| Hylaeus (Cephalylaeus) basalis Smith, 1853 | Basal Masked Bee |
| Hylaeus (Cephalylaeus) nunenmacheri Bridwell, 1919 | |
| Hylaeus (Dentigera) brevicornis (Nylander, 1852) | ⇒ Hylaeus brevicornis Nylander, 1852 |
| Hylaeus (Dentigera) imparilis Förster, 1871 | |
| Hylaeus (Deranchylaeus) lightfooti Bridwell, 1919 | |
| Hylaeus (Euprosopis) disjunctus Cockerell, 1905 | |
| Hylaeus (Euprosopoides) amatus Cockerell, 1909 | |
| Hylaeus (Gnathoprosopis) albonitens Cockerell, 1905 | Colletid bee |
| Hylaeus (Gnathoprosopis) amiculus Smith, 1879 | |
| Hylaeus (Gnathoprosopis) euxanthus Cockerell, 1910 | |
| Hylaeus (Heterapoides) halictiformis Perkins, 1912 | |
| Hylaeus (Heterapoides) leviceps Houston, 1975 | |
| Hylaeus (Hylaeana) aztecus Cresson, 1869 | |
| Hylaeus (Hylaeana) graenicheri Mitchell, 1951 | Graenicher´s Masked Bee |
| Hylaeus (Hylaeana) knabi Cockerell, 1918 | |
| Hylaeus (Hylaeana) panamensis Michener, 1954 | Long-legged cave amphipod |
| Hylaeus (Hylaeopsis) bertonii Schrottky, 1907 | |
| Hylaeus (Hylaeopsis) coroicensis Cockerell, 1918 | |
| Hylaeus (Hylaeopsis) crustatus Vachal, 1909 | |
| Hylaeus (Hylaeopsis) flavohumeralis Cockerell, 1918 | |
| Hylaeus (Hylaeopsis) gualanicus Cockerell, 1912 | |
| Hylaeus (Hylaeopsis) guaraniticus Schrottky, 1906 | |
| Hylaeus (Hylaeopsis) itapuensis Schrottky, 1906 | |
| Hylaeus (Hylaeopsis) subgriseus Cockerell, 1918 | |
| Hylaeus (Hylaeopsis) zamoranicus Cockerell, 1949 | |
| Hylaeus (Hylaeorhiza) nubilosus Smith, 1853 | Neighbor tagelus |
| Hylaeus (Hylaeus) angustatus Schenck, 1861 | |
| Hylaeus (Hylaeus) annulatus Linnaeus, 1758 | Annulate Masked Bee |
| Hylaeus (Hylaeus) communis Nylander, 1852 | Common Yellow Face Bee |
| Hylaeus (Hylaeus) conspicuus Metz, 1911 | |
| Hylaeus (Hylaeus) hellenicus Dathe, 2000 | |
| Hylaeus (Hylaeus) labiatifrons Cockerell, 1896 | |
| Hylaeus (Hylaeus) leptocephalus Morawitz, 1870 | Slender-faced Masked Bee |
| Hylaeus (Hylaeus) maritimus Bridwell, 1910 | |
| Hylaeus (Hylaeus) mesillae Cockerell, 1896 | Mesilla Masked Bee |
| Hylaeus mesillae cressoni Cockerell, 1907 | Cresson'S Masked Bee |
| Hylaeus (Hylaeus) rudbeckiae Cockerell & ..., 1895 | |
| Hylaeus (Hylaeus) saniculae Robertson, 1896 | |
| Hylaeus (Hylaeus) sejunctus Snelling, 1970 | |
| Hylaeus (Hylaeus) verticalis Cresson, 1869 | Vertical Masked Bee |
| Hylaeus (Koptogaster) bifasciatus Jurine, 1807 | |
| Hylaeus (Koptogaster) tetris Dathe, 2000 | |
| Hylaeus (Lambdopsis) annularis (Kirby, 1802) | ⇒ Hylaeus annularis Kirby, 1802 |
| Hylaeus (Lambdopsis) crassanus Warncke, 1972 | |
| Hylaeus (Lambdopsis) dilatatus (Kirby, 1802) | ⇒ Hylaeus annularis Kirby, 1802 |
