| Anthophora (Clisodon) furcata Panzer, 1798 | Fork Tailed Flower Bee |
| Anthophora (Clisodon) terminalis Cresson, 1869 | Orange-Tipped Wood-Digger Bee |
| Anthophora (Heliophila) albata Cresson, 1876 | |
| Anthophora (Heliophila) exigua Cresson, 1879 | |
| Anthophora (Lophanthophora) neglecta Timberlake &..., 1936 | |
| Anthophora (Lophanthophora) pacifica Cresson, 1878 | |
| Anthophora (Lophanthophora) porterae Cockerell, 1900 | |
| Anthophora (Lophanthophora) ursina Cresson, 1869 | |
| Anthophora (Melea) abrupta Say, 1837 | Vegetable hummingbird |
| Anthophora (Melea) bomboides Kirby, 1837 | Bumble-bee-mimic Anthophora |
| Anthophora (Melea) occidentalis Cresson, 1869 | Digger bee |
| Anthophora (Mystacanthophora) urbana Cresson, 1878 | |
| Anthophora (Pyganthophora) crotchii Cresson, 1878 | Crotch´s Anthophora |
| Anthophora (Pyganthophora) edwardsii Cresson, 1878 | |
| Anthophora flexipes Cresson, 1879 | |
| Anthophora villosula (Smith, 1854) | ⇒ Colletes hederae Schmidt & We..., 1993 |
| Apis (Apis) mellifera Linnaeus, 1758 | Drone-Bee |
| Bombus (Alpinobombus) balteatus Dahlbom, 1832 | Baltic bumblebee |
| Bombus (Alpinobombus) polaris Curtis, 1835 | Polar Bumble Bee |
| Bombus (Bombias) auricomus Robertson, 1903 | Black and gold bumble bee |
| Bombus (Bombus) affinis Cresson, 1863 | Rusty patch bumble bee |
| Bombus (Bombus) nevadensis Cresson, 1874 | Nevada bumble bee |
| Bombus (Bombus) occidentalis (Greene, 1858) | ⇒ Bombus terricola Kirby, 1837 |
| Bombus (Bombus) terricola Kirby, 1837 | Yellow-banded Bumble Bee |
| Bombus (Cullumanobombus) rufocinctus Cresson, 1863 | Red-belted Bumble Bee |
| Bombus (Fervidobombus) californicus (Smith, 1854) | ⇒ Bombus fervidus Fabricius, 1798 |
| Bombus (Fervidobombus) fervidus Fabricius, 1798 | Golden Northern Bumble Bee |
| Bombus (Fervidobombus) pensylvanicus De Geer, 1773 | American bumble bee |
| Bombus (Fraternobombus) fraternus Smith, 1854 | Southern plains bumble bee |
| Bombus (Psithyrus) ashtoni Cresson, 1864 | Ashton cuckoo bumble bee |
| Bombus (Psithyrus) citrinus Smith, 1854 | Lemon cuckoo bumble bee |
| Bombus (Psithyrus) fernaldae (Franklin, 1911) | ⇒ Bombus flavidus Eversmann, 1852 |
| Bombus (Psithyrus) flavidus Eversmann, 1852 | Fernald Cuckoo Bumble Bee |
| Bombus (Psithyrus) insularis (Smith, 1861) | ⇒ Bombus hypnorum Linnaeus, 1758 |
| Bombus (Psithyrus) suckleyi Greene, 1860 | Suckley Cuckoo Bumble Bee |
| Bombus (Pyrobombus) bifarius Cresson, 1878 | Black-notched Bumble Bee |
| Bombus (Pyrobombus) bimaculatus Cresson, 1863 | Two-spotted Bumble Bee |
| Bombus (Pyrobombus) caliginosus Frison, 1927 | Fog-belt Bumble Bee |
| Bombus (Pyrobombus) centralis Cresson, 1864 | Central bumble bee |
| Bombus (Pyrobombus) flavifrons Cresson, 1863 | Yellow head bumble bee |
| Bombus (Pyrobombus) frigidus Smith, 1854 | Frigid Bumble Bee |
| Bombus (Pyrobombus) huntii Greene, 1860 | Hunt bumble bee |
| Bombus (Pyrobombus) impatiens Cresson, 1863 | Common eastern bumble bee |
| Bombus (Pyrobombus) melanopygus Nylander, 1848 | Black tail bumble bee |
| Bombus (Pyrobombus) mixtus Cresson, 1878 | Fuzzy-horned bumble bee |
| Bombus (Pyrobombus) perplexus (Cresson, 1863) | ⇒ Bombus soroeensis Fabricius, 1776 |
| Bombus (Pyrobombus) sandersoni Franklin, 1913 | Sanderson bumble bee |
| Bombus (Pyrobombus) sitkensis Nylander, 1848 | Sitka bumble bee |
| Bombus (Pyrobombus) sylvicola Kirby, 1837 | Forest bumble bee |
| Bombus (Pyrobombus) ternarius Say, 1837 | Orange-belted Bumble Bee |
| Bombus (Pyrobombus) vagans Smith, 1854 | Half-black bumble bee |
