| Afranthidium (Immanthidium) junodi Friese, 1904 | |
| Afranthidium (Immanthidium) repetitum Schulz, 1906 | Carder bee |
| Afranthidium braunsi Friese, 1904 | |
| Afranthidium hoplogastrum Mavromoustakis, 1934 | |
| Anthidium (Anthidium) cockerelli Schwarz, 1928 | |
| Anthidium (Anthidium) collectum Huard, 1896 | |
| Anthidium (Anthidium) manicatum Linnaeus, 1758 | Continental Wool-carder Bee |
| Anthidium manicatum manicatum Linnaeus, 1758 | |
| Anthidium manicatum nigrithorax Dalla Torre, 1877 | |
| Anthidium (Anthidium) palliventre Cresson, 1878 | |
| 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 | |
| Ashmeadiella floridana Robertson, 1897 | |
| Chalicodoma (Pseudomegachile) ericetorum (Lepeletier, 1841) | ⇒ Megachile ericetorum Lepeletier, 1841 |
| Chalicodoma parietina (Geoffroy, 1785) | ⇒ Megachile parietina Geoffroy, 1785 |
| Chelostoma (Chelostoma) florisomne (Linnaeus, 1758) | ⇒ Chelostoma campanularum Kirby, 1802 |
| Chelostoma (Foveosmia) campanularum Kirby, 1802 | Carpenter bee |
| Chelostoma (Foveosmia) phaceliae Michener, 1938 | |
| Coelioxys (Acrocoelioxys) producta Cresson, 1865 | |
| Coelioxys (Allocoelioxys) afra Lepeletier, 1841 | Short Sharp-tail Bee |
| Coelioxys (Allocoelioxys) brevis (Eversmann, 1852) | ⇒ Coelioxys octodentata Say, 1824 |
| Coelioxys (Boreocoelioxys) funeraria Smith, 1854 | |
| Coelioxys (Boreocoelioxys) octodentata Say, 1824 | Eight-toothed Cuckoo-leaf-cutter |
| Coelioxys (Boreocoelioxys) porterae Cockerell, 1900 | Porter'S Cuckoo Leaf-Cutter Bee |
| Coelioxys (Boreocoelioxys) rufitarsis Smith, 1854 | Red-Footed Cuckoo Leaf-Cutter Bee |
| Coelioxys (Coelioxys) albolineata Cockerell, 1905 | |
| Coelioxys (Coelioxys) conoidea (Illiger, 1806) | ⇒ Coelioxys inermis Kirby, 1802 |
| Coelioxys (Coelioxys) elongata Lepeletier, 1841 | Dull-Vented Sharp-Tail |
| Coelioxys (Coelioxys) inermis Kirby, 1802 | Shiny-Vented Sharp-Tail |
| Coelioxys (Coelioxys) mandibularis Nylander, 1848 | Blue Ridge Mountain amphipod |
| Coelioxys (Coelioxys) quadridentata Linnaeus, 1758 | Four-toothed sharp-tailed bee |
| Coelioxys (Coelioxys) rufescens Lepeletier &..., 1825 | Rufescent Sharp-Tail |
| Coelioxys (Neocoelioxys) abdominalis Guérin-Ménev..., 1845 | |
| Coelioxys caeruleipennis Friese, 1904 | |
| Coelioxys circumscripta Schulz, 1906 | |
| Coelioxys conica Linnaeus, 1758 | |
| Coelioxys intacta Friese, 1923 | |
| Coelioxys loricula Smith, 1854 | |
| Coelioxys vectis Curtis, 1831 | |
| Dianthidium (Dianthidium) subparvum Swenk, 1914 | |
| Diaperidium mithrax ♰ J. O. Westwood, 1854 | |
| Heriades (Heriades) freygessneri Schletterer, 1889 | |
| Heriades (Heriades) truncorum Linnaeus, 1758 | Large-headed Resin Bee |
| Heriades (Neotrypetes) texanus (Michener, 1938) | ⇒ Heriades texana Michener, 1938 |
| Heriades rubicola (Perez, 1890) | ⇒ Heriades rubicolus Perez, 1890 |
| Heriades rubicolus Perez, 1890 | |
| Hoplitis (Alcidamea) claviventris Thomson, 1872 | Welted lesser mason bee |
