| Agapanthinus callophilus Cockerell, 1923 | |
| Allodape melipona | |
| Amegilla (Amegilla) quadrifasciata de Villers, 1789 | White-banded Digger Bee |
| Ammobates (Euphileremus) oraniensis Lepeletier, 1841 | |
| Ammobates bilobatus | |
| Ammobates branchi | |
| Anthophora (Anthophora) plumipes Pallas, 1772 | Hairy footed flower bee |
| Anthophora (Anthophoroides) californica Cresson, 1869 | California Anthophora |
| Anthophora (Anthophoroides) linsleyi Timberlake, 1941 | |
| Anthophora (Anthophoroides) marginata Smith, 1854 | |
| Anthophora (Anthophoroides) phaceliae Brooks, 1988 | |
| Anthophora (Anthophoroides) signata Brooks, 1988 | |
| Anthophora (Anthophoroides) vallorum Cockerell, 1896 | |
| Anthophora (Clisodon) furcata Panzer, 1798 | Fork Tailed Flower Bee |
| Anthophora (Clisodon) terminalis Cresson, 1869 | Orange-Tipped Wood-Digger Bee |
| Anthophora (Heliophila) abroniae Timberlake, 1937 | |
| Anthophora (Heliophila) albata Cresson, 1876 | |
| Anthophora (Heliophila) cockerelli Timberlake, 1937 | |
| Anthophora (Heliophila) columbariae Timberlake &..., 1937 | |
| Anthophora (Heliophila) curta (Provancher, 1895) | ⇒ Anthophora squammulosa Dours, 1869 |
| Anthophora (Heliophila) exigua Cresson, 1879 | |
| Anthophora (Heliophila) flavocincta Huard, 1897 | |
| Anthophora (Heliophila) hololeuca Cockerell, 1923 | |
| Anthophora (Heliophila) lanzarotensis Tkalcu, 1993 | |
| Anthophora (Heliophila) maculifrons Cresson, 1879 | |
| Anthophora (Heliophila) mortuaria Timberlake, 1937 | |
| Anthophora (Heliophila) peritomae Cockerell, 1905 | |
| Anthophora (Heliophila) petrophila Cockerell, 1905 | |
| Anthophora (Heliophila) phenax Cockerell, 1898 | |
| Anthophora (Heliophila) salazariae Timberlake, 1937 | |
| Anthophora (Heliophila) squammulosa Dours, 1869 | |
| Anthophora (Heliophila) tridentella Priesner, 1957 | |
| Anthophora (Lophanthophora) affabilis Cresson, 1878 | |
| Anthophora (Lophanthophora) coptognatha Timberlake, 1951 | |
| Anthophora (Lophanthophora) dammersi Timberlake, 1937 | |
| Anthophora (Lophanthophora) neglecta Timberlake &..., 1936 | |
| Anthophora (Lophanthophora) pacifica Cresson, 1878 | |
| Anthophora (Lophanthophora) porterae Cockerell, 1900 | |
| Anthophora (Lophanthophora) ursina Cresson, 1869 | |
| Anthophora (Melea) abrupta Say, 1837 | Vegetable hummingbird |
| Anthophora (Melea) bomboides Kirby, 1837 | Bumble-bee-mimic Anthophora |
| Anthophora (Melea) occidentalis Cresson, 1869 | Digger bee |
| Anthophora (Micranthophora) rhodothorax Michener, 1936 | |
| Anthophora (Mystacanthophora) incerta Spinola, 1851 | |
| Anthophora (Mystacanthophora) montana Cresson, 1869 | Rocky Mountain Anthophora |
| Anthophora (Mystacanthophora) urbana Cresson, 1878 | |
| Anthophora (Mystacanthophora) walshii Cresson, 1869 | Walsh´s Anthophora |
| Anthophora (Paramegilla) centriformis Cresson, 1879 | |
| Anthophora (Paramegilla) fulvicauda Timberlake, 1937 | |
| Anthophora (Pyganthophora) alluaudi Perez, 1902 | |
| Anthophora (Pyganthophora) crotchii Cresson, 1878 | Crotch´s Anthophora |
| Anthophora (Pyganthophora) edwardsii Cresson, 1878 | |
| Anthophora (Pyganthophora) forbesi Cockerell, 1907 | |
| Anthophora (Pyganthophora) lesquerellae Cockerell, 1896 | |
| Anthophora (Pyganthophora) porphyrea Westrich, 1993 | |
| Anthophora (Uncertain) purpuraria Westrich, 1993 | |
| Anthophora anasazi | |
| Anthophora boharti Brooks, 1988 | |
| Anthophora carbonaria Morawitz, 1876 | |
| Anthophora catalinae Cockerell, 1901 | |
| Anthophora cinerula | |
| Anthophora compactula | |
| Anthophora corvicolor Cockerell, 1905 | |
| Anthophora erythrothorax Michener, 1936 | |
| Anthophora estebana Cockerell, 1923 | |
| Anthophora flexipes Cresson, 1879 | |
| Anthophora ignava Cresson, 1879 | |
| Anthophora lieftinctki Tkalcu, 1994 | |
| Anthophora melfordi ♰ T. D. A. Coc..., 1908 | |
| Anthophora morrisoni Cresson, 1879 | |
| Anthophora mucida (Gribodo, 1873) | ⇒ Habropoda cressoni Dalla Torre, 1896 |
| Anthophora pachyodonta Cockerell, 1923 | |
| Anthophora pernigra Cresson, 1879 | |
| Anthophora platti Timberlake, 1951 | |
| Anthophora pueblo Orr, 2016 | |
| Anthophora simillima Cresson, 1879 | |
| Anthophora smithii Dours, 1869 | |
| Anthophora sodalis Cresson, 1879 | |
| Anthophora stanfordiana Cockerell, 1904 | |
| Anthophora striata Orr, 2018 | |
| Anthophora timberlakei Orr, 2018 | |
| Anthophora vannigera Timberlake, 1951 | |
| Anthophora villosula (Smith, 1854) | ⇒ Colletes hederae Schmidt & We..., 1993 |
| Anthophorula (Anthophorisca) chionura Cockerell, 1925 | |
| Anthophorula (Anthophorisca) morgani Cockerell, 1914 | |
| Anthophorula (Anthophorisca) nitens Cockerell, 1915 | |
| Anthophorula (Anthophorisca) parva Timberlake, 1980 | |
| Anthophorula (Anthophorisca) pygmaea Cresson, 1872 | |
| Anthophorula (Anthophorisca) sidae Cockerell, 1897 | |
| Anthophorula (Anthophorula) albata Timberlake, 1947 | |
| Anthophorula (Anthophorula) albicans Provancher, 1896 | |
| Anthophorula (Anthophorula) albovestita Timberlake, 1947 | |
| Anthophorula (Anthophorula) cerei Timberlake, 1947 | |
| Anthophorula (Anthophorula) compactula Cockerell, 1897 | |
| Anthophorula (Anthophorula) deserticola Timberlake, 1947 | |
| Anthophorula (Anthophorula) eriogoni Timberlake, 1947 | |
| Anthophorula (Anthophorula) euphorbiae Timberlake, 1947 | |
| Anthophorula (Anthophorula) gutierreziae Timberlake, 1947 | |
