| Anthidiellum (Loyolanthidium) ehrhorni Cockerell, 1900 | |
| Anthidiellum (Loyolanthidium) notatum Latreille, 1809 | Cancellate semele |
| Anthidium (Anthidium) atripes Cresson, 1879 | |
| Anthidium (Anthidium) cockerelli Schwarz, 1928 | |
| Anthidium (Anthidium) edwardsii Cresson, 1878 | Edwards´ Wool-carder Bee |
| Anthidium (Anthidium) emarginatum Say, 1824 | |
| 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) paroselae Cockerell, 1898 | |
| Anthidium (Anthidium) porterae Cockerell, 1900 | Porter´s Wool-carder Bee |
| Anthidium (Anthidium) psoraleae Robertson, 1902 | |
| Anthidium (Proanthidium) oblongatum Illiger, 1806 | Oblong wool carder bee |
| Anthidium cochimi Snelling, 1992 | |
| Anthidium michenerorum Gonzalez & G..., 2013 | |
| Anthidium texanum Cresson, 1878 | |
| Ashmeadiella (Arogochila) erema Michener, 1939 | |
| Ashmeadiella (Ashmeadiella) bigeloviae Cockerell, 1897 | |
| Ashmeadiella (Ashmeadiella) bucconis Say, 1837 | |
| Ashmeadiella (Ashmeadiella) cactorum (Cockerell, 1897) | ⇒ Ashmeadiella aridula Cockerell, 1910 |
| Ashmeadiella (Ashmeadiella) cubiceps Cresson, 1879 | |
| Ashmeadiella (Ashmeadiella) foveata Michener, 1939 | |
| Ashmeadiella (Ashmeadiella) gillettei Titus, 1904 | |
| Ashmeadiella (Ashmeadiella) leucozona Cockerell, 1924 | |
| Ashmeadiella (Ashmeadiella) maxima Michener, 1936 | |
| Ashmeadiella (Ashmeadiella) opuntiae Cockerell, 1897 | |
| Ashmeadiella (Ashmeadiella) prosopidis Cockerell, 1897 | |
| Ashmeadiella (Ashmeadiella) sonora Michener, 1939 | |
| Ashmeadiella (Chilosmia) rhodognatha Cockerell, 1924 | |
| Ashmeadiella (Cubitognatha) xenomastax Michener, 1939 | |
| Ashmeadiella (Isosmia) rubrella Michener, 1949 | |
| Ashmeadiella gilletei | |
| Ashmeadiella holtii Cockerell, 1898 | |
| Ashmeadiella meliloti Cockerell, 1897 | |
| Ashmeadiella truncativentris Michener, 1951 | |
| 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) robustula Cockerell, 1935 | |
| Atoposmia (Eremosmia) timberlakei Cockerell, 1935 | |
| Chalicodoma davidsoni Cockerell, 1902 | |
| Chalicodoma georgica Cresson, 1878 | |
| Chalicodoma subexilis Cockerell, 1908 | |
| Coelioxys (Acrocoelioxys) dolichos Fox, 1890 | Carpenter-mimic Cuckoo-leaf-cutter |
| Coelioxys (Acrocoelioxys) producta Cresson, 1865 | |
| Coelioxys (Boreocoelioxys) insita Cresson, 1872 | |
| Coelioxys (Boreocoelioxys) octodentata Say, 1824 | Eight-toothed Cuckoo-leaf-cutter |
| Coelioxys (Boreocoelioxys) pratti Crawford, 1914 | |
| 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 (Cyrtocoelioxys) hunteri Crawford, 1914 | Hunter´s Cuckoo-leaf-cutter |
| Coelioxys (Cyrtocoelioxys) modesta Smith, 1854 | Modest Cuckoo-leaf-cutter |
| Coelioxys (Cyrtocoelioxys) scitula Cresson, 1872 | |
| Coelioxys (Haplocoelioxys) mexicana Cresson, 1878 | Mexican Cuckoo-leaf-cutter |
| Coelioxys (Neocoelioxys) menthae Cockerell, 1897 | |
| 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 (Xerocoelioxys) piercei Crawford, 1914 | |
| Coelioxys asteris Crawford, 1914 | |
| Coelioxys mitchelli Baker, 1975 | |
| Coelioxys novomexicana Cockerell, 1909 | |
| Dianthidium (Dianthidium) concinnum Cresson, 1872 | |
| Dianthidium (Dianthidium) curvatum Smith, 1854 | |
| Dianthidium (Dianthidium) simile Cresson, 1864 | Northeastern Pebble Bee |
| Dianthidium discors Timberlake, 1948 | |