| Hoplitis fulgida platyura | |
| Hoplitis (Alcidamea) leucomelana Kirby, 1802 | Black and white lesser mason bee |
| Hoplitis (Anthocopa) spinulosa Kirby, 1802 | Spined mason bee |
| Hoplitis (Hoplitis) adunca Panzer, 1798 | Viper's Bugloss Mason Bee |
| Hoplitis (Monumetha) spoliata Provancher, 1888 | Dilated-Horned Small-Mason |
| Hoplitis (Proteriades) palmarum Cockerell, 1935 | |
| Hoplitis brachypogon brachypogon Perez, 1879 | |
| Hoplosmia (Hoplosmia) spinulosa (Kirby, 1802) | ⇒ Osmia spinulosa Kirby, 1802 |
| Megachile (Argyropile) parallela Smith, 1853 | Parallel Leaf-cutter Bee |
| Megachile (Callomegachile) flavipennis Smith, 1853 | Stout tagelus |
| Megachile (Callomegachile) rufipes Fabricius, 1781 | |
| Megachile (Chalicodoma) parietina Geoffroy, 1785 | Black Mud Bee |
| Megachile (Chalicodomoides) aethiops Smith, 1853 | Stout tagelus |
| Megachile (Chelostomoides) prosopidis (Cockerell, 1900) | ⇒ Megachile occidentalis Fox, 1894 |
| Megachile (Creightonella) discolor Smith, 1853 | Stout tagelus |
| Megachile (Delomegachile) willughbiella Kirby, 1802 | |
| Megachile willughbiella hibernica Perkins, R.C.L., 1925 | |
| Megachile willughbiella willughbiella Kirby, 1802 | |
| Megachile (Eurymella) vittatula (Cockerell, 1920) | ⇒ Megachile riggenbachiana Strand, 1911 |
| Megachile (Eutricharaea) apicalis (Spinola, 1808) | ⇒ Megachile analis Nylander, 1852 |
| Megachile (Eutricharaea) captionis Cockerell, 1914 | |
| Megachile (Eutricharaea) chrysopyga Smith, 1853 | Stout tagelus |
| Megachile (Eutricharaea) dorsalis (Perez, 1879) | ⇒ Megachile leachella Curtis, 1828 |
| Megachile (Eutricharaea) gratiosa Smith, 1853 | |
| Megachile (Eutricharaea) leachella Curtis, 1828 | Megachile dorsalis |
| Megachile (Eutricharaea) macularis Dalla Torre, 1896 | |
| Megachile (Eutricharaea) obtusa Smith, 1853 | Stout tagelus |
| Megachile (Eutricharaea) semiflava (Cockerell, 1937) | ⇒ Megachile cordata Smith, 1879 |
| Megachile (Eutricharaea) sequior Cockerell, 1910 | |
| Megachile (Eutricharaea) simplex (Smith, 1853) | ⇒ Megachile inermis Provancher, 1888 |
| Megachile (Eutricharaea) venusta Smith, 1853 | Stout tagelus |
| Megachile (Eutricharea) gahani Cockerell, 1906 | |
| Megachile (Eutricharea) maculariformis (Cockerell, 1907) | ⇒ Megachile chrysopyga Smith, 1853 |
| Megachile (Gronoceras) cincta Fabricius, 1781 | |
| Megachile (Gronoceras) felina Gerstäcker, 1857 | |
| Megachile (Hackeriapis) aurifrons Smith, 1853 | Stout tagelus |
| Megachile (Hackeriapis) canifrons Smith, 1853 | Stout tagelus |
| Megachile (Hackeriapis) erythropyga Smith, 1853 | Stout tagelus |
| Megachile (Hackeriapis) ferox Smith, 1879 | Bunchberry dogwood |
| Megachile (Hackeriapis) fultoni Cockerell, 1913 | |
| Megachile (Hackeriapis) heriadiformis Smith, 1853 | |
| Megachile (Hackeriapis) lucidiventris Smith, 1853 | Stout tagelus |
| Megachile (Hackeriapis) mackayensis Cockerell, 1910 | |