| Anthophorula (Anthophorula) rufiventris Timberlake, 1947 | |
| Anthophorula (Anthophorula) torticornis Cockerell, 1927 | |
| Anthophorula crenulata Timberlake, 1980 | |
| Anthophorula morula Timberlake, 1980 | |
| Anthophorula nevadensis Timberlake, 1980 | |
| Anthophorula palmarum Timberlake, 1947 | |
| Anthophorula scapalis Timberlake, 1980 | |
| Anthophorula varleyi Timberlake, 1947 | |
| Apathus californicus Cresson, 1879 | |
| Apis (Apis) mellifera Linnaeus, 1758 | Drone-Bee |
| Apis (Cascapis) nearctica ♰ Engel, Hinoj..., 2009 | |
| Bombomelecta azygos Viereck, 1903 | |
| Bombomelecta zygos Viereck, 1903 | |
| Bombus (Alpigenobombus) breviceps Smith, 1852 | |
| Bombus (Alpigenobombus) wurflenii Radoszkowski, 1860 | |
| Bombus (Alpinobombus) balteatus Dahlbom, 1832 | Baltic bumblebee |
| Bombus (Alpinobombus) hyperboreus Schönherr, 1809 | Great arctic bumblebee |
| Bombus (Alpinobombus) neoboreus (Sladen, 1919) | ⇒ Bombus strenuus Cresson, 1863 |
| Bombus (Alpinobombus) polaris Curtis, 1835 | Polar Bumble Bee |
| Bombus (Bombias) auricomus Robertson, 1903 | Black and gold bumble bee |
| Bombus (Bombias) mormonorum Franklin, 1911 | |
| Bombus (Bombias) nevadensis (Cockerell, 1937) | ⇒ Bombus auricomus Robertson, 1903 |
| Bombus (Bombus) affinis Cresson, 1863 | Rusty patch bumble bee |
| Bombus (Bombus) cryptarum Fabricius, 1775 | Cryptic Bumble Bee |
| Bombus (Bombus) franklini Frison, 1921 | Franklin bumble bee |
| Bombus (Bombus) lucorum (Linnaeus, 1761) | ⇒ Bombus lantschouensis Vogt, 1908 |
| Bombus (Bombus) moderatus Cresson, 1863 | |
| Bombus (Bombus) nevadensis Cresson, 1874 | Nevada bumble bee |
| Bombus (Bombus) occidentalis (Greene, 1858) | ⇒ Bombus terricola Kirby, 1837 |
| Bombus (Bombus) patagiatus (Nylander, 1848) | ⇒ Bombus minshanensis Bischoff, 1936 |
| Bombus (Bombus) terrestris (Linnaeus, 1758) | ⇒ Bombus longipennis Friese, 1918 |
| Bombus (Bombus) terricola Kirby, 1837 | Yellow-banded Bumble Bee |
| Bombus (Crotchiibombus) crotchii Cresson, 1878 | Crotch bumble bee |
| Bombus (Cullumanobombus) griseocollis De Geer, 1773 | Brown-belted Bumble Bee |
| Bombus (Cullumanobombus) rufocinctus Cresson, 1863 | Red-belted Bumble Bee |
| Bombus (Fervidobombus) californicus (Smith, 1854) | ⇒ Bombus fervidus Fabricius, 1798 |
| Bombus (Fervidobombus) dahlbomii Guérin-Ménev..., 1835 | |
| Bombus (Fervidobombus) excellens Smith, 1879 | Bunchberry dogwood |
| Bombus (Fervidobombus) fervidus Fabricius, 1798 | Golden Northern Bumble Bee |
| Bombus fervidus fervidus | |
| Bombus (Fervidobombus) medius Cresson, 1863 | |
| Bombus (Fervidobombus) pensylvanicus De Geer, 1773 | American bumble bee |
| Bombus (Fervidobombus) sonorus (Say, 1837) | ⇒ Bombus pensylvanica De Geer, 1773 |
| Bombus (Fraternobombus) fraternus Smith, 1854 | Southern plains bumble bee |
| Bombus (Kallobombus) soroeensis Fabricius, 1776 | Broken-belted Bumble Bee |
| Bombus (Megabombus) argillaceus Scopoli, 1763 | |
| Bombus (Megabombus) hortorum Linnaeus, 1761 | Garden bumblebee |
| Bombus (Megabombus) sylvarum Linnaeus, 1761 | Knapweed Carder Bee |
| Bombus (Melanobombus) lapidarius Linnaeus, 1758 | Large Red-tailed Bumble Bee |
| Bombus (Psithyrus) ashtoni Cresson, 1864 | Ashton cuckoo bumble bee |
| Bombus (Psithyrus) barbutellus Kirby, 1802 | Barbut's Cuckoo Bee |
| Bombus (Psithyrus) bohemicus Seidl, 1837 | Ashton's Cuckoo Bumblebee |
| Bombus (Psithyrus) campestris Panzer, 1801 | Field Cuckoo Bee |
| Bombus (Psithyrus) citrinus Smith, 1854 | Lemon cuckoo bumble bee |
| Bombus (Psithyrus) fernaldae (Franklin, 1911) | ⇒ Bombus flavidus Eversmann, 1852 |
| Bombus (Psithyrus) flavidus Eversmann, 1852 | Fernald Cuckoo Bumble Bee |
| Bombus (Psithyrus) insularis (Smith, 1861) | ⇒ Bombus hypnorum Linnaeus, 1758 |
| Bombus (Psithyrus) norvegicus Sparre-Schne..., 1918 | Norwegian cuckoo bumblebee |
| Bombus (Psithyrus) suckleyi Greene, 1860 | Suckley Cuckoo Bumble Bee |
| Bombus (Psithyrus) variabilis (Cresson, 1872) | ⇒ Bombus humilis Illiger, 1806 |
| Bombus (Pyrobombus) bifarius Cresson, 1878 | Black-notched Bumble Bee |
| Bombus bifarius nearcticus | |
| Bombus (Pyrobombus) bimaculatus Cresson, 1863 | Two-spotted Bumble Bee |
| Bombus (Pyrobombus) caliginosus Frison, 1927 | Fog-belt Bumble Bee |
| Bombus (Pyrobombus) centralis Cresson, 1864 | Central bumble bee |
| Bombus (Pyrobombus) cockerelli Franklin, 1913 | Cockerell's bumble bee |
| Bombus (Pyrobombus) flavifrons Cresson, 1863 | Yellow head bumble bee |
| Bombus (Pyrobombus) frigidus Smith, 1854 | Frigid Bumble Bee |
| Bombus (Pyrobombus) huntii Greene, 1860 | Hunt bumble bee |
| Bombus (Pyrobombus) hypnorum Linnaeus, 1758 | New garden bumblebee |
| Bombus (Pyrobombus) impatiens Cresson, 1863 | Common eastern bumble bee |
| Bombus (Pyrobombus) jonellus Kirby, 1802 | Heath Bumble Bee |
| Bombus (Pyrobombus) lapponicus (Fabricius, 1793) | ⇒ Bombus monticola Smith, 1849 |
| Bombus (Pyrobombus) melanopygus Nylander, 1848 | Black tail bumble bee |
| Bombus (Pyrobombus) mixtus Cresson, 1878 | Fuzzy-horned bumble bee |
| Bombus (Pyrobombus) perplexus (Cresson, 1863) | ⇒ Bombus soroeensis Fabricius, 1776 |
| Bombus (Pyrobombus) pratorum Illiger, 1806 | Apple Bumblebee |
| Bombus (Pyrobombus) rotundiceps Friese, 1916 | |
| Bombus (Pyrobombus) sandersoni Franklin, 1913 | Sanderson bumble bee |
| Bombus (Pyrobombus) sitkensis Nylander, 1848 | Sitka bumble bee |
