| Allohelea bottimeri Wirth, 1991 | |
| Allohelea distortifemur Wirth, 1991 | |
| Allohelea johannseni Wirth, 1953 | Texan phlox |
| Allohelea nebulosus Coquillett, 1901 | |
| Allohelea pedicellata Wirth, 1991 | |
| Allohelea weemsi Wirth, 1991 | |
| Alluaudomyia bellus Coquillett, 1902 | |
| Alluaudomyia footei Wirth, 1952 | Hentz's phlox |
| Alluaudomyia megaparamera Williams, 1957 | Lady's nightcap |
| Alluaudomyia needhami Thomsen, 1935 | Iberian geranium |
| Alluaudomyia paraspina Wirth, 1952 | Hentz's phlox |
| Alluaudomyia parva Wirth, 1952 | Hentz's phlox |
| Alluaudomyia sitictipennis Wirth, 1952 | |
| Alluaudomyia variegata Glick & Mullen, 1982 | |
| Alluaudomyia wirthi Williams, 1957 | Lady's nightcap |
| Amerohelea frontispina Dow & Turner, 1976 | |
| Atyphohelea macroneura Malloch, 1915 | |
| Bezzia (Homobezzia) bicolor Meigen, 1804 | |
| Bezzia aklavikensis Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia albidorsata Malloch, 1915 | Maui bur cucumber |
| Bezzia andersonorum Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia apicata Malloch, 1914 | Gray's bur cucumber |
| Bezzia biannulata Wirth, 1952 | Hentz's phlox |
| Bezzia bilineata Wirth, 1952 | Hentz's phlox |
| Bezzia bivittatus Coquillett, 1905 | |
| Bezzia chelistyla Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia cockerelli Malloch, 1915 | Maui bur cucumber |
| Bezzia coloradensis (Wirth, 1952) | ⇒ Bezzia mazaruni Macfie, 1940 |
| Bezzia dentata Malloch, 1914 | Gray's bur cucumber |
| Bezzia dorsasetula Dow & Turner, 1976 | |
| Bezzia downesi Dow & Turner, 1976 | |
| Bezzia expolitus Coquillett, 1901 | |
| Bezzia fairchildi Wirth, 1983 | Showy phlox |
| Bezzia fascispinosa Clastrier, 1962 | |
| Bezzia flavitarsis Malloch, 1914 | Gray's bur cucumber |
| Bezzia flavitibia Dow & Turner, 1976 | |
| Bezzia gibber Coquillett, 1905 | |
| Bezzia gibberella Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia glaber Coquillett, 1902 | |
| Bezzia imbifida Dow & Turner, 1976 | |
| Bezzia japonica Tokunaga, 1939 | Cafe forastero |
| Bezzia laciniastyla Dow & Turner, 1976 | |
| Bezzia luteiventris Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia magnisetula Dow & Turner, 1976 | |
| Bezzia mallochi Wirth, 1951 | Trailing phlox |
| Bezzia mazaruni Macfie, 1940 | |
| Bezzia medius (Coquillett, 1904) | ⇒ Bezzia mallochi Wirth, 1951 |
| Bezzia mohave Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia nigripes Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia nobilis Winnertz, 1852 | |
| Bezzia obelisca Dow & Turner, 1976 | |
| Bezzia perplexa Dow & Turner, 1976 | |
| Bezzia pruinosus Coquillett, 1905 | |
| Bezzia pseudobscura Wirth, 1951 | Trailing phlox |
| Bezzia pulvereus Coquillett, 1901 | |
| Bezzia punctipennis Williston, 1896 | |
| Bezzia saileri Wirth, 1983 | Showy phlox |