| Megachile (Hackeriapis) monkmani Rayment, 1935 | |
| Megachile (Hackeriapis) oblonga (Smith, 1879) | ⇒ Hoplitis albifrons Kirby, 1837 |
| Megachile (Hackeriapis) ordinaria Smith, 1853 | Stout tagelus |
| Megachile (Hackeriapis) rhodura Cockerell, 1906 | |
| Megachile (Hackeriapis) semicandens Cockerell, 1910 | |
| Megachile (Hackeriapis) semiluctuosa Smith, 1853 | Stout tagelus |
| Megachile (Hackeriapis) tosticauda Cockerell, 1912 | |
| Megachile (Hackeriapis) variabilis King, 1994 | |
| Megachile (Leptorachis) petulans Cresson, 1878 | Petulant Leaf-cutter Bee |
| Megachile (Litomegachile) brevis (Say, 1837) | ⇒ Megachile pseudobrevis Mitchell, 1934 |
| Megachile (Litomegachile) coquilletti Cockerell, 1915 | |
| Megachile (Litomegachile) lippiae Cockerell, 1900 | |
| Megachile (Litomegachile) mendica Cresson, 1878 | Flat-tailed Leaf-cutter Bee |
| Megachile (Megachile) centuncularis Linnaeus, 1758 | Common leaf-cutter bee |
| Megachile (Megachile) lapponica Thomson, 1872 | Alfilaree |
| Megachile (Megachile) ligniseca Kirby, 1802 | Wood-Carving Leaf-Cutter Bee |
| Megachile (Megachile) relativa Cresson, 1878 | Golden-Tailed Leafcutter |
| Megachile (Megachile) versicolor Smith, 1844 | Brown-Footed Leaf-Cutter |
| Megachile versicolor hiberniae (Perkins, 1925) | ⇒ Megachile versicolor Smith, 1844 |
| Megachile (Megachiloides) dakotensis Mitchell, 1926 | |
| Megachile (Megachiloides) rubi Mitchell, 1924 | |
| Megachile (Neoeutrichaea) rotundata Fabricius, 1793 | Alfalfa leaf-cutter bee |
| Megachile (Pseudomegachile) ericetorum Lepeletier, 1841 | Banded Mud Bee |
| Megachile (Pseudomegachile) fulva Smith, 1853 | Stout tagelus |
| Megachile (Pseudomegachile) kigonserana Friese, 1903 | |
| Megachile (Pseudomegachile) lanata Fabricius, 1775 | Wooly Wall Bee |
| Megachile (Pseudomegachile) sinuata Friese, 1903 | |
| Megachile (Sayapis) pugnata Say, 1837 | Pugnacious Leaf-cutter Bee |
| Megachile (Schizomegachile) monstrosa Smith, 1868 | |
| Megachile (Thaumatosoma) duboulaii Smith, 1865 | Black-and-yellow cuthona |
| Megachile (Xanthosarus) circumcincta Kirby, 1802 | Black-headed leaf-cutter bee |
| Megachile (Xanthosarus) dentitarsus Sladen, 1919 | |
| Megachile (Xanthosarus) frigida Smith, 1853 | Frigid Leaf-cutter Bee |
| Megachile (Xanthosarus) latimanus Say, 1823 | Broad-handed Leaf-cutter Bee |
| Megachile (Xanthosarus) maritima Kirby, 1802 | Coast Leaf-Cutter |
| Megachile (Xanthosarus) willughbiella (Kirby, 1802) | ⇒ Megachile willughbiella Kirby, 1802 |
| Megachile atrella Cockerell, 1906 | |
| Megachile clypeata Smith, 1853 | Stout tagelus |
| Megachile cyanescens Friese, ., 1904 | |
| Megachile demeter Cockerell, 1937 | |
| Megachile eurimera Smith, 1854 | Stout tagelus |
| Megachile jerryrozeni Genaro, 2003 | |
| Megachile leeuwinensis Meade-Waldo, 1915 | |
| Megachile rhyssalus Wu, 2005 | |
| Megachile riggenbachiana Strand, 1911 | |