| Bombus (Pyrobombus) sylvicola Kirby, 1837 | Forest bumble bee |
| Bombus (Pyrobombus) ternarius Say, 1837 | Orange-belted Bumble Bee |
| Bombus (Pyrobombus) vagans Smith, 1854 | Half-black bumble bee |
| Bombus vagans vagans Smith, 1854 | |
| Bombus (Pyrobombus) vandykei Frison, 1927 | Van Dyke bumble bee |
| Bombus (Pyrobombus) vosnesenskii Radoszkowski, 1862 | Vosnesensky bumble bee |
| Bombus (Separatobombus) griseocollis (DeGeer, 1773) | ⇒ Bombus griseocollis De Geer, 1773 |
| Bombus (Separatobombus) morrisoni (Cresson, 1878) | ⇒ Bombus morrisoni Cresson, 1878 |
| Bombus (Subterraneobombus) appositus Cresson, 1878 | Mountain Bumble Bee |
| Bombus (Subterraneobombus) borealis Kirby, 1837 | Northern amber bumble bee |
| Bombus (Subterraneobombus) distinguendus Morawitz, 1869 | Great Yellow Bumble Bee |
| Bombus (Thoracobombus) humilis Illiger, 1806 | Brown-banded carder bee |
| Bombus (Thoracobombus) pascuorum Scopoli, 1763 | Common carder bee |
| Bombus alaskensis (Ashmead, 1902) | ⇒ Bombus flavifrons Cresson, 1863 |
| Bombus dimidiatus (Ashmead, 1902) | ⇒ Bombus flavifrons Cresson, 1863 |
| Bombus edwardsii (Nylander, 1848) | ⇒ Bombus melanopygus Nylander, 1848 |
| Bombus fervidas | Golden Northern Bumble Bee |
| Bombus gelidus (Cresson, 1878) | ⇒ Bombus sylvicola Kirby, 1837 |
| Bombus howardi Cresson, 1863 | |
| Bombus improbus (Cresson, 1878) | ⇒ Bombus nevadensis Cresson, 1874 |
| Bombus juxtus (Cresson, 1878) | ⇒ Bombus centralis Cresson, 1864 |
| Bombus kincaidii Cockerell, 1898 | |
| Bombus kirbiellus (Curtis, 1835) | ⇒ Bombus balteatus Dahlbom, 1832 |
| Bombus kluanensis Williams & C..., 2016 | |
| Bombus mckayi Ashmead, 1902 | |
| Bombus mixtuosus (Ashmead, 1902) | ⇒ Bombus sitkensis Nylander, 1848 |
| Bombus natvigi (Richards, 1931) | ⇒ Bombus hyperboreus Schönherr, 1809 |
| Bombus nigrocinctus (Provancher, 1888) | ⇒ Bombus crotchii Cresson, 1878 |
| Bombus oregonensis (Cresson, 1878) | ⇒ Bombus sitkensis Nylander, 1848 |
| Bombus pennsylvanicus (De Geer, 1773) | ⇒ Bombus pensylvanica De Geer, 1773 |
| Bombus pleuralis Nylander, 1848 | |
| Bombus proavus ♰ T. D. A. Coc..., 1931 | |
| Bombus proximus (Cresson, 1863) | ⇒ Bombus terricola Kirby, 1837 |
| Bombus putnami (Cresson, 1878) | ⇒ Bombus balteatus Dahlbom, 1832 |
| Bombus rufosuffusus (Cockerell, 1905) | ⇒ Bombus huntii Greene, 1860 |
| Bombus separatus Cresson, 1863 | |
| Bombus sg | |
| Bombus titusi Ashmead, 1902 | |
| Bombus vancouverensis (Cresson, 1878) | ⇒ Bombus bifarius Cresson, 1878 |
| Brachymelecta mucida Cresson, 1879 | |
| Brachynomada (Melanomada) annectens Snelling & R..., 1987 | |
| Brachynomada (Melanomada) grindeliae Cockerell, 1903 | |
| Brachynomada (Melanomada) melanantha Linsley, 1939 | |
| Calyptapis florissantensis ♰ T. D. A. Coc..., 1906 | |
| Cemolobus ipomoeae Robertson, 1891 | |
| Centris (Centris) adani Cockerell, 1949 | |
| Centris (Centris) aethyctera Snelling, 1974 | |
| Centris (Heterocentris) vittata Lepeletier, 1841 | |
| Centris (Paracentris) atripes Mocsáry, 1899 | |
| Centris (Paracentris) californica Timberlake, 1940 | |
| Centris (Paracentris) cockerelli Fox, 1899 | |
| Centris cockerelli resoluta (Cockerell, 1923) | ⇒ Centris cockerelli Fox, 1899 |
| Centris (Paracentris) hoffmanseggiae Cockerell, 1897 | |
| Centris (Paracentris) lanosa Cresson, 1872 | |
| Centris (Paracentris) pallida Fox, 1899 | Pallid Bee |
| Centris (Paracentris) rhodopus Cockerell, 1897 | Red-legged Centris |
| Centris (Paracentris) tiburonensis Cockerell, 1923 | |
| Centris (Penthemisia) chilensis Spinola, 1851 | |
| Centris (Wagenknechtia) cineraria Smith, 1854 | |
| Centris rhodomelas Timberlake, 1940 | |
| Centris rhodophus | |
| Ceratina (Ceratinula) arizonensis Cockerell, 1898 | Arizona Ceratina |
| Ceratina (Euceratina) callosa Fabricius, 1794 | |
| Ceratina (Euceratina) dallatorreana Friese, 1896 | Dalla Torre's small carpenter bee |
| Ceratina (Zadontomerus) acantha Provancher, 1895 | Prickly Ceratina |
| Ceratina (Zadontomerus) apacheorum Daly, 1973 | |
| Ceratina (Zadontomerus) calcarata Robertson, 1900 | Spurred Carpenter Bee |
| Ceratina (Zadontomerus) dupla (Say, 1837) | ⇒ Ceratina floridana Mitchell, 1962 |
| Ceratina (Zadontomerus) micheneri Daly, 1973 | |
| Ceratina (Zadontomerus) nanula Cockerell, 1897 | Dwarf Ceratina |
| Ceratina (Zadontomerus) neomexicana Cockerell, 1901 | |
| Ceratina (Zadontomerus) pacifica H. S. Smith, 1907 | |
| Ceratina (Zadontomerus) punctigena van der Vecht, 1952 | |
| Ceratina (Zadontomerus) sequoiae Michener, 1936 | |
| Ceratina (Zadontomerus) strenua Smith, 1879 | Bunchberry dogwood |
| Ceratina (Zadontomerus) timberlakei Daly, 1973 | |
| Ceratina disrupta ♰ T. D. A. Coc..., 1906 | |
| Ceratina hurdi Daly, 1973 | |
| Ceratina mikmaqi Rehan & Shef..., 2011 | Mikmaq Little Carpenter Bee |
| Ceratina submaritima | |
| Ceratina tejonensis Cresson, 1864 | |
| Coquillettapis melittoides Viereck, 1909 | |
| Diadasia (Coquillettapis) afflicta Cresson, 1878 | |
| Diadasia (Coquillettapis) angusticeps Timberlake, 1939 | |
| Diadasia (Coquillettapis) australis Cresson, 1878 | |
| Diadasia (Coquillettapis) bituberculata Cresson, 1878 | |
| Diadasia (Coquillettapis) consociata Timberlake, 1939 | |
| Diadasia (Coquillettapis) diminuta Cresson, 1878 | |
| Diadasia (Coquillettapis) laticauda Cockerell, 1905 | |
| Diadasia (Coquillettapis) lutzi Cockerell, 1924 | |
| Diadasia (Coquillettapis) martialis Timberlake, 1940 | |