| Bezzia sandersoni Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia setosinotum Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia sordida Wirth, 1952 | Hentz's phlox |
| Bezzia spathula Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia spicata Dow & Turner, 1976 | |
| Bezzia texensis Wirth & Grogan, 1983 | Clearwater phlox |
| Bezzia twinni Wirth, 1983 | Showy phlox |
| Bezzia uncistyla Dow & Turner, 1976 | |
| Bezzia unispina Dow & Turner, 1976 | |
| Bezzia varicolor Coquillett, 1902 | |
| Brachypogon canadensis Downes, 1976 | |
| Brachypogon pruinosa Wirth, 1952 | |
| Brachypogon serrata Lewis, 1956 | |
| Brachypogon stigmalis Coquillett, 1902 | |
| Ceratoculicoides blantoni Wirth & Rata..., 1971 | |
| Ceratoculicoides longipennis Wirth, 1952 | |
| Ceratoculicoides virginiana Wirth, 1951 | |
| Ceratopogon abstrusus Borkent & Gr..., 1995 | |
| Ceratopogon algidus Borkent & Gr..., 1995 | |
| Ceratopogon annettae Borkent & Gr..., 1995 | |
| Ceratopogon arcanus Borkent & Gr..., 1995 | |
| Ceratopogon boomerangus Borkent & Gr..., 1995 | |
| Ceratopogon cinaedicus Borkent & Gr..., 1995 | |
| Ceratopogon culicoidithorax Hoffman, 1926 | |
| Ceratopogon curtus Borkent & Gr..., 1995 | |
| Ceratopogon gigaforceps Remm, 1973 | |
| Ceratopogon inverecundus Borkent & Gr..., 1995 | |
| Ceratopogon mallochi Cole, 1921 | |
| Ceratopogon mammulus Borkent & Gr..., 1995 | |
| Ceratopogon multisetosus Borkent & Gr..., 1995 | |
| Ceratopogon pallicoleatus Borkent & Cole, 1995 | |
| Ceratopogon pandus Borkent & Gr..., 1995 | |
| Ceratopogon pontis Borkent & Gr..., 1995 | |
| Ceratopogon pubiantennalis Borkent & Gr..., 1995 | |
| Ceratopogon rectus Borkent & Gr..., 1995 | |
| Ceratopogon relictus Borkent & Gr..., 1995 | |
| Ceratopogon scutellatus (Say, 1829) | ⇒ Dasyhelea corinneae Gosseries, 1991 |
| Ceratopogon seculus Borkent & Gr..., 1995 | |
| Ceratopogon willisi Borkent & Gr..., 1995 | |
| Clinohelea bimaculatus Loew, 1861 | |
| Clinohelea curriei Coquillett, 1905 | |
| Clinohelea dimidiatus Adams, 1903 | |
| Clinohelea longitheca Grogan & Wirth, 1975 | |
| Clinohelea nubiferus Coquillett, 1905 | |
| Clinohelea pseudonubifera Grogan & Wirth, 1975 | |
| Clinohelea usingeri Wirth, 1952 | Hentz's phlox |
| Culicoides (Amossovia) arboricola Root & Hoffman, 1937 | Schaffner's wattle |
| Culicoides (Amossovia) beckae Wirth & Blanton, 1967 | |
| Culicoides (Amossovia) californiensis Wirth & Blanton, 1967 | |
| Culicoides (Amossovia) cochisensis Wirth & Blanton, 1967 | |
| Culicoides (Amossovia) flukei Jones, 1956 | Arctic catchfly |
| Culicoides (Amossovia) guttipennis (Coquillett, 1901) | ⇒ Culicoides meijerei Kieffer, 1919 |
| Culicoides (Amossovia) oklahomensis Khalaf, 1952 | Rose moss |
| Culicoides (Amossovia) ousairani Khalaf, 1952 | Rose moss |
| Culicoides (Amossovia) pecosensis Wirth, 1955 | |
| Culicoides (Amossovia) villosipennis Root & Hoffman, 1937 | Schaffner's wattle |
| Culicoides (Avaritia) chiopterus Meigen, 1830 | |