| Hylaeus (Lambdopsis) euryscapus Förster, 1871 | |
| Hylaeus (Lamdopsis) annularis Kirby, 1802 | |
| Hylaeus (Macrohylaeus) alcyoneus Erichson, 1842 | Banksia bee |
| Hylaeus (Metziella) sparsus Cresson, 1869 | Broad-Faced Masked Bee |
| Hylaeus (Nesoprosopis) anomalus Perkins, 1899 | Anomalous yellow-faced bee |
| Hylaeus (Nesoprosopis) anthracinus Smith, 1853 | Neighbor tagelus |
| Hylaeus (Nesoprosopis) chlorostictus Perkins, 1899 | Boreal Whiteface |
| Hylaeus (Nesoprosopis) connectens Perkins, 1899 | Boreal Whiteface |
| Hylaeus (Nesoprosopis) difficilis Perkins, 1899 | Boreal Whiteface |
| Hylaeus (Nesoprosopis) facilis Smith, 1879 | Easy yellow-faced bee |
| Hylaeus (Nesoprosopis) fuscipennis Smith, 1879 | |
| Hylaeus (Nesoprosopis) hirsutulus Perkins, 1899 | Boreal Whiteface |
| Hylaeus (Nesoprosopis) hostilis Perkins, 1899 | Boreal Whiteface |
| Hylaeus (Nesoprosopis) pubescens Perkins, 1899 | Boreal Whiteface |
| Hylaeus (Nesoprosopis) sphecodoides Perkins, 1899 | Boreal Whiteface |
| Hylaeus (Nesoprosopis) volatilis Smith, 1879 | |
| Hylaeus (Nothylaeus) heraldicus Smith, 1853 | Neighbor tagelus |
| Hylaeus (Paraprosopis) asininus Cockerell & ..., 1895 | |
| Hylaeus (Paraprosopis) calvus Metz, 1911 | Bald Masked Bee |
| Hylaeus (Paraprosopis) canariensis Erlandsson, 1983 | |
| Hylaeus (Paraprosopis) coloradensis Cockerell, 1896 | |
| Hylaeus (Paraprosopis) georgicus Cockerell, 1898 | |
| Hylaeus (Paraprosopis) hohmanni Dathe, 1993 | |
| Hylaeus (Paraprosopis) lunicraterius Snelling, 1970 | |
| Hylaeus (Paraprosopis) megalotis Swenk & Cock..., 1910 | |
| Hylaeus (Paraprosopis) nevadensis Cockerell, 1896 | |
| Hylaeus (Paraprosopis) personatellus Cockerell, 1915 | |
| Hylaeus (Paraprosopis) pictipes Nylander, 1852 | Colletid bee |
| Hylaeus (Paraprosopis) polifolii Cockerell, 1901 | |
| Hylaeus (Paraprosopis) sonorensis Cockerell, 1924 | |
| Hylaeus (Paraprosopis) wootoni Cockerell, 1896 | |
| Hylaeus (Planihylaeus) probligenatus Houston, 1981 | |
| Hylaeus (Prosopis) affinis Smith, 1853 | Eastern Masked Bee |
| Hylaeus (Prosopis) confluens Smith, 1853 | Neighbor tagelus |
| Hylaeus (Prosopis) confusus Nylander, 1852 | White-Jawed Yellow-Face |
| Hylaeus (Prosopis) episcopalis Cockerell, 1896 | |
| Hylaeus episcopalis coquilletti | Coquillett´s Yellow-masked Bee |
| Hylaeus (Prosopis) incongruus Förster, 1871 | White-lipped yellow-face bee |
| Hylaeus (Prosopis) modestus Say, 1837 | Modest Masked Bee |
| Hylaeus (Prosopis) nelumbonis Robertson, 1890 | Nelumbo Masked Bee |
| Hylaeus (Prosopis) opaciventris Friese, 1925 | |
| Hylaeus (Prosopis) ornatus Mitchell, 1951 | |
| Hylaeus (Prosopis) rugulosus Perkins, 1899 | Boreal Whiteface |