| Diadasia (Coquillettapis) megamorpha Cockerell, 1898 | |
| Diadasia (Coquillettapis) nigrifrons Cresson, 1878 | |
| Diadasia (Coquillettapis) nitidifrons Cockerell, 1905 | |
| Diadasia (Coquillettapis) opuntiae Cockerell, 1901 | |
| Diadasia (Coquillettapis) palmarum Timberlake, 1940 | |
| Diadasia (Coquillettapis) rinconis Cockerell, 1897 | |
| Diadasia (Coquillettapis) sphaeralcearum Cockerell, 1905 | |
| Diadasia sphaeralcearum affinis (Timberlake, 1939) | ⇒ Diadasia sphaeralcearum Cockerell, 1905 |
| Diadasia (Coquillettapis) tuberculifrons Timberlake, 1939 | |
| Diadasia (Coquillettapis) vallicola Timberlake, 1940 | |
| Diadasia (Dasiapis) ochracea Cockerell, 1903 | Ochraceous Chimney Bee |
| Diadasia (Dasiapis) tropicalis Cockerell, 1918 | |
| Diadasia (Diadasia) enavata Cresson, 1872 | Sunflower Chimney Bee |
| Diadasia friesei Cockerell, 1898 | |
| Elaphropoda bembidion Lieftinck, 1966 | Cascade cave amphipod |
| Emphoropsis interspersa Cockerell, 1905 | |
| Emphoropsis rugosissima Cockerell, 1905 | |
| Epeolus ainsliei Crawford, 1932 | |
| Epeolus americanus Cresson, 1878 | |
| Epeolus argyreus | |
| Epeolus asperatus Cockerell, 1909 | |
| Epeolus attenboroughi Onuferko, 2018 | |
| Epeolus axillaris Onuferko, 2018 | |
| Epeolus bifasciatus Cresson, 1864 | Two-Banded Cellophane-Cuckoo |
| Epeolus bihamatus | |
| Epeolus californicus | |
| Epeolus compactus Cresson, 1878 | |
| Epeolus gabrielis Cockerell, 1909 | |
| Epeolus hitei Cockerell, 1908 | |
| Epeolus howardi Mitchell, 1962 | |
| Epeolus humillimus Cockerell, 1918 | |
| Epeolus interruptus Robertson, 1900 | |
| Epeolus lectus Cresson, 1878 | |
| Epeolus lutzi Cockerell, 1921 | |
| Epeolus mesillae Cockerell, 1895 | |
| Epeolus minimus Robertson, 1902 | Least Cellophane-Cuckoo Bee |
| Epeolus nebulosus Onuferko, 2018 | |
| Epeolus nevadensis | |
| Epeolus novomexicanus Cockerell, 1912 | |
| Epeolus occidentalis | |
| Epeolus olympiellus Cockerell, 1904 | |
| Epeolus pusillus Cresson, 1864 | Dwarf Cellophane-Cuckoo Bee |
| Epeolus rufulus Cockerell, 1941 | |
| Epeolus scopulus | |
| Epeolus scutellaris Say, 1824 | Notch-Backed Cellophane-Cuckoo Bee |
| Ericrocis arizonensis Baker, 1906 | |
| Ericrocis lata Cresson, 1878 | |
| Ericrocis pintada Snelling & Z..., 1984 | |
| Eucera (Hetereucera) algira Brullé, 1840 | |
| Eucera (Synhalonia) actuosa Cresson, 1878 | |
| Eucera (Synhalonia) albescens Timberlake, 1969 | |
| Eucera (Synhalonia) amsinckiae Timberlake, 1969 | |
| Eucera (Synhalonia) angustifrons Timberlake, 1969 | |
| Eucera (Synhalonia) atriventris Smith, 1854 | |
| Eucera (Synhalonia) belfragei Cresson, 1872 | |
| Eucera (Synhalonia) chrysophila Cockerell, 1914 | |
| Eucera (Synhalonia) cordleyi Viereck, 1905 | |
| Eucera (Synhalonia) dorsata Timberlake, 1969 | |
| Eucera (Synhalonia) edwardsii Cresson, 1878 | |
| Eucera (Synhalonia) frater Cresson, 1878 | Monk Longhorn Bee |
| Eucera (Synhalonia) fulvitarsis Cresson, 1878 | |
| Eucera (Synhalonia) hamata Bradley, 1942 | |
| Eucera (Synhalonia) lepida Cresson, 1878 | |
| Eucera (Synhalonia) lunata Timberlake, 1969 | |
| Eucera (Synhalonia) mohavensis Timberlake, 1969 | |
| Eucera (Synhalonia) quadricincta Timberlake, 1969 | |
| Eucera (Synhalonia) speciosa Cresson, 1878 | |
| Eucera (Synhalonia) truttae Cockerell, 1905 | |
| Eucera acerba Cresson, 1879 | |
| Eucera amoena (Zavortink, 1982) | ⇒ Tetralonia amoena Walker, 1871 |
| Eucera chrysobotryae Cockerell, 1908 | |
| Eucera delphinii Timberlake, 1969 | |
| Eucera lutziana Cockerell, 1933 | |
| Eucera pallidihirta Timberlake, 1969 | |
| Eucera phaceliae Cockerell, 1911 | |
| Eucera pomona Nurse, 1904 | |
| Eucera primiveris Timberlake, 1969 | |
| Eucera stretchii Cresson, 1878 | |
| Eucera territella Cockerell, 1909 | |
| Eucera tricinctella Timberlake, 1969 | |
| Eucera venusta Timberlake, 1961 | |
| Eucera virgata Cockerell, 1905 | |
| Eucera zonata Timberlake, 1969 | |
| Eufriesea chrysopyga Mocsáry, 1898 | |
| Eufriesea macroglossa Moure, 1965 | |
| Euglossa (Euglossa) championi Cheesman, 1929 | |
| Euglossa (Euglossa) purpurea Friese, 1899 | |
| Euglossa (Euglossa) variabilis (Friese, 1899) | ⇒ Euglossa purpurea Friese, 1899 |
| Euglossa (Euglossa) villosiventris Moure, 1968 | |
| Euglossa (Glossura) flammea Moure, 1969 | Alabama well amphipod |
| Euglossa (Glossura) ignita Smith, 1874 | Arnold's dogwood |
| Euglossa (Glossura) imperialis Cockerell, 1922 | |
| Euglossa (Glossurella) gorgonensis Cheesman, 1929 | |
| Euglossa (Glossurella) sapphirina Moure, 1968 | |
| Euglossopteryx biesmeijeri ♰ De Meulemees..., 2014 | |
| Eulaema (Apeulaema) cingulata Fabricius, 1804 | Hairy cockle |
| Eulaema (Apeulaema) marcii Nemésio, 2009 | |
| Eulaema (Eulaema) bombiformis Packard, 1869 | |
| Eulaema (Eulaema) luteola Moure, 1967 | |
| Eulaema (Eulaema) meriana (Olivier, 1789) | ⇒ Eulaema terminata Smith, 1874 |
| Eulaema (Eulaema) seabrai (Moure, 1960) | ⇒ Eulaema bennetti Moure, 1967 |
| Eulaema (Eulaema) speciosa Mocsáry, 1897 | |
| Exaerete frontalis Guérin-Ménev..., 1845 | |
| Exaerete smaragdina Guérin-Ménev..., 1845 | |
| Exomalopsis (Stilbomalopsis) solani Cockerell, 1896 | Solanum Exomalopsis |
| Exomalopsis (Stilbomalopsis) solidaginis Cockerell, 1898 | |
| Exomalopsis dimidiata Timberlake, 1980 | |
| Exomalopsis hurdi Timberlake, 1980 | |
| Florilegus (Florilegus) condignus Cresson, 1878 | |
| Gnathias perbella | |
