| Afroheriades prima Peters, 1970 | |
| Anthidiellum (Loyolanthidium) notatum Latreille, 1809 | Cancellate semele |
| Anthidium (Anthidium) clypeodentatum Swenk, 1914 | |
| Anthidium (Anthidium) cockerelli Schwarz, 1928 | |
| Anthidium (Anthidium) collectum Huard, 1896 | |
| Anthidium (Anthidium) edwardsii Cresson, 1878 | Edwards´ Wool-carder Bee |
| Anthidium (Anthidium) emarginatum Say, 1824 | |
| Anthidium (Anthidium) jocosum Cresson, 1878 | |
| 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) placitum Cresson, 1879 | |
| Anthidium (Anthidium) porterae Cockerell, 1900 | Porter´s Wool-carder Bee |
| Anthidium (Anthidium) psoraleae Robertson, 1902 | |
| 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 |
| Ashmeadiella (Arogochila) timberlakei Michener, 1936 | |
| Ashmeadiella (Ashmeadiella) aridula Cockerell, 1910 | |
| Ashmeadiella (Ashmeadiella) bucconis Say, 1837 | |
| Ashmeadiella (Chilosmia) rhodognatha Cockerell, 1924 | |
| Atoposmia (Eremosmia) enceliae Cockerell, 1935 | |
| Atoposmia (Eremosmia) robustula Cockerell, 1935 | |
| Atoposmia (Hexosmia) copelandica Cockerell, 1908 | |
| Chelostoma (Foveosmia) californicum Cresson, 1878 | |
| Chelostoma (Prochelostoma) philadelphi Robertson, 1891 | Mock-Orange Scissor Bee |
| Coelioxys (Acrocoelioxys) dolichos Fox, 1890 | Carpenter-mimic Cuckoo-leaf-cutter |
| Coelioxys (Acrocoelioxys) producta Cresson, 1865 | |
| Coelioxys (Boreocoelioxys) banksi Crawford, 1914 | |
| Coelioxys (Boreocoelioxys) funeraria Smith, 1854 | |
| 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) rufitarsis Smith, 1854 | Red-Footed Cuckoo Leaf-Cutter Bee |
| Coelioxys (Boreocoelioxys) sayi Robertson, 1897 | Say'S Cuckoo Leaf-Cutter Bee |
| Coelioxys (Coelioxys) hirsutissima Cockerell, 1912 | |
| Coelioxys (Coelioxys) immaculata Cockerell, 1912 | |
| Coelioxys (Coelioxys) sodalis Cresson, 1878 | Comrade Cuckoo Leafcutter Bee |
| 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 (Glyptocoelioxys) germana Cresson, 1878 | |
| Coelioxys (Haplocoelioxys) mexicana Cresson, 1878 | Mexican Cuckoo-leaf-cutter |
| 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 (Xerocoelioxys) edita Cresson, 1872 | |
| Coelioxys (Xerocoelioxys) grindeliae Cockerell, 1900 | |
| Coelioxys erysimi Cockerell, 1912 | |
| Coelioxys novomexicana Cockerell, 1909 | |
| Dianthidium (Dianthidium) concinnum Cresson, 1872 | |
| Dianthidium (Dianthidium) cressonii Dalla Torre, 1896 | |
| Dianthidium (Dianthidium) curvatum Smith, 1854 | |
| Dianthidium (Dianthidium) parvum Cresson, 1878 | |
| Dianthidium (Dianthidium) pudicum Cresson, 1879 | |
| Dianthidium (Dianthidium) simile Cresson, 1864 | Northeastern Pebble Bee |
| Dianthidium (Dianthidium) subparvum Swenk, 1914 | |
| Dianthidium (Dianthidium) ulkei Cresson, 1878 | |
| Heriades (Neotrypetes) carinatus Cresson, 1864 | |
| Heriades (Neotrypetes) leavitti Crawford, 1913 | Leavitt'S Armored-Resin Bee |
| Heriades (Neotrypetes) variolosus (Cresson, 1872) | ⇒ Heriades variolosa Cresson, 1872 |
| Hoplitis (Alcidamea) grinnelli Cockerell, 1910 | |
| Hoplitis (Alcidamea) pilosifrons Cresson, 1864 | Hairy-Fronted 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 (Formicapis) robusta Nylander, 1848 | |
| Hoplitis (Hoplitina) howardi Cockerell, 1910 | |
| Hoplitis (Hoplitis) anthocopoides Schenck, 1853 | Mason Bee |
| Hoplitis (Monumetha) albifrons Kirby, 1837 | White-Fronted Small-Mason |
| Hoplitis (Monumetha) fulgida Cresson, 1864 | |
