| Afranthidium (Immanthidium) repetitum Schulz, 1906 | Carder bee |
| Afranthidium abdominale Friese, 1904 | |
| Afranthidium braunsi Friese, 1904 | |
| Afroheriades prima Peters, 1970 | |
| Alcidamea mucronata Cockerell, 1934 | |
| Alcidamea producta Cresson, 1864 | |
| Alcidamea truncata (Cresson, 1878) | ⇒ Hoplitis truncata Cresson, 1878 |
| Andronicus cylindricus Cresson, 1864 | |
| Anthidiellum (Loyolanthidium) ehrhorni Cockerell, 1900 | |
| Anthidiellum (Loyolanthidium) eiseni Cockerell, 1913 | |
| Anthidiellum (Loyolanthidium) notatum Latreille, 1809 | Cancellate semele |
| Anthidiellum notatum boreale (Robertson, 1902) | ⇒ Anthidiellum notatum Latreille, 1809 |
| Anthidiellum notatum gilense (Cockerell, 1897) | ⇒ Anthidiellum notatum Latreille, 1809 |
| Anthidiellum notatum notatum Latreille, 1809 | Eastern Rotund-Resin Bee |
| Anthidiellum notatum robertsoni (Cockerell, 1904) | ⇒ Anthidiellum notatum Latreille, 1809 |
| Anthidiellum notatum rufimaculatum (Schwarz, 1926) | ⇒ Anthidiellum notatum Latreille, 1809 |
| Anthidiellum (Loyolanthidium) perplexum Smith, 1854 | |
| Anthidiellum apicale Cresson, 1878 | |
| Anthidiellum azteca Urban, 2001 | |
| Anthidiellum gilense Cockerell, 1897 | |
| Anthidiellum robertsoni Cockerell, 1904 | |
| Anthidium (Anthidium) atripes Cresson, 1879 | |
| Anthidium (Anthidium) banningense Cockerell, 1904 | |
| Anthidium (Anthidium) chilense Spinola, 1851 | |
| Anthidium (Anthidium) clypeodentatum Swenk, 1914 | |
| Anthidium (Anthidium) cockerelli Schwarz, 1928 | |
| Anthidium (Anthidium) collectum Huard, 1896 | |
| Anthidium (Anthidium) dammersi Cockerell, 1937 | |
| Anthidium (Anthidium) diadema Latreille, 1809 | Apache bush |
| Anthidium (Anthidium) edwardsii Cresson, 1878 | Edwards´ Wool-carder Bee |
| Anthidium (Anthidium) emarginatum Say, 1824 | |
| Anthidium (Anthidium) florentinum Fabricius, 1775 | Wool carder bee |
| Anthidium (Anthidium) jocosum Cresson, 1878 | |
| Anthidium (Anthidium) maculifrons Smith, 1854 | Spot-fronted Wool-carder Bee |
| Anthidium (Anthidium) maculosum Cresson, 1878 | |
| Anthidium (Anthidium) manicatum Linnaeus, 1758 | Continental Wool-carder Bee |
| Anthidium (Anthidium) mormonum Cresson, 1878 | |
| Anthidium (Anthidium) palliventre Cresson, 1878 | |
| Anthidium (Anthidium) palmarum Cockerell, 1904 | |
| Anthidium (Anthidium) paroselae Cockerell, 1898 | |
| Anthidium (Anthidium) placitum Cresson, 1879 | |
| Anthidium (Anthidium) porterae Cockerell, 1900 | Porter´s Wool-carder Bee |
| Anthidium (Anthidium) psoraleae Robertson, 1902 | |
| Anthidium (Anthidium) punctatum Latreille, 1809 | Apache bush |
| Anthidium (Anthidium) sonorense Cockerell, 1923 | |
| Anthidium (Anthidium) tenuiflorae Cockerell, 1907 | |
| Anthidium (Anthidium) utahense Swenk, 1914 | Utah Wool-carder Bee |
| Anthidium (Callanthidium) formosum Cresson, 1878 | |
| Anthidium (Callanthidium) illustre Cresson, 1879 | |
| Anthidium (Proanthidium) oblongatum Illiger, 1806 | Oblong wool carder bee |
| Anthidium (Turkanthidium) unicum Morawitz, 1875 | |
| Anthidium albiventre (Latreille, 1809) | ⇒ Anthidium diadema Latreille, 1809 |
| Anthidium andinum Jörgensen, 1912 | |
| Anthidium angelarum Titus, 1906 | |
| Anthidium ardens Smith, 1879 | Bunchberry dogwood |
| Anthidium atrifrons (Say, 1824) | ⇒ Anthidium emarginata Say, 1824 |
| Anthidium atriventre Cresson, 1878 | |
| Anthidium bifidum Pasteels, 1969 | |
| Anthidium blanditum Cresson, 1879 | |
| Anthidium californicum Cresson, 1879 | |
| Anthidium caspicum Morawitz, 1880 | |
| Anthidium cochimi Snelling, 1992 | |
| Anthidium cognatum Cresson, 1878 | |
| Anthidium conspicuum Cresson, 1879 | |
| Anthidium cordiforme Friese, 1922 | Malheur Cave amphipod |
| Anthidium crassidens Cameron, 1905 | |
| Anthidium depressum H.F.Schwarz, 1927 | |
| Anthidium duomarginatum Gonzalez & G..., 2013 | |
| Anthidium echinatum Klug, 1832 | |
| Anthidium exhumatum ♰ Cockerell, 1906 | |
| Anthidium harbecki Crawford, 1910 | |
| Anthidium insulare (Morawitz, 1873) | ⇒ Eoanthidium insulare Morawitz, 1873 |
| Anthidium labergei Gonzalez & G..., 2013 | |
| Anthidium laeve Pasteels, 1969 | |
| Anthidium longispinum H.F.Schwarz, 1927 | |
| Anthidium michenerorum Gonzalez & G..., 2013 | |
| Anthidium montivagum (Cresson, 1878) | ⇒ Anthidium emarginatum Say, 1824 |
| Anthidium nanum Mocsáry, 1879 | Bee |
| Anthidium occidentale Kasparek, 2021 | |
| Anthidium pallidiclypeum Jaycox, 1963 | |
| Anthidium paraoselae | |
| Anthidium pudens Cresson, 1879 | |
| Anthidium rodecki Schwarz, 1934 | |
| Anthidium rohweri H.F.Schwarz, 1927 | |
| Anthidium rozeni Urban, 2001 | |
| Anthidium scudderi ♰ Cockerell, 1906 | |
| Anthidium senile (Eversmann, 1852) | ⇒ Anthidium punctatum Latreille, 1809 |
| Anthidium severini Vachal, 1903 | |
| Anthidium taeniatum Latreille, 1809 | Apache bush |
| Anthidium texanum Cresson, 1878 | |
| Anthidium venustum (Morawitz, 1878) | ⇒ Dianthidium cressonii Dalla Torre, 1896 |
| Anthocopa copelandica (Cockerell, 1908) | ⇒ Atoposmia copelandica Cockerell, 1908 |
| Anthocopa hypostomalis (Michener, 1949) | ⇒ Atoposmia hypostomalis Michener, 1949 |
| Ashmeadiella (Arogochila) australis Cockerell, 1902 | |
| Ashmeadiella (Arogochila) barberi Michener, 1939 | |
| Ashmeadiella (Arogochila) breviceps Michener, 1939 | |
| Ashmeadiella (Arogochila) cazieri Michener, 1939 | |
| Ashmeadiella (Arogochila) erema Michener, 1939 | |
| Ashmeadiella (Arogochila) eurynorhyncha Michener, 1939 | |
| Ashmeadiella (Arogochila) foxiella Michener, 1939 | |
| Ashmeadiella (Arogochila) inyoensis Michener, 1939 | |
| Ashmeadiella (Arogochila) micheneri Snelling, 1962 | |
| Ashmeadiella (Arogochila) neomexicana Cockerell, 1904 | |
| Ashmeadiella (Arogochila) salviae Michener, 1939 | |
| Ashmeadiella (Arogochila) timberlakei Michener, 1936 | |
| Ashmeadiella (Ashmeadiella) altadenae Michener, 1936 | |
| Ashmeadiella (Ashmeadiella) aridula Cockerell, 1910 | |
| Ashmeadiella (Ashmeadiella) bigeloviae Cockerell, 1897 | |
| Ashmeadiella (Ashmeadiella) bucconis Say, 1837 | |
| Ashmeadiella (Ashmeadiella) cactorum (Cockerell, 1897) | ⇒ Ashmeadiella aridula Cockerell, 1910 |
| Ashmeadiella (Ashmeadiella) californica Ashmead, 1897 | |
| Ashmeadiella (Ashmeadiella) cubiceps Cresson, 1879 | |
| Ashmeadiella (Ashmeadiella) difugita Michener, 1939 | |
| Ashmeadiella (Ashmeadiella) dimalla Michener, 1939 | |
| Ashmeadiella (Ashmeadiella) femorata Michener, 1936 | |
| Ashmeadiella (Ashmeadiella) foveata Michener, 1939 | |
| Ashmeadiella (Ashmeadiella) gillettei Titus, 1904 | |
| Ashmeadiella (Ashmeadiella) leucozona Cockerell, 1924 | |
| Ashmeadiella (Ashmeadiella) maxima Michener, 1936 | |
| Ashmeadiella (Ashmeadiella) occipitalis Michener, 1939 | |
| Ashmeadiella (Ashmeadiella) opuntiae Cockerell, 1897 | |
| Ashmeadiella (Ashmeadiella) pronitens Cockerell, 1906 | |
| Ashmeadiella (Ashmeadiella) prosopidis Cockerell, 1897 | |
| Ashmeadiella (Ashmeadiella) rufipes Titus, 1904 | |
| Ashmeadiella (Ashmeadiella) sonora Michener, 1939 | |
| Ashmeadiella (Ashmeadiella) stevensi Michener, 1937 | |
| Ashmeadiella (Chilosmia) rhodognatha Cockerell, 1924 | |
| Ashmeadiella (Cubitognatha) xenomastax Michener, 1939 | |
| Ashmeadiella (Isosmia) rubrella Michener, 1949 | |
| Ashmeadiella astragali | |
| Ashmeadiella biscopula Michener, 1939 | |