| Culicoides (Avaritia) obsoletus Meigen, 1818 | Common biting midge |
| Culicoides (Avaritia) pusillus Lutz, 1913 | Northern bog violet |
| Culicoides (Avaritia) sanguisuga Coquillett, 1901 | |
| Culicoides (Beltranmyia) sphagnumensis Williams, 1955 | |
| Culicoides (Drymodesmyia) loughnani Edwards, 1922 | |
| Culicoides (Haematomyidium) paraensis Goeldi, 1905 | |
| Culicoides (Hoffmania) insignis Lutz, 1913 | Northern bog violet |
| Culicoides (Monoculicoides) variipennis Coquillett, 1901 | |
| Culicoides (Oecacta) furens Poey, 1851 | |
| Culicoides (Oecacta) odiatus Austen, 1921 | |
| Culicoides (Silvaticulicoides) pallidicornis Kieffer, 1919 | |
| Culicoides (Trithecoides) meijerei Kieffer, 1919 | |
| Culicoides (Wirthomyia) minutissimus Zetterstedt, 1855 | |
| Culicoides alachua Jamnback & W..., 1963 | Sneed pincushion cactus |
| Culicoides alaskensis Wirth, 1951 | Trailing phlox |
| Culicoides alexanderi Wirth & Hubert, 1962 | |
| Culicoides arizonensis Wirth & Hubert, 1960 | Kelsey's phlox |
| Culicoides arubae Fox & Hoffman, 1944 | |
| Culicoides atchleyi Wirth & Blanton, 1969 | Musky phlox |
| Culicoides barbosai wirth and Blanton, 1956 | |
| Culicoides baueri Hoffman, 1925 | Mulberry |
| Culicoides bergi Cochrane, 1973 | |
| Culicoides bermudensis Williams, 1956 | Elephant creeper |
| Culicoides bickleyi Wirth & Hubert, 1962 | |
| Culicoides biguttatus Coquillett, 1901 | |
| Culicoides blantoni Vargas & Wirth, 1955 | Leiberg's umbrellawort |
| Culicoides bottimeri Wirth, 1955 | |
| Culicoides boydi Wirth & Mullens, 1992 | |
| Culicoides brookmani Wirth, 1952 | Hentz's phlox |
| Culicoides butleri Wirth & Hubert, 1960 | Kelsey's phlox |
| Culicoides byersi Atchley, 1967 | |
| Culicoides cacticola Wirth & Hubert, 1960 | Kelsey's phlox |
| Culicoides calexicanus Wirth & Rowley, 1971 | Wild sweetwilliam |
| Culicoides canadensis ♰ (Wirth & Blanton, 1969) | ⇒ Culicoides paraimpunctatus Borkent, 1995 |
| Culicoides cavaticus Wirth & Jones, 1956 | |
| Culicoides cockerellii Coquillett, 1901 | |
| Culicoides copiosus Root & Hoffman, 1937 | Schaffner's wattle |
| Culicoides crepuscularis Malloch, 1915 | Maui bur cucumber |
| Culicoides daedalus Macfie, 1948 | |
| Culicoides davisi Wirth & Rowley, 1971 | Wild sweetwilliam |
| Culicoides debilipalpis Lutz, 1913 | Northern bog violet |
| Culicoides defoliarti Atchley & Wirth, 1979 | |
| Culicoides denningi Foote & Pratt, 1954 | |
| Culicoides denticulatus Wirth & Hubert, 1962 | |
| Culicoides dickei (Jones, 1956) | ⇒ Culicoides furensoides Williams, 1955 |
| Culicoides doeringae Atchley, 1967 | |
| Culicoides downesi Wirth & Hubert, 1962 | |
| Culicoides eadsi Wirth & Blanton, 1971 | |
| Culicoides edeni Wirth & Blanton, 1974 | |
| Culicoides elutus Macfie, 1948 | |
| Culicoides erikae Atchley & Wirth, 1979 | |
| Culicoides floridensis Beck, 1951 | |
| Culicoides footei Wirth & Jones, 1956 | |
