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  Animalia
      Arthropoda
            Insecta
                    Hymenoptera
                      Apocrita
                        Aculeata
                          Apoidea
                                 [Sphecoidea]
                            Halictidae
                                     Agapostemon
                                             Agapostemon angelicus
                                             Agapostemon ascius
                                             Agapostemon californicus
                                               Agapostemon californicus ssp. psammobius
                                             Agapostemon centratus
                                             Agapostemon coloradinus
                                             Agapostemon cyanozonus
                                             Agapostemon digueti
                                             Agapostemon epichryseus
                                             Agapostemon erebus
                                             Agapostemon femoratus
                                             Agapostemon intermedius
                                             Agapostemon kohliellus
                                             Agapostemon lanosus
                                             Agapostemon leunculus
                                             Agapostemon martini
                                             Agapostemon melliventris
                                             Agapostemon mexicanus
                                             Agapostemon nasutus
                                             Agapostemon obliquus
                                             Agapostemon peninsularis
                                             Agapostemon poeyi
                                             Agapostemon proscriptellus
                                             Agapostemon purpureopictus
                                             Agapostemon semimelleus
                                             Agapostemon sericeus
                                             Agapostemon splendens
                                             Agapostemon texanus
                                               Agapostemon texanus ssp. vandykei
                                             Agapostemon tyleri
                                             Agapostemon virescens
                                     Augochlora
                                             Augochlora azteca
                                               Augochlora azteca ssp. transversalis
                                             Augochlora banksiella
                                             Augochlora neglectula
                                             Augochlora sumptuosa
                                               Augochlora sumptuosa ssp. bolliana
                                     Augochlorella
                                             Augochlorella pomoniella
                                     Austronomia
                                             Austronomia fumipennis
                                     Ceylalictus
                                             Ceylalictus congoensis
                                     Conanthalictus
                                             Conanthalictus caerulescens
                                             Conanthalictus cockerelli
                                             Conanthalictus deserticola
                                             Conanthalictus dicksoni
                                             Conanthalictus macrops
                                             Conanthalictus mentzeliae
                                             Conanthalictus minor
                                             Conanthalictus namatophilus
                                             Conanthalictus nigricans
                                             Conanthalictus seminiger
                                     Dialictus
                                             Dialictus ornduffi
                                     Dufourea
                                             Dufourea afasciata
                                             Dufourea brevicornis
                                             Dufourea calientensis
                                             Dufourea cuprea
                                             Dufourea dammersi
                                             Dufourea dentipes
                                             Dufourea descansana
                                             Dufourea desertorum
                                             Dufourea dilatipes
                                             Dufourea echinocacti
                                             Dufourea femorata
                                             Dufourea gilia
                                             Dufourea latifrons
                                             Dufourea leachi
                                             Dufourea linanthi
                                             Dufