[Andrena candida race tramoserica Viereck, 1917, Andrena chlorinella Viereck, 1904, Andrena subcandida Viereck, 1904, Andrena xanthostigma Viereck, 1904]

[Andrena mimetica Cockerell, 1903, Andrena yumorum Viereck, 1917]

[Andrena bebbiana Viereck & Cockerell, 1914, Andrena bella Viereck, 1924, Andrena cockerelli Graenicher, 1903, Andrena diversicolor Viereck, 1924, Andrena hirtignatha Linsley, 1951, Andrena moesta Smith, 1879, Andrena nodosa Viereck, 1924, Andrena pallida Viereck, 1924, Andrena rhodotricha Linsley, 1939, Andrena stenosoma Viereck, 1925, Andrena subarctica Cockerell, 1936, Andrena variantia Linsley, 1951, Cilissa albihirta Ashmead, 1890]

[Andrena placitae Cockerell, 1903, Andrena salicinella Cockerell, 1895, Andrena vegana Viereck and Cockerell, 1914]

[Andrena hitei Cockerell, 1907, Andrena jacobaea Cockerell, 1915]

[Andrena electrica Casad and Cockerell, 1896]

[Andrena colletoides Viereck and Cockerell, 1914, Andrena townsendi Viereck and Cockerell, 1914]

[Panurgus pectidis Cockerell, 1897]

[Andrena arizonensis Viereck and Cockerell, 1914, Andrena kincaidii Cockerell, 1897, Andrena pascoensis Cockerell, 1897, Andrena prunorum gillettei Cockerell, 1898, Andrena prunorum mariformis Cockerell, 1916, Andrena prunorum pauperatula Cockerell, 1938, Andrena prunorum sinaloa Viereck, 1926, Andrena shasta Viereck, 1926, Andrena sinaloa Viereck, 1926, Andrena vernoni Viereck, 1904]

[Andrena aureocincta Cockerell, 1896]

[Andrena brevibasis Cockerell, 1931, Andrena dolichotricha Cockerell, 1924, Andrena marioides Viereck, 1917, Andrena politissima Cockerell, 1918, Andrena postnitens Cockerell, 1931, Andrena trachandrenoides Viereck, 1904]

[Calliopsis euphorbiae (Cockerell, 1925), Nomadopsis euphorbiae (Cockerell, 1925), Nomadopsis helianthi (Swenk and Cockerell, 1907), Spinoliella euphorbiae Cockerell, 1925, Spinoliella helianthi Swenk and Cockerell, 1907]

[Calliopsis semirufus Cockerell, 1896, Calliopsis subalpinus Cockerell, 1894, Hypomacrotera andradensis Cockerell, 1937]

[Perdita haplura Cockerell, 1922]

[Perdita latior Cockerell, 1896]

[Perdita mellea Timberlake, 1954]

[Perdita portalis Timberlake, 1954]

[Perdita laticeps Cockerell, 1896]

[Perdita callicerata chrysoceras Cockerell, 1897, Perdita lutzi Cockerell, 1922]

[Perdita nolinae Cockerell, 1922]

[Perdita crawfordi Cockerell, 1901, Perdita ignota basalis Timberlake, 1958, Perdita ignota crawfordi Cockerell, 1901, Perdita ignota isopappi Timberlake, 1928, Perdita ignota jaliscana Timberlake, 1958, Perdita isopappi Timberlake, 1928]

[Perdita pallidior Cockerell, 1896, Perdita pulchrior Cockerell, 1896]

[Perdita pellucida Cockerell, 1896, Perdita sphaeralceae alticola Cockerell, 1896, Perdita sphaeralceae balteata Timberlake, 1964, Perdita sphaeralceae notata Timberlake, 1964, Perdita sphaeralceae race alticola Cockerell, 1896, Perdita sphaeralceae ridens Cockerell, 1922]

[Perdita verbesinae maculata Cockerell, 1896, Perdita verbesinae mut cyanella Cockerell, 1896, Perdita verbesinae nigrior Cockerell, 1896]