| Culicoides franclemonti Cochrane, 1974 | |
| Culicoides freeborni Wirth & Blanton, 1969 | Musky phlox |
| Culicoides frohnei Wirth & Blanton, 1969 | Musky phlox |
| Culicoides furensoides Williams, 1955 | |
| Culicoides gigas Root & Hoffman, 1937 | |
| Culicoides gregsoni Wirth & Blanton, 1969 | Musky phlox |
| Culicoides haematopotus Malloch, 1915 | Maui bur cucumber |
| Culicoides hawsi Wirth & Rowley, 1971 | Wild sweetwilliam |
| Culicoides hieroglyphicus Malloch, 1915 | Maui bur cucumber |
| Culicoides hinmani Khalaf, 1952 | Rose moss |
| Culicoides hirtulus Coquillett, 1900 | |
| Culicoides hoguei Wirth & Assi..., 1979 | Longleaf phlox |
| Culicoides hollensis Melander & B..., 1903 | Biting midge |
| Culicoides husseyi Wirth & Blanton, 1971 | |
| Culicoides inyoensis Wirth & Blanton, 1969 | Musky phlox |
| Culicoides jacksoni Atchley, 1970 | |
| Culicoides jamaicensis Edwards, 1922 | Biting midge |
| Culicoides jamesi Fox, 1946 | |
| Culicoides jamnbacki Wirth & Hubert, 1962 | |
| Culicoides jonesi Wirth & Hubert, 1960 | Kelsey's phlox |
| Culicoides juddi Cochrane, 1974 | |
| Culicoides knowltoni Beck, 1956 | |
| Culicoides kubunensis Tokunaga, 1937 | |
| Culicoides lahontan Wirth & Blanton, 1969 | Musky phlox |
| Culicoides leechi Wirth, 1977 | |
| Culicoides loisae Jamnback, 1965 | |
| Culicoides lophortygis Atchley & Wirth, 1975 | |
| Culicoides luglani Jones & Wirth, 1958 | Forked catchfly |
| Culicoides luteovenus Root & Hoffman, 1937 | |
| Culicoides melleus Coquillett, 1901 | |
| Culicoides mississippiensis Hoffman, 1926 | |
| Culicoides mohave Wirth, 1952 | Hentz's phlox |
| Culicoides monoensis Wirth, 1952 | Hentz's phlox |
| Culicoides mortivallis Wirth & Blanton, 1971 | |
| Culicoides mulrennani Beck, 1957 | |
| Culicoides multidentatus (Atchley & Wirth, 1975) | ⇒ Culicoides bottimeri Wirth, 1955 |
| Culicoides multipunctatus Malloch, 1915 | Maui bur cucumber |
| Culicoides nanellus Wirth & Blanton, 1969 | Musky phlox |
| Culicoides nanus Root & Hoffman, 1937 | Schaffner's wattle |
| Culicoides neofagineus Wirth & Blanton, 1969 | Musky phlox |
| Culicoides neomontanus Wirth, 1976 | Siberian phlox |
| Culicoides neopulicaris Wirth, 1955 | |
| Culicoides niger (Root & Hoffman, 1937) | ⇒ Culicoides odiatus Austen, 1921 |
| Culicoides novamexicanus Atchley, 1967 | |
| Culicoides occidentalis Wirth & Jones, 1957 | |
| Culicoides oregonensis Wirth & Rowley, 1971 | Wild sweetwilliam |
| Culicoides owyheenis (Jones & Wirth, 1978) | ⇒ Culicoides owyheensis Jones & Wirth, 1978 |
| Culicoides owyheensis Jones & Wirth, 1978 | Red campion |
| Culicoides palmerae James, 1943 | Claretcup hedgehog |
| Culicoides paraimpunctatus Borkent, 1995 | |
| Culicoides parapiliferus Wirth & Blanton, 1974 | |
| Culicoides pechumani Cochrane, 1974 | |
| Culicoides pifanoi Ortiz, 1951 | |
| Culicoides piliferus Root & Hoffman, 1937 | Schaffner's wattle |
