| Family | genus | species | author | Type Number | Category |
| Halictidae | Agapostemon | angelicus | Cockerell | 1502 | holotype |
| Halictidae | Agapostemon | ascius | Roberts | 11615 | holotype |
| Halictidae | Agapostemon | californicus psammobius | Cockerell | 4654 | holotype |
| Halictidae | Agapostemon | cyanozonus | Cockerell | 1506 | holotype |
| Halictidae | Agapostemon | digueti | Cockerell | 1505 | holotype |
| Halictidae | Agapostemon | epichryseus | Cockerell | 2462 | holotype |
| Halictidae | Agapostemon | erebus | Roberts | 11616 | holotype |
| Halictidae | Agapostemon | lanosus | Roberts | 11617 | holotype |
| Halictidae | Agapostemon | martini | Cockerell | 2461 | holotype |
| Halictidae | Agapostemon | mexicanus | Roberts | 11618 | holotype |
| Halictidae | Agapostemon | peninsularis | Roberts | 11619 | holotype |
| Halictidae | Agapostemon | proscriptellus | Cockerell | 1503 | holotype |
| Halictidae | Agapostemon | purpureopictus | Cockerell | 1504 | holotype |
| Halictidae | Agapostemon | texanus vandykei | Cockerell | 1652 | holotype |
| Halictidae | Augochlora | azteca transversalis | Sandhouse and Cockerell | 1547 | holotype |
| Halictidae | Augochlora | banksiella | Cockerell | 15591 | syntype |
| Halictidae | Augochlora | neglectula | Cockerell | 15592 | syntype |
| Halictidae | Augochlora | sumptuosa bolliana | Cockerell | 15593 | syntype |
| Halictidae | Austronomia | fumipennis | Pauly | 17361 | holotype |
| Halictidae | Ceylalictus | congoensis | Pesenko | 16023 | holotype |
| Halictidae | Conanthalictus | caerulescens | Timberlake | 14906 | holotype |
| Halictidae | Conanthalictus | cockerelli | Timberlake | 14907 | holotype |
| Halictidae | Conanthalictus | deserticola | Timberlake | 14908 | holotype |
| Halictidae | Conanthalictus | dicksoni | Timberlake | 14909 | holotype |
| Halictidae | Conanthalictus | macrops | Cockerell | 15594 | holotype |
| Halictidae | Conanthalictus | mentzeliae | Timberlake | 14910 | holotype |
| Halictidae | Conanthalictus | minor | Timberlake | 14911 | holotype |
| Halictidae | Conanthalictus | namatophilus | Timberlake | 14912 | holotype |
| Halictidae | Conanthalictus | nigricans | Timberlake | 14913 | holotype |
| Halictidae | Conanthalictus | seminiger | Michener | 8743 | holotype |
| Halictidae | Dialictus | ornduffi | Hurd | 11395 | holotype |
| Halictidae | Diandrena | scintilla | Cockerell | 15595 | holotype |
| Halictidae | Dufourea | afasciata | Bohart | 5979 | holotype |
| Halictidae | Dufourea | brevicornis | Timberlake | 14914 | holotype |
| Halictidae | Dufourea | calientensis | Timberlake | 14915 | holotype |
| Halictidae | Dufourea | cuprea | Bohart | 5970 | holotype |
| Halictidae | Dufourea | dammersi | Timberlake | 14916 | holotype |
| Halictidae | Dufourea | dentipes | Bohart | 5981 | holotype |
| Halictidae | Dufourea | descansana | Cockerell | 15596 | holotype |
| Halictidae | Dufourea | desertorum | Timberlake | 14917 | holotype |
| Halictidae | Dufourea | dilatipes | Bohart | 5983 | holotype |
| Halictidae | Dufourea | echinocacti | Timberlake | 14918 | holotype |
| Halictidae | Dufourea | femorata | Bohart | 5968 | holotype |
| Halictidae | Dufourea | gilia | Bohart | 11320 | holotype |
| Halictidae | Dufourea | latifrons | Timberlake | 14919 | holotype |
| Halictidae | Dufourea | leachi | Timberlake | 14920 | holotype |
| Halictidae | Dufourea | linanthi | Timberlake | 14921 | holotype |
| Halictidae | Dufourea | longiceps | Bohart | 5977 | holotype |
| Halictidae | Dufourea | macswaini | Bohart | 11178 | holotype |
| Halictidae | Dufourea | malacothricis | Timberlake | 14922 | holotype |
| Halictidae | Dufourea | neocalifornica | Bohart | 5964 | holotype |