| Habropoda citula Cockerell, 1929 | |
| Habropoda dammersi Timberlake, 1937 | |
| Habropoda depressa Fowler, 1899 | |
| Habropoda excellens Timberlake, 1962 | |
| Habropoda laboriosa Fabricius, 1804 | Blueberry Habropoda |
| Habropoda miserabilis Cresson, 1878 | |
| Habropoda morrisoni Cresson, 1878 | |
| Habropoda pallida Timberlake, 1937 | Pallid Habropoda |
| Habropoda semifulva Cockerell, 1905 | |
| Habropoda tristissima Cockerell, 1904 | |
| Hesperonomada melanantha | |
| Hexepeolus mojavensis (Linsley & Mi..., 1937) | ⇒ Hexepeolus rhodogyne Linsley & Mi..., 1937 |
| Hexepeolus rhodogyne Linsley & Mi..., 1937 | |
| Holcopasites calliopsidis Linsley, 1943 | Calliopsis Cuckoo Nomad Bee |
| Holcopasites haematurus Cockerell & ..., 1926 | |
| Holcopasites heliopsis Robertson, 1897 | |
| Holcopasites insoletus Linsley, 1942 | |
| Holcopasites pratti | |
| Holcopasites pulchellus Cresson, 1878 | |
| Holcopasites ruthae Cooper, 1993 | |
| Holcopasites stevensi Crawford, 1915 | |
| Leiopodus singularis Linsley & Mi..., 1937 | Singular Chimney-bee-cuckoo |
| Martinapis (Martinapis) luteicornis Cockerell, 1896 | Yellow-horned Morning Long-horned Bee |
| Martinapis (Martinapis) occidentalis Zavortink & ..., 1976 | Western Morning Long-horned Bee |
| Melecta (Melecta) caroli Lieftinck, 1958 | |
| Melecta (Melecta) pacifica Cresson, 1878 | |
| Melecta (Melecta) separata Cresson, 1879 | |
| Melecta (Melectomimus) edwardsii Cresson, 1878 | Edward´s Melecta |
| Melecta alexanderi Griswold & P..., 1999 | |
| Melecta bohartorum Linsley, 1939 | |
| Melecta fulvida | |
| Melecta maculata Cresson, 1879 | |
| Melecta thoracica Cresson, 1875 | |
| Melipona (Melipona) quadrifasciata Lepeletier, 1836 | Stingless bee |
| Melissodes (Apomelissodes) apicata Lovell & Coc..., 1906 | |
| Melissodes (Callimelissodes) ablusa Cockerell, 1926 | |
| Melissodes (Callimelissodes) coloradensis Cresson, 1878 | |
| Melissodes (Callimelissodes) composita Tucker, 1909 | |
| Melissodes (Callimelissodes) glenwoodensis Cockerell, 1905 | |
| Melissodes (Callimelissodes) lupina Cresson, 1878 | |
| Melissodes (Callimelissodes) lustra LaBerge, 1961 | |
| Melissodes (Callimelissodes) metenua Cockerell, 1924 | |
| Melissodes (Callimelissodes) nigracauda LaBerge, 1961 | |
| Melissodes (Callimelissodes) plumosa LaBerge, 1961 | |
| Melissodes (Callimelissodes) stearnsi Cockerell, 1905 | |
| Melissodes (Eumelissodes) agilis Cresson, 1878 | Agile Long-horned Bee |
| Melissodes (Eumelissodes) bicolorata LaBerge, 1961 | |
| Melissodes (Eumelissodes) bimatris LaBerge, 1961 | |
| Melissodes (Eumelissodes) brevipyga LaBerge, 1961 | |
| Melissodes (Eumelissodes) confusa Cresson, 1878 | |
| Melissodes (Eumelissodes) coreopsis Robertson, 1905 | Subterranean clover |
| Melissodes (Eumelissodes) denticulata Smith, 1854 | |
| Melissodes (Eumelissodes) dentiventris Smith, 1854 | |
| Melissodes (Eumelissodes) druriella Kirby, 1802 | |
| Melissodes (Eumelissodes) elegans LaBerge, 1961 | |
| Melissodes (Eumelissodes) fasciatella LaBerge, 1961 | |
| Melissodes (Eumelissodes) gelida LaBerge, 1961 | |
| Melissodes (Eumelissodes) grindeliae Cockerell, 1898 | |
| Melissodes (Eumelissodes) humilior Cockerell, 1903 | |
| Melissodes (Eumelissodes) hymenoxidis Cockerell, 1906 | |
| Melissodes (Eumelissodes) illata Lovell & Coc..., 1906 | |
| Melissodes (Eumelissodes) limbus LaBerge, 1961 | |
| Melissodes (Eumelissodes) lutulenta LaBerge, 1961 | |
| Melissodes (Eumelissodes) melanura Cockerell, 1916 | |
| Melissodes (Eumelissodes) menuachus Cresson, 1868 | |
| Melissodes (Eumelissodes) micheneri LaBerge, 1961 | |
| Melissodes (Eumelissodes) microsticta Cockerell, 1905 | |
| Melissodes (Eumelissodes) monoensis LaBerge, 1961 | |
| Melissodes (Eumelissodes) montana Cresson, 1878 | |
| Melissodes (Eumelissodes) moorei Cockerell, 1926 | |
| Melissodes (Eumelissodes) nivea Robertson, 1895 | |
| Melissodes (Eumelissodes) pallidisignata Cockerell, 1905 | |
| Melissodes (Eumelissodes) paulula LaBerge, 1961 | |
| Melissodes (Eumelissodes) perlusa Cockerell, 1925 | |
| Melissodes (Eumelissodes) persimilis Cockerell, 1949 | |
| Melissodes (Eumelissodes) personatella Cockerell, 1901 | |
| Melissodes (Eumelissodes) pullatella LaBerge, 1961 | |
| Melissodes (Eumelissodes) robustior Cockerell, 1915 | Robust Long-horned Bee |
| Melissodes (Eumelissodes) rufipes LaBerge, 1961 | |
| Melissodes (Eumelissodes) semilupina Cockerell, 1905 | |
| Melissodes (Eumelissodes) snowii Cresson, 1878 | |
| Melissodes (Eumelissodes) subagilis Cockerell, 1905 | |
| Melissodes (Eumelissodes) subillata LaBerge, 1961 | |
| Melissodes (Eumelissodes) submenuacha Cockerell, 1897 | |
| Melissodes (Eumelissodes) trinodis Robertson, 1901 | Dark-Veined Longhorn |
| Melissodes (Eumelissodes) tristis Cockerell, 1894 | |
| Melissodes (Eumelissodes) utahensis LaBerge, 1961 | |
| Melissodes (Eumelissodes) velutina Cockerell, 1916 | |
| Melissodes (Eumelissodes) verbesinarum Cockerell, 1905 | |
| Melissodes (Eumelissodes) vernalis LaBerge, 1961 | |
| Melissodes (Eumelissodes) vernoniae Robertson, 1902 | |
| Melissodes (Eumelissodes) wheeleri Cockerell, 1906 | |
| Melissodes (Heliomelissodes) desponsa Smith, 1854 | Thistle Long-horned Bee |
| Melissodes (Heliomelissodes) rivalis Cresson, 1872 | |
| Melissodes (Melissodes) bimaculata Lepeletier, 1825 | Longhorn Bee |
| Melissodes (Melissodes) colliciata Cockerell, 1910 | |