| Culicoides posoensis Wirth & Blanton, 1969 | Musky phlox |
| Culicoides pseudopiliferus (Wirth & Hubert, 1962) | ⇒ Culicoides alexanderi Wirth & Hubert, 1962 |
| Culicoides reevesi Wirth, 1952 | Hentz's phlox |
| Culicoides riggsi Khalaf, 1957 | |
| Culicoides ryckmani Wirth & Hubert, 1960 | Kelsey's phlox |
| Culicoides salihi Khalaf, 1952 | Rose moss |
| Culicoides saltonensis Wirth, 1952 | Hentz's phlox |
| Culicoides saundersi Wirth & Blanton, 1969 | Musky phlox |
| Culicoides scanloni Wirth & Hubert, 1962 | |
| Culicoides sierrensis Wirth & Blanton, 1969 | Musky phlox |
| Culicoides sitiens Wirth & Hubert, 1960 | Kelsey's phlox |
| Culicoides snowi Wirth & Jones, 1956 | |
| Culicoides sommermanae Wirth & Blanton, 1969 | Musky phlox |
| Culicoides sordidellus Zetterstedt, 1838 | |
| Culicoides spinosus Root & Hoffman, 1937 | Schaffner's wattle |
| Culicoides stellifer Coquillett, 1901 | |
| Culicoides stilobezzioides Foote & Pratt, 1954 | |
| Culicoides stonei James, 1943 | Claretcup hedgehog |
| Culicoides sublettei Atchley, 1967 | |
| Culicoides tenuistylus Wirth, 1952 | Hentz's phlox |
| Culicoides testudinalis Wirth & Hubert, 1962 | |
| Culicoides tissoti Wirth & Blanton, 1966 | Smooth phlox |
| Culicoides torreyae Wirth & Blanton, 1971 | |
| Culicoides travisi Vargas, 1949 | |
| Culicoides tristriatulus (Hoffman, 1925) | ⇒ Culicoides elutus Macfie, 1948 |
| Culicoides unicolor Coquillett, 1905 | |
| Culicoides usingeri Wirth, 1952 | Hentz's phlox |
| Culicoides utahensis Fox, 1946 | |
| Culicoides utowana Jamnback, 1965 | |
| Culicoides venustus Hoffman, 1925 | Mulberry |
| Culicoides werneri Wirth & Blanton, 1971 | |
| Culicoides wirthi Foote & Pratt, 1954 | |
| Culicoides wisconsinensis Jones, 1956 | Arctic catchfly |
| Culicoides yukonensis Hoffman, 1925 | Mulberry |
| Dasyhelea (Pseudoculicoides) corinneae Gosseries, 1991 | |
| Dasyhelea ancorus Coquillett, 1902 | |
| Dasyhelea atlantis Wirth & Will..., 1957 | Flowery phlox |
| Dasyhelea atrata Wirth, 1952 | Hentz's phlox |
| Dasyhelea bahamensis Johnson, 1908 | |
| Dasyhelea bajensis Wirth, 1978 | |
| Dasyhelea bermudae Wirth & Will..., 1957 | Flowery phlox |
| Dasyhelea brevicornis Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea brevicosta Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea brookmani Wirth, 1952 | Hentz's phlox |
| Dasyhelea cactorum Wirth & Hubert, 1960 | Kelsey's phlox |
| Dasyhelea chani Wirth & Linley, 1990 | |
| Dasyhelea cinctus Coquillett, 1901 | |
| Dasyhelea crassiseta Borkent & Fo..., 1986 | |
| Dasyhelea festiva Wirth, 1952 | Hentz's phlox |
| Dasyhelea griseus Coquillett, 1901 | |
| Dasyhelea johannseni Malloch, 1915 | |
| Dasyhelea leptobranchia Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea luteogrisea Wirth & Will..., 1957 | Flowery phlox |
| Dasyhelea major Malloch, 1915 | |
| Dasyhelea messersmithi Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea mutabilis Coquillett, 1901 | |