| Hylaeus (Prosopis) schwarzii Cockerell, 1896 | Schwarz'S Masked Bee |
| Hylaeus (Prosopis) transvittatus Cockerell, 1917 | |
| Hylaeus (Prosopis) tuertonis Cockerell, 1906 | |
| Hylaeus (Prosopis) variegatus Fabricius, 1798 | Masked bee |
| Hylaeus (Prosopis) volusiensis Mitchell, 1951 | |
| Hylaeus (Prosopisteron) agilis Smith, 1876 | Purplish tagelus |
| Hylaeus (Prosopisteron) capitosus Smith, 1876 | Purplish tagelus |
| Hylaeus (Prosopisteron) relegatus Smith, 1876 | Purplish tagelus |
| Hylaeus (Spatulariella) hyalinatus (Smith, 1842) | ⇒ Hylaeus milossa Warncke, 1981 |
| Hylaeus (Spatulariella) iranicus Dathe, 1980 | |
| Hylaeus (Spatulariella) punctatus Brullé, 1832 | Punctate Masked Bee |
| Hylaeus (Sphaerhylaeus) globuliferus Cockerell, 1929 | Woolybush Bee |
| Hylaeus (Xenohylaeus) leptospermi Cockerell, 1922 | |
| Hylaeus aenigmus Viereck, 1903 | |
| Hylaeus akoko Daly & Magnacca, 2003 | |
| Hylaeus alampes Moure, 1942 | |
| Hylaeus alocaspidus Snelling, 1975 | |
| Hylaeus amazonicus Gribodo, 1894 | |
| Hylaeus andrenoides Perkins, 1899 | Boreal Whiteface |
| Hylaeus angustulus Perkins, 1899 | Boreal Whiteface |
| Hylaeus arsenicus Vachal, 1901 | |
| Hylaeus asper Vachal, 1909 | |
| Hylaeus aspricollis Vachal, 1901 | |
| Hylaeus assimulans Perkins, 1899 | Boreal Whiteface |
| Hylaeus atripes Vachal, 1901 | |
| Hylaeus basirufus Vachal, 1910 | |
| Hylaeus benoisti Michener, 2000 | |
| Hylaeus bequaerti Schrottky, 1910 | |
| Hylaeus binus Vachal, 1909 | |
| Hylaeus biscutellus Vachal, 1909 | |
| Hylaeus bisinuatus (Förster, 1871) | ⇒ Hylaeus leptocephalus Morawitz, 1870 |
| Hylaeus bolivianus Schrottky, 1910 | |
| Hylaeus bothros Schrottky, 1910 | |
| Hylaeus brachyceratomerus Moure, 1941 | |
| Hylaeus brasiliensis Schrottky, 1910 | |
| Hylaeus breviradia Vachal, 1901 | |
| Hylaeus breviradius Vachal, 1901 | |
| Hylaeus caarendyensis Schrottky, 1906 | |
| Hylaeus callosulus Meade-Waldo, 1923 | Grape blossom midge |
| Hylaeus cecidonastes Moure, 1972 | |
| Hylaeus cockerelli Schrottky, 1906 | |
| Hylaeus coniceps Blackburn, 1886 | Boxelder leaf gall midge |
| Hylaeus conspicua Metz, 1911 | |
| Hylaeus cookii Metz, 1911 | |
| Hylaeus costaricensis Friese, 1917 | |
| Hylaeus crabronoides Perkins, 1899 | Boreal Whiteface |
| Hylaeus cribellatus Vachal, 1901 | |
| Hylaeus cruentus Vachal, 1910 | |
| Hylaeus culiciformis Schrottky, 1906 | |
| Hylaeus curtellus Moure, 1960 | |
| Hylaeus curtulus Vachal, 1910 | |
| Hylaeus cuscoanus Strand, 1911 | |
| Hylaeus dictyotus Snelling, 1982 | Many-colored tellin |
| Hylaeus dimidiatus Perkins, 1899 | Boreal Whiteface |
| Hylaeus diplonymus Schulz, 1906 | Mealybug destroyer |
| Hylaeus dubiosus Cresson, 1869 | |