| Melissodes (Melissodes) communis Cresson, 1878 | Common Long-horned Bee |
| Melissodes (Melissodes) comptoides Robertson, 1898 | Brown-winged Long-horned Bee |
| Melissodes (Melissodes) paroselae (Cockerell, 1905) | ⇒ Melissodes parosetae Cockerell, 1905 |
| Melissodes (Melissodes) tepida Cresson, 1878 | |
| Melissodes (Melissodes) tessellata LaBerge, 1956 | |
| Melissodes (Melissodes) thelypodii Cockerell, 1905 | |
| Melissodes (Tachymelissodes) dagosa Cockerell, 1909 | |
| Melissodes (Tachymelissodes) opuntiella Cockerell, 1911 | |
| Melissodes appressa LaBerge, 1961 | |
| Melissodes aurigenia Cresson, 1879 | |
| Melissodes californica Cresson, 1879 | |
| Melissodes cerussata LaBerge, 1961 | |
| Melissodes clarkiae LaBerge, 1961 | |
| Melissodes comata LaBerge, 1961 | |
| Melissodes dilecta Cresson, 1879 | |
| Melissodes edwardsii Cresson, 1879 | |
| Melissodes excurrens Cockerell, 1903 | |
| Melissodes hurdi LaBerge, 1961 | |
| Melissodes minuscula LaBerge, 1961 | |
| Melissodes nevadensis Cresson, 1874 | |
| Melissodes ochraea LaBerge, 1961 | |
| Melissodes pecosella Cockerell, 1905 | |
| Melissodes perpolita LaBerge, 1961 | |
| Melissodes relucens LaBerge, 1961 | |
| Melissodes saponellus Cockerell, 1908 | |
| Melissodes suavis Cresson, 1879 | |
| Melissodes subfragilis | |
| Melitoma grisella Cockerell & ..., 1899 | |
| Melitoma taurea Say, 1837 | |
| Neolarra abdominalis | |
| Neolarra alba Cockerell, 1916 | |
| Neolarra batrae Shanks, 1978 | |
| Neolarra californica Michener, 1939 | |
| Neolarra cockerelli Crawford, 1916 | |
| Neolarra hurdi Shanks, 1978 | |
| Neolarra linsleyi Michener, 1939 | |
| Neolarra orbiculata Shanks, 1978 | |
| Neolarra penicula Shanks, 1978 | |
| Neolarra pruinosa Ashmead, 1890 | |
| Neolarra ute Griswold & P..., 1999 | |
| Neolarra vandykei Michener, 1939 | |
| Neolarra verbesinae Cockerell, 1895 | |
| Neolarra vigilans Cockerell, 1895 | |
| Neopasites cressoni Crawford, 1916 | |
| Neopasites fulviventris Cresson, 1878 | |
| Neopasites mojavensis Linsley, 1943 | |
| Neopasites punctulatus | |
| Neopasites sierrae Linsley, 1943 | |
| Nogueirapis mirandula Cockerell, 1917 | |
| Nomada (Nomada) denticulata Robertson, 1902 | Denticulate Nomad |
| Nomada (Nomada) fragariae Mitchell, 1962 | |
| Nomada (Nomada) micheneri Schwarz & Gu..., 2004 | |
| Nomada (Nomada) parva Robertson, 1900 | Small Cuckoo Nomad Bee |
| Nomada (Nomada) sulphurata Smith, 1854 | |
| Nomada (Nomadita) placida Cresson, 1863 | |
| Nomada (Xanthidium) coquilletti Cockerell, 1903 | |
| Nomada accepta Cresson, 1878 | |
| Nomada adducta Cresson, 1878 | |
| Nomada agynia Cockerell, 1905 | |
| Nomada albidemaculata Lozinski, 1922 | |
| Nomada alpha Cockerell, 1905 | |
| Nomada angelarum Cockerell, 1903 | |
| Nomada antonita | |
| Nomada aquilarum Cockerell, 1903 | |
| Nomada argentea Schwarz, 1966 | |
| Nomada arizonica Cockerell, 1911 | |
| Nomada armatella Cockerell, 1903 | Armed Cuckoo Nomad Bee |
| Nomada articulata Smith, 1854 | Articulated Nomad |
| Nomada ashmeadi Cockerell, 1903 | |
| Nomada astori Cockerell, 1903 | |
| Nomada atrofrontata Cockerell, 1903 | |
| Nomada australis Mitchell, 1962 | Austral Cuckoo Nomad Bee |
| Nomada avalonica Cockerell, 1938 | |
| Nomada belfragei Cresson, 1878 | |
| Nomada bifasciata Olivier, 1811 | Dusky-horned nomad bee |
| Nomada bifurcata Cockerell, 1903 | |
| Nomada bohartorum Moalif, 1988 | |
| Nomada californiae Cockerell, 1903 | |
| Nomada citrina Cresson, 1878 | |
| Nomada civilis Cresson, 1878 | |
| Nomada clarkii Cresson, 1903 | |
| Nomada collinsiana Cockerell, 1905 | |
| Nomada coloradella Cockerell, 1905 | |
| Nomada coloradensis Cresson, 1903 | |
| Nomada cordleyi Cresson, 1903 | |
| Nomada corvallisensis Cresson, 1903 | |
| Nomada crawfordi Cockerell, 1905 | |
| Nomada cressonii Morawitz, 1877 | Cresson'S Nomad |
| Nomada crotchii Cresson, 1878 | |
| Nomada cuneata Robertson, 1903 | Cuneate Cuckoo Nomad Bee |
| Nomada custeriana Cockerell, 1911 | |
| Nomada cymbalariae Cockerell, 1906 | |
| Nomada davidsoni Cresson, 1903 | |
| Nomada decempunctata Cresson, 1903 | |
| Nomada dentariae Robertson, 1903 | |
| Nomada depressa Cresson, 1863 | Depressed Cuckoo Nomad Bee |
| Nomada dilucida Cresson, 1878 | |
| Nomada discrepans Schmiedeknecht, 1882 | |
| Nomada dreisbachi Mitchell, 1962 | |
| Nomada ednae Cockerell, 1907 | |
| Nomada edwardsii Cresson, 1878 | Edwards´ Nomad Bee |
| Nomada elegantula Cresson, 1903 | |
| Nomada elrodi Cresson, 1903 | |
| Nomada erythrochroa Cresson, 1903 | |
| Nomada erythrospila Cockerell, 1916 | |
| Nomada excellens | |
| Nomada flavoguttata Kirby, 1802 | Little Nomad Bee |
| Nomada florilega Lovell & Coc..., 1905 | Flower Cuckoo Nomad Bee |
| Nomada fontis Cockerell, 1910 | |
| Nomada formula Viereck, 1902 | |
| Nomada fowleri | |
| Nomada fragilis Cresson, 1878 | |
| Nomada frieseana Cockerell, 1904 | |
| Nomada garciana Cockerell, 1907 | |
| Nomada gibbosa Viereck, 1905 | Twining screwstem |
| Nomada gillettei Cockerell, 1905 | |
| Nomada grandis Cresson, 1875 | |
| Nomada grayi Cockerell, 1903 | |
| Nomada gutierreziae Cockerell, 1896 | |
| Nomada hemphilli Cockerell, 1903 | |
| Nomada hesperia Cockerell, 1903 | |
| Nomada hirtiventris Schwarz, 1990 | |
| Nomada hoodiana Cockerell, 1903 | |
| Nomada illinoensis (Robertson, 1900) | ⇒ Nomada illinoiensis Robertson, 1900 |
| Nomada imbricata Smith, 1854 | Imbricate Cuckoo Nomad Bee |