[Psaenythia bancrofti (Dunning, 1897), Pseudopanurgus bradleyi Timberlake, 1973]

[Andrena asclepiadis Cockerell, 1896, Andrena mexicanorum Cockerell, 1896]

[Andrena trifoliata Cockerell, 1896, Psaenythia trifoliata (Cockerell, 1896)]

[Psaenythia verbesinae Timberlake, 1955]

[Oxaea tristis Gribodo, 1894, Protoxaea gloriosa pallida Cockerell, 1934]

[Panurgus aethiops Cresson, 1872, Protandrenopsis fuscipennis Crawford, 1903]

[Calliopsis atricornis Cresson, 1878]

[Calliopsis bakeri Cockerell, 1896]

[Panurginus barberi Cockerell, 1899]

[Calliopsis boylei Cockerell, 1896]

[Heterosarus durangoensis Timberlake, 1975]

[Calliopsis fraterculus Cockerell, 1896, Pseudopanurgus timberlakei Cockerell, 1931]

[Panurginus neomexicanus Cockerell, 1898, Panurginus nigrinus Viereck, 1903]

[Pseudopanurgus occidus Timberlake, 1967]

[Panurginus pectiphilus Cockerell, 1913]

[Anthophora californica albomarginata Timberlake, 1937, Anthophora californica texana Cresson, 1872, Anthophora erysimi Cockerell, 1937, Anthophora quinquefasciata Provancher, 1895, Anthophora tarsata Dours, 1869, Anthophora tarsata subtarsata Cockerell, 1904, Anthophora texana Cresson, 1872]

[Anthophora curta ensenadensis Cockerell, 1941, Anthophora curta melanops Cockerell, 1926, Anthophora curta var. ensenadensis Cockerell, 1941, Anthophora curta var. melanops Cockerell, 1926]

[Anthophora histrio Dours, 1870, Anthophora peleni Cockerell, 1949, Anthophora popenoei Cockerell, 1949]

[Anthophora smithii Cresson, 1869]

[Anthophora corvicolor Cockerell, 1905, Anthophora ignava Cresson, 1879, Anthophora pernicis Timberlake, 1951, Anthophora subignava Cockerell, 1929]

[Anthophora curta petrophila Cockerell, 1905]

[Anthophora catalinae Cockerell, 1901, Anthophora catalinae clementina Cockerell, 1939, Anthophora leucostomella Cockerell, 1923, Anthophora nebracensis Swenk, 1909, Anthophora nicolai Cockerell, 1939, Anthophora urbana clementina Cockerell, 1939, Anthophora urbana nicolai Cockerell, 1939, Podalirius alamosanus Cockerell, 1896]

[Apis adansonii Latreille, 1804, Apis australis Keisenwetter, 1860, Apis cerifera Scopoli, 1770, Apis daurica Fischer de Waldheim, 1843, Apis gregaria Geoffroy, 1762, Apis intermissa Maa, 1953, Apis liguria Dalla Torre, 1896, Apis mellifera adami Ruttner, 1975, Apis mellifera adansoni Latreille, 1804, Apis mellifera adansonii Latreille, 1804, Apis mellifera anatoliaca Maa, 1953, Apis mellifera armeniaca Skorikov, 1929, Apis mellifera artemisia Engel, 1999, Apis mellifera capensis Eschscholtz, 1822, Apis mellifera carnica Pollmann, 1879, Apis mellifera carniolica Koschevnikov, 1900, Apis mellifera carpatica Barac, 1977, Apis mellifera caucasica Gorbachev, 1916, Apis mellifera cecropia Kiesenwetter, 1860, Apis mellifera cypria Pollmann, 1879, Apis mellifera iberiensis Engel, 1999, Apis mellifera intermissa Maa, 1953, Apis mellifera jemenitica Ruttner, 1976, Apis mellifera lamarckii Cockerell, 1906, Apis mellifera ligustica Spinola, 1806, Apis mellifera litorea FG Smith, 1961, Apis mellifera macedonica Ruttner, 1988 Apis Skorikov, Apis mellifera major Ruttner, 1976, Apis mellifera meda Skorikov, 1929, Apis mellifera monticola FG Smith, 1961, Apis mellifera nubica Ruttner, 1976, Apis mellifera remipes Gerstäcker, 1862, Apis mellifera ruttneri Sheppard, Arias, Apis mellifera sahariensis Baldensperger, 1932, Apis mellifera scutellata Lepeletier, 1836, Apis mellifera siciliana Grassi, 1881, Apis mellifera simensis Meixner, Leta, Apis mellifera sossimai Engel, 1999, Apis mellifera syriaca Skorikov, 1929, Apis mellifera taurica Alpatov, 1935, Apis mellifera unicolor Latreille, 1804, Apis mellifica Linnaeus, 1761, Apis nigritarum Lepeletier, 1836, Apis siciliana Dalla Torre, 1896]

