| Anthophora (Clisodon) furcata Panzer, 1798 | Fork Tailed Flower Bee |
| Anthophora furcata terminalis (Cresson, 1869) | ⇒ Anthophora terminalis Cresson, 1869 |
| Anthophora (Clisodon) terminalis Cresson, 1869 | Orange-Tipped Wood-Digger Bee |
| Anthophora (Heliophila) peritomae Cockerell, 1905 | |
| Anthophora (Heliophila) phenax Cockerell, 1898 | |
| Anthophora (Heliophila) squammulosa Dours, 1869 | |
| 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 bomboides bomboides | |
| Anthophora (Melea) occidentalis Cresson, 1869 | Digger bee |
| Anthophora (Mystacanthophora) urbana Cresson, 1878 | |
| Anthophora (Pyganthophora) edwardsii Cresson, 1878 | |
| Anthophora canadensis Cresson, 1869 | |
| Anthophorula (Anthophorula) eriogoni Timberlake, 1947 | |
| Apis (Apis) mellifera Linnaeus, 1758 | African Honey Bee |
| Bombus (Alpinobombus) balteatus Dahlbom, 1832 | Baltic bumblebee |
| Bombus (Alpinobombus) hyperboreus Schönherr, 1809 | Great arctic bumblebee |
| Bombus (Alpinobombus) neoboreus (Sladen, 1919) | ⇒ Bombus strenuus Cresson, 1863 |
| Bombus (Alpinobombus) polaris Curtis, 1835 | Polar Bumble Bee |
| Bombus (Bombias) auricomus Robertson, 1903 | Black and gold bumble bee |
| Bombus (Bombias) nevadensis (Cockerell, 1937) | ⇒ Bombus auricomus Robertson, 1903 |
| Bombus (Bombus) affinis Cresson, 1863 | Rusty patch bumble bee |
| Bombus (Bombus) cryptarum Fabricius, 1775 | Cryptic Bumble Bee |
| Bombus (Bombus) lantschouensis Vogt, 1908 | |
| Bombus (Bombus) longipennis Friese, 1918 | |
| Bombus (Bombus) lucorum (Linnaeus, 1761) | ⇒ Bombus lantschouensis Vogt, 1908 |
| Bombus (Bombus) moderatus Cresson, 1863 | |
| Bombus (Bombus) nevadensis Cresson, 1874 | Nevada bumble bee |
| Bombus (Bombus) occidentalis (Greene, 1858) | ⇒ Bombus terricola Kirby, 1837 |
| Bombus (Bombus) patagiatus (Nylander, 1848) | ⇒ Bombus minshanensis Bischoff, 1936 |
| Bombus (Bombus) terrestris (Linnaeus, 1758) | ⇒ Bombus longipennis Friese, 1918 |
| Bombus (Bombus) terricola Kirby, 1837 | Yellow-banded Bumble Bee |
| Bombus (Crotchiibombus) crotchii Cresson, 1878 | Crotch bumble bee |
| Bombus (Cullumanobombus) griseocollis De Geer, 1773 | Brown-belted Bumble Bee |
| Bombus (Cullumanobombus) morrisoni Cresson, 1878 | Morrison 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 (Fervidobombus) sonorus (Say, 1837) | ⇒ Bombus pensylvanica De Geer, 1773 |
| Bombus (Fervidobombus) weisi Friese, 1903 | |
| Bombus (Fraternobombus) fraternus Smith, 1854 | Southern plains bumble bee |
| Bombus (Kallobombus) soroeensis Fabricius, 1776 | Broken-belted Bumble Bee |
| Bombus (Melanobombus) lapidarius Linnaeus, 1758 | Large Red-tailed Bumble Bee |
| Bombus (Psithyrus) ashtoni Cresson, 1864 | Ashton cuckoo bumble bee |