| Halictidae | Dufourea | nudicornis | Timberlake | 14923 | holotype |
| Halictidae | Dufourea | oenotherae | Timberlake | 14924 | holotype |
| Halictidae | Dufourea | pectinipes | Bohart | 5976 | holotype |
| Halictidae | Dufourea | tarsata | Bohart | 5965 | holotype |
| Halictidae | Dufourea | timberlakei | Bohart | 5967 | holotype |
| Halictidae | Dufourea | trochantera | Bohart | 5972 | holotype |
| Halictidae | Dufourea | truncata | Timberlake | 14925 | holotype |
| Halictidae | Dufourea | tularensis | Timberlake | 14926 | holotype |
| Halictidae | Dufourea | tuolumne | Bohart | 5961 | holotype |
| Halictidae | Dufourea | vanduzeei | Bohart | 5963 | holotype |
| Halictidae | Dufourea | vandykei | Bohart | 5974 | holotype |
| Halictidae | Dufourea | vernalis | Timberlake | 14927 | holotype |
| Halictidae | Dufourea | viridis | Timberlake | 14928 | holotype |
| Halictidae | Halictoides | altadenae | Michener | 8745 | holotype |
| Halictidae | Halictoides | australis | Michener | 8746 | holotype |
| Halictidae | Halictoides | bernardinus | Michener | 8747 | holotype |
| Halictidae | Halictoides | boregoensis | Michener | 15597 | holotype |
| Halictidae | Halictoides | californicus | Michener | 4363 | holotype |
| Halictidae | Halictoides | campanulae | Cockerell | 15598 | syntype |
| Halictidae | Halictoides | eschscholtziae | Michener | 8748 | holotype |
| Halictidae | Halictoides | fallugiae | Cockerell | 15599 | syntype |
| Halictidae | Halictoides | harveyi sierrae | Michener | 8749 | holotype |
| Halictidae | Halictoides | harveyi | Cockerell | 15600 | holotype |
| Halictidae | Halictoides | holocyaneus | Cockerell | 1659 | holotype |
| Halictidae | Halictoides | nemophilae | Michener | 8750 | holotype |
| Halictidae | Halictoides | pulchricornis | Cockerell | 15601 | holotype |
| Halictidae | Halictoides | rhamni | Michener | 8751 | holotype |
| Halictidae | Halictoides | ruficaudus | Michener | 8752 | holotype |
| Halictidae | Halictoides | sandhouseae | Michener | 8753 | holotype |
| Halictidae | Halictoides | spilurus | Cockerell | 1660 | holotype |
| Halictidae | Halictoides | virgatus | Cockerell | 15602 | syntype |
| Halictidae | Halictus | abietum | Michener | 4715 | holotype |
| Halictidae | Halictus | albuquerquensis | Michener | 4709 | holotype |
| Halictidae | Halictus | allonotus | Cockerell | 4272 | holotype |
| Halictidae | Halictus | aspilurus | Cockerell | 1651 | holotype |
| Halictidae | Halictus | cabrilli | Cockerell | 4660 | holotype |
| Halictidae | Halictus | chionocephalus | Sandhouse and Cockerell | 1546 | holotype |
| Halictidae | Halictus | cooleyi obscurior | Cockerell | 15603 | holotype |
| Halictidae | Halictus | cyanurus | Cockerell | 4273 | holotype |
| Halictidae | Halictus | eophilus | Ellis | 15604 | holotype |
| Halictidae | Halictus | euryceps | Ellis | 15605 | holotype |
| Halictidae | Halictus | exiguiformis | Ellis | 15606 | holotype |
| Halictidae | Halictus | giffardi | Michener | 4545 | holotype |
| Halictidae | Halictus | glaucovirens | Cockerell | 15607 | holotype |
| Halictidae | Halictus | grindeliae | Cockerell | 15608 | holotype |
| Halictidae | Halictus | hammondi | Cockerell | 15609 | holotype |
| Halictidae | Halictus | humboldtensis | Michener | 4200 | holotype |
| Halictidae | Halictus | jameseae | Cockerell | 15610 | holotype |
| Halictidae | Halictus | lazulis | Ellis | 15611 | syntype |
| Halictidae | Halictus | lupinelli | Cockerell | 4274 | holotype |
| Halictidae | Halictus | marinensis | Michener | 4202 | holotype |
| Halictidae | Halictus | megastictus | Cockerell | 4655 | holotype |
| Halictidae | Halictus | meliloti | Cockerell | 15613 | holotype |
| Halictidae | Halictus | mendocinensis | Michener | 4201 | holotype |