| Dasyhelea navaiae Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea neobifurcata Wirth, 1976 | Siberian phlox |
| Dasyhelea oppressa Thomsen, 1935 | Iberian geranium |
| Dasyhelea pallens Wirth, 1952 | Hentz's phlox |
| Dasyhelea pentalineata Wirth & Hubert, 1960 | Kelsey's phlox |
| Dasyhelea pollinosa Wirth, 1952 | Hentz's phlox |
| Dasyhelea pritchardi Wirth, 1952 | Hentz's phlox |
| Dasyhelea pseudocincta Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea pseudoincisurata Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea ryckmani Wirth & Hubert, 1960 | Kelsey's phlox |
| Dasyhelea sanctaemariae Wirth, 1952 | Hentz's phlox |
| Dasyhelea scissurae Macfie, 1937 | Bushy frostweed |
| Dasyhelea scutellatus Meigen, 1830 | |
| Dasyhelea sonorensis Wirth, 1978 | |
| Dasyhelea spiniforma Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea stemlerae Waugh & Wirth, 1976 | Davis horsenettle |
| Dasyhelea sublettei Wirth, 1987 | |
| Dasyhelea tenebrosus Coquillett, 1905 | |
| Dasyhelea thomsenae Wirth, 1952 | Hentz's phlox |
| Dasyhelea traverae Thomson, 1935 | Iberian geranium |
| Dasyhelea tristyla Wirth, 1952 | Hentz's phlox |
| Downeshelea stonei Wirth, 1953 | Texan phlox |
| Echinohelea lanei Wirth, 1951 | Trailing phlox |
| Heteromyia fasciata Say, 1825 | |
| Heteromyia prattii Coquillett, 1902 | |
| Jenkinshelea albarius Coquillett, 1895 | |
| Jenkinshelea blantoni Grogan & Wirth, 1977 | Gray's cloak fern |
| Jenkinshelea magnipennis Johannsen, 1908 | |
| Jenkinshelea stonei Grogan & Wirth, 1977 | Gray's cloak fern |
| Johannsenomyia annulicornis Malloch, 1918 | 'anunu |
| Johannsenomyia argentatus Loew, 1861 | |
| Macropeza blantoni Wirth & Rata..., 1972 | |
| Mallochohelea albibasis Malloch, 1915 | |
| Mallochohelea albihalter Wirth, 1962 | Downy phlox |
| Mallochohelea atripes Wirth, 1962 | Downy phlox |
| Mallochohelea caudellii Coquillett, 1905 | |
| Mallochohelea flavidula Malloch, 1914 | |
| Mallochohelea pullata Wirth, 1952 | |
| Mallochohelea smithi Lewis, 1956 | |
| Mallochohelea spinipes Wirth, 1962 | Downy phlox |
| Mallochohelea sybleae Wirth, 1952 | |
| Mallochohelea texensis Wirth, 1962 | Downy phlox |
| Mallochohelea variegata Wirth, 1962 | Downy phlox |
| Monohelea andersoni Wirth & Grogan, 1981 | Carpet phlox |
| Monohelea bifurcata Wirth & Will..., 1964 | |
| Monohelea floridensis Wirth & Will..., 1964 | |
| Monohelea hirsuta Wirth & Grogan, 1981 | Carpet phlox |
| Monohelea jamnbacki Wirth & Will..., 1964 | |
| Monohelea knighti Wirth & Will..., 1964 | |
| Monohelea lanei Wirth, 1953 | Texan phlox |
| Monohelea macfiei Wirth, 1953 | Texan phlox |
| Monohelea maculipennis Coquillett, 1905 | |
| Monohelea magnitheca Wirth & Grogan, 1981 | Carpet phlox |
| Monohelea obscura Wirth & Will..., 1964 | |
| Monohelea ornata Wirth, 1953 | Texan phlox |
| Monohelea texana Wirth, 1953 | Texan phlox |