| Bombus (Psithyrus) bohemicus Seidl, 1837 | Ashton's Cuckoo Bumblebee |
| Bombus (Psithyrus) campestris Panzer, 1801 | Field Cuckoo 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) centralis Cresson, 1864 | Central bumble bee |
| Bombus (Pyrobombus) ephippiatus Say, 1837 | Vegetable hummingbird |
| 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) hypnorum Linnaeus, 1758 | New garden bumblebee |
| Bombus (Pyrobombus) impatiens Cresson, 1863 | Common eastern bumble bee |
| Bombus (Pyrobombus) jonellus Kirby, 1802 | Heath Bumble Bee |
| Bombus (Pyrobombus) lapponicus (Fabricius, 1793) | ⇒ Bombus monticola Smith, 1849 |
| Bombus (Pyrobombus) melanopygus Nylander, 1848 | Black tail bumble bee |
| Bombus (Pyrobombus) mixtus Cresson, 1878 | Fuzzy-horned bumble bee |
| Bombus (Pyrobombus) monticola Smith, 1849 | Bilberry Blaeberry Bumblebee |
| 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 vagans vagans Smith, 1854 | |
| 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 (Subterraneobombus) borealis Kirby, 1837 | Northern amber bumble bee |
| Bombus (Thoracobombus) brasiliensis Lepeletier, 1835 | |
| Bombus (Thoracobombus) pascuorum Scopoli, 1763 | Common carder bee |
| Bombus bolsteri (Franklin, 1913) | ⇒ Bombus vagans Smith, 1854 |
| Bombus couperi (Cresson, 1878) | ⇒ Bombus frigidus Smith, 1854 |
| Bombus edwardsii (Nylander, 1848) | ⇒ Bombus melanopygus Nylander, 1848 |
| Bombus fervidas | Golden Northern Bumble Bee |
| Bombus kirbiellus (Curtis, 1835) | ⇒ Bombus balteatus Dahlbom, 1832 |
| Bombus kluanensis Williams & C..., 2016 | |
| Bombus lacustris Cresson, 1863 | |
| Bombus natvigi (Richards, 1931) | ⇒ Bombus hyperboreus Schönherr, 1809 |
| Bombus pennsylvanicus (De Geer, 1773) | ⇒ Bombus pensylvanica De Geer, 1773 |
| Bombus pennsylvanicus pennsylvanicus | |
| Bombus pensylvanica De Geer, 1773 | |
| Bombus pleuralis Nylander, 1848 | |
| Bombus separatus Cresson, 1863 | |
| Bombus sg | |
| Bombus strenuus Cresson, 1863 | |
| Bombus vancouverensis (Cresson, 1878) | ⇒ Bombus bifarius Cresson, 1878 |
| Centris (Paracentris) rhodopus Cockerell, 1897 | Red-legged Centris |
| Centris (Wagenknechtia) cineraria Smith, 1854 | |
| 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) floridana Mitchell, 1962 | Florida Ceratina |
| Ceratina (Zadontomerus) nautlana Cockerell, 1897 | |
| Ceratina (Zadontomerus) strenua Smith, 1879 | Bunchberry dogwood |
| Ceratina metaria Cockerell, 1920 | |
| Ceratina mikmaqi Rehan & Shef..., 2011 | Mikmaq Little Carpenter Bee |
| Deltoptila elefas Friese, 1917 | |
| Diadasia (Coquillettapis) australis Cresson, 1878 | |
| Diadasia (Coquillettapis) consociata Timberlake, 1939 | |
| Diadasia (Coquillettapis) diminuta Cresson, 1878 | |
| Diadasia (Coquillettapis) rinconis Cockerell, 1897 | |