| Bombus (Pyrobombus) vandykei Frison, 1927 | Van Dyke bumble bee |
| Bombus (Pyrobombus) vosnesenskii Radoszkowski, 1862 | Vosnesensky bumble bee |
| Bombus (Separatobombus) griseocollis (DeGeer, 1773) | ⇒ Bombus griseocollis De Geer, 1773 |
| Bombus (Separatobombus) morrisoni (Cresson, 1878) | ⇒ Bombus morrisoni Cresson, 1878 |
| Bombus (Subterraneobombus) appositus Cresson, 1878 | Mountain Bumble Bee |
| Bombus edwardsii (Nylander, 1848) | ⇒ Bombus melanopygus Nylander, 1848 |
| Bombus fervidas | Golden Northern Bumble Bee |
| Bombus kirbiellus (Curtis, 1835) | ⇒ Bombus balteatus Dahlbom, 1832 |
| Bombus pennsylvanicus (De Geer, 1773) | ⇒ Bombus pensylvanica De Geer, 1773 |
| Bombus proavus ♰ T. D. A. Coc..., 1931 | |
| Bombus sg | |
| Centris (Wagenknechtia) cineraria Smith, 1854 | |
| Ceratina (Euceratina) callosa Fabricius, 1794 | |
| Ceratina (Zadontomerus) acantha Provancher, 1895 | Prickly Ceratina |
| Ceratina (Zadontomerus) calcarata Robertson, 1900 | Spurred Carpenter Bee |
| Ceratina (Zadontomerus) dupla (Say, 1837) | ⇒ Ceratina floridana Mitchell, 1962 |
| Ceratina (Zadontomerus) nanula Cockerell, 1897 | Dwarf Ceratina |
| Ceratina (Zadontomerus) pacifica H. S. Smith, 1907 | |
| Ceratina (Zadontomerus) strenua Smith, 1879 | Bunchberry dogwood |
| Ceratina mikmaqi Rehan & Shef..., 2011 | Mikmaq Little Carpenter Bee |
| Ceratina submaritima | |
| Diadasia (Coquillettapis) afflicta Cresson, 1878 | |
| Diadasia (Coquillettapis) australis Cresson, 1878 | |
| Diadasia (Coquillettapis) diminuta Cresson, 1878 | |
| Diadasia (Coquillettapis) nigrifrons Cresson, 1878 | |
| Diadasia (Diadasia) enavata Cresson, 1872 | Sunflower Chimney Bee |
| Elaphropoda bembidion Lieftinck, 1966 | Cascade cave amphipod |
| Epeolus argyreus | |
| Epeolus bihamatus | |
| Epeolus compactus Cresson, 1878 | |
| Epeolus humillimus Cockerell, 1918 | |
| Epeolus minimus Robertson, 1902 | Least Cellophane-Cuckoo Bee |
| Epeolus olympiellus Cockerell, 1904 | |
| Eucera (Synhalonia) actuosa Cresson, 1878 | |
| Eucera (Synhalonia) amsinckiae Timberlake, 1969 | |
| Eucera (Synhalonia) angustifrons Timberlake, 1969 | |
| Eucera (Synhalonia) atriventris Smith, 1854 | |
| Eucera (Synhalonia) edwardsii Cresson, 1878 | |
| Eucera (Synhalonia) frater Cresson, 1878 | Monk Longhorn Bee |
| Eucera (Synhalonia) fulvitarsis Cresson, 1878 | |
| Eucera (Synhalonia) speciosa Cresson, 1878 | |
| Eucera delphinii Timberlake, 1969 | |
| Exomalopsis hurdi Timberlake, 1980 | |
| Florilegus (Florilegus) condignus Cresson, 1878 | |
| Habropoda depressa Fowler, 1899 | |
| Habropoda laboriosa Fabricius, 1804 | Blueberry Habropoda |
| Habropoda miserabilis Cresson, 1878 | |
| Habropoda morrisoni Cresson, 1878 | |
| Holcopasites pratti | |
| Melecta (Melecta) pacifica Cresson, 1878 | |
| Melecta (Melecta) separata Cresson, 1879 | |
| Melecta thoracica Cresson, 1875 | |
| Melissodes (Apomelissodes) apicata Lovell & Coc..., 1906 | |
| Melissodes (Callimelissodes) lupina Cresson, 1878 | |
| Melissodes (Callimelissodes) stearnsi Cockerell, 1905 | |
| Melissodes (Eumelissodes) agilis Cresson, 1878 | Agile Long-horned Bee |
| Melissodes (Eumelissodes) denticulata Smith, 1854 | |
| Melissodes (Eumelissodes) dentiventris Smith, 1854 | |
| Melissodes (Eumelissodes) druriella Kirby, 1802 | |
| Melissodes (Eumelissodes) menuachus Cresson, 1868 | |
| Melissodes (Eumelissodes) microsticta Cockerell, 1905 | |
| Melissodes (Eumelissodes) nivea Robertson, 1895 | |
| Melissodes (Eumelissodes) pallidisignata Cockerell, 1905 | |
| Melissodes (Eumelissodes) paulula LaBerge, 1961 | |