| Hylaeus dumetorum Perkins, 1899 | Boreal Whiteface |
| Hylaeus elliptica Kirby, 1837 | |
| Hylaeus ellipticus (Kirby, 1837) | ⇒ Hylaeus annulatus Linnaeus, 1758 |
| Hylaeus exiguus Schrottky, 1902 | |
| Hylaeus expansus Vachal, 1909 | |
| Hylaeus extrinsecus Snelling, 1982 | Many-colored tellin |
| Hylaeus fedorica Cockerell, 1909 | |
| Hylaeus femoralis Schrottky, 1902 | |
| Hylaeus filicum Perkins, 1911 | |
| Hylaeus fissus Vachal, 1901 | |
| Hylaeus flammipes Robertson, 1893 | |
| Hylaeus flavifrons W. F. Kirby, 1880 | Pear midge |
| Hylaeus flavipes Smith, 1853 | Neighbor tagelus |
| Hylaeus floridanus Robertson, 1893 | |
| Hylaeus formosus Krombein, 1953 | |
| Hylaeus fossisternis Vachal, 1909 | |
| Hylaeus gabonicus Vachal, 1899 | |
| Hylaeus gaigei Cockerell, 1916 | |
| Hylaeus geminus (Vachal, 1910) | ⇒ Lasioglossum interruptum Panzer, 1798 |
| Hylaeus genualis Vachal, 1909 | |
| Hylaeus georgica Cockerell, 1898 | |
| Hylaeus gracillimus Schrottky, 1902 | |
| Hylaeus granulatus Metz, 1911 | |
| Hylaeus grossus Cresson, 1869 | |
| Hylaeus haleakalae Perkins, 1899 | Boreal Whiteface |
| Hylaeus hilaris Smith, 1879 | |
| Hylaeus hula Perkins, 1911 | |
| Hylaeus hurdi Snelling, 1966 | |
| Hylaeus hydrangeae | |
| Hylaeus hydrophilus Schrottky, 1906 | |
| Hylaeus iheringi Schrottky, 1910 | |
| Hylaeus illinoisensis Robertson, 1896 | |
| Hylaeus inquilina Perkins, 1899 | Boreal Whiteface |
| Hylaeus insolitus Snelling, 1966 | |
| Hylaeus iridipennis Schrottky, 1906 | |
| Hylaeus joergenseni Schrottky, 1906 | |
| Hylaeus kauaiensis Perkins, 1899 | Boreal Whiteface |
| Hylaeus kokeensis Daly & Magnacca, 2003 | |
| Hylaeus kona Blackburn, 1886 | Boxelder leaf gall midge |
| Hylaeus kuakea Daly & Magnacca, 2003 | |
| Hylaeus kukui Daly & Magnacca, 2003 | |
| Hylaeus laetus Perkins, 1899 | Boreal Whiteface |
| Hylaeus larocai Moure, 1972 | |
| Hylaeus longiceps Perkins, 1899 | Boreal Whiteface |
| Hylaeus lumbellus Vachal, 1910 | |
| Hylaeus lychnis Vachal, 1910 | |
| Hylaeus maculipennis Smith, 1879 | |
| Hylaeus maculosus Friese, 1921 | |
| Hylaeus major Strand, 1912 | |
| Hylaeus makaha Magnacca, 2011 | |
| Hylaeus mana Daly & Magnacca, 2003 | |
| Hylaeus mapirensis Schrottky, 1910 | |
| Hylaeus metopii | |
| Hylaeus mexicanus Cresson, 1869 | |
| Hylaeus milossa Warncke, 1981 | |
| Hylaeus mimicus Daly & Magnacca, 2003 | |
| Hylaeus muranus Warncke, 1970 | |
| Hylaeus mutatus Perkins, 1899 | Boreal Whiteface |
| Hylaeus nasutus Vachal, 1910 | |
| Hylaeus nigripennis Vachal, 1909 | |
| Hylaeus nivicola Meade-Waldo, 1923 | Grape blossom midge |
| Hylaeus nunemacheri Bridwell, 1919 | |
| Hylaeus ombrias Perkins, 1899 | |