| Halictidae | Halictus | miguelensis | Cockerell | 4661 | holotype |
| Halictidae | Halictus | ororyctes | Cockerell | 15614 | holotype |
| Halictidae | Halictus | orthocarpi | Cockerell | 4275 | holotype |
| Halictidae | Halictus | pacificus | Cockerell | 15615 | lectotype |
| Halictidae | Halictus | pasadenae | Michener | 4716 | holotype |
| Halictidae | Halictus | pavonotus | Cockerell | 1650 | holotype |
| Halictidae | Halictus | perdifficilis | Cockerell | 15616 | holotype |
| Halictidae | Halictus | perichlarus | Cockerell | 4657 | holotype |
| Halictidae | Halictus | perpunctatus | Ellis | 15617 | holotype |
| Halictidae | Halictus | pilosellus | Cockerell | 4276 | holotype |
| Halictidae | Halictus | pilosicaudus | Cockerell | 4659 | holotype |
| Halictidae | Halictus | punctiferellus | Cockerell | 4658 | holotype |
| Halictidae | Halictus | ripariellus | Cockerell | 15618 | holotype |
| Halictidae | Halictus | sequoiae | Michener | 4199 | holotype |
| Halictidae | Halictus | tenuis | Ellis | 15619 | holotype |
| Halictidae | Halictus | tracyi | Cockerell | 4277 | holotype |
| Halictidae | Halictus | trizonatus | Cresson | 15880 | neotype |
| Halictidae | Halictus | vanduzeei | Sandhouse and Cockerell | 1545 | holotype |
| Halictidae | Hesperapis | parva | Michener | 4714 | holotype |
| Halictidae | Lasioglossum | anhypops | McGinley | 15881 | holotype |
| Halictidae | Lasioglossum | channelense | McGinley | 15882 | holotype |
| Halictidae | Lasioglossum | noctivagum | Linsley and MacSwain | 9543 | holotype |
| Halictidae | Lasioglossum | sandrae | McGinley | 15883 | holotype |
| Halictidae | Lasioglossum | tropidonotum | McGinley | 15884 | holotype |
| Halictidae | Mexalictus | arizonensis | Eickwort | 13368 | holotype |
| Halictidae | Micralictoides | mojavensis | Bohart | 13462 | holotype |
| Halictidae | Mimulapis | versatilis rufiventris | Timberlake | 14929 | holotype |
| Halictidae | Nomia | boharti | Cross | 6673 | holotype |
| Halictidae | Nomia | howardi vanduzeei | Cockerell | 1509 | holotype |
| Halictidae | Nomia | melanderi paysoni | Cockerell | 15620 | holotype |
| Halictidae | Nomia | melandri | Cockerell | 15621 | holotype |
| Halictidae | Nomia | micheneri | Cross | 6674 | holotype |
| Halictidae | Nomia | nevadensis stellata | Cross | 6675 | holotype |
| Halictidae | Panurgus | lustrans | Cockerell | 15622 | syntypes, 2 |
| Halictidae | Pronomia | dayi | Pauly | 17362 | holotype |
| Halictidae | Proteraner | leptanthi | Cockerell | 15623 | syntype |
| Halictidae | Proteraner | rhois | Cockerell | 15624 | holotype |
| Halictidae | Protodufourea | parca | Timberlake | 14930 | holotype |
| Halictidae | Protodufourea | wasbaueri | Timberlake | 14931 | holotype |
| Halictidae | Sphecodes | arroyanus | Cockerell | 15625 | holotype |
| Halictidae | Sphecodes | arvensiformis | Cockerell in Viereck | 15626 | syntype |
| Halictidae | Sphecodes | eustictus | Cockerell | 15627 | holotype |
| Halictidae | Sphecodes | hesperellus | Cockerell in Viereck | 15628 | syntype |
| Halictidae | Sphecodes | levesqueae | Cockerell | 15629 | holotype |
| Halictidae | Sphecodes | nigricans | Timberlake | 14932 | holotype |
| Halictidae | Sphecodes | olympicus | Cockerell in Viereck | 15630 | syntype |
| Halictidae | Sphecodes | patruelis | Cockerell | 15631 | holotype |
| Halictidae | Sphecodes | rohweri | Cockerell | 15632 | holotype |
| Halictidae | Sphecodes | sibuyanensis | Cockerell | 15633 | syntype |
| Halictidae | Sphecodes | sulcatulus | Cockerell | 15634 | holotype |
| Halictidae | Sphecodes | washingtoni | Cockerell in Viereck | 15635 | holotype |
| Halictidae | Xeralictus | timberlakei | Cockerell | 15636 | holotype |