| Nomada interruptella Fowler, 1902 | |
| Nomada jennei Cockerell, 1906 | |
| Nomada jocularis Cresson, 1879 | |
| Nomada kincaidiana Cockerell, 1903 | |
| Nomada klamathensis Fox, 1926 | |
| Nomada lamarensis Cockerell, 1905 | |
| Nomada latifrons Cockerell, 1903 | |
| Nomada lehighensis Cockerell, 1903 | Lehigh Gap Cuckoo Nomad Bee |
| Nomada lepida Cresson, 1863 | Charming Cuckoo Nomad Bee |
| Nomada leucophthalma Kirby, 1802 | Early Nomad |
| Nomada lewisi Cockerell, 1903 | |
| Nomada libata Cresson, 1878 | |
| Nomada linsleyi Evans, 1972 | |
| Nomada longicornis Friese, 1920 | |
| Nomada louisianae Cockerell, 1903 | |
| Nomada luteola Olivier, 1811 | Littleleaf mockorange |
| Nomada luteoloides (Robertson, 1895) | ⇒ Nomada sulphurata Smith, 1854 |
| Nomada luteopicta Cockerell, 1905 | |
| Nomada maculata Cresson, 1863 | Spotted Nomad Bee |
| Nomada magnifica | |
| Nomada malonella Cockerell, 1910 | |
| Nomada malonina Cockerell, 1910 | |
| Nomada marginella Cockerell, 1903 | |
| Nomada mckenziei Timberlake &..., 1937 | |
| Nomada melanoptera Cockerell, 1921 | |
| Nomada melanosoma Cockerell, 1916 | |
| Nomada melliventris Cresson, 1878 | |
| Nomada mera | |
| Nomada modocorum | |
| Nomada morrisoni Cresson, 1878 | |
| Nomada munda Cresson, 1878 | |
| Nomada mutans Cockerell, 1910 | |
| Nomada obliquella Fowler, 1902 | |
| Nomada obliterata Cresson, 1863 | Obliterated Cuckoo Nomad Bee |
| Nomada obscurella Fowler, 1902 | |
| Nomada odontocera Cockerell, 1916 | |
| Nomada opacella Timberlake, 1954 | |
| Nomada opposita Cresson, 1878 | |
| Nomada orbitalis Perez, 1913 | |
| Nomada oregonica Cockerell, 1903 | |
| Nomada ornithica Cockerell, 1906 | |
| Nomada ovata Robertson, 1903 | Orange-Tailed Nomad |
| Nomada pacata | |
| Nomada packardiella Cockerell, 1906 | |
| Nomada pallidella Cockerell, 1905 | |
| Nomada pallidelutea Swenk, 1915 | |
| Nomada panzeri Lepeletier, 1841 | Panzer's nomad bee |
| Nomada parata Cresson, 1878 | |
| Nomada parkeri Evans, 1972 | |
| Nomada pascoensis Cockerell, 1903 | |
| Nomada pecosensis Cockerell, 1903 | |
| Nomada perbella Viereck, 1905 | |
| Nomada perplexa Cresson, 1863 | |
| Nomada perplexans Cockerell, 1910 | |
| Nomada physura Cockerell, 1903 | |
| Nomada psilocera Kohl, 1908 | |
| Nomada pulsatillae Cockerell, 1906 | |
| Nomada putnami Cresson, 1876 | |
| Nomada pygmaea Cresson, 1863 | Pygmy Cuckoo Nomad Bee |
| Nomada pyrrha Cockerell, 1916 | |
| Nomada rhodalis Cockerell, 1903 | |
| Nomada rhodomelas Cockerell, 1903 | |
| Nomada rhodosoma Cockerell, 1903 | |
| Nomada rhodotricha Cockerell, 1903 | |
| Nomada rhodoxantha Cockerell, 1905 | |
| Nomada ridingsii Cresson, 1878 | |
| Nomada rivalis Cresson, 1878 | |
| Nomada robertsonella Cockerell, 1903 | |
| Nomada rohweri Cockerell, 1906 | |
| Nomada rubi Swenk, 1915 | |
| Nomada rubicunda Olivier, 1811 | Littleleaf mockorange |
| Nomada rubrella Cockerell, 1905 | |
| Nomada rufipes Fabricius, 1793 | Black-horned nomad bee |
| Nomada sanctaecrucis Cockerell, 1903 | |
| Nomada sayi Robertson, 1893 | |
| Nomada schwarzi Cockerell, 1903 | |
| Nomada scita Cresson, 1878 | |
| Nomada scitiformis Cockerell, 1903 | |
| Nomada sedae (Cockerell, 1919) | ⇒ Nomada sedi Cockerell, 1919 |
| Nomada semiscita Cockerell, 1904 | |
| Nomada semisuavis Cockerell, 1910 | |
| Nomada snowii Cresson, 1878 | |
| Nomada sophiarum Cockerell, 1903 | |
| Nomada suavis Cresson, 1878 | |
| Nomada subaccepta Cockerell, 1907 | |
| Nomada subangusta Cockerell, 1903 | |
| Nomada subgracilis Cockerell, 1903 | |
| Nomada subrubi Swenk, 1915 | |
| Nomada subsimilis Cockerell, 1903 | |
| Nomada subvicinalis Cockerell, 1903 | |
| Nomada suda Cresson, 1879 | |
| Nomada superba Cresson, 1863 | Superb Nomada |
| Nomada taraxacella Cockerell, 1903 | |
| Nomada texana Cresson, 1872 | Texas Nomad Bee |
| Nomada timberlakei Broemeling, 1989 | |
| Nomada tintinnabulum Cockerell, 1903 | |
| Nomada uhleri Cockerell, 1905 | |
| Nomada ulsterensis Mitchell, 1962 | |
| Nomada ultima Cockerell, 1903 | |
| Nomada ultimella Cockerell, 1903 | |
| Nomada undulaticornis Cockerell, 1906 | |
| Nomada utahensis Moalif, 1988 | Utah Nomada |
| Nomada utensis Swenk, 1913 | |
| Nomada valida Smith, 1854 | True Cuckoo Nomad Bee |
| Nomada vegana (Cockerell, 1903) | ⇒ Nomada modesta Cresson, 1863 |
| Nomada verecunda Cresson, 1879 | |
| Nomada vexator Cockerell, 1909 | |
| Nomada vicinalis Cresson, 1878 | |
| Nomada vierecki Cockerell, 1903 | |
| Nomada vincta Say, 1837 | Bounded Cuckoo Nomad Bee |
| Nomada vinnula | |
| Nomada washingtoni Cockerell, 1903 | |
| Nomada xantholepis Cockerell, 1911 | |
| Nomada zebrata Cresson, 1878 | |
| Oreopasites (Oreopasites) arizonica Linsley, 1941 | |
| Oreopasites (Oreopasites) scituli Cockerell, 1906 | |
| Oreopasites (Oreopasites) vanduzeei Cockerell, 1925 | |
| Oreopasites hurdi Rozen, 1992 | |
| Oreopasites powelli Rozen, 1992 | |
| Paranomada californica Linsley, 1945 | |
| Paratetrapedia nigriceps Friese, 1899 | |
| Paratrigona (Paratrigona) ornaticeps (Schwarz, 1938) | ⇒ Paratrigona guigliae Moure, 1960 |
| Partamona (Partamona) musarum Cockerell, 1917 | |
| Partamona (Partamona) orizabaensis Strand, 1919 | |
| Peponapis (Peponapis) pruinosa Say, 1837 | Eastern cucurbit bee |
| Peponapis (Xenopeponapis) timberlakei Hurd & Linsley, 1964 | |
| Plebeia llorentei Ayala, 1999 | |
| Plebeia poecilochroa Moure & Camargo, 1995 | |