[Bombus andamanus Gribodo, 1882]

[Apis alata Fabricius, 1798, Apis feruida Fabricius, 1798, Apis fervida Fabricius, 1798, Bombus consanguineus Handlirsch, 1888, Bombus dumoucheli Radoszkowski, 1884, Bombus elatus Fabricius, 1804, Bombus fervidus dorsalis Cresson, 1879, Bombus fervidus umbraticollis Friese, 1931, Bombus nevadensis race aztecus Cockerell, 1899, Bombus sonomae Howard, 1902]

[Bombus rufosuffusus Cockerell, 1905]

[Psithyrus bicolor Franklin, 1913, Psithyrus consultus Franklin, 1913, Psithyrus crawfordi Franklin, 1913, Psithyrus insularis (Smith, 1861)]

[Bombus morrisoni umbrosus Friese, 1931]

[Apis americanorum Fabricius, 1775, Apis antiguensis Fabricius, 1775, Apis pensylvanica De Geer, 1773, Bombus pallidus Cresson, 1863, Bombus pennsylvanicus (De Geer, 1773), Bombus titusi Ashmead, 1902, Psithyrus cevalliae Cockerell, 1899]

[Bombus sonorus flavodorsalis Franklin, 1913]

[Apathus variabilis Cresson, 1872, Bombus intrudens (Smith, 1861), Psithyrus guatemalensis Cockerell, 1912, Psithyrus mysticus Frison, 1925, Psithyrus sololensis Franklin, 1913, Psithyrus variabilis (Cresson, 1872)]

[Melecta californica Cresson, 1878, Melecta miranda Fox, 1893, Melecta sladeni Viereck, 1924, Xeromelecta californica (Cresson, 1878)]

[Centris foxi Friese, 1901, Centris limbata Friese, 1899]

[Centris marginata Fox, 1899, Centris morsei Cockerell, 1897]

[Centris caesalpiniae rhodopus Cockerell, 1897, Centris rhodoleuca Cockerell, 1923, Centris rhodopus pulchrior Cockerell, 1900]

[Ceratina submaritima Cockerell, 1897]

[Ceratina nanula rigdenae Michener, 1936]

[Melissodes apacha Cresson, 1878, Melissodes diminuta Cresson, 1878]

[Eucera arctos Dalla Torre, 1896, Melissodes densa Cresson, 1872, Melissodes enavata Cresson, 1872, Melissodes ursina Cresson, 1872]

[Diadasia lutzi deserticola Timberlake, 1940, Diadasia lutzi difficilis Timberlake, 1940]

[Diadasia vestita Timberlake, 1956]

[Dasiapis ochracea Cockerell, 1903, Diadasia blaisdelli Cockerell, 1924, Diadasia olivacea sensu auct, in part]

[Melissodes olivacea Cresson, 1878]

[Diadasia australis mimetica Cockerell, 1924, Diadasia rinconis mimetica Cockerell, 1924]

[Epeolus crucis Cockerell, 1904, Epeolus geminatus Cockerell and Sandhouse, 1924, Epeolus hitei Cockerell, 1908, Triepeolus gabrielis Cockerell, 1910]

[Epeolus mesillae palmarum Linsley, 1939]