| Hoplitis (Monumetha) spoliata Provancher, 1888 | Dilated-Horned Small-Mason |
| Hoplitis (Monumetha) viridimicans Cockerell, 1897 | |
| Hoplitis (Proteriades) bunocephala Michener, 1947 | |
| Hoplitis (Proteriades) palmarum Cockerell, 1935 | |
| Hoplitis (Proteriades) semirubra Cockerell, 1898 | |
| Hoplitis (Proteriades) xerophila Cockerell, 1935 | |
| Hoplitis (Robertsonella) micheneri Mitchell, 1962 | |
| Hoplitis (Robertsonella) simplex Cresson, 1864 | |
| Hoplitis sambuci Titus, 1904 | |
| Lithurgus (Lithurgopsis) apicalis (Cresson, 1875) | ⇒ Lithurgopsis apicalis Cresson, 1875 |
| Megachile (Acentron) albitarsis Cresson, 1872 | White-footed Leaf-cutter Bee |
| Megachile (Argyropile) parallela Smith, 1853 | Parallel Leaf-cutter Bee |
| Megachile (Argyropile) townsendiana Cockerell, 1898 | |
| Megachile (Austromegachile) trigonaspis Schrottky, 1913 | |
| Megachile (Callomegachile) sculpturalis Smith, 1853 | Giant resin bee |
| Megachile (Chelostomoides) angelarum Cockerell, 1902 | |
| Megachile (Chelostomoides) campanulae Robertson, 1903 | Bellflower resin bee |
| Megachile (Chelostomoides) exilis Cresson, 1872 | Slender Resin Bee |
| Megachile (Chelostomoides) georgica Cresson, 1878 | |
| Megachile (Chelostomoides) rugifrons Smith, 1854 | Rugose-Fronted Resin Bee |
| Megachile (Chelostomoides) spinotulata Mitchell, 1934 | |
| Megachile (Chelostomoides) subexilis Cockerell, 1908 | |
| Megachile (Cressoniella) zapoteca Cresson, 1878 | |
| Megachile (Dasymegachile) chilensis (Spinola, 1851) | ⇒ Megachile saulcyi Guérin-Ménev..., 1845 |
| Megachile (Eutricharaea) apicalis (Spinola, 1808) | ⇒ Megachile analis Nylander, 1852 |
| Megachile (Eutricharaea) concinna Smith, 1853 | Elegant leaf-cutter bee |
| 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) gentilis Cresson, 1872 | Leafcutter bee |
| Megachile (Litomegachile) lippiae Cockerell, 1900 | |
| Megachile (Litomegachile) mendica Cresson, 1878 | Flat-tailed Leaf-cutter Bee |
| 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) montivaga Cresson, 1878 | Silver-tailed Petal-cutter Bee |
| Megachile (Megachile) relativa Cresson, 1878 | Golden-Tailed Leafcutter |
| Megachile (Megachiloides) anograe Cockerell, 1908 | |
| Megachile (Megachiloides) coloradensis (Mitchell, 1936) | ⇒ Megachile zapoteca Cresson, 1878 |
| Megachile (Megachiloides) dakotensis Mitchell, 1926 | |
| Megachile (Megachiloides) deflexa Cresson, 1878 | |
| Megachile (Megachiloides) integra Cresson, 1878 | |
| Megachile (Megachiloides) manifesta Cresson, 1878 | |
| Megachile (Megachiloides) nevadensis Cresson, 1879 | |
| Megachile (Megachiloides) oenotherae Mitchell, 1924 | |
| Megachile (Megachiloides) rubi Mitchell, 1924 | |
| Megachile (Megachiloides) wheeleri Mitchell, 1927 | |
| Megachile (Melanosarus) bahamensis Mitchell, 1927 | Bahama Leaf-cutter Bee |
| Megachile (Melanosarus) xylocopoides Smith, 1853 | Carpenter-mimic Leaf-cutter Bee |
| Megachile (Neoeutrichaea) rotundata Fabricius, 1793 | Alfalfa leaf-cutter bee |
| Megachile (Pseudocentron) pruina Smith, 1853 | Hoary Leaf-cutter Bee |
| Megachile (Pseudocentron) sidalceae Cockerell, 1897 | |
| Megachile (Sayapis) fidelis Cresson, 1878 | Faithful leafcutting bee |
| Megachile (Sayapis) frugalis Cresson, 1872 | |
| Megachile (Sayapis) inimica Cresson, 1872 | Hostile Leaf-cutter Bee |
| 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 (Xanthosarus) addenda Cresson, 1878 | Cranberry Leafcutter |