| Monohelea wirthi Khalaf, 1969 | |
| Neurobezzia granulosa Wirth, 1952 | |
| Neurohelea macroneura Malloch, 1915 | |
| Neurohelea nigra (Wirth, 1952) | ⇒ Atyphohelea macroneura Malloch, 1915 |
| Nilobezzia brevicornis Wirth, 1952 | |
| Nilobezzia mallochi Wirth, 1962 | Downy phlox |
| Nilobezzia minor Wirth, 1952 | |
| Nilobezzia schwarzii Coquillett, 1901 | |
| Pachyhelea pachymerus Williston, 1900 | |
| Palpomyia aldrichi Malloch, 1915 | |
| Palpomyia altispina Grogan & Wirth, 1975 | |
| Palpomyia armatipes Wirth, 1952 | Hentz's phlox |
| Palpomyia aspina Grogan & Wirth, 1979 | Gregg's cloak fern |
| Palpomyia basalis Walker, 1848 | |
| Palpomyia belkini Grogan & Wirth, 1979 | Gregg's cloak fern |
| Palpomyia bottimeri Grogan & Wirth, 1979 | Gregg's cloak fern |
| Palpomyia canadensis Grogan & Wirth, 1979 | |
| Palpomyia cressoni Malloch, 1915 | |
| Palpomyia downesi Grogan & Wirth, 1979 | |
| Palpomyia flaviceps Johannsen, 1908 | |
| Palpomyia hastata Grogan & Wirth, 1975 | |
| Palpomyia jamnbacki Grogan & Wirth, 1979 | Gregg's cloak fern |
| Palpomyia jonesi Grogan & Wirth, 1975 | |
| Palpomyia kernensis Wirth, 1952 | Hentz's phlox |
| Palpomyia lineatus Meigen, 1818 | |
| Palpomyia linsleyi Wirth, 1952 | Hentz's phlox |
| Palpomyia nigripes Meigen, 1830 | |
| Palpomyia novitibalis Grogan & Wirth, 1975 | |
| Palpomyia occidentalis Grogan & Wirth, 1979 | Gregg's cloak fern |
| Palpomyia plebeiella Grogan & Wirth, 1975 | |
| Palpomyia plebeius Loew, 1861 | |
| Palpomyia praeustus Loew, 1869 | |
| Palpomyia pseudorufa Grogan & Wirth, 1975 | |
| Palpomyia rubiginosa Grogan & Wirth, 1975 | |
| Palpomyia rufus Loew, 1861 | |
| Palpomyia scalpellifera Grogan & Wirth, 1975 | |
| Palpomyia stonei Wirth, 1951 | Trailing phlox |
| Palpomyia subasper Coquillett, 1901 | |
| Palpomyia tibialis Meigen, 1818 | |
| Palpomyia trifasciata Wirth, 1952 | Hentz's phlox |
| Palpomyia walteri Grogan & Wirth, 1979 | Gregg's cloak fern |
| Palpomyia weemsi Grogan & Wirth, 1979 | Gregg's cloak fern |
| Parabezzia alexanderi Wirth, 1965 | Downy phlox |
| Parabezzia atchleyi Grogan & Wirth, 1977 | Gray's cloak fern |
| Parabezzia bystraki Grogan & Wirth, 1977 | Gray's cloak fern |
| Parabezzia downesi Wirth, 1965 | Downy phlox |
| Parabezzia eupetiolata Grogan & Wirth, 1977 | Gray's cloak fern |
| Parabezzia horvathi Grogan & Wirth, 1977 | Gray's cloak fern |
| Parabezzia huberti Grogan & Wirth, 1977 | Gray's cloak fern |
| Parabezzia inermis Coquillett, 1902 | |
| Parabezzia neunguis Grogan & Wirth, 1977 | Gray's cloak fern |
| Parabezzia petiolata Malloch, 1915 | Maui bur cucumber |
| Parabezzia texensis Grogan & Wirth, 1977 | Gray's cloak fern |
| Parabezzia unguis Wirth, 1965 | Downy phlox |
| Parabezzia williamsi Wirth, 1965 | Downy phlox |
| Paradasyhelea olympiae Wirth & Blanton, 1969 | Henderson's phlox |
| Paryphoconus sonorensis Wirth & Rata..., 1972 | |