| Ashmeadiella chumashae Griswold, 1985 | |
| Ashmeadiella clypeodentata Michener, 1936 | |
| Ashmeadiella cockerelli Michener, 1936 | |
| Ashmeadiella coquilletti Titus, 1904 | |
| Ashmeadiella digiticauda Cockerell, 1924 | |
| Ashmeadiella echinocerei Cockerell, 1911 | |
| Ashmeadiella floridana Robertson, 1897 | |
| Ashmeadiella gilletei | |
| Ashmeadiella holtii Cockerell, 1898 | |
| Ashmeadiella howardi Cockerell, 1910 | |
| Ashmeadiella hurdiana Michener, 1954 | |
| Ashmeadiella lateralis Michener, 1936 | |
| Ashmeadiella leachi Michener, 1949 | |
| Ashmeadiella lutzi Cockerell, 1930 | |
| Ashmeadiella meliloti Cockerell, 1897 | |
| Ashmeadiella parkinsoniae Parker, 1977 | |
| Ashmeadiella rufitarsis Michener, 1939 | |
| Ashmeadiella schwarzi Titus, 1904 | |
| Ashmeadiella sculleni Michener, 1939 | |
| Ashmeadiella stenognatha Michener, 1939 | |
| Ashmeadiella titusi Michener, 1939 | |
| Ashmeadiella truncativentris Michener, 1951 | |
| Ashmeadiella vandykiella Michener, 1949 | |
| Ashmeadiella washingtonensis Michener, 1939 | |
| Atoposmia (Atoposmia) abjecta Cresson, 1878 | |
| Atoposmia (Atoposmia) anthodyta Michener, 1943 | |
| Atoposmia (Atoposmia) elongata Michener, 1936 | |
| Atoposmia (Atoposmia) oregona Michener, 1943 | |
| Atoposmia (Atoposmia) panamintensis Michener, 1943 | |
| Atoposmia (Atoposmia) pycnognatha Michener, 1943 | |
| Atoposmia (Eremosmia) beameri Michener, 1951 | |
| Atoposmia (Eremosmia) daleae Michener, 1951 | |
| Atoposmia (Eremosmia) enceliae Cockerell, 1935 | |
| Atoposmia (Eremosmia) hypostomalis Michener, 1949 | |
| Atoposmia (Eremosmia) maryae Michener, 1949 | |
| Atoposmia (Eremosmia) mirifica Michener, 1954 | |
| Atoposmia (Eremosmia) nitidivitta Michener, 1943 | |
| Atoposmia (Eremosmia) robustula Cockerell, 1935 | |
| Atoposmia (Eremosmia) rupestris Cockerell, 1935 | |
| Atoposmia (Eremosmia) timberlakei Cockerell, 1935 | |
| Atoposmia (Eremosmia) viguierae Cockerell, 1935 | |
| Atoposmia (Hexosmia) copelandica Cockerell, 1908 | |
| Atoposmia arizonensis Michener, 1954 | |
| Atoposmia hebitis Michener, 1954 | |
| Atoposmia hemizoniae Cockerell, 1935 | |
| Atoposmia namatophila Michener, 1954 | |
| Atoposmia phaceliarum Cockerell, 1935 | |
| Atoposmia segregata Michener, 1954 | |
| Atoposmia triodonta Cockerell, 1935 | |
| Atoposomia robustula | |
| Chalicodoma (Callomegachile) rufipennis Fabricius, 0 | |
| Chalicodoma (Gronoceras) felina | |
| Chalicodoma (Pseudomegachile) lanata (Fabricius, 1775) | ⇒ Megachile lanata Fabricius, 1775 |
| Chalicodoma davidsoni Cockerell, 1902 | |
| Chalicodoma georgica Cresson, 1878 | |
| Chalicodoma subexilis Cockerell, 1908 | |
| Chelostoma (Chelostoma) florisomne (Linnaeus, 1758) | ⇒ Chelostoma campanularum Kirby, 1802 |
| Chelostoma (Foveosmia) californicum Cresson, 1878 | |
| Chelostoma (Foveosmia) campanularum Kirby, 1802 | Carpenter bee |
| Chelostoma (Foveosmia) minutum Crawford, 1916 | |
| Chelostoma (Foveosmia) phaceliae Michener, 1938 | |
| Chelostoma (Gyrodromella) rapunculi Lepeletier, 1841 | Rampion Scissor Bee |
| Chelostoma (Prochelostoma) philadelphi Robertson, 1891 | Mock-Orange Scissor Bee |
| Chelostoma bernardinum Michener, 1938 | |
| Chelostoma cockerelli Michener, 1938 | |
| Chelostoma incisulum Michener, 1938 | |
| Chelostoma marginatum Michener, 1938 | Long-legged cave amphipod |
| Chelostoma tetramerum Michener, 1942 | |
| Chelynia calliphorina Cockerell, 1911 | |
| Chelynia rubifloris Cockerell, 1898 | |
| Chrysopheon aurifuscus Titus, 1901 | |
| Coelioxys (Acrocoelioxys) dolichos Fox, 1890 | Carpenter-mimic Cuckoo-leaf-cutter |
| Coelioxys (Acrocoelioxys) producta Cresson, 1865 | |
| Coelioxys (Allocoelioxys) brevis (Eversmann, 1852) | ⇒ Coelioxys octodentata Say, 1824 |
| Coelioxys (Allocoelioxys) coturnix Perez, 1884 | Red-tailed Cuckoo-leaf-cutter |
| Coelioxys (Boreocoelioxys) banksi Crawford, 1914 | |
| Coelioxys (Boreocoelioxys) funeraria Smith, 1854 | |
| Coelioxys (Boreocoelioxys) insita Cresson, 1872 | |
| Coelioxys (Boreocoelioxys) moesta Cresson, 1864 | |
| Coelioxys (Boreocoelioxys) octodentata Say, 1824 | Eight-toothed Cuckoo-leaf-cutter |
| Coelioxys (Boreocoelioxys) porterae Cockerell, 1900 | Porter'S Cuckoo Leaf-Cutter Bee |
| Coelioxys (Boreocoelioxys) pratti Crawford, 1914 | |
| Coelioxys (Boreocoelioxys) rufitarsis Smith, 1854 | Red-Footed Cuckoo Leaf-Cutter Bee |
| Coelioxys (Boreocoelioxys) salinaria Cockerell, 1925 | |
| Coelioxys (Boreocoelioxys) sayi Robertson, 1897 | Say'S Cuckoo Leaf-Cutter Bee |
| Coelioxys (Coelioxys) hirsutissima Cockerell, 1912 | |
| Coelioxys (Coelioxys) immaculata Cockerell, 1912 | |
| Coelioxys (Coelioxys) reginae Cockerell, 1905 | |
| Coelioxys (Coelioxys) rufescens Lepeletier &..., 1825 | Rufescent Sharp-Tail |
| Coelioxys (Coelioxys) serricaudata Baker, 1975 | |
| Coelioxys (Coelioxys) sodalis Cresson, 1878 | Comrade Cuckoo Leafcutter Bee |
| Coelioxys (Cyrtocoelioxys) deani Cockerell, 1909 | |
| Coelioxys (Cyrtocoelioxys) gilensis Cockerell, 1896 | |
| Coelioxys (Cyrtocoelioxys) gonaspis Cockerell, 1924 | |
| Coelioxys (Cyrtocoelioxys) hunteri Crawford, 1914 | Hunter´s Cuckoo-leaf-cutter |
| Coelioxys (Cyrtocoelioxys) modesta Smith, 1854 | Modest Cuckoo-leaf-cutter |
| Coelioxys (Cyrtocoelioxys) obtusiventris Crawford, 1914 | |
| Coelioxys (Cyrtocoelioxys) scitula Cresson, 1872 | |
| Coelioxys (Glyptocoelioxys) germana Cresson, 1878 | |
| Coelioxys (Glyptocoelioxys) pergandei Schletterer, 1890 | Convergent lady beetle |
| Coelioxys (Haplocoelioxys) mexicana Cresson, 1878 | Mexican Cuckoo-leaf-cutter |
| Coelioxys (Neocoelioxys) abdominalis Guérin-Ménev..., 1845 | |
| Coelioxys (Neocoelioxys) menthae Cockerell, 1897 | |
| Coelioxys (Neocoelioxys) slossoni Viereck, 1902 | |
| Coelioxys (Synocoelioxys) alternata Say, 1837 | Alternate Cuckoo-leaf-cutter |
| Coelioxys (Synocoelioxys) apacheorum Cockerell, 1900 | |
| Coelioxys (Synocoelioxys) texana Cresson, 1872 | |
| Coelioxys (Torridapis) torrida Smith, 1854 | |
| Coelioxys (Xerocoelioxys) aperta Cresson, 1878 | |
| Coelioxys (Xerocoelioxys) edita Cresson, 1872 | |
| Coelioxys (Xerocoelioxys) grindeliae Cockerell, 1900 | |
| Coelioxys (Xerocoelioxys) piercei Crawford, 1914 | |
| Coelioxys alternatus Say, 1837 | Alternate Cuckoo-Leaf-Cutter |
| Coelioxys artemis Schwarz, 2001 | |
| Coelioxys asteris Crawford, 1914 | |
| Coelioxys atlantica (Mitchell, 1962) | ⇒ Coelioxys octodentata Say, 1824 |
| Coelioxys bisoncornua Hill, 1936 | |
| Coelioxys boharti Mitchell, 1962 | |
| Coelioxys calabarensis Pasteels, 1968 | |
| Coelioxys cockerelli Crawford, 1915 | |
| Coelioxys coloradensis Cresson, 1878 | |
| Coelioxys comstockii Cresson, 1878 | |
| Coelioxys conica Linnaeus, 1758 | |
| Coelioxys coquilletti Crawford, 1914 | |
| Coelioxys deplanata Cresson, 1878 | |
| Coelioxys digitata Friese, 1922 | |
| Coelioxys edentata Schrottky, 1909 | |
| Coelioxys erysimi Cockerell, 1912 | |
| Coelioxys floridana Cresson, 1878 | |
| Coelioxys galactiae Mitchell, 1962 | |
| Coelioxys labrosa (Friese, 1914) | ⇒ Coelioxys odin Strand, 1912 |
| Coelioxys lateralis Cresson, 1864 | |
| Coelioxys liberalis Holmberg, 1916 | |
| Coelioxys lucrosa Cresson, 1878 | |
| Coelioxys mesae Cockerell, 1921 | |
| Coelioxys mitchelli Baker, 1975 | |
| Coelioxys modestus Smith, 1854 | Modest Cuckoo Leaf-Cutter Bee |