| Dianthidium implicatum Timberlake, 1948 | |
| Dianthidium parkeri Grigarick & ..., 1964 | |
| Heriades (Neotrypetes) carinatus Cresson, 1864 | |
| Heriades (Neotrypetes) gracilior Cockerell, 1897 | |
| Heriades (Neotrypetes) leavitti Crawford, 1913 | Leavitt'S Armored-Resin Bee |
| Heriades (Neotrypetes) texanus (Michener, 1938) | ⇒ Heriades texana Michener, 1938 |
| Heriades (Neotrypetes) variolosus (Cresson, 1872) | ⇒ Heriades variolosa Cresson, 1872 |
| Heriades micropthalma Michener, 1954 | Long-legged cave amphipod |
| Hoplitis (Alcidamea) grinnelli Cockerell, 1910 | |
| Hoplitis (Alcidamea) pilosifrons Cresson, 1864 | Hairy-Fronted Small-Mason |
| Hoplitis (Alcidamea) truncata Cresson, 1878 | Truncate Small-Mason |
| Hoplitis (Dasyosmia) biscutellae Cockerell, 1897 | |
| Hoplitis (Monumetha) albifrons Kirby, 1837 | White-Fronted Small-Mason |
| Hoplitis (Monumetha) spoliata Provancher, 1888 | Dilated-Horned Small-Mason |
| Hoplitis (Proteriades) palmarum Cockerell, 1935 | |
| Hoplitis (Robertsonella) simplex Cresson, 1864 | |
| Hoplitis gleasoni Titus, 1904 | |
| Hoplitis monardae Cockerell, 1914 | |
| Hoplitis nemophilae Neff, 2009 | |
| Hoplitis paroselae Michener, 1947 | |
| Megachile (Acentron) albitarsis Cresson, 1872 | White-footed Leaf-cutter Bee |
| 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 (Chelostomoides) campanulae Robertson, 1903 | Bellflower resin bee |
| Megachile (Chelostomoides) chilopsidis Cockerell, 1900 | Desert-willow Resin Bee |
| Megachile (Chelostomoides) discorhina Cockerell, 1924 | |
| Megachile (Chelostomoides) exilis Cresson, 1872 | Slender Resin Bee |
| Megachile (Chelostomoides) georgica Cresson, 1878 | |
| Megachile (Chelostomoides) odontostoma Cockerell, 1924 | |
| Megachile (Chelostomoides) prosopidis (Cockerell, 1900) | ⇒ Megachile occidentalis Fox, 1894 |
| Megachile (Chelostomoides) spinotulata Mitchell, 1934 | |
| Megachile (Chelostomoides) texensis Mitchell, 1956 | |
| 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) 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) montivaga Cresson, 1878 | Silver-tailed Petal-cutter Bee |
| Megachile (Megachiloides) amica Cresson, 1872 | |
| Megachile (Megachiloides) casadae Cockerell, 1898 | |
| Megachile (Megachiloides) dakotensis Mitchell, 1926 | |
| Megachile (Megachiloides) deflexa Cresson, 1878 | |
| Megachile (Megachiloides) fucata Mitchell, 1934 | |
| Megachile (Megachiloides) hookeri Cockerell, 1915 | |
| Megachile (Megachiloides) integra Cresson, 1878 | |
| Megachile (Megachiloides) mucorosa Cockerell, 1908 | |
| Megachile (Megachiloides) oenotherae Mitchell, 1924 | |
| Megachile (Megachiloides) subnigra Cresson, 1879 | |
| Megachile (Megachiloides) xerophila Cockerell, 1933 | |
| Megachile (Melanosarus) xylocopoides Smith, 1853 | Carpenter-mimic Leaf-cutter Bee |
| Megachile (Neochelynia) chichimeca Cresson, 1878 | |
| 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) 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) comata Cresson, 1872 | |
| Megachile (Xanthosarus) fortis Cresson, 1872 | |
| 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 abducta Mitchell, 1926 | |
| Megachile bishoppi Cockerell, 1915 | |
| Megachile bruneri Mitchell, 1934 | |
| Megachile chelostomoides Gribodo, 1894 | |