[Ericrocis arizonensis Baker, 1906, Ericrocis melectoides Baker, 1906, Ericrocis rossi Linsley, 1939, Ericrocis rugosa Fox, 1893]

[Exomalopsis verbesinae Cockerell, 1904]

[Neopasites arizonicus Linsley, 1942]

[Neopasites insoletus Linsley, 1942]

[Neopasites elegans Linsley, 1944, Neopasites knulli Linsley, 1944]

[Protepeolus integer Linsley, 1939, Protepeolus singularis Linsley & Michener, 1937]

[Melissodes luteicornis Cockerell, 1896 Melissodes (Martinella_homonym) luteicornis Cockerell]

[Melissodes composita Tucker, 1909, Melissodes lupina composita Tucker, 1909]

[Melissodes atraticornis Cockerell, 1934, Melissodes civica Cockerell, 1910, Melissodes confusa Cresson, 1878, Melissodes ruidosensis Cockerell, 1896, Melissodes tenuitarsis Cockerell, 1905]

[Melissodes fasciatella LaBerge, 1961]

[Melissodes epicharina Cockerell, 1905, Melissodes gilensis crenata LaBerge, 1956, Melissodes gilensis crenatus LaBerge, 1956]

[Melissodes intermediella Cockerell, 1905]

[Melissodes catalinensis vanduzeei Cockerell, 1923, Melissodes intermediella catalinensis Cockerell, 1905, Melissodes lupina Cresson, 1878]

[Melissodes blakei Cockerell, 1905, Melissodes lavata Cockerell, 1924, Melissodes mizeae Cockerell, 1905, Melissodes octobris Cockerell, 1934, Melissodes pallida Robertson, 1895]

[Eucera oajacana Dalla Torre, 1896, Melissodes atrifera Cockerell, 1910, Melissodes atrifera sandiarum Cockerell, 1910, Melissodes hirsuta Smith, 1879, Melissodes montana Cresson, 1878]

[Melissodes pallidisignata Cockerell, 1905, Melissodes praelauta Cockerell, 1905]

[Melissodes communis gratior Cockerell, 1923, Melissodes helenae Cockerell, 1906, Melissodes parosetae Cockerell, 1905]

[Melissodes pecosella Cockerell, 1905, Tetraloniella excurrens (Cockerell, 1903), Xenoglossodes excurrens Cockerell, 1903]

[Melissodes hewetti Cockerell, 1905]

[Melissodes kallstroemiae Cockerell, 1905, Melissodes thelypodii stulta LaBerge, 1956, Melissodes thelypodii stultus LaBerge, 1956, Melissodes thurberiae Cockerell, 1914]

[Melissodes pallidicincta Cockerell, 1896, Melissodes semitristis Cockerell, 1905, Melissodes tristis malvina Cockerell, 1902]

[Hypochrotaenia gutierreziae (Cockerell, 1896)]

[Hypochrotaenia heiligbrodtii (Cresson, 1878), Hypochrotaenia texana (Cresson, 1878), Nomada heiligbrodtii Cresson, 1878]

[Eucera pruinosa (Say, 1837), Macrocera pruinosa Say, 1837, Xenoglossa angelica Cockerell, 1902, Xenoglossa howardi Cockerell, 1918, Xenoglossa pruinosa (Say, 1837)]

[Melissodes machaerantherae Cockerell, 1904]

[Macrocera obliqua Say, 1837, Melissodes caliginosa Cresson, 1878, Melissodes obliqua (Say, 1837), Svastra obliqua caliginosa (Cresson, 1878), Svastra obliqua expurgata (Cockerell, 1925)]

[Melissodes sabinensis Cockerell, 1924, Melissodes sabinensis nubila LaBerge, 1956, Svastra sabinensis laterufa (Cockerell, 1934), Svastra sabinensis nubila (LaBerge, 1956)]

[Melissodes texana Cresson, 1872, Melissodes texana eluta LaBerge, 1956, Melissodes texana flaveriae Cockerell, 1906, Svastra texana eluta (LaBerge, 1956)]

