904 |
| Sepedomerus macropus Walker, 1849 | Fly |
| Sepedon (Sepedon) spinipes Scopoli, 1763 | |
| Sepedon anachista Steyskal, 1956 | |
| Sepedon armipes Loew, 1859 | |
| Sepedon bifida Steyskal, 1951 | Carmel ceanothus |
| Sepedon borealis Steyskal, 1951 | Carmel ceanothus |
| Sepedon capellei Fisher & Orth, 1969 | |
| Sepedon cascadensis Fisher & Orth, 1974 | |
| Sepedon floridensis Steyskal, 1951 | |
| Sepedon fuscipennis Loew, 1859 | |
| Sepedon gracilicornis Orth, 1986 | |
| Sepedon lignator Steyskal, 1951 | Carmel ceanothus |
| Sepedon melanderi Steyskal, 1951 | Carmel ceanothus |
| Sepedon neili Steyskal, 1951 | Carmel ceanothus |
| Sepedon pacifica Cresson, 1914 | |
| Sepedon praemiosa Giglio-Tos, 1893 | Marsh fly |
| Sepedon pseudarmipes Fisher & Orth, 1969 | |
| Sepedon pusilla Loew, 1859 | |
| Sepedon tenuicornis Cresson, 1920 | |
| Tetanocera (Chaetotetanocera) robusta Loew, 1847 | |
| Tetanocera (Tetanocera) ferruginea Fallen, 1820 | |
| Tetanocera (Tetanocera) freyi Stackelberg, 1963 | Rocklands spurge |
| Tetanocera (Tetanocera) fuscinervis Zetterstedt, 1838 | |
| Tetanocera (Tetanocera) latifibula Frey, 1924 | |
| Tetanocera (Tetanocera) montana Day, 1881 | |
| Tetanocera (Tetanocera) phyllophora Melander, 1920 | Hoary alyssum |
| Tetanocera (Tetanocera) silvatica Meigen, 1830 | Poorfen Buff Snailkiller |
| Tetanocera andromastos Steyskal, 1963 | Maritime California-lilac |
| Tetanocera annae Steyskal, 1938 | Pinemat |
| Tetanocera arnaudi Orth & Fisher, 1982 | Red currant |
| Tetanocera bergi Steyskal, 1954 | Santa Barbara ceanothus |
| Tetanocera brevisetosa Frey, 1924 | |
| Tetanocera clara Loew, 1862 | Jone's globemallow |
| Tetanocera iowensis Steyskal, 1938 | Pinemat |
| Tetanocera loewi Steyskal, 1959 | Lemmon's ceanothus |
| Tetanocera melanostigma Steyskal, 1959 | Lemmon's ceanothus |
| Tetanocera mesopora Steyskal, 1959 | Lemmon's ceanothus |
| Tetanocera obtusifibula Melander, 1920 | Hoary alyssum |
| Tetanocera ornatifrons Frey, 1924 | |
| Tetanocera oxia Steyskal, 1959 | Lemmon's ceanothus |
| Tetanocera plebeja Loew, 1862 | Jone's globemallow |
| Tetanocera plumosa Loew, 1847 | |
| Tetanocera rotundicornis Loew, 1861 | |
| Tetanocera soror Melander, 1920 | Hoary alyssum |
| Tetanocera spirifera Melander, 1920 | Hoary alyssum |
| Tetanocera stricklandi Steyskal, 1959 | Lemmon's ceanothus |
| Tetanocera valida Loew, 1862 | Jone's globemallow |
| Tetanocera vicina Macquart, 1843 | American melonleaf |
| Trypetoptera canadensis Macquart, 1843 | |