| Hylaeus orbicus Vachal, 1910 | |
| Hylaeus oregonensis | |
| Hylaeus palmaris Vachal, 1901 | |
| Hylaeus pannosus Vachal, 1909 | |
| Hylaeus paradoxicus Perkins, 1899 | Boreal Whiteface |
| Hylaeus paradoxus Schrottky, 1907 | |
| Hylaeus paraguayensis Schrottky, 1906 | |
| Hylaeus paulistanus Schrottky, 1906 | |
| Hylaeus pele Perkins, 1911 | |
| Hylaeus peruvianus Schrottky, 1910 | |
| Hylaeus petroselini Schrottky, 1906 | |
| Hylaeus phaeoscapus Snelling, 1982 | Many-colored tellin |
| Hylaeus polybiaeformis Schrottky, 1907 | |
| Hylaeus polybioides Schrottky, 1906 | |
| Hylaeus preposterosus Snelling, 1982 | Many-colored tellin |
| Hylaeus proteae Cockerell, 1942 | |
| Hylaeus psammobius Perkins, 1899 | |
| Hylaeus psammophilus Schrottky, 1906 | |
| Hylaeus puerulus Vachal, 1910 | |
| Hylaeus quadratifer Cockerell, 1912 | |
| Hylaeus rawi Snelling, 1982 | Many-colored tellin |
| Hylaeus recisus Vachal, 1910 | |
| Hylaeus rivalis Schrottky, 1906 | |
| Hylaeus royesi Raw, 1984 | |
| Hylaeus rufipedoides Strand, 1911 | |
| Hylaeus rufoclypeatus Friese, 1917 | |
| Hylaeus rufulus Friese, 1908 | |
| Hylaeus rugosus Smith, 1879 | |
| Hylaeus saltensis Friese, 1908 | |
| Hylaeus scrobicauda Vachal, 1901 | |
| Hylaeus scrupeus Vachal, 1909 | |
| Hylaeus sculptilis Schrottky, 1910 | |
| Hylaeus seabrai Urban & Moure, 2002 | |
| Hylaeus seclusus Cockerell & ..., 1931 | |
| Hylaeus setosifrons Perkins, 1899 | Boreal Whiteface |
| Hylaeus solaris Daly & Magnacca, 2003 | |
| Hylaeus sparsa Cresson, 1869 | |
| Hylaeus specularis Perkins, 1899 | Boreal Whiteface |
| Hylaeus stenops Schrottky, 1910 | |
| Hylaeus stilbaspis Vachal, 1901 | |
| Hylaeus strenuus Cameron, 1897 | Plasterer bee |
| Hylaeus suffusa Cockerell, 1896 | |
| Hylaeus suffusus Cockerell, 1896 | |
| Hylaeus takumiae Daly & Magnacca, 2003 | |
| Hylaeus timberlakei Snelling, 1970 | |
| Hylaeus titanius Friese, 1925 | |
| Hylaeus transversus Vachal, 1909 | |
| Hylaeus transvittata Cockerell, 1917 | |
| Hylaeus triangulum Fabricius, 1793 | |
| Hylaeus tricolor Schrottky, 1906 | |
| Hylaeus trisulcus Vachal, 1910 | |
| Hylaeus trivittatus Friese, 1917 | |
| Hylaeus ubertus Vachal, 1910 | |
| Hylaeus ulaula Magnacca, 2011 | |
| Hylaeus unicus Perkins, 1899 | Boreal Whiteface |
| Hylaeus vachali Meade-Waldo, 1923 | Grape blossom midge |
| Hylaeus vachalianus Moure, 1960 | |
| Hylaeus variolosus Smith, 1853 | Neighbor tagelus |
| Hylaeus vigilans Smith, 1879 | |
| Hylaeus villosellus Moure, 1960 | |
| Hylaeus volcanicus Perkins, 1899 | Boreal Whiteface |
| Hylaeus xanthocephalus Schrottky, 1906 | |
| Hylaeus yaguarae Schrottky, 1913 | |
| Hyleoides concinna Fabricius, 1775 | Common Wasp-mimic Bee |