[Melissodes exquisita Cresson, 1878, Melissodes herricki Cockerell, 1905]

[Exomalopsis eriocarpi Cockerell, 1898, Melissodes agilis parksi Cockerell, 1935, Melissodes albocincta Cockerell, 1919, Melissodes neotomae (Cockerell, 1906), Melissodes pimella Cockerell, 1906, Xenoglossodes neotomae Cockerell, 1906]

[Tetralonia flagellicornis Smith, 1879]

[Synhalonia crenulaticornis lippiae Cockerell, 1904]

[Exomalopsis perconcinna Cockerell, 1949, Melissodes albomarginalis Cockerell, 1949]

[Epeolus grandis Friese, 1917]

[Epeolus digueti Cockerell, 1905, Epeolus intrepidus Smith, 1879, Triepeolus digueti Cockerell, 1905]

[Triepeolus fortis Cockerell, 1921, Triepeolus insolitus Cockerell, 1921, Triepeolus trilobatus Cockerell, 1921]

[Epeolus metatarsalis Friese, 1921, Epeolus mexicanus Cresson, 1878, Epeolus rugulosus Cockerell, 1917, Triepeolus bilunatus Cockerell, 1949, Triepeolus metatarsalis (Friese, 1921), Triepeolus rugulosus (Cockerell, 1917)]

[Epeolus penicilliferus Brues, 1903, Triepeolus perelegans Cockerell, 1921, Triepeolus trichopygus Cockerell and Timberlake, 1929]

[Triepeolus concinnus Cockerell, 1917]

[Epeolus verbesinae Cockerell, 1897]

[Nomada pasitura Cockerell, 1935, Nomada penniger Cockerell, 1894, Triopasites laguna Linsley, 1943, Triopasites micheneri Linsley, 1943, Triopasites timberlakei Linsley, 1939]

[Xenoglossa patricia angustior Cockerell, 1900]

[Eucera strenua (Dalla Torre, 1896), Melissodes strenua Cresson, 1878, Xenoglossa cucurbitarum Cockerell, 1896]

[Melecta interrupta Cresson, 1872, Melecta interrupta fallugiae Cockerell, 1904]

[Xylocopa amblardi Pérez, 1901, Xylocopa arizonensis Cresson, 1879, Xylocopa californica arizonensis Cresson, 1879, Xylocopa californica diamesa Hurd, 1954, Xylocopa libocedri Cockerell, 1914]

[Xylocopa varipuncta Patton, 1879]

[Melecta maculata Cresson, 1879, Melecta suffusa Viereck, 1924, Zacosmia maculata desertorum Cockerell, 1916]

[Colletes compacta Cresson, 1868, Colletes compactus hesperius Swenk, 1906, Colletes hesperius Swenk, 1906]

[Colletes eulophi albertensis Cockerell, 1938, Colletes sieverti Cockerell, 1906, Colletes stricklandi Cockerell, 1938]

[Colletes lineata Metz, 1910]

[Colletes tucsonensis Cockerell, 1906]

[Colletes eriogoni Cockerell, 1939]

[Colletes apacheorum Timberlake, 1943]

[Hylaeus labiatifrons (Cockerell, 1896), Hylaeus laciniatus Cockerell and Sumner, 1931, Hylaeus mesillae cressoni (Cockerell, 1907), Hylaeus repolitus Cockerell and Sumner, 1931, Hylaeus teleporus (Lovell, 1911)]

[Hylaeus perparvus Cockerell and Sumner, 1931, Hylaeus tuertonis (Cockerell, 1906)]

[Caupolicana elegans Timberlake, 1965]

[Agapostemon digueti Cockerell, 1924, Agapostemon fasciatus Crawford, 1901, Halictus plurifasciatus Vachal, 1903]

[Agapostemon cockerelli Crawford, 1901, Augochlora obliqua Provancher, 1888]

[Agapostemon pulchra Smith, 1853, Agapostemon radiatus (Say, 1837), Agapostemon sulcatulus Cockerell, 1909, Apis sericea Forster, 1771, Halictus radiatus Say, 1837]