| Coelioxys moestus Cresson, 1864 | Sad Cuckoo Leaf-Cutter Bee |
| Coelioxys nodis Baker, 1975 | |
| Coelioxys novomexicana Cockerell, 1909 | |
| Coelioxys octodentatus Say, 1824 | Eight-Toothed Cuckoo Leaf-Cutter Bee |
| Coelioxys odin Strand, 1912 | |
| Coelioxys ribis Cockerell, 1900 | |
| Coelioxys sanguinicollis Friese, 1922 | Malheur Cave amphipod |
| Coelioxys sannicolarensis Genaro, 2001 | |
| Coelioxys sculptifrons Crawford, 1914 | |
| Coelioxys serricauda Baker, 1975 | |
| Coelioxys setosa Friese, 1904 | |
| Coelioxys soledadensis Cockerell, 1909 | |
| Dianthidium (Adanthidium) arizonicum Rohwer, 1916 | |
| Dianthidium (Adanthidium) texanum Cresson, 1878 | |
| Dianthidium (Dianthidium) concinnum Cresson, 1872 | |
| Dianthidium (Dianthidium) cressonii Dalla Torre, 1896 | |
| Dianthidium (Dianthidium) curvatum Smith, 1854 | |
| Dianthidium curvatum curvatum Smith, 1854 | |
| Dianthidium curvatum sayi Cockerell, 1907 | |
| Dianthidium curvatum xerophilum (Cockerell, 1907) | ⇒ Dianthidium curvatum Smith, 1854 |
| Dianthidium (Dianthidium) heterulkei Schwarz, 1940 | |
| Dianthidium heterulkei fraternum Timberlake, 1943 | |
| Dianthidium heterulkei heterulkei Schwarz, 1940 | |
| Dianthidium (Dianthidium) parvum Cresson, 1878 | |
| Dianthidium parvum parvum Cresson, 1878 | |
| Dianthidium parvum schwarzi (Timberlake, 1943) | ⇒ Dianthidium parvum Cresson, 1878 |
| Dianthidium (Dianthidium) pudicum Cresson, 1879 | |
| Dianthidium pudicum consimile Ashmead, 1896 | |
| Dianthidium pudicum pudicum Cresson, 1879 | |
| Dianthidium (Dianthidium) simile Cresson, 1864 | Northeastern Pebble Bee |
| Dianthidium (Dianthidium) subparvum Swenk, 1914 | |
| Dianthidium (Dianthidium) ulkei Cresson, 1878 | |
| Dianthidium ulkei perterritum (Cockerell, 1913) | ⇒ Dianthidium ulkei Cresson, 1878 |
| Dianthidium ulkei ulkei Cresson, 1878 | |
| Dianthidium desertorum Timberlake, 1943 | |
| Dianthidium discors Timberlake, 1948 | |
| Dianthidium dubium Schwarz, 1928 | |
| Dianthidium dubium dilectum (Timberlake, 1948) | ⇒ Dianthidium dubium Schwarz, 1928 |
| Dianthidium dubium dubium Schwarz, 1928 | |
| Dianthidium dubium mccrackenae (Timberlake, 1943) | ⇒ Dianthidium dubium Schwarz, 1928 |
| Dianthidium floridiense Schwarz, 1926 | |
| Dianthidium implicatum Timberlake, 1948 | |
| Dianthidium marshi Grigarick & ..., 1964 | |
| Dianthidium parkeri Grigarick & ..., 1964 | |
| Dianthidium platyurum Cockerell, 1923 | |
| Dianthidium platyurum mohavense (Timberlake, 1943) | ⇒ Dianthidium platyurum Cockerell, 1923 |
| Dianthidium platyurum platyurum Cockerell, 1923 | |
| Dianthidium plenum Timberlake, 1943 | |
| Dianthidium provancheri Titus, 1906 | |
| Dianthidium singulare Cresson, 1879 | |
| Dianthidium subrufulum Timberlake, 1943 | |
| Dianthidium tertiarium ♰ T. D. A. Coc..., 1906 | |
| Dioxys atlantica (Saunders, 1904) | ⇒ Dioxys atlanticus Saunders, 1904 |
| Dioxys aurifusca (Titus, 1901) | ⇒ Dioxys aurifuscus Titus, 1901 |
| Dioxys aurifuscus Titus, 1901 | |
| Dioxys fulvohirta Ducke, 1909 | |
| Dioxys martii Cockerell, 1902 | |
| Dioxys pacifica (Cockerell, 1916) | ⇒ Dioxys pacificus Cockerell, 1916 |
| Dioxys pacifica melanogaster Hurd, 1958 | |
| Dioxys pacificus Cockerell, 1916 | |
| Dioxys pomonae Cockerell, 1910 | |
| Dioxys pomonae pomonae Cockerell, 1910 | |
| Dioxys pomonae timberlakei (Hurd, 1958) | ⇒ Dioxys pomonae Cockerell, 1910 |
| Dioxys producta (Cresson, 1879) | ⇒ Dioxys productus Cresson, 1879 |
| Dioxys producta subruber Cockerell, 1898 | |
| Dioxys productus Cresson, 1879 | |
| Eoanthidium (Eoanthidium) insulare Morawitz, 1873 | |
| Haetosmia ethiopiensis Müller & Gri..., 2017 | |
| Heriades (Heriades) truncorum Linnaeus, 1758 | Large-headed Resin Bee |
| Heriades (Michenerella) paganensis Yasumatsu, 1942 | |
| Heriades (Neotrypetes) carinatus Cresson, 1864 | |
| Heriades (Neotrypetes) crucifer (Cockerell, 1897) | ⇒ Heriades crucifera Cockerell, 1897 |
| Heriades (Neotrypetes) gracilior Cockerell, 1897 | |
| Heriades (Neotrypetes) leavitti Crawford, 1913 | Leavitt'S Armored-Resin Bee |
| Heriades (Neotrypetes) occidentalis Michener, 1938 | |
| Heriades (Neotrypetes) texanus (Michener, 1938) | ⇒ Heriades texana Michener, 1938 |
| Heriades (Neotrypetes) timberlakei Michener, 1938 | |
| Heriades (Neotrypetes) variolosus (Cresson, 1872) | ⇒ Heriades variolosa Cresson, 1872 |
| Heriades albicinctum Provancher, 1895 | |
| Heriades asteris Cockerell, 1897 | |
| Heriades bowditchi ♰ T. D. A. Coc..., 1906 | |
| Heriades carinata Cresson, 1864 | Carinate Armored-Resin Bee |
| Heriades civicus Cockerell, 1937 | |
| Heriades crawfordi Graenicher, 1928 | |
| Heriades cressoni Michener, 1938 | |
| Heriades crucifera Cockerell, 1897 | |
| Heriades denticulatum Cresson, 1878 | |
| Heriades halictinus ♰ T. D. A. Coc..., 1906 | |
| Heriades laminarum ♰ T. D. A. Coc..., 1906 | |
| Heriades mersatus ♰ T. D. A. Coc..., 1923 | |
| Heriades micheneri Timberlake, 1947 | |
| Heriades micropthalma Michener, 1954 | Long-legged cave amphipod |
| Heriades mildredae ♰ Cockerell, 1925 | |
| Heriades odontura Cockerell, 1902 | |
| Heriades priscus ♰ T. D. A. Coc..., 1917 | |
| Heriades prosopidis Cockerell, 1897 | |
| Heriades rotundiceps Cresson, 1879 | |
| Heriades saxosus ♰ Cockerell, 1913 | |
| Heriades semirubra (Cockerell, 1898) | ⇒ Hoplitis semirubra Cockerell, 1898 |
| Heriades texana Michener, 1938 | |
| Heriades variolosa Cresson, 1872 | |
| Hoplitella pentamera Cockerell, 1910 | |
| Hoplitis (Acrosmia) laevibullata Michener, 1943 | |
| Hoplitis (Alcidamea) brachyodonta Cockerell, 1933 | |
| Hoplitis (Alcidamea) claviventris Thomson, 1872 | Welted lesser mason bee |
| Hoplitis (Alcidamea) colei Crawford, 1916 | |
| Hoplitis (Alcidamea) elongaticeps Michener, 1947 | |
| Hoplitis fulgida platyura | |
| Hoplitis (Alcidamea) grinnelli Cockerell, 1910 | |
| Hoplitis (Alcidamea) leucomelana Kirby, 1802 | Black and white lesser mason bee |
| Hoplitis (Alcidamea) pilosifrons Cresson, 1864 | Hairy-Fronted Small-Mason |
| Hoplitis (Alcidamea) producta Cresson, 1864 | Produced Small-Mason |
| Hoplitis (Alcidamea) truncata Cresson, 1878 | Truncate Small-Mason |
| Hoplitis (Alcidamea) uvulalis Cockerell, 1902 | |
| Hoplitis (Cephalapis) jacintana Cockerell, 1910 | |
| Hoplitis (Cyrtosmia) hypocrita Cockerell, 1906 | |
| Hoplitis (Dasyosmia) biscutellae Cockerell, 1897 | |
| Hoplitis (Formicapis) robusta Nylander, 1848 | |
| Hoplitis (Hoplitina) bullifacies Michener, 1947 | |
| Hoplitis (Hoplitina) howardi Cockerell, 1910 | |
| Hoplitis (Hoplitis) anthocopoides Schenck, 1853 | Mason Bee |
| Hoplitis (Monumetha) albifrons Kirby, 1837 | White-Fronted Small-Mason |
| Hoplitis albifrons argentifrons Cresson, 1864 | |
| Hoplitis (Monumetha) fulgida Cresson, 1864 | |
| Hoplitis (Monumetha) louisae Cockerell, 1934 | |
| Hoplitis (Monumetha) spoliata Provancher, 1888 | Dilated-Horned Small-Mason |
| Hoplitis (Monumetha) viridimicans Cockerell, 1897 | |
| Hoplitis (Penteriades) incanescens Cockerell, 1922 | |
| Hoplitis (Penteriades) remotula Cockerell, 1910 | |
| Hoplitis (Proteriades) bidenticauda Timberlake &..., 1950 | |
| Hoplitis (Proteriades) bunocephala Michener, 1947 | |
| Hoplitis (Proteriades) caudex Timberlake &..., 1950 | |
| Hoplitis (Proteriades) deserticola Timberlake &..., 1950 | |