| Phaenobezzia fulvithorax Malloch, 1915 | |
| Phaenobezzia opacus Loew, 1861 | |
| Phaenobezzia sabroskyi Wirth & Grogan, 1982 | |
| Probezzia albitibia Wirth, 1971 | |
| Probezzia albiventris Loew, 1861 | |
| Probezzia atriventris Wirth, 1951 | Trailing phlox |
| Probezzia bottimeri Wirth, 1971 | |
| Probezzia concinnus Meigen, 1818 | |
| Probezzia fairchildi Wirth, 1994 | |
| Probezzia flavoniger Coquillett, 1905 | |
| Probezzia fuscipennis Wirth, 1971 | |
| Probezzia glicki Wirth, 1994 | |
| Probezzia infuscata Malloch, 1915 | Maui bur cucumber |
| Probezzia jamnbacki Wirth, 1971 | |
| Probezzia ludoviciana Wirth, 1951 | Trailing phlox |
| Probezzia meadi Wirth, 1994 | |
| Probezzia nigra Wirth, 1971 | |
| Probezzia pallida Malloch, 1914 | Gray's bur cucumber |
| Probezzia rosewalli Wirth, 1951 | Trailing phlox |
| Probezzia sabroskyi Wirth, 1951 | Trailing phlox |
| Probezzia seminigra Panzer, 1798 | |
| Probezzia smithii Coquillett, 1901 | |
| Probezzia unica Johannsen, 1934 | |
| Probezzia weemsi Wirth, 1994 | |
| Probezzia williamsi Wirth, 1971 | |
| Probezzia xanthogaster Kieffer, 1917 | |
| Rhynchohelea monilicornis Wirth & Blanton, 1970 | |
| Schizohelea leucopeza Meigen, 1804 | |
| Schizonyxhelea bulla Thomsen Thomsen, 0 | |
| Serromyia barberi Wirth, 1952 | Hentz's phlox |
| Serromyia borealis Borkent, 1990 | |
| Serromyia crassifemorata Malloch, 1914 | Gray's bur cucumber |
| Serromyia ledicola Kieffer, 1925 | |
| Serromyia nudicolis Borkent, 1990 | |
| Serromyia sierrensis Borkent, 1990 | |
| Serromyia vockerothi Borkent, 1990 | |
| Sphaeromias bifidus Wirth & Grogan, 1979 | Carpet phlox |
| Sphaeromias longipennis Loew, 1861 | |
| Stenoxenus johnsoni Coquillett, 1899 | |
| Stilobezzia (Acanthohelea) bicolor Lane, 1947 | Wetherill's buckwheat |
| Stilobezzia (Acanthohelea) pruinosa (Wirth, 1952) | ⇒ Stilobezzia hirta Borkent, 1997 |
| Stilobezzia (Acanthohelea) viridis Coquillett, 1901 | |
| Stilobezzia (Stilobezzia) antennalis Coquillett, 1901 | |
| Stilobezzia amnigena Macfie, 1935 | |
| Stilobezzia beckae Wirth, 1953 | Texan phlox |
| Stilobezzia bulla Thomson, 1935 | Iberian geranium |
| Stilobezzia coquilletti Kieffer, 1917 | Brewer's redmaids |
| Stilobezzia diversus Coquillett, 1901 | |
| Stilobezzia elegantula Johannsen, 1907 | |
| Stilobezzia fuscula Wirth, 1952 | Hentz's phlox |
| Stilobezzia glauca Macfie, 1939 | Clustered frostweed |
| Stilobezzia hirta Borkent, 1997 | |
| Stilobezzia kiefferi Lane, 1947 | Wetherill's buckwheat |
| Stilobezzia lutea Malloch, 1918 | |
| Stilobezzia navaiae Wirth & Grogan, 1981 | Carpet phlox |
| Stilobezzia pallidiventris Malloch, 1915 | |
| Stilobezzia rabelloi Lane, 1947 | Wetherill's buckwheat |
| Stilobezzia stonei Wirth, 1953 | Texan phlox |
| Stilobezzia sybleae Wirth, 1953 | Texan phlox |
| Stilobezzia thomsenae Wirth, 1953 | Texan phlox |
| Washingtonhelea frommeri Wirth & Grogan, 1988 | |