[Agapostemon aeruginosus Smith, 1853, Halictus splendens Lepeletier, 1841]

[Agapostemon angelicus idahoensis Michener, 1937, Agapostemon borealis Crawford, 1901, Agapostemon californicus Crawford, 1901, Agapostemon cyanozonus Cockerell, 1924, Agapostemon joseanus Friese, 1917, Agapostemon proscriptellus Cockerell, 1924, Agapostemon proscriptus Cockerell, 1912, Agapostemon sulfuripes Friese, 1917, Agapostemon texanus iowensis Cockerell, 1910, Agapostemon texanus subtilior Cockerell, 1898, Agapostemon texanus vandykei Cockerell, 1925, Halictus brachycerus Vachal, 1903]

[Agapostemon martini Cockerell, 1927]

[Augochlora dimissa Cockerell, 1923, Augochlora neglectula Cockerell, 1897, Augochlorella neglectula maritima Ordway, 1966]

[Augochlora pomoniella Cockerell, 1915, Augochlora utahensis Michener, 1937]

[Andrena metallica Fabricius, 1793, Augochlora cleomis Titus, 1901, Augochlora cuprea Smith, 1853, Augochlora fervida Smith, 1853, Augochlora fulgida Smith, 1853, Augochlora fulvofimbriata Friese, 1917, Augochlora lucidula Smith, 1853, Augochloropsis metallica fulgida (Smith, 1853), Halictus chorisis Vachal, 1903, Halictus viridissimus Viereck, 1910]

[Nomia micheneri Cross, 1958]

[Dieunomia nevadensis angelesia (Cockerell, 1910), Dieunomia nevadensis bakeri (Cockerell, 1898), Nomia arizonensis Cockerell, 1899, Nomia bakeri Cockerell, 1898, Nomia nevadensis Cresson, 1874, Nomia nevadensis stellata Cross, 1958, Nomia pattoni Cockerell, 1910]

[Halictus armaticeps Cresson, 1872, Halictus ornatipes Cresson, 1872, Halictus texanus (Cresson, 1872), Halictus townsendi Cockerell, 1896]

[Halictus catalinensis Cockerell, 1903, Halictus meliloti Cockerell, 1895, Seladonia tripartita (Cockerell, 1895)]

[Halictus arcanus Sandhouse, 1924]

[Halictus cyaneiceps Cockerell, 1916, Halictus desertus Smith, 1879]

[Halictus heterorhinus Cockerell, 1930, Lasioglossum heterorhinum (Cockerell, 1930)]

[Halictus hudsoniellus Cockerell, 1919]

[Halictus hunteri Crawford, 1932]

[Halictus lampronotus Cameron, 1905, Halictus politifrons Cockerell, 1939, Lasioglossum politifrons (Cockerell, 1939)]

[Halictus manitouellus Cockerell, 1908]

[Halictus microlepoides Ellis, 1914]

[Halictus morrilli Cockerell, 1919]

[Halictus obnubilus Sandhouse, 1924]

[Halictus grindeliae Cockerell, 1934, Halictus pectoraloides Cockerell, 1895]

[Halictus pulveris Cockerell, 1930]

[Halictus insulsus Sandhouse, 1924, Halictus ruidosensis Cockerell, 1897, Lasioglossum insulsum (Sandhouse, 1924)]

[Halictus actuarius Sandhouse, 1924, Halictus exalbidus, Halictus glaucovirens Cockerell, 1919, Halictus pruinosiformis Crawford, 1906, Halictus semicaeruleus Cockerell, 1895, Lasioglossum actuarium (Sandhouse, 1924), Lasioglossum pruinosiforme (Crawford, 1906)]

[Halictus sisymbrii Cockerell, 1895]

[Nomia mesillensis Cockerell, 1908]

[Nomia californiensis Michener, 1937, Nomia moctezumae Crawford, 1911, Nomia parksi Cockerell, 1934, Nomia tetrazonata tetrazonata Cockerell, 1910, Nomia tetrazonata uvaldensis Cockerell, 1930, Nomia uvaldensis Cockerell, 1930, Nomia zabriskii Cockerell and Blair, 1930]