| Megachile (Xanthosarus) agustini Cockerell, 1905 | |
| 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) ingenua Cresson, 1878 | |
| 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 hilata Mitchell, 1934 | |
| Megachile mellitarsis Cresson, 1878 | |
| Megachile perplexa Smith, 1853 | |
| Megachile zaptlana Cresson, 1878 | |
| Osmia (Acanthosmioides) integra Cresson, 1878 | |
| Osmia (Acanthosmioides) kenoyeri (Cockerell, 1915) | ⇒ Osmia tarsata Provancher, 1888 |
| Osmia (Cephalosmia) marginipennis Cresson, 1878 | |
| Osmia (Cephalosmia) montana Cresson, 1864 | |
| Osmia (Cephalosmia) subaustralis Cockerell, 1900 | |
| Osmia (Diceratosmia) conjuncta Cresson, 1864 | |
| Osmia (Diceratosmia) subfasciata Cresson, 1872 | |
| Osmia (Helicosmia) caerulescens (Linnaeus, 1758) | ⇒ Osmia caerulescens Linnaeus, 1758 |
| Osmia (Helicosmia) chalybea Smith, 1853 | Stout tagelus |
| Osmia (Helicosmia) coloradensis Cresson, 1878 | Colorado Osmia |
| Osmia (Helicosmia) georgica Cresson, 1878 | Georgia Mason |
| Osmia (Melanosmia) albiventris Cresson, 1864 | |
| Osmia (Melanosmia) atriventris Cresson, 1864 | Maine blueberry bee |
| Osmia (Melanosmia) brevis Cresson, 1864 | |
| Osmia (Melanosmia) bucephala Cresson, 1864 | Bufflehead Mason Bee |
| Osmia (Melanosmia) clarescens Cockerell, 1911 | |
| Osmia (Melanosmia) collinsiae Robertson, 1905 | Collinsia Mason |
| Osmia (Melanosmia) densa Cresson, 1864 | |
| Osmia (Melanosmia) distincta Cresson, 1864 | Distinct Mason Bee |
| Osmia (Melanosmia) felti Cockerell, 1911 | |
| Osmia (Melanosmia) inermis Zetterstedt, 1838 | Mountain mason bee |
| Osmia (Melanosmia) inspergens Lovell & Coc..., 1907 | Shiny-Faced Mason Bee |
| Osmia (Melanosmia) juxta Cresson, 1864 | |
| Osmia (Melanosmia) nigriventris Zetterstedt, 1838 | |
| Osmia (Melanosmia) proxima Cresson, 1864 | |
| Osmia (Melanosmia) pumila Cresson, 1864 | Dwarf Mason Bee |
| Osmia (Melanosmia) sandhouseae Mitchell, 1927 | |
| 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) virga Sandhouse, 1939 | Twig Mason Bee |
| Osmia (Osmia) cornifrons Radoszkowski, 1887 | Horn-faced bee |
| Osmia (Osmia) lignaria Say, 1837 | Blue orchard bee |
| Osmia (Osmia) taurus Smith, 1873 | Alternate-leaf dogwood |
| Osmia laticeps Thomson, 1872 | Alfilaree |
| Osmia michiganensis Mitchell, 1962 | |
| Osmia subarctica Cockerell, T., 1912 | |
| Osmia tarsata Provancher, 1888 | Freckled milkvetch |
| Osmia trevoris Cockerell, 1897 | |
| Paranthidium (Paranthidium) jugatorium Say, 1824 | Sunflower Burrowing-Resin Bee |
| Protosmia (Chelostomopsis) rubifloris Cockerell, 1898 | |
| Pseudoheriades (Afroheriades) primus (Peters, 1970) | ⇒ Afroheriades prima Peters, 1970 |
| Stelis (Dolichostelis) louisae Cockerell, 1911 | |
| Stelis (Dolichostelis) perpulchra Crawford, 1916 | |
| Stelis (Dolichostelis) rudbeckiarum Cockerell, 1904 | |
| Stelis (Stelis) coarctatus Crawford, 1916 | Constrained Cuckoo Carder Bee |
| Stelis (Stelis) diversicolor Crawford, 1916 | |
| 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) subemarginata Cresson, 1878 | |
| Stelis foederalis Smith, 1854 | Federal Cuckoo Carder Bee |
| Stelis micheneri Linsley, 1939 | |
| Stelis michiganensis Mitchell, 1962 | |
| Stelis nitida Cresson, 1878 | |
| Stelis rubi Cockerell, 1898 | |
| Stelis vernalis Mitchell, 1962 | |
| 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 (Trachusomimus) perdita Cockerell, 1904 | California leafcutting bee |