| Melissodes (Eumelissodes) robustior Cockerell, 1915 | Robust Long-horned Bee |
| Melissodes (Eumelissodes) semilupina Cockerell, 1905 | |
| Melissodes (Eumelissodes) subillata LaBerge, 1961 | |
| Melissodes (Eumelissodes) trinodis Robertson, 1901 | Dark-Veined Longhorn |
| Melissodes (Eumelissodes) utahensis LaBerge, 1961 | |
| Melissodes (Heliomelissodes) desponsa Smith, 1854 | Thistle Long-horned Bee |
| Melissodes (Heliomelissodes) rivalis Cresson, 1872 | |
| Melissodes (Melissodes) bimaculata Lepeletier, 1825 | Longhorn Bee |
| Melissodes (Melissodes) communis Cresson, 1878 | Common Long-horned Bee |
| Melitoma taurea Say, 1837 | |
| Neopasites punctulatus | |
| Nomada (Nomada) denticulata Robertson, 1902 | Denticulate Nomad |
| Nomada (Nomada) fragariae Mitchell, 1962 | |
| Nomada (Nomada) sulphurata Smith, 1854 | |
| Nomada (Nomadita) placida Cresson, 1863 | |
| Nomada argentea Schwarz, 1966 | |
| Nomada armatella Cockerell, 1903 | Armed Cuckoo Nomad Bee |
| Nomada articulata Smith, 1854 | Articulated Nomad |
| Nomada australis Mitchell, 1962 | Austral Cuckoo Nomad Bee |
| Nomada collinsiana Cockerell, 1905 | |
| Nomada cressonii Morawitz, 1877 | Cresson'S Nomad |
| Nomada crotchii Cresson, 1878 | |
| Nomada depressa Cresson, 1863 | Depressed Cuckoo Nomad Bee |
| Nomada dreisbachi Mitchell, 1962 | |
| Nomada edwardsii Cresson, 1878 | Edwards´ Nomad Bee |
| Nomada erythrochroa Cresson, 1903 | |
| Nomada florilega Lovell & Coc..., 1905 | Flower Cuckoo Nomad Bee |
| Nomada hesperia Cockerell, 1903 | |
| Nomada illinoensis (Robertson, 1900) | ⇒ Nomada illinoiensis Robertson, 1900 |
| Nomada imbricata Smith, 1854 | Imbricate Cuckoo Nomad Bee |
| Nomada jennei Cockerell, 1906 | |
| Nomada kincaidiana Cockerell, 1903 | |
| Nomada lehighensis Cockerell, 1903 | Lehigh Gap Cuckoo Nomad Bee |
| Nomada lepida Cresson, 1863 | Charming Cuckoo Nomad Bee |
| Nomada louisianae Cockerell, 1903 | |
| Nomada luteola Olivier, 1811 | Littleleaf mockorange |
| Nomada luteoloides (Robertson, 1895) | ⇒ Nomada sulphurata Smith, 1854 |
| Nomada maculata Cresson, 1863 | Spotted Nomad Bee |
| Nomada malonella Cockerell, 1910 | |
| Nomada malonina Cockerell, 1910 | |
| Nomada mutans Cockerell, 1910 | |
| Nomada obliterata Cresson, 1863 | Obliterated Cuckoo Nomad Bee |
| Nomada ovata Robertson, 1903 | Orange-Tailed Nomad |
| Nomada packardiella Cockerell, 1906 | |
| Nomada pascoensis Cockerell, 1903 | |
| Nomada perplexa Cresson, 1863 | |
| Nomada perplexans Cockerell, 1910 | |
| Nomada pygmaea Cresson, 1863 | Pygmy Cuckoo Nomad Bee |
| Nomada sayi Robertson, 1893 | |
| Nomada scita Cresson, 1878 | |
| Nomada semisuavis Cockerell, 1910 | |
| Nomada suavis Cresson, 1878 | |
| Nomada ulsterensis Mitchell, 1962 | |
| Nomada washingtoni Cockerell, 1903 | |
| Peponapis (Peponapis) pruinosa Say, 1837 | Eastern cucurbit bee |
| Ptilothrix bombiformis Cresson, 1878 | Hibiscus Bee |
| Svastra (Brachymelissodes) cressonii Dalla Torre, 1896 | |
| Svastra (Epimelissodes) obliqua Say, 1837 | Oblique Longhorn |
| Triepeolus donatus Smith, 1854 | Thistle Longhorn-Cuckoo |
| Triepeolus grindeliae Cockerell, 1907 | |
| Triepeolus helianthi Robertson, 1897 | Sunflower Cuckoo Nomad Bee |
| Triepeolus paenepectoralis Viereck, 1905 | Twining screwstem |
| Triepeolus pectoralis Robertson, 1897 | Goldenrod Longhorn-Cuckoo Bee |
| Triepeolus texanus Cresson, 1878 | |
| Triepeolus timberlakei Cockerell, 1929 | |
| Xylocopa californica diamesa Hurd, 1954 | |
| Xylocopa (Xylocopoides) virginica Linnaeus, 1771 | Carpenter bee |