| Megachile turneri Meade-Waldo, 1913 | |
| Osmia (Acanthosmioides) unca Michener, 1937 | |
| Osmia (Cephalosmia) montana Cresson, 1864 | |
| Osmia (Chalcosmia) caerulescens Linnaeus, 1758 | |
| Osmia (Chalcosmia) leaiana Kirby, 1802 | |
| Osmia (Chalcosmia) niveata Fabricius, 1804 | |
| Osmia (Helicosmia) aurulenta Panzer, 1799 | Gold-Fringed Mason Bee |
| 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) leaiana (Kirby, 1802) | ⇒ Osmia leaiana Kirby, 1802 |
| Osmia (Helicosmia) niveata (Fabricius, 1804) | ⇒ Osmia niveata Fabricius, 1804 |
| Osmia (Melanosmia) atriventris Cresson, 1864 | Maine blueberry bee |
| Osmia (Melanosmia) bakeri (Sandhouse, 1924) | ⇒ Osmia melanopleura Cockerell, 1916 |
| Osmia (Melanosmia) bruneri Cockerell, 1897 | |
| Osmia (Melanosmia) collinsiae Robertson, 1905 | Collinsia Mason |
| Osmia (Melanosmia) cyanella Cockerell, 1897 | |
| Osmia (Melanosmia) gaudiosa Cockerell, 1907 | |
| Osmia (Melanosmia) inermis Zetterstedt, 1838 | Mountain mason bee |
| Osmia (Melanosmia) inspergens Lovell & Coc..., 1907 | Shiny-Faced Mason Bee |
| Osmia (Melanosmia) laeta Sandhouse, 1924 | |
| Osmia (Melanosmia) paradisica Sandhouse, 1924 | |
| Osmia (Melanosmia) parietina (Curtis, 1828) | ⇒ Osmia inermis Zetterstedt, 1838 |
| Osmia (Melanosmia) pilicornis Smith, 1846 | Fringe Horned Mason Bee |
| Osmia (Melanosmia) proxima Cresson, 1864 | |
| Osmia (Melanosmia) tersula Cockerell, 1912 | Wide-Banded Mason Bee |
| Osmia (Melanosmia) texana Cresson, 1872 | Texas Mason Bee |
| Osmia (Melanosmia) uncinata (Gerstäcker, 1869) | ⇒ Osmia unca Michener, 1937 |
| Osmia (Melanosmia) virga Sandhouse, 1939 | Twig Mason Bee |
| Osmia (Melanosmia) xanthomelana Kirby, 1802 | Cliff Mason Bee |
| Osmia (Neosmia) bicolor Schrank, 1781 | Red-tailed Mason Bee |
| Osmia (Osmia) cornuta Latreille, 1805 | Mason bee |
| Osmia (Osmia) lignaria Say, 1837 | Blue orchard bee |
| Osmia (Osmia) ribifloris Cockerell, 1900 | Blueberry bee |
| Osmia (Osmia) rufa (Linnaeus, 1758) | ⇒ Osmia bicornis Linnaeus, 1758 |
| Osmia (Pyrosmia) pusilla Cresson, 1864 | |
| Osmia bicornis Linnaeus, 1758 | Chrysanthemum gall midge |
| Osmia dolerosa Sandhouse, 1939 | |
| Osmia papaveris (Latreille, 1799) | ⇒ Hoplitis papaveris Latreille, 1799 |
| Osmia pentstemonis Cockerell, 1906 | |
| Osmia spinulosa Kirby, 1802 | Spined Mason Bee |
| Plesianthidium calescens Cockerell, 1921 | |
| Plesianthidium neli Brauns, 1929 | |
| Plesianthidium volkmanni Friese, 1909 | |
| Protosmia (Chelostomopsis) rubifloris Cockerell, 1898 | |
| Pseudoanthidium tuberculiferum Brauns, 1905 | |
| Stelis (Stelidium) ashmeadiella | |
| Stelis (Stelis) montana Cresson, 1864 | |
| Stelis (Stelis) phaeoptera Kirby, 1802 | Plain dark bee |
| Stelis breviuscula Nylander, 1848 | Little dark bee |
| Stelis ornatula Klug, 1807 | Spotted dark bee |
| Stelis punctulatissima Kirby, 1802 | Banded dark bee |
| Trachusa (Heteranthidium) bequaerti Schwarz, 1926 | |