| Hoplitis (Proteriades) hamulicornis Timberlake &..., 1950 | |
| Hoplitis (Proteriades) nanula Timberlake &..., 1950 | |
| Hoplitis (Proteriades) palmarum Cockerell, 1935 | |
| Hoplitis (Proteriades) reducta Timberlake &..., 1950 | |
| Hoplitis (Proteriades) seminigra Timberlake &..., 1950 | |
| Hoplitis (Proteriades) semirubra Cockerell, 1898 | |
| Hoplitis (Proteriades) tristis Michener, 1936 | |
| Hoplitis (Proteriades) xerophila Cockerell, 1935 | |
| Hoplitis (Robertsonella) micheneri Mitchell, 1962 | |
| Hoplitis (Robertsonella) simplex Cresson, 1864 | |
| Hoplitis basingeri Timberlake &..., 1950 | |
| Hoplitis boharti Timberlake &..., 1950 | |
| Hoplitis brachypogon brachypogon Perez, 1879 | |
| Hoplitis campanularis ibericola Mavromoustakis, 1947 | |
| Hoplitis cryptanthae Timberlake &..., 1950 | |
| Hoplitis cylindrica Cresson, 1864 | |
| Hoplitis ebmeri (van der Zanden, 1989) | ⇒ Hoplitis ravouxi Perez, 1902 |
| Hoplitis emarginata Griswold, 1983 | |
| Hoplitis evansi Michener, 1936 | |
| Hoplitis fulva Eversmann, 1852 | |
| Hoplitis gleasoni Titus, 1904 | |
| Hoplitis graceae Cockerell, 1923 | |
| Hoplitis graeca Tkalcu, 2000 | |
| Hoplitis hurdiana Michener, 1954 | |
| Hoplitis idalia Mavromoustakis, 1948 | |
| Hoplitis karooensis Brauns, 1926 | |
| Hoplitis linsdalei Michener, 1947 | |
| Hoplitis mazourka Michener, 1954 | |
| Hoplitis mescalerium Cockerell, 1910 | |
| Hoplitis mirifica Michener, 1954 | |
| Hoplitis mojavensis Michener, 1947 | |
| Hoplitis monardae Cockerell, 1914 | |
| Hoplitis nemophilae Neff, 2009 | |
| Hoplitis nigrella Michener, 1954 | |
| Hoplitis orthognatha Griswold, 1983 | |
| Hoplitis paiute Griswold, 1983 | |
| Hoplitis paroselae Michener, 1947 | |
| Hoplitis plagiostoma Michener, 1947 | |
| Hoplitis princeps Morawitz, 1872 | |
| Hoplitis pygmaea Timberlake &..., 1950 | |
| Hoplitis ravouxi Perez, 1902 | |
| Hoplitis samarkanda Warncke, 1991 | |
| Hoplitis sambuci Titus, 1904 | |
| Hoplitis segregata Michener, 1954 | |
| Hoplitis shoshone Parker, 1976 | |
| Hoplitis similis Friese, 1909 | |
| Hoplitis torchioi Parker, 1979 | |
| Hoplitis truicauda Timberlake &..., 1950 | |
| Hoplitis ursina Friese, 1920 | |
| Hoplitis zandeni Teunissen & ..., 1992 | |
| Hoplitis zuni Parker, 1977 | |
| Hoplosmia (Odontanthocopa) bidentata Morawitz, 1876 | |
| Hoplosmia (Odontanthocopa) ligurica Morawitz, 1868 | |
| Hoplosmia dido Gribodo, 1894 | |
| Hoplostelis bivittata Cresson, 1878 | |
| Hypanthidioides panamensis Cockerell, 1913 | |
| Lithanthidium pertriste ♰ T. D. A. Coc..., 1911 | |
| Lithurgopsis apicalis Cresson, 1875 | |
| Lithurgopsis echinocacti Cockerell, 1898 | |
| Lithurgopsis littoralis Cockerell, 1917 | |
| Lithurgopsis planifrons Friese, 1908 | |
| Lithurgus (Lithurgopsis) apicalis (Cresson, 1875) | ⇒ Lithurgopsis apicalis Cresson, 1875 |
| Lithurgus (Lithurgopsis) echinocacti (Cockerell, 1898) | ⇒ Lithurgopsis echinocacti Cockerell, 1898 |
| Lithurgus (Lithurgopsis) gibbosa (Smith, 1853) | ⇒ Lithurgus gibbosus Smith, 1853 |
| Lithurgus (Lithurgopsis) littoralis (Cockerell, 1917) | ⇒ Lithurgopsis littoralis Cockerell, 1917 |
| Lithurgus (Lithurgopsis) planifrons (Friese, 1908) | ⇒ Lithurgopsis planifrons Friese, 1908 |
| Lithurgus (Lithurgus) chrysurus Fonscolombe, 1834 | Mediterranean Wood-boring Bee |
| Lithurgus (Lithurgus) cornutus Fabricius, 1787 | |
| Lithurgus (Lithurgus) scabrosus Smith, 1859 | Wood-nesting bee |
| Lithurgus gibbosus Smith, 1853 | |
| Lithurgus listrota (Snelling, 1983) | ⇒ Lithurgus listrotus Snelling, 1983 |
| Lithurgus listrotus Snelling, 1983 | |
| Megachile (Acentron) albitarsis Cresson, 1872 | White-footed Leaf-cutter Bee |
| Megachile (Amegachile) hilli Cockerell, 1929 | |
| Megachile (Argyropile) parallela Smith, 1853 | Parallel Leaf-cutter Bee |
| Megachile (Argyropile) rossi Mitchell, 1943 | |
| Megachile (Argyropile) sabinensis Mitchell, 1934 | |
| Megachile (Argyropile) townsendiana Cockerell, 1898 | |
| Megachile (Austromegachile) trigonaspis Schrottky, 1913 | |
| Megachile (Callomegachile) sculpturalis Smith, 1853 | Giant resin bee |
| Megachile (Callomegachile) umbripennis Smith, 1853 | Shadow-winged Resin Bee |
| Megachile (Chalicodoma) murina Friese, 1913 | |
| Megachile (Chalicodoma) sicula (Rossi, 1792) | ⇒ Megachile nasidens Friese, 1898 |
| Megachile (Chelostomoides) adelphodonta Cockerell, 1924 | |
| Megachile (Chelostomoides) angelarum Cockerell, 1902 | |
| Megachile (Chelostomoides) armaticeps Cresson, 1869 | |
| Megachile (Chelostomoides) axyx Snelling, 1990 | |
| Megachile (Chelostomoides) browni Mitchell, 1934 | |
| Megachile (Chelostomoides) campanulae Robertson, 1903 | Bellflower resin bee |
| Megachile (Chelostomoides) chilopsidis Cockerell, 1900 | Desert-willow Resin Bee |
| Megachile (Chelostomoides) davidsoni Cockerell, 1902 | Golden-eardrops Resin Bee |
| Megachile (Chelostomoides) discorhina Cockerell, 1924 | |
| Megachile (Chelostomoides) exilis Cresson, 1872 | Slender Resin Bee |
| Megachile exilis parexilis Mitchell, 1937 | |
| Megachile (Chelostomoides) georgica Cresson, 1878 | |
| Megachile (Chelostomoides) lobatifrons Cockerell, 1924 | |
| Megachile (Chelostomoides) manni Mitchell, 1934 | |
| Megachile (Chelostomoides) occidentalis Fox, 1894 | |
| Megachile (Chelostomoides) odontostoma Cockerell, 1924 | |
| Megachile (Chelostomoides) otomita Cresson, 1878 | |
| Megachile (Chelostomoides) prosopidis (Cockerell, 1900) | ⇒ Megachile occidentalis Fox, 1894 |
| Megachile (Chelostomoides) rugifrons Smith, 1854 | Rugose-Fronted Resin Bee |
| Megachile (Chelostomoides) spinotulata Mitchell, 1934 | |
| Megachile (Chelostomoides) subexilis Cockerell, 1908 | |
| Megachile (Chelostomoides) texensis Mitchell, 1956 | |
| Megachile (Creightonella) atrata Smith, 1853 | Stout tagelus |
| Megachile (Creightonella) frontalis Fabricius, 1804 | Hairy cockle |
| Megachile (Cressoniella) zapoteca Cresson, 1878 | |
| Megachile (Dasymegachile) chilensis (Spinola, 1851) | ⇒ Megachile saulcyi Guérin-Ménev..., 1845 |
| Megachile (Dasymegachile) saulcyi Guérin-Ménev..., 1845 | |
| Megachile (Eutricharaea) apicalis (Spinola, 1808) | ⇒ Megachile analis Nylander, 1852 |
| Megachile (Eutricharaea) chrysopyga Smith, 1853 | Stout tagelus |
| Megachile (Eutricharaea) concinna Smith, 1853 | Elegant leaf-cutter bee |
| Megachile (Eutricharaea) diligens (Smith, 1879) | ⇒ Megachile dentitarsus Sladen, 1919 |
| Megachile (Eutricharaea) fullawayi Cockerell, 1914 | Leafcutter bee |
| Megachile (Eutricharaea) gratiosa Smith, 1853 | |
| Megachile (Eutricharaea) leachella Curtis, 1828 | Megachile dorsalis |
| Megachile (Eutricharaea) obtusa Smith, 1853 | Stout tagelus |
| Megachile (Eutricharaea) pictiventris Smith, 1879 | Bunchberry dogwood |
| Megachile (Eutricharaea) rotundata Fabricius, 1787 | Alfafa leafcutting bee |
| Megachile (Eutricharaea) semiflava (Cockerell, 1937) | ⇒ Megachile cordata Smith, 1879 |
| Megachile (Eutricharaea) seychellensis Cameron, 1907 | |
| Megachile (Eutricharaea) simplex (Smith, 1853) | ⇒ Megachile inermis Provancher, 1888 |
| Megachile (Eutricharaea) timberlakei Cockerell, 1920 | Leaf-cutter bee |
| Megachile (Gronoceras) felina Gerstäcker, 1857 | |
| Megachile (Hackeriapis) apicata Smith, 1853 | Stout tagelus |
| Megachile (Hackeriapis) horatii Cockerell, 1913 | |