[Sphecodes pecosensis salicis Cockerell, 1922]

[Anthidiellum notatum gilense (Cockerell, 1897), Anthidium gilense Cockerell, 1897]

[Anthidiellum notatum robertsoni (Cockerell, 1904), Anthidiellum robertsoni citrinellum Cockerell, 1925, Anthidiellum robertsoni race citrinellum Cockerell, 1925, Dianthidium robertsoni Cockerell, 1904]

[Anthidium cognatum Cresson, 1878, Anthidium zamoranicum Cockerell, 1949]

[Anthidium americanum Friese, 1911, Anthidium lupinellum Cockerell, 1904, Anthidium uyacanum Cockerell, 1949]

[Anthidium porterae amabile Cockerell, 1904, Anthidium porterae personulatum Cockerell, 1907]

[Heriades bigeloviae Cockerell, 1897]

[Ashmeadiella crassa Cockerell, 1924, Ashmeadiella meliloti crassa Cockerell, 1924, Heriades meliloti Cockerell, 1897]

[Ashmeadiella arizonensis Michener, 1936, Ashmeadiella submaxima Michener, 1936, Heriades opuntiae Cockerell, 1897]

[Ashmeadiella schwarzi Titus, 1904, Ashmeadiella subangusta Cockerell, 1924, Heriades prosopidis Cockerell, 1897]

[Coelioxys fragariae Cockerell, 1912, Coelioxys quercina Cockerell, 1912]

[Coelioxys deplanata Cresson, 1878]

[Coelioxys novomexicana Cockerell, 1909, Coelioxys sayi novomexicana Cockerell, 1909]

[Coelioxys altilis Cresson, 1879, Coelioxys atlantica Mitchell, 1962, Coelioxys catalinica Cockerell, 1940, Coelioxys coquilletti Crawford, 1914, Coelioxys crassula Cockerell, 1919, Coelioxys cressoni Dalla Torre, 1896, Coelioxys mediata Cockerell, 1925, Coelioxys megatricha Cockerell, 1916, Coelioxys octodentata Say, 1824]

[Coelioxys texana sonorensis Cockerell, 1914]

[Paranthidium arizonicum (Rohwer, 1916)]

[Dianthidium fraternum hirtulum Timberlake, 1943, Dianthidium heterulkei cornucopiana Schwarz, 1940, Dianthidium heterulkei fraternum Timberlake, 1943]

[Anthidium parvum Cresson, 1878, Dianthidium parvum basingeri Timberlake, 1943, Dianthidium parvum heteropoda Schwarz, 1934, Dianthidium parvum schwarzi Timberlake, 1943, Dianthidium profugum Cockerell, 1923]

[Dianthidium parvum baculifrons Cockerell, 1925, Dianthidium parvum race baculifrons Cockerell, 1925, Dianthidium platyurum mohavense Timberlake, 1943, Dianthidium ulkei riparii Schwarz, 1928]

[Anthidium davidsoni Cockerell, 1904, Anthidium ulkei Cresson, 1878, Dianthidium davidsoni Cockerell, 1904, Dianthidium ulkei cooleyi Schwarz, 1927, Dianthidium ulkei perterritum Cockerell, 1913, Dianthidium ulkei reductum Timberlake, 1943]

[Heriades crucifer Cockerell, 1897]

[Lithurgopsis apicalis opuntiae Cockerell, 1902, Lithurgus apicalis Cresson, 1875, Lithurgus arizonensis Cockerell, 1937]

[Lithurgus echinocacti Cockerell, 1898]

[Chalicodoma adelphodonta (Cockerell, 1924), Megachile tucsonensis Mitchell, 1956]

[Megachile subfortis Mitchell, 1936]

[Megachile pallidiana Mitchell, 1934]

[Megachile mendica coquilletti Cockerell, 1915]

[Chalicodoma discorhina (Cockerell, 1924)]