| Megachile chomskyi Sheffield, 2013 | |
| Megachile clara Mitchell, 1930 | |
| Megachile cylindrica Friese, 1906 | |
| Megachile disparilis Cresson, 1872 | |
| Megachile disparipennis W.P.Cockerell, 1917 | |
| Megachile facunda Cresson, 1872 | |
| Megachile grandis Cresson, 1872 | |
| Megachile instita Mitchell, 1934 | |
| Megachile lucrosa Cresson, 1872 | |
| Megachile maurata Mitchell, 1936 | |
| Megachile megagyna Cockerell, 1909 | |
| Megachile melanderi Mitchell, 1944 | |
| Megachile mojavensis Mitchell, 1934 | |
| Megachile morio (Smith, 1853) | ⇒ Megachile pruina Smith, 1853 |
| Megachile nupta Cresson, 1872 | |
| Megachile optiva Cresson, 1872 | |
| Megachile osmioides Cresson, 1872 | |
| Megachile palmensis Mitchell, 1934 | |
| Megachile paratexana Mitchell, 1930 | |
| Megachile parksi Mitchell, 1936 | |
| Megachile penicillata Cockerell, 1915 | |
| Megachile perbrevis Cresson, 1878 | |
| Megachile pratti Cockerell, 1913 | |
| Megachile sayi Cresson, 1878 | |
| Megachile studiosa (Bingham, 1899) | ⇒ Megachile exilis Cresson, 1872 |
| Megachile subanograe Mitchell, 1934 | |
| Megachile sublaurita Mitchell, 1927 | |
| Megachile victoriana Mitchell, 1934 | |
| Megachile zaptlana Cresson, 1878 | |
| Osmia (Acanthosmioides) prunorum Cockerell, 1897 | |
| Osmia (Acanthosmioides) watsoni Cockerell, 1911 | |
| Osmia (Cephalosmia) subaustralis Cockerell, 1900 | |
| Osmia (Diceratosmia) botitena Cockerell, 1909 | |
| Osmia (Diceratosmia) conjuncta Cresson, 1864 | |
| Osmia (Diceratosmia) subfasciata Cresson, 1872 | |
| Osmia (Helicosmia) chalybea Smith, 1853 | Stout tagelus |
| Osmia (Helicosmia) coloradensis Cresson, 1878 | Colorado Osmia |
| Osmia (Helicosmia) georgica Cresson, 1878 | Georgia Mason |
| Osmia (Melanosmia) cerasi Cockerell, 1897 | |
| Osmia (Melanosmia) clarescens Cockerell, 1911 | |
| Osmia (Melanosmia) cordata Robertson, 1902 | |
| Osmia (Melanosmia) gaudiosa Cockerell, 1907 | |
| Osmia (Melanosmia) pumila Cresson, 1864 | Dwarf Mason Bee |
| Osmia (Melanosmia) sandhouseae Mitchell, 1927 | |
| Osmia (Melanosmia) simillima Smith, 1853 | Similar Mason Bee |
| Osmia (Melanosmia) texana Cresson, 1872 | Texas Mason Bee |
| Osmia (Melanosmia) titusi (Cockerell, 1905) | ⇒ Osmia phenax Cockerell, 1897 |
| Osmia (Nothosmia) latisulcata Michener, 1936 | |
| Osmia (Osmia) lignaria Say, 1837 | Blue orchard bee |
| Osmia (Osmia) ribifloris Cockerell, 1900 | Blueberry bee |
| Osmia ashmeadii Titus, 1904 | Long-horn caddisflies |
| Osmia bella (Cresson, 1878) | ⇒ Osmia cobaltina Cresson, 1878 |
| Osmia marilaunidii Cockerell, 1914 | |
| Stelis (Dolichostelis) costalis Cresson, 1872 | |
| Stelis (Dolichostelis) louisae Cockerell, 1911 | |
| Stelis (Dolichostelis) perpulchra Crawford, 1916 | |
| Stelis (Heterostelis) australis Cresson, 1878 | |
| Stelis (Stelidium) ashmeadiella | |
| Stelis (Stelis) anthracina Timberlake, 1941 | |
| Stelis (Stelis) diversicolor Crawford, 1916 | |
| Stelis (Stelis) lateralis Cresson, 1864 | Spot-Sided Dark Bee |
| Stelis texana Thorp, 1966 | |
| Trachusa (Heteranthidium) bequaerti Schwarz, 1926 | |
| Trachusa (Heteranthidium) cordaticeps Michener, 1949 | |
| Trachusa (Heteranthidium) larreae Cockerell, 1897 | |
| Trachusa (Heteranthidium) zebrata Cresson, 1872 | |
| Trachusa (Legnanthidium) ridingsii Cresson, 1878 | |