| Diadasia (Diadasia) enavata Cresson, 1872 | Sunflower Chimney Bee |
| Doeringiella cressoni | |
| Doeringiella helanthi | |
| Doeringiella lunaris | |
| Doeringiella pectoralis | |
| Elaphropoda bembidion Lieftinck, 1966 | Cascade cave amphipod |
| Epeoloides pilosula (Cresson, 1878) | ⇒ Epeoloides pilosulus Cresson, 1878 |
| Epeoloides pilosulus Cresson, 1878 | |
| Epeolus ainsliei Crawford, 1932 | |
| Epeolus americanus Cresson, 1878 | |
| Epeolus australis Mitchell, 1962 | |
| Epeolus autumnalis Robertson, 1902 | Autumnal Cellophane-Cuckoo |
| Epeolus bifasciatus Cresson, 1864 | Two-Banded Cellophane-Cuckoo |
| Epeolus canadensis Mitchell, 1962 | Canadian Cellophane-Cuckoo Bee |
| Epeolus compactus Cresson, 1878 | |
| Epeolus gibbsi Onuferko, 2018 | |
| Epeolus lectoides Robertson, 1901 | Knotted clover |
| Epeolus minimus Robertson, 1902 | Least Cellophane-Cuckoo Bee |
| Epeolus olympiellus Cockerell, 1904 | |
| Epeolus pusillus Cresson, 1864 | Dwarf Cellophane-Cuckoo Bee |
| Epeolus scutellaris Say, 1824 | Notch-Backed Cellophane-Cuckoo Bee |
| Epeolus tristicolor Viereck, 1905 | Twining screwstem |
| Eucera (Synhalonia) atriventris Smith, 1854 | |
| Eucera (Synhalonia) douglasiana Cockerell, 1906 | |
| Eucera (Synhalonia) frater Cresson, 1878 | Monk Longhorn Bee |
| Eucera (Synhalonia) fulvitarsis Cresson, 1878 | |
| Eucera (Synhalonia) hamata Bradley, 1942 | |
| Habropoda cineraria Smith, 1879 | |
| Habropoda cressonii Dalla Torre, 1896 | |
| Habropoda laboriosa Fabricius, 1804 | Blueberry Habropoda |
| Habropoda miserabilis Cresson, 1878 | |
| Holcopasites calliopsidis Linsley, 1943 | Calliopsis Cuckoo Nomad Bee |
| Holcopasites heliopsis Robertson, 1897 | |
| Melecta (Melecta) pacifica Cresson, 1878 | |
| Melecta thoracica Cresson, 1875 | |
| Melissodes (Apomelissodes) apicata Lovell & Coc..., 1906 | |
| Melissodes (Callimelissodes) lupina Cresson, 1878 | |
| Melissodes (Eumelissodes) agilis Cresson, 1878 | Agile Long-horned Bee |
| Melissodes (Eumelissodes) bidentis Cockerell, 1914 | |
| Melissodes (Eumelissodes) bimatris LaBerge, 1961 | |
| Melissodes (Eumelissodes) boltoniae Robertson, 1905 | Subterranean clover |
| Melissodes (Eumelissodes) confusa Cresson, 1878 | |
| Melissodes (Eumelissodes) coreopsis Robertson, 1905 | Subterranean clover |
| Melissodes (Eumelissodes) denticulata Smith, 1854 | |
| Melissodes (Eumelissodes) dentiventris Smith, 1854 | |
| Melissodes (Eumelissodes) druriella Kirby, 1802 | |
| Melissodes (Eumelissodes) grindeliae Cockerell, 1898 | |
| Melissodes (Eumelissodes) illata Lovell & Coc..., 1906 | |
| Melissodes (Eumelissodes) lutulenta LaBerge, 1961 | |
| Melissodes (Eumelissodes) menuachus Cresson, 1868 | |
| Melissodes (Eumelissodes) microsticta Cockerell, 1905 | |