[Chalicodoma exilis (Cresson, 1872), Megachile exilis parexilis Mitchell, 1937, Megachile exilis var. parexilis Mitchell, 1937, Megachile studiosa Cresson, 1872]

[Megachile fidelis concinnula Cockerell, 1899]

[Megachile frigida appalachensis Mitchell, 1935, Megachile monardarum Cockerell, 1900, Megachile vidua appalachensis Mitchell, 1935, Megachile vidua var. appalachensis Mitchell, 1935]

[Megachile frugalis atrescens Cockerell, 1931, Megachile frugalis pseudofrugalis Mitchell, 1937, Megachile frugalis var. pseudofrugalis Mitchell, 1937]

[Megachile murinella Cockerell, 1908, Megachile palmarum Perkins, 1899]

[Megachile heterodonta Cockerell, 1900, Megachile inimica jacumbensis Mitchell, 1927, Megachile inimica sayi (Cresson, 1878), Megachile sayi Cresson, 1878]

[Megachile cleomis lippiae Cockerell, 1900, Megachile schismatura Cockerell, 1908]

[Chalicodoma lobatifrons (Cockerell, 1924)]

[Megachile chrysothamni Cockerell, 1908]

[Megachile calogaster Cockerell, 1898, Megachile canadensis Friese, 1903, Megachile gemula var. fulvogemula Mitchell, 1935, Megachile melanophaea calogaster Cockerell, 1898, Megachile melanophaea rohweri Cockerell, 1906, Megachile melanophaea submelanophaea Mitchell, 1935, Megachile melanophaea var. submelanophaea Mitchell, 1935, Megachile melanophaea wootoni Cockerell, 1898, Megachile pseudolatimanus Strand, 1919, Megachile tuala Strand, 1919, Megachile wootoni Cockerell, 1898]

[Megachile helianthi Cockerell, 1908]

[Megachile howardi Cockerell, 1919]

[Megachile brevis onobrychidis Cockerell, 1908]

[Megachile asterae Mitchell, 1943, Megachile facunda Cresson, 1872, Megachile parallela var. rita Mitchell, 1937, Megachile parallela var. tulariana Mitchell, 1937, Megachile sexdentata Robertson, 1895, Megachile verbesinae Cockerell, 1908]

[Megachile latimanus grindeliarum Cockerell, 1904]

[Megachile mexicana Cresson, 1878]

[Megachile grandis Cresson, 1872, Megachile pollicaris Say, 1837, Megachile vallorum Cockerell, 1900]

[Chalicodoma prosopidis (Cockerell, 1900)]

[Megachile pararubi Mitchell, 1957]

[Megachile abducta Mitchell, 1926]

[Megachile mendica snowi Mitchell, 1927]

[Chalicodoma spinotulata (Mitchell, 1934), Chalicodoma subspinotulata (Mitchell, 1934), Megachile subspinotulata Mitchell, 1934]

[Chalicodoma subexilis (Cockerell, 1908), Megachile semiexilis Cockerell, 1908]

[Megachile generosa Cresson, 1878, Megachile vernonensis Cockerell, 1912]

[Megachile bishoppi Cockerell, 1915]

[Megachile bidens Friese, 1911, Megachile tuxtla Cresson, 1878]

[Osmia hypochrysea Cockerell, 1906, Osmia pasadenae Cockerell, 1910]

[Osmia vanduzeei Sandhouse, 1924]

[Osmia ribifloris biedermannii Michener, 1936]

[Diceratosmia subfasciata (Cresson, 1872), Osmia punctata Michener, 1936]

[Anthidium lepidum Cresson, 1878, Anthidium perpictum Cockerell, 1898, Megachile jugatoria Say, 1824, Paranthidium jugatorium butleri Snelling, 1962, Paranthidium jugatorium lepidum (Cresson, 1878), Paranthidium jugatorium perpictum (Cockerell, 1898), Stelis obesa Say, 1837]

[Stelis arizonensis Swenk, 1915]

[Panurgus rhodoceratus Cockerell, 1897]