| Protomelecta brevipennis ♰ T. D. A. Coc..., 1908 | |
| Ptilothrix bombiformis Cresson, 1878 | Hibiscus Bee |
| Pyrrhomelecta anthophorae | |
| Rhopalolemma robertsi Roig-Alsina, 1991 | |
| Scaptotrigona luteipennis Friese, 1901 | |
| Scaptotrigona polysticta Moure, 1950 | Norton stygobromid |
| Svastra (Anthedonia) compta Cresson, 1878 | |
| Svastra (Brachymelissodes) cressonii Dalla Torre, 1896 | |
| Svastra (Epimelissodes) helianthelli Cockerell, 1905 | |
| Svastra (Epimelissodes) machaerantherae Cockerell, 1904 | |
| Svastra (Epimelissodes) obliqua Say, 1837 | Oblique Longhorn |
| Svastra (Epimelissodes) sabinensis Cockerell, 1924 | |
| Svastra pallidior LaBerge, 1963 | |
| Svastra sila LaBerge, 1956 | |
| Synhalonia edwardsii (Cresson, 1878) | ⇒ Eucera edwardsii Cresson, 1878 |
| Tetragona dorsalis Smith, 1854 | |
| Tetragona ziegleri Friese, 1900 | Stingless bee |
| Tetragonisca angustula Latreille, 1825 | |
| Tetralonia poetica Cockerell, 1914 | |
| Tetraloniella (Tetraloniella) albata Cresson, 1872 | |
| Tetraloniella (Tetraloniella) crenulaticornis Cockerell, 1898 | |
| Tetraloniella (Tetraloniella) distata LaBerge, 2001 | |
| Tetraloniella (Tetraloniella) eriocarpi Cockerell, 1898 | |
| Tetraloniella (Tetraloniella) lanzarotensis Tkalcu, 1993 | |
| Tetraloniella (Tetraloniella) paenalbata LaBerge, 2001 | |
| Tetraloniella (Tetraloniella) pomonae Cockerell, 1915 | |
| Tetraloniella (Tetraloniella) spissa Cresson, 1872 | |
| Tetraloniella (Tetraloniella) vandykei LaBerge, 2001 | |
| Tetraloniella cressoniana Cockerell, 1905 | |
| Tetraloniella pennata LaBerge, 2001 | |
| Thyreus sphenophorus Lieftinck, 1962 | |
| Townsendiella californica Michener, 1936 | |
| Townsendiella pulchra Crawford, 1916 | |
| Townsendiella rufiventris Linsley, 1942 | |
| Triepeolus ancoratus Cockerell, 1916 | |
| Triepeolus antiochensis Rightmyer, 2008 | |
| Triepeolus argentimus Rightmyer, 2008 | |
| Triepeolus balteatus Cockerell, 1921 | |
| Triepeolus concavus (Cresson, 1878) | ⇒ Doeringiella concava |
| Triepeolus custeri Cockerell, 1926 | |
| Triepeolus cyclurus Cockerell, 1923 | |
| Triepeolus dacotensis Stevens, 1919 | |
| Triepeolus denverensis Cockerell, 1910 | |
| Triepeolus diffusus Rightmyer, 2008 | |
| Triepeolus distinctus Cresson, 1878 | |
| Triepeolus diversipes Cockerell, 1924 | |
| Triepeolus donatus Smith, 1854 | Thistle Longhorn-Cuckoo |
| Triepeolus eldoradensis Cockerell, 1910 | |
| Triepeolus fraserae (Cockerell, 1904) | ⇒ Triepeolus cressonii Robertson, 1897 |
| Triepeolus gabrielis | |
| Triepeolus grandis Friese, 1917 | |
| Triepeolus grindeliae Cockerell, 1907 | |
| Triepeolus helianthi Robertson, 1897 | Sunflower Cuckoo Nomad Bee |
| Triepeolus joliae Rightmyer, 2008 | |
| Triepeolus lectiformis Cockerell, 1925 | |
| Triepeolus loomisorum Rozen, 1989 | |
| Triepeolus lunatus Say, 1824 | |
| Triepeolus lusor Cockerell, 1925 | |
| Triepeolus martini Cockerell, 1900 | |
| Triepeolus matildae Rightmyer, 2014 | |
| Triepeolus melanarius Rightmyer, 2008 | |
| Triepeolus micropygius Robertson, 1903 | |
| Triepeolus monardae Mitchell, 1962 | |
| Triepeolus norae Cockerell, 1907 | |
| Triepeolus occidentalis Cresson, 1878 | |
| Triepeolus paenepectoralis Viereck, 1905 | Twining screwstem |
| Triepeolus parvus Rightmyer, 2008 | |
| Triepeolus pectoralis Robertson, 1897 | Goldenrod Longhorn-Cuckoo Bee |
| Triepeolus perpictus Rightmyer, 2008 | |
| Triepeolus punctoclypeus Rightmyer, 2008 | |
| Triepeolus remigatus Fabricius, 1804 | Hairy cockle |
| Triepeolus rhododontus Cockerell, 1921 | |
| Triepeolus rohweri Cockerell, 1911 | |
| Triepeolus sarothrinus Cockerell, 1929 | |
| Triepeolus segregatus Cockerell, 1900 | |
| Triepeolus simplex Robertson, 1903 | Simple Longhorn-Cuckoo |
| Triepeolus subalpinus Cockerell, 1910 | |
| Triepeolus subnitens Cockerell & ..., 1929 | |
| Triepeolus tanneri Cockerell, 1928 | |
| Triepeolus texanus Cresson, 1878 | |
| Triepeolus timberlakei Cockerell, 1929 | |
| Triepeolus townsendi Cockerell, 1907 | |
| Triepeolus utahensis Cockerell, 1921 | |
| Triepeolus verbesinae Cockerell, 1897 | |
| Trigona necrophaga Camargo & Ro..., 1991 | |
| Trigona silvestriana Vachal, 1908 | |
| Trigonisca (Trigonisca) pipioli Ayala, 1999 | |
| Triopasites penniger Cockerell, 1894 | |
| Xenoglossa (Euxenoglossa) kansensis Cockerell, 1905 | Kansas Squash Bee |
| Xenoglossa (Euxenoglossa) strenua Cresson, 1878 | |
| Xenoglossa (Xenoglossa) angustior Cockerell, 1899 | |
| Xenoglossa (Xenoglossa) patricia Cockerell, 1896 | |
| Xenoglossa mustelina Fox, 1893 | |
| Xeromelecta (Melectomorpha) californica Cresson, 1878 | California Xeromelecta |
| Xeromelecta (Melectomorpha) interrupta Cresson, 1872 | Interrupted Xeromelecta |
| Xeromelecta (Xeromelecta) larreae Cockerell, 1900 | Larrea Xeromelecta |
| Xylocopa (Neoxylocopa) brasilianorum Linnaeus, 1767 | Arnold's dogwood |
| Xylocopa (Neoxylocopa) varipuncta Patton, 1879 | Valley carpenter bee |
| Xylocopa (Notoxylocopa) tabaniformis Smith, 1854 | Arnold's dogwood |
| Xylocopa tabaniformis sylvicola O´Brien & Hurd, 1965 | |
| Xylocopa (Xylocopoides) californica Cresson, 1864 | California carpenter bee |
| Xylocopa californica diamesa Hurd, 1954 | |
| Xylocopa (Xylocopoides) virginica Linnaeus, 1771 | Carpenter bee |
| Xylocopa gabrielae ♰ M. S. Engel, 2001 | |
| Xylocopa libocedri | |
| Zacosmia maculata Cresson, 1879 | |