| Megachile (Hackeriapis) ignita Smith, 1853 | |
| Megachile (Hackeriapis) tosticauda Cockerell, 1912 | |
| Megachile (Leptorachis) petulans Cresson, 1878 | Petulant Leaf-cutter Bee |
| Megachile (Litomegachile) brevis (Say, 1837) | ⇒ Megachile pseudobrevis Mitchell, 1934 |
| Megachile brevis pseudobrevis Mitchell, 1935 | |
| Megachile (Litomegachile) coquilletti Cockerell, 1915 | |
| Megachile (Litomegachile) gentilis Cresson, 1872 | Leafcutter bee |
| Megachile (Litomegachile) lippiae Cockerell, 1900 | |
| Megachile (Litomegachile) mendica Cresson, 1878 | Flat-tailed Leaf-cutter Bee |
| Megachile (Litomegachile) onobrychidis Cockerell, 1908 | Western Little Leaf-cutter Bee |
| Megachile (Litomegachile) pankus Bzdyk, 2012 | |
| Megachile (Litomegachile) pseudobrevis Mitchell, 1934 | Southeastern Little Leaf-cutter Bee |
| Megachile (Litomegachile) snowi (Mitchell, 1927) | ⇒ Megachile mendica Cresson, 1878 |
| Megachile (Litomegachile) texana Cresson, 1878 | Texas Leaf-cutter Bee |
| Megachile (Megachile) centuncularis Linnaeus, 1758 | Common leaf-cutter bee |
| Megachile (Megachile) inermis Provancher, 1888 | Freckled milkvetch |
| Megachile (Megachile) lapponica Thomson, 1872 | Alfilaree |
| Megachile (Megachile) ligniseca Kirby, 1802 | Wood-Carving Leaf-Cutter Bee |
| Megachile (Megachile) montivaga Cresson, 1878 | Silver-tailed Petal-cutter Bee |
| Megachile (Megachile) nivalis (Friese, 1903) | ⇒ Megachile lapponica Thomson, 1872 |
| Megachile (Megachile) relativa Cresson, 1878 | Golden-Tailed Leafcutter |
| Megachile (Megachiloides) alamosana (Mitchell, 1934) | ⇒ Megachile anograe Cockerell, 1908 |
| Megachile (Megachiloides) alata Mitchell, 1934 | |
| Megachile (Megachiloides) amica Cresson, 1872 | |
| Megachile (Megachiloides) anograe Cockerell, 1908 | |
| Megachile (Megachiloides) brimleyi Mitchell, 1926 | |
| Megachile (Megachiloides) casadae Cockerell, 1898 | |
| Megachile (Megachiloides) coloradensis (Mitchell, 1936) | ⇒ Megachile zapoteca Cresson, 1878 |
| Megachile (Megachiloides) dakotensis Mitchell, 1926 | |
| Megachile (Megachiloides) deflexa Cresson, 1878 | |
| Megachile (Megachiloides) fucata Mitchell, 1934 | |
| Megachile (Megachiloides) gravita Mitchell, 1934 | |
| Megachile (Megachiloides) hookeri Cockerell, 1915 | |
| Megachile (Megachiloides) integra Cresson, 1878 | |
| Megachile (Megachiloides) integrella Mitchell, 1926 | |
| Megachile (Megachiloides) legalis Cresson, 1879 | |
| Megachile (Megachiloides) manifesta Cresson, 1878 | |
| Megachile (Megachiloides) mucorosa Cockerell, 1908 | |
| Megachile (Megachiloides) nevadensis Cresson, 1879 | |
| Megachile (Megachiloides) oenotherae Mitchell, 1924 | |
| Megachile (Megachiloides) pascoensis Mitchell, 1934 | |
| Megachile (Megachiloides) rubi Mitchell, 1924 | |
| Megachile (Megachiloides) soledadensis Cockerell, 1900 | |
| Megachile (Megachiloides) subnigra Cresson, 1879 | |
| Megachile (Megachiloides) wheeleri Mitchell, 1927 | |
| Megachile (Megachiloides) wyomingensis Mitchell, 1934 | |
| Megachile (Megachiloides) xerophila Cockerell, 1933 | |
| Megachile (Melanosarus) bahamensis Mitchell, 1927 | Bahama Leaf-cutter Bee |
| Megachile (Melanosarus) xylocopoides Smith, 1853 | Carpenter-mimic Leaf-cutter Bee |
| Megachile (Neochelynia) chichimeca Cresson, 1878 | |
| Megachile (Neochelynia) stomatura Cockerell, 1917 | |
| Megachile (Neocressoniella) carbonaria (Smith, 1853) | ⇒ Megachile gemula Cresson, 1878 |
| Megachile (Neoeutrichaea) rotundata Fabricius, 1793 | Alfalfa leaf-cutter bee |
| Megachile (Paracella) coelostoma (Cockerell, 1932) | ⇒ Megachile barbata Smith, 1853 |
| Megachile (Pseudocentron) azteca Cresson, 1878 | |
| Megachile (Pseudocentron) poeyi Guérin-Ménev..., 1845 | |
| Megachile (Pseudocentron) pollinosa Spinola, 1851 | |
| Megachile (Pseudocentron) pruina Smith, 1853 | Hoary Leaf-cutter Bee |
| Megachile (Pseudocentron) sidalceae Cockerell, 1897 | |
| Megachile (Pseudocentron) terrestris (Schrottky, 1902) | ⇒ Megachile mellitarsis Cresson, 1878 |
| Megachile (Pseudomegachile) ericetorum Lepeletier, 1841 | Banded Mud Bee |
| Megachile (Pseudomegachile) lanata Fabricius, 1775 | Wooly Wall Bee |
| Megachile (Pseudomegachile) nigripes Spinola, 1838 | Megachilid bee |
| Megachile (Sayapis) fidelis Cresson, 1878 | Faithful leafcutting bee |
| Megachile (Sayapis) frugalis Cresson, 1872 | |
| Megachile (Sayapis) inimica Cresson, 1872 | Hostile Leaf-cutter Bee |
| Megachile inimica sayi Cresson, 1878 | |
| Megachile (Sayapis) newberryae Cockerell, 1900 | Newberry´s leaf-cutter Bee |
| Megachile (Sayapis) policaris Say, 1831 | |
| Megachile (Sayapis) pugnata Say, 1837 | Pugnacious Leaf-cutter Bee |
| Megachile (Schizomegachile) monstrosa Smith, 1868 | |
| Megachile (Xanthosarus) addenda Cresson, 1878 | Cranberry Leafcutter |
| Megachile (Xanthosarus) agustini Cockerell, 1905 | |
| Megachile (Xanthosarus) analis Nylander, 1852 | |
| Megachile (Xanthosarus) circumcincta Kirby, 1802 | Black-headed leaf-cutter bee |
| Megachile (Xanthosarus) cochisiana Mitchell, 1934 | |
| Megachile (Xanthosarus) comata Cresson, 1872 | |
| Megachile (Xanthosarus) dentitarsus Sladen, 1919 | |
| Megachile (Xanthosarus) fortis Cresson, 1872 | |
| Megachile (Xanthosarus) frigida Smith, 1853 | Frigid Leaf-cutter Bee |
| Megachile (Xanthosarus) gemula Cresson, 1878 | Small-handed Leaf-cutter Bee |
| Megachile (Xanthosarus) giliae (Cockerell, 1906) | ⇒ Megachile circumcincta Kirby, 1802 |
| Megachile (Xanthosarus) ingenua Cresson, 1878 | |
| Megachile (Xanthosarus) innupta Cockerell, 1915 | |
| Megachile (Xanthosarus) latimanus Say, 1823 | Broad-handed Leaf-cutter Bee |
| Megachile (Xanthosarus) melanophaea Smith, 1853 | Black-and-gray Leaf-cutter Bee |
| Megachile (Xanthosarus) mucida Cresson, 1878 | |
| Megachile (Xanthosarus) perihirta Cockerell, 1898 | Furry Leaf-cutter Bee |
| Megachile (Xanthosarus) willughbiella (Kirby, 1802) | ⇒ Megachile willughbiella Kirby, 1802 |
| Megachile abducta Mitchell, 1926 | |
| Megachile albula Lovell & Coc..., 1907 | |
| Megachile angelica Mitchell, 1933 | |
| Megachile angonica Cockerell, 1937 | |
| Megachile angularis Mitchell, 1930 | |
| Megachile angusta Mitchell, 1930 | |
| Megachile aspera Mitchell, 1924 | |
| Megachile astata Mitchell, 1933 | |
| Megachile astragali Mitchell, 1938 | |
| Megachile avara Cresson, 1878 | |
| Megachile bakeri (Cockerell, 1918) | ⇒ Megachile pascoensis Mitchell, 1934 |
| Megachile binominata Smith, 1853 | Stout tagelus |
| Megachile binotulata Dalla Torre, 1896 | |
| Megachile bishoppi Cockerell, 1915 | |
| Megachile boharti Mitchell, 1942 | |
| Megachile bradleyi Mitchell, 1934 | |
| Megachile bruneri Mitchell, 1934 | |
| Megachile bucephala (Fabricius, 1793) | ⇒ Megachile pugnatus Say, 1837 |
| Megachile calogaster Cockerell, 1898 | |
| Megachile chelostomoides Gribodo, 1894 | |
| Megachile chlorura Cockerell, 1918 | Leafcutter bee |
| Megachile chomskyi Sheffield, 2013 | |
| Megachile chrysothamni Cockerell, 1908 | |
| Megachile clara Mitchell, 1930 | |
| Megachile cleomis (Cockerell, 1900) | ⇒ Megachile texana Cresson, 1878 |
| Megachile cordata Smith, 1879 | Bunchberry dogwood |
| Megachile coreopsana Mitchell, 1933 | |
| Megachile cylindrica Friese, 1906 | |
| Megachile decipiens Lovell & Coc..., 1907 | |