| Melissodes (Eumelissodes) nivea Robertson, 1895 | |
| Melissodes (Eumelissodes) pallidisignata Cockerell, 1905 | |
| Melissodes (Eumelissodes) perlusa Cockerell, 1925 | |
| Melissodes (Eumelissodes) robustior Cockerell, 1915 | Robust Long-horned Bee |
| Melissodes (Eumelissodes) snowii Cresson, 1878 | |
| Melissodes (Eumelissodes) subagilis Cockerell, 1905 | |
| Melissodes (Eumelissodes) subillata LaBerge, 1961 | |
| Melissodes (Eumelissodes) trinodis Robertson, 1901 | Dark-Veined Longhorn |
| Melissodes (Eumelissodes) verbesinarum Cockerell, 1905 | |
| Melissodes (Eumelissodes) vernoniae Robertson, 1902 | |
| Melissodes (Heliomelissodes) desponsa Smith, 1854 | Thistle Long-horned Bee |
| Melissodes (Heliomelissodes) rivalis Cresson, 1872 | |
| Melissodes (Melissodes) bimaculata Lepeletier, 1825 | Longhorn Bee |
| Melissodes bimaculata bimaculata Lepeletier, 1825 | |
| Melissodes communis alopex Cockerell, 1928 | |
| Melissodes communis communis Cresson, 1878 | |
| Melissodes rustica (Say, 1837) | ⇒ Melissodes druriella Kirby, 1802 |
| Melissodes saponellus Cockerell, 1908 | |
| Nannotrigona mellaria Smith, 1862 | Cut-off cleftclam |
| Neolarra verbesinae Cockerell, 1895 | |
| Neolarra vigilans Cockerell, 1895 | |
| Neopasites fulviventris Cresson, 1878 | |
| Nomada (Gnathias) bella Cresson, 1863 | Belle Nomad Bee |
| Nomada bella bella Cresson, 1863 | |
| Nomada (Nomada) banksi Cockerell, 1907 | Banks' Nomad Bee |
| Nomada (Nomada) ceanothi Cockerell, 1907 | |
| Nomada (Nomada) denticulata Robertson, 1902 | Denticulate Nomad |
| Nomada (Nomada) gracilis Cresson, 1863 | Slender Cuckoo Nomad Bee |
| Nomada (Nomada) parva Robertson, 1900 | Small Cuckoo Nomad Bee |
| Nomada (Nomada) sulphurata Smith, 1854 | |
| Nomada (Nomada) vicina Cresson, 1863 | Neighborly Nomad |
| Nomada (Nomadula) ruficornis Linnaeus, 1758 | Fork-Jawed Nomad |
| Nomada aquilarum Cockerell, 1903 | |
| Nomada armatella Cockerell, 1903 | Armed Cuckoo Nomad Bee |
| Nomada articulata Smith, 1854 | Articulated Nomad |
| Nomada australis Mitchell, 1962 | Austral Cuckoo Nomad Bee |
| Nomada bethunei Cockerell, 1903 | Bethune'S Cuckoo Nomad Bee |
| Nomada bishoppi Cockerell, 1911 | |
| Nomada capitalis Mitchell, 1962 | |
| Nomada costalis Brèthes, 1909 | |
| Nomada cressoni | |
| Nomada cressonii Morawitz, 1877 | Cresson'S Nomad |
| Nomada cressonii cressonii Robertson, 1893 | |
| Nomada crotchii Cresson, 1878 | |
| Nomada cuneata Robertson, 1903 | Cuneate Cuckoo Nomad Bee |
| Nomada dentariae Robertson, 1903 | |
| Nomada depressa Cresson, 1863 | Depressed Cuckoo Nomad Bee |
| Nomada dreisbachi Mitchell, 1962 | |
| Nomada fervida Smith, 1854 | |
| Nomada heiligbrodtii (Cresson, 1878) | ⇒ Nomada texana Cresson, 1872 |
| Nomada hydrophylli Swenk, 1915 | |