| Megachile denticulata (Reiche & Fai..., 1847) | ⇒ Megachile lanata Fabricius, 1775 |
| Megachile dentipes (Vachal, 1909) | ⇒ Megachile cylindrica Friese, 1906 |
| Megachile disparilis Cresson, 1872 | |
| Megachile disparipennis W.P.Cockerell, 1917 | |
| Megachile dorsata Smith, 1853 | Stout tagelus |
| Megachile dulciana Mitchell, 1934 | |
| Megachile duplexa Mitchell, 1933 | |
| Megachile emoryi Cockerell, 1904 | |
| Megachile empeyi Pasteels, 1970 | |
| Megachile exclamans Viereck, 1916 | |
| Megachile facunda Cresson, 1872 | |
| Megachile fastidiosa Mitchell, 1930 | |
| Megachile florensis Mitchell, 1943 | |
| Megachile fuerteventurae Tkalcu, 1993 | |
| Megachile fulvohirta Friese, 1904 | |
| Megachile gabrielensis Mitchell, 1933 | |
| Megachile geneana Gribodo, 1894 | |
| Megachile generosa Cresson, 1878 | |
| Megachile grandis Cresson, 1872 | |
| Megachile hilata Mitchell, 1934 | |
| Megachile howardi Cockerell, 1919 | |
| Megachile impartita Mitchell, 1934 | |
| Megachile indianorum Cockerell, 1913 | |
| Megachile infragilis Cresson, 1878 | |
| Megachile ingens Friese, 1903 | |
| Megachile instita Mitchell, 1934 | |
| Megachile inyoensis Mitchell, 1942 | |
| Megachile kallstroemiae Cockerell, 1908 | |
| Megachile konowi | |
| Megachile laticeps Smith, 1853 | Stout tagelus |
| Megachile laurita Mitchell, 1927 | |
| Megachile lucrosa Cresson, 1872 | |
| Megachile macleayi Cockerell, 1907 | |
| Megachile macneilli Mitchell, 1957 | |
| Megachile manumuskin Viereck, 1902 | |
| Megachile maurata Mitchell, 1936 | |
| Megachile megagyna Cockerell, 1909 | |
| Megachile melanderi Mitchell, 1944 | |
| Megachile melanogaster Eversmann, 1852 | |
| Megachile mellitarsis Cresson, 1878 | |
| Megachile meriani (Strand, 1911) | ⇒ Megachile seychellensis Cameron, 1907 |
| Megachile micheneri Mitchell, 1936 | |
| Megachile mojavensis Mitchell, 1934 | |
| Megachile montonii Gribodo, 1894 | |
| Megachile morio (Smith, 1853) | ⇒ Megachile pruina Smith, 1853 |
| Megachile moschata Mitchell, 1933 | |
| Megachile murinella Cockerell, 1908 | |
| Megachile neglecta Mitchell, 1924 | |
| Megachile nelsoni Mitchell, 1936 | |
| Megachile newelli Cockerell, 1908 | |
| Megachile nupta Cresson, 1872 | |
| Megachile optiva Cresson, 1872 | |
| Megachile oslari Mitchell, 1934 | |
| Megachile osmioides Cresson, 1872 | |
| Megachile pacifica (Panzer, 1798) | ⇒ Megachile rotundata Fabricius, 1787 |
| Megachile pallorea Vachal, 1903 | |
| Megachile palmensis Mitchell, 1934 | |
| Megachile pararhodura Cockerell, 1910 | |
| Megachile pararubi Mitchell, 1957 | |
| Megachile paratexana Mitchell, 1930 | |
| Megachile parksi Mitchell, 1936 | |
| Megachile penicillata Cockerell, 1915 | |
| Megachile perbrevis Cresson, 1878 | |
| Megachile perniciosa (Friese, 1903) | ⇒ Megachile rufiventris Guérin-Ménev..., 1834 |
| Megachile perplexa Smith, 1853 | |
| Megachile pinguis Cresson, 1878 | |
| Megachile praedicta ♰ T. D. A. Coc..., 1908 | |
| Megachile praefica (Gribodo, 1894) | ⇒ Megachile saulcyi Guérin-Ménev..., 1845 |
| Megachile pratti Cockerell, 1913 | |
| Megachile pruinosa (Friese, 1903) | ⇒ Megachile texana Cresson, 1878 |
| Megachile pseudolegalis Mitchell, 1957 | |
| Megachile pseudonigra Mitchell, 1927 | |
| Megachile pusilla Perez, 1884 | |
| Megachile redlandica Mitchell, 1933 | |
| Megachile relicta Cockerell, 1913 | |
| Megachile rhyssalus Wu, 2005 | |
| Megachile sapellonis Cockerell, 1900 | |
| Megachile sayi Cresson, 1878 | |
| Megachile schismatura Cockerell, 1908 | |
| Megachile scotti (Cockerell, 1937) | ⇒ Megachile wahlbergi Friese, 1901 |
| Megachile secunda (Dalla Torre, 1896) | ⇒ Megachile pictiventris Smith, 1879 |
| Megachile semilaurita Mitchell, 1927 | |
| Megachile seraxensis Radoszkowski, 1893 | |
| Megachile shermani Mitchell, 1924 | |
| Megachile smithi Mitchell, 1933 | |
| Megachile stoddardensis Mitchell, 1957 | |
| Megachile studiosa (Bingham, 1899) | ⇒ Megachile exilis Cresson, 1872 |
| Megachile subanograe Mitchell, 1934 | |
| Megachile sublaurita Mitchell, 1927 | |
| Megachile tepaneca Cresson, 1878 | |
| Megachile tephrosiana Mitchell, 1927 | |
| Megachile toluca Cresson, 1878 | |
| Megachile toscata Mitchell, 1934 | |
| Megachile tucsonensis Mitchell, 1956 | |
| Megachile umatillensis Mitchell, 1927 | |
| Megachile victoriana Mitchell, 1934 | |
| Megachile virginiana Mitchell, 1926 | |
| Megachile wahlbergi Friese, 1901 | |
| Megachile yumensis Mitchell, 1944 | |
| Megachile zaptlana Cresson, 1878 | |
| Megachiloides oenotherae Mitchell, 1924 | |
| Monumetha argentifrons Cresson, 1864 | |
| Monumetha borealis Cresson, 1864 | |
| Notanthidium (Notanthidium) steloides Spinola, 1851 | |
| Oligotropus wilmingtoni Mitchell, 1924 | |
| Osmia (Acanthosmioides) calcarata White, 1952 | Lily of the valley vine |
| Osmia (Acanthosmioides) dakotensis Michener, 1937 | |
| Osmia (Acanthosmioides) francisconis (White, 1952) | ⇒ Osmia enixa Sandhouse, 1924 |
| Osmia (Acanthosmioides) giffardi Sandhouse, 1939 | |
| Osmia (Acanthosmioides) giliarum Cockerell, 1906 | |
| Osmia (Acanthosmioides) hurdi (White, 1952) | ⇒ Osmia austromaritima Michener, 1936 |
| Osmia (Acanthosmioides) integra Cresson, 1878 | |
| Osmia (Acanthosmioides) kenoyeri (Cockerell, 1915) | ⇒ Osmia tarsata Provancher, 1888 |
| Osmia (Acanthosmioides) lanei Sandhouse, 1939 | |
| Osmia (Acanthosmioides) longula Cresson, 1864 | |
| Osmia (Acanthosmioides) nifoata Cockerell, 1909 | |
| Osmia (Acanthosmioides) nigrifrons Cresson, 1878 | |
| Osmia (Acanthosmioides) nigrobarbata Cockerell, 1916 | |
| Osmia (Acanthosmioides) obliqua White, 1952 | Lily of the valley vine |
| Osmia (Acanthosmioides) odontogaster Cockerell, 1897 | |
| Osmia (Acanthosmioides) palmula Rightmyer & ..., 2010 | |
| Osmia (Acanthosmioides) physariae (Cockerell, 1907) | ⇒ Osmia giliarum Cockerell, 1906 |
| Osmia (Acanthosmioides) prunorum Cockerell, 1897 | |
| Osmia (Acanthosmioides) sedula Sandhouse, 1924 | |
| Osmia (Acanthosmioides) sladeni (Sandhouse, 1925) | ⇒ Osmia nifoata Cockerell, 1909 |
| Osmia (Acanthosmioides) trifoliama Sandhouse, 1939 | |
| Osmia (Acanthosmioides) unca Michener, 1937 | |
| Osmia (Acanthosmioides) watsoni Cockerell, 1911 | |
| Osmia (Cephalosmia) californica Cresson, 1864 | |
| Osmia (Cephalosmia) grinnelli Cockerell, 1910 | |
| Osmia (Cephalosmia) marginipennis Cresson, 1878 | |
| Osmia (Cephalosmia) montana Cresson, 1864 | |
| Osmia (Cephalosmia) subaustralis Cockerell, 1900 | |
| Osmia (Chalcosmia) caerulescens Linnaeus, 1758 | |
| Osmia caerulescens caerulescens Linnaeus, 1758 | |
| Osmia (Chenosmia) cobaltina Cresson, 1878 | |
| Osmia (Diceratosmia) botitena Cockerell, 1909 | |
| Osmia (Diceratosmia) conjuncta Cresson, 1864 | |
| Osmia (Diceratosmia) subfasciata Cresson, 1872 | |
| Osmia (Euthosmia) glauca Fowler, 1899 | |
| Osmia (Helicosmia) caerulescens (Linnaeus, 1758) | ⇒ Osmia caerulescens Linnaeus, 1758 |
| Osmia (Helicosmia) chalybea Smith, 1853 | Stout tagelus |
| Osmia (Helicosmia) coerulescens Linnaeus, 1758 | |
| Osmia (Helicosmia) coloradensis Cresson, 1878 | Colorado Osmia |
| Osmia (Helicosmia) georgica Cresson, 1878 | Georgia Mason |
| Osmia (Helicosmia) latreillei Spinola, 1806 | |
| Osmia (Helicosmia) signata Erichson, 1835 | |
| Osmia (Helicosmia) sogdiana (Morawitz, 1875) | ⇒ Osmia dives Mocsáry, 1877 |
| Osmia (Melanosmia) aglaia (Sandhouse, 1939) | ⇒ Osmia laeta Sandhouse, 1924 |
| Osmia (Melanosmia) albiventris Cresson, 1864 | |
| Osmia (Melanosmia) albolateralis Cockerell, 1906 | |
| Osmia (Melanosmia) alpestris Rust & Bohart, 1986 | |
| Osmia (Melanosmia) aquilonaria Rightmyer, G..., 2010 | |
| Osmia (Melanosmia) atriventris Cresson, 1864 | Maine blueberry bee |
| Osmia (Melanosmia) atrocyanea Cockerell, 1897 | |
| Osmia (Melanosmia) bakeri (Sandhouse, 1924) | ⇒ Osmia melanopleura Cockerell, 1916 |
| Osmia (Melanosmia) brevis Cresson, 1864 | |
| Osmia (Melanosmia) bruneri Cockerell, 1897 | |
| Osmia (Melanosmia) bucephala Cresson, 1864 | Bufflehead Mason Bee |
| Osmia (Melanosmia) calaminthae Rightmyer, D..., 2011 | Blue Calamintha bee |
| Osmia (Melanosmia) calla Cockerell, 1897 | |
| Osmia (Melanosmia) cara Cockerell, 1910 | |
| Osmia (Melanosmia) caulicola Cockerell, 1934 | |
| Osmia (Melanosmia) cerasi Cockerell, 1897 | |
| Osmia (Melanosmia) clarescens Cockerell, 1911 | |
| Osmia (Melanosmia) cockerelli (Sandhouse, 1939) | ⇒ Osmia dakotensis Michener, 1937 |
| Osmia (Melanosmia) collinsiae Robertson, 1905 | Collinsia Mason |
| Osmia (Melanosmia) cordata Robertson, 1902 | |
| Osmia (Melanosmia) crassa Rust & Bohart, 1986 | |
| Osmia (Melanosmia) cyanella Cockerell, 1897 | |
| Osmia (Melanosmia) cyaneonitens Cockerell, 1906 | |
| Osmia (Melanosmia) densa Cresson, 1864 | |
| Osmia (Melanosmia) distincta Cresson, 1864 | Distinct Mason Bee |
| Osmia (Melanosmia) enixa Sandhouse, 1924 | |
| Osmia (Melanosmia) exigua Cresson, 1878 | |
| Osmia (Melanosmia) felti Cockerell, 1911 | |
| Osmia (Melanosmia) gabrielis Cockerell, 1910 | |
| Osmia (Melanosmia) gaudiosa Cockerell, 1907 | |
| Osmia (Melanosmia) grindeliae Cockerell, 1910 | |
| Osmia (Melanosmia) hemera Sandhouse, 1939 | |
| Osmia (Melanosmia) hendersoni Cockerell, 1907 | |
| Osmia (Melanosmia) hesperos Sandhouse, 1939 | |
| Osmia (Melanosmia) indeprensa Sandhouse, 1939 | |
| Osmia (Melanosmia) inermis Zetterstedt, 1838 | Mountain mason bee |
| Osmia (Melanosmia) inspergens Lovell & Coc..., 1907 | Shiny-Faced Mason Bee |
| Osmia (Melanosmia) inurbana Cresson, 1878 | |
| Osmia (Melanosmia) iridis Cockerell & ..., 1902 | |
| Osmia (Melanosmia) juxta Cresson, 1864 | |
| Osmia (Melanosmia) kincaidii Cockerell, 1897 | |
| Osmia (Melanosmia) lacus Sandhouse, 1939 | |
| Osmia (Melanosmia) laeta Sandhouse, 1924 | |
| Osmia (Melanosmia) liogastra Cockerell, 1933 | |
| Osmia (Melanosmia) malina Cockerell, 1909 | |
| Osmia (Melanosmia) marginata Michener, 1936 | |
| Osmia (Melanosmia) maritima Friese, 1885 | |
| Osmia (Melanosmia) melanopleura Cockerell, 1916 | |
| Osmia (Melanosmia) mertensiae Cockerell, 1907 | |
| Osmia (Melanosmia) nanula Cockerell, 1897 | |
| Osmia (Melanosmia) nearctica Rightmyer, G..., 2010 | |
| Osmia (Melanosmia) neocyanopoda Rust & Bohart, 1986 | |
| Osmia (Melanosmia) nigriventris Zetterstedt, 1838 | |
| Osmia (Melanosmia) pagosa Sandhouse, 1939 | |
| Osmia (Melanosmia) paradisica Sandhouse, 1924 | |
| Osmia (Melanosmia) parietina (Curtis, 1828) | ⇒ Osmia inermis Zetterstedt, 1838 |
| Osmia (Melanosmia) pikei Cockerell, 1907 | |
| Osmia (Melanosmia) proxima Cresson, 1864 | |
| Osmia (Melanosmia) pulsatillae Cockerell, 1907 | |
| Osmia (Melanosmia) pumila Cresson, 1864 | Dwarf Mason Bee |
| Osmia (Melanosmia) raritatis Michener, 1957 | |
| Osmia (Melanosmia) rawlinsi Sandhouse, 1939 | |
| Osmia (Melanosmia) regulina Cockerell, 1911 | |
| Osmia (Melanosmia) rostrata Sandhouse, 1924 | |
| Osmia (Melanosmia) sanctaerosae Cockerell, 1910 | |
| Osmia (Melanosmia) sandhouseae Mitchell, 1927 | |
| Osmia (Melanosmia) sculleni Sandhouse, 1939 | |
| Osmia (Melanosmia) simillima Smith, 1853 | Similar Mason Bee |
| Osmia (Melanosmia) tersula Cockerell, 1912 | Wide-Banded Mason Bee |
| Osmia (Melanosmia) texana Cresson, 1872 | Texas Mason Bee |
| Osmia (Melanosmia) titusi (Cockerell, 1905) | ⇒ Osmia phenax Cockerell, 1897 |
| Osmia (Melanosmia) tristella Cockerell, 1897 | |
| Osmia (Melanosmia) uncinata (Gerstäcker, 1869) | ⇒ Osmia unca Michener, 1937 |
| Osmia (Melanosmia) virga Sandhouse, 1939 | Twig Mason Bee |
| Osmia (Melanosmia) zephyros Sandhouse, 1939 | |
| Osmia (Monilosmia) bridwelli (Sandhouse, 1939) | ⇒ Osmia cara Cockerell, 1910 |
| Osmia (Mystacosmia) nemoris Sandhouse, 1924 | |
| Osmia (Neosmia) cinnabarina Perez, 1895 | Chrysanthemum gall midge |
| Osmia (Nothosmia) atriventris (Cresson, 1864) | ⇒ Osmia atriventris Cresson, 1864 |
| Osmia (Nothosmia) latisulcata Michener, 1936 | |
| Osmia (Osmia) cornifrons Radoszkowski, 1887 | Horn-faced bee |
| Osmia (Osmia) cornuta Latreille, 1805 | Mason bee |
| Osmia (Osmia) lignaria Say, 1837 | Blue orchard bee |
| Osmia (Osmia) propinqua (Cresson, 1864) | ⇒ Osmia lignaria Say, 1837 |
| Osmia (Osmia) ribifloris Cockerell, 1900 | Blueberry bee |
| Osmia (Osmia) taurus Smith, 1873 | Alternate-leaf dogwood |
| Osmia (Pyrosmia) pusilla Cresson, 1864 | |
| Osmia (Pyrosmia) submicans Morawitz, 1870 | |
| Osmia 4-dentata | |
| Osmia abnormis Cresson, 1878 | |
| Osmia albatera Warncke, 1991 | |
| Osmia albohirta Mitchell, 1924 | |
| Osmia amala Cockerell, 1907 | |
| Osmia armaticeps Cresson, 1878 | |
| Osmia ashmeadii Titus, 1904 | Long-horn caddisflies |
| Osmia austromaritima Michener, 1936 | |
| Osmia autromaritima | |
| Osmia basilissa Cockerell, 1911 | |
| Osmia bella (Cresson, 1878) | ⇒ Osmia cobaltina Cresson, 1878 |
| Osmia besseyae Cockerell, 1910 | |
| Osmia bidentata (Morawitz, 1876) | ⇒ Hoplosmia bidentata Morawitz, 1876 |
| Osmia breviata Warncke, 1988 | |
| Osmia brevihirta Cockerell, 1907 | |
| Osmia cahuilla Cooper, 1993 | |
| Osmia casta Cockerell, 1910 | |
| Osmia chlorops Cockerell & ..., 1902 | |
| Osmia claremontensis (Michener, 1936) | ⇒ Osmia sedula Sandhouse, 1924 |
| Osmia cognata Pérez, 1895 | |
| Osmia conjunctoides (Robertson, 1893) | ⇒ Osmia subfasciata Cresson, 1872 |
| Osmia corkinsi Sandhouse, 1924 | |
| Osmia cyanopoda Cockerell, 1916 | |
| Osmia cyanosoma Cockerell, 1916 | |
| Osmia davidsoniella Cockerell, 1905 | |
| Osmia depressa Michener, 1937 | |
| Osmia derasa Perez, 1895 | Chrysanthemum gall midge |
| Osmia detrita (Perez, 1879) | ⇒ Hoplosmia ligurica Morawitz, 1868 |
| Osmia dido (Gribodo, 1894) | ⇒ Hoplosmia dido Gribodo, 1894 |
| Osmia dives Mocsáry, 1877 | |
| Osmia dolerosa Sandhouse, 1939 | |
| Osmia dubia Cresson, 1864 | |
| Osmia ednae (Cockerell, 1907) | ⇒ Osmia calla Cockerell, 1897 |
| Osmia faceta Cresson, 1878 | |
| Osmia fervida (Smith, 1853) | ⇒ Megachile perplexa Smith, 1853 |
| Osmia florissanticola Cockerell, 1906 | |
| Osmia foxi Cameron, 1901 | |
| Osmia gaillardiae Cockerell, 1906 | |
| Osmia gonzalezi Griswold & R..., 2017 | |
| Osmia grandior Cockerell, 1897 | |
| Osmia grandis (Morawitz, 1873) | ⇒ Hoplitis fulva Eversmann, 1852 |
| Osmia granulosa (Cockerell, 1911) | ⇒ Osmia exigua Cresson, 1878 |
| Osmia hesperella Cockerell, 1906 | |
| Osmia holochlora Cockerell, 1923 | |
| Osmia hypoleuca Cockerell, 1907 | |
| Osmia illinoensis Robertson, 1897 | |
| Osmia jucunda (Smith, 1853) | ⇒ Osmia signata Erichson, 1835 |
| Osmia karooensis (Brauns, 1926) | ⇒ Hoplitis karooensis Brauns, 1926 |
| Osmia lacunosa Griswold & R..., 2017 | |
| Osmia laticella van der Zanden, 1986 | |
| Osmia laticeps Thomson, 1872 | Alfilaree |