| Nomada illinoensis (Robertson, 1900) | ⇒ Nomada illinoiensis Robertson, 1900 |
| Nomada illinoiensis Robertson, 1900 | |
| Nomada imbricata Smith, 1854 | Imbricate Cuckoo Nomad Bee |
| Nomada inepta (Mitchell, 1962) | ⇒ Nomada gracilis Cresson, 1863 |
| 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 obliterata Cresson, 1863 | Obliterated Cuckoo Nomad Bee |
| Nomada ovata Robertson, 1903 | Orange-Tailed Nomad |
| Nomada packardiella Cockerell, 1906 | |
| Nomada panzeri Lepeletier, 1841 | Panzer's nomad bee |
| Nomada perplexa Cresson, 1863 | |
| Nomada pseudops (Cockerell, 1905) | ⇒ Nomada bethunei Cockerell, 1903 |
| Nomada psilocera Kohl, 1908 | |
| Nomada pygmaea Cresson, 1863 | Pygmy Cuckoo Nomad Bee |
| Nomada sayi Robertson, 1893 | |
| Nomada scita Cresson, 1878 | |
| Nomada snowii Cresson, 1878 | |
| Nomada sobrina Mitchell, 1962 | |
| Nomada subrutila Lovell & Coc..., 1905 | |
| Nomada texana Cresson, 1872 | Texas Nomad Bee |
| Nomada valida Smith, 1854 | True Cuckoo Nomad Bee |
| Nomada vincta Say, 1837 | Bounded Cuckoo Nomad Bee |
| Nomada wisconsinensis (Graenicher, 1911) | ⇒ Nomada fervida Smith, 1854 |
| Nomada xanthura Cockerell, 1908 | Yellow-Striped Cuckoo Nomad Bee |
| Peponapis (Peponapis) pruinosa Say, 1837 | Eastern cucurbit bee |
| Peponapis pruinosa pruinosa | |
| Phileremulus mallochi | |
| Psithyrus ashtoni (Cresson, 1864) | ⇒ Bombus ashtoni Cresson, 1864 |
| Psithyrus citrinus (Smith, 1854) | ⇒ Bombus citrinus Smith, 1854 |
| Psithyrus insularis Smith, 1861 | |
| Thyreus brachyaspis Cockerell, 1936 | |
| Thyreus sphenophorus Lieftinck, 1962 | |
| Triepeolus balteatus Cockerell, 1921 | |
| Triepeolus brittaini Cockerell, 1931 | |
| Triepeolus concavus (Cresson, 1878) | ⇒ Doeringiella concava |
| Triepeolus dacotensis Stevens, 1919 | |
| Triepeolus donatus Smith, 1854 | Thistle Longhorn-Cuckoo |
| Triepeolus eliseae Rightmyer, 2017 | |
| Triepeolus lunatus Say, 1824 | |
| Triepeolus paenepectoralis Viereck, 1905 | Twining screwstem |
| Triepeolus pectoralis Robertson, 1897 | Goldenrod Longhorn-Cuckoo Bee |
| Triepeolus simplex Robertson, 1903 | Simple Longhorn-Cuckoo |
| Triepeolus subalpinus Cockerell, 1910 | |
| Triepeolus timberlakei Cockerell, 1929 | |
| Xeromelecta (Melectomorpha) californica Cresson, 1878 | California Xeromelecta |
| Xylocopa (Neoxylocopa) brasilianorum Linnaeus, 1767 | Arnold's dogwood |
| Xylocopa (Neoxylocopa) sonorina Smith, 1874 | Sonoran carpenter bee |
| Xylocopa tabaniformis sylvicola O´Brien & Hurd, 1965 | |
| Xylocopa (Xylocopoides) californica Cresson, 1864 | California carpenter bee |
| Xylocopa californica diamesa Hurd, 1954 | |
| Xylocopa (Xylocopoides) virginica Linnaeus, 1771 | Carpenter bee |
| Xylocopa virginica virginica Linnaeus, 1771 | Virginia Carpenter Bee |