| Osmia latitarsis Cresson, 1864 | |
| Osmia leonis Cockerell, 1907 | |
| Osmia louisianae Cockerell, 1901 | |
| Osmia lupinicola Cockerell, 1937 | |
| Osmia mandibularis Cresson, 1878 | |
| Osmia marilaunidii Cockerell, 1914 | |
| Osmia maura Cresson, 1878 | |
| Osmia megacephala Cresson, 1864 | |
| Osmia melanocephala Morawitz, 1875 | |
| Osmia mendocinensis Sandhouse, 1939 | |
| Osmia metitia Cockerell, 1909 | |
| Osmia michiganensis Mitchell, 1962 | |
| Osmia mixta Michener, 1936 | |
| Osmia morongana Cockerell, 1937 | |
| Osmia nana Morawitz, 1873 | |
| Osmia nassa Cockerell, 1910 | |
| Osmia nigricollis Warncke, 1992 | |
| Osmia novomexicana Cockerell, 1903 | |
| Osmia parvula (Dufour & Perris, 1840) | ⇒ Hoplitis leucomelana Kirby, 1802 |
| Osmia pasadenae Cockerell, 1910 | |
| Osmia pascoensis Cockerell, 1897 | |
| Osmia pentstemonis Cockerell, 1906 | |
| Osmia permorata Cockerell, 1910 | |
| Osmia phaceliae Cockerell, 1907 | |
| Osmia phenax Cockerell, 1897 | |
| Osmia pingreeana Michener, 1937 | |
| Osmia plathycera Gerstäcker, 1869 | |
| Osmia platyura Cockerell, 1911 | |
| Osmia pogonigera Cockerell, 1910 | |
| Osmia potentillae Michener, 1936 | |
| Osmia purpurata Ducke, 1899 | |
| Osmia purpurea Cresson, 1864 | |
| Osmia putata Cockerell, 1910 | |
| Osmia quadriceps Cresson, 1878 | |
| Osmia ramaleyi Cockerell, 1907 | |
| Osmia remotula Cockerell, 1910 | |
| Osmia rufina Cockerell, 1931 | |
| Osmia rustica Cresson, 1864 | |
| Osmia sanrafaelae Parker, 1985 | |
| Osmia seneciophila Cockerell, 1907 | |
| Osmia sequoiae Michener, 1936 | |
| Osmia sericea Cresson, 1864 | |
| Osmia subarctica Cockerell, T., 1912 | |
| Osmia subcornuta Morawitz, 1875 | |
| Osmia subornata Cockerell, 1897 | |
| Osmia subpurpurea Cockerell, 1897 | |
| Osmia tanneri Sandhouse, 1939 | |
| Osmia tarsata Provancher, 1888 | Freckled milkvetch |
| Osmia thysanisca Michener, 1957 | |
| Osmia trevoris Cockerell, 1897 | |
| Osmia universitatis (Cockerell, 1907) | ⇒ Osmia pikei Cockerell, 1907 |
| Osmia vallicola Cockerell, 1907 | |
| Osmia vandykei Sandhouse, 1924 | |
| Osmia vicina Cresson, 1864 | |
| Osmia viridior Cockerell, 1907 | |
| Osmia viridis Cresson, 1864 | |
| Osmia wardiana Cockerell, 1907 | |
| Paranthidium (Paranthidium) jugatorium Say, 1824 | Sunflower Burrowing-Resin Bee |
| Paranthidium jugatorium butleri (Snelling, 1962) | ⇒ Paranthidium jugatorium Say, 1824 |
| Paranthidium jugatorium jugatorium Say, 1824 | |
| Paranthidium jugatorium lepidum Cresson, 1878 | |
| Paranthidium jugatorium perpictum Cockerell, 1898 | |
| Paranthidium gabbii Cresson, 1878 | |
| Proteriades shoshone (Parker, 1976) | ⇒ Hoplitis shoshone Parker, 1976 |
| Proteriades torchioi (Parker, 1979) | ⇒ Hoplitis torchioi Parker, 1979 |
| Proteriades zuni (Parker, 1977) | ⇒ Hoplitis zuni Parker, 1977 |
| Protosmia (Chelostomopsis) rubifloris Cockerell, 1898 | |
| Protosmia (Protosmia) glutinosa Giraud, 1871 | |
| Pseudoanthidium tuberculiferum Brauns, 1905 | |
| Pseudocentron crotalariae Schwimmer, 1980 | |
| Pseudoheriades (Afroheriades) primus (Peters, 1970) | ⇒ Afroheriades prima Peters, 1970 |
| Robertsonella gleasoni Titus, 1904 | |
| Serapista denticulata Smith, 1854 | |
| Stelis (Dolichostelis) costalis Cresson, 1872 | |
| Stelis (Dolichostelis) costaricensis Friese, 1921 | Pickle Springs amphipod |
| Stelis (Dolichostelis) laticincta Cresson, 1878 | |
| Stelis (Dolichostelis) louisae Cockerell, 1911 | |
| Stelis (Dolichostelis) perpulchra Crawford, 1916 | |
| Stelis (Dolichostelis) rudbeckiarum Cockerell, 1904 | |
| Stelis (Heterostelis) australis Cresson, 1878 | |
| Stelis australis floridensis Mitchell, 1962 | |
| Stelis (Microstelis) sexmaculata Ashmead, 1896 | |
| Stelis (Stelidium) ashmeadiella | |
| Stelis (Stelis) anthracina Timberlake, 1941 | |
| Stelis (Stelis) callura Cockerell, 1925 | |
| Stelis (Stelis) carnifex Cockerell, 1911 | |
| Stelis (Stelis) coarctatus Crawford, 1916 | Constrained Cuckoo Carder Bee |
| Stelis (Stelis) diversicolor Crawford, 1916 | |
| Stelis (Stelis) interrupta Cresson, 1897 | |
| Stelis (Stelis) labiata Provancher, 1888 | Kissing Cuckoo Carder Bee |
| Stelis (Stelis) lateralis Cresson, 1864 | Spot-Sided Dark Bee |
| Stelis (Stelis) montana Cresson, 1864 | |
| Stelis (Stelis) monticola Cresson, 1878 | |
| Stelis (Stelis) permaculata Cockerell, 1898 | Sixteen-Spotted Cuckoo Carder Bee |
| Stelis (Stelis) subcaerulea Cresson, 1878 | |
| Stelis (Stelis) subemarginata Cresson, 1878 | |
| Stelis 6-maculata | |
| Stelis acutiventris Linsley, 1939 | |
| Stelis alta Parker & Gri..., 2013 | |
| Stelis anthidioides Timberlake, 1941 | |
| Stelis anthocopae Parker & Gri..., 2013 | |
| Stelis ashmeadiellae Timberlake, 1941 | |
| Stelis ater Mitchell, 1962 | |
| Stelis broemelingi Parker & Gri..., 2013 | |
| Stelis calliphorina Cockerell, 1911 | |
| Stelis chlorocyania | |
| Stelis chlorocyonia | |
| Stelis cockerelli Hicks, 1933 | |
| Stelis depressa Timberlake, 1941 | |
| Stelis elegans Cresson, 1864 | |
| Stelis elongativentris Parker, 1987 | |
| Stelis floridana Graenicher, 1928 | |
| Stelis foederalis Smith, 1854 | Federal Cuckoo Carder Bee |
| Stelis franciscana Cockerell, 1925 | |
| Stelis hemirhoda Linsley, 1939 | |
| Stelis holocyanea Cockerell, 1925 | |
| Stelis hurdi Thorp, 1966 | |
| Stelis imperialis Parker & Gri..., 2013 | |
| Stelis joanae Parker & Gri..., 2013 | |
| Stelis lamelliterga Parker & Gri..., 2013 | |
| Stelis linsleyi Timberlake, 1941 | |
| Stelis maculata Provancher, 1888 | |
| Stelis manni Crawford, 1917 | |
| Stelis melanotricha Cockerell, 1925 | |
| Stelis micheneri Linsley, 1939 | |
| Stelis michiganensis Mitchell, 1962 | |
| Stelis nigriventris Timberlake, 1941 | |
| Stelis nitida Cresson, 1878 | |
| Stelis occidentalis Parker & Gri..., 2013 | |
| Stelis oreophila Popov, 1935 | |
| Stelis paiute Parker & Gri..., 2013 | |
| Stelis palmarum Timberlake, 1941 | |
| Stelis pavonina Cockerell, 1908 | |
| Stelis robertsoni Timberlake, 1941 | |
| Stelis rubi Cockerell, 1898 | |
| Stelis semirubra Timberlake, 1941 | |
| Stelis shoshone Parker & Gri..., 2013 | |
| Stelis subglauca Cockerell, 1925 | |
| Stelis texana Thorp, 1966 | |
| Stelis trichopyga Timberlake, 1941 | |
| Stelis trypetinum (Robertson, 1902) | ⇒ Stelis permaculata Cockerell, 1898 |
| Stelis vernalis Mitchell, 1962 | |
| Titusella pronitens Cockerell, 1906 | |
| Trachusa (Heteranthidium) bequaerti Schwarz, 1926 | |
| Trachusa (Heteranthidium) cordaticeps Michener, 1949 | |
| Trachusa (Heteranthidium) dorsalis Lepeletier, 1841 | |
| Trachusa (Heteranthidium) gummifera Thorp, 1963 | |
| Trachusa (Heteranthidium) larreae Cockerell, 1897 | |
| Trachusa (Heteranthidium) occidentalis Cresson, 1868 | |
| Trachusa (Heteranthidium) timberlakei Schwarz, 1928 | |
| Trachusa (Heteranthidium) zebrata Cresson, 1872 | |
| Trachusa (Legnanthidium) ridingsii Cresson, 1878 | |
| Trachusa (Trachusa) byssina Panzer, 1798 | |
| Trachusa (Trachusomimus) perdita Cockerell, 1904 | California leafcutting bee |
| Trachusa (Ulanthidium) manni Crawford, 1917 | |
| Trachusa autumnalis Snelling, 1966 | |
| Trachusa crassipes Cresson, 1878 | |
| Trachusa fontemvitae Schwarz, 1926 | |
| Trachusa interdisciplinaris Peters, 1972 | |
| Xeroheriades micheneri Griswold, 1986 | Mammoth Cave amphipod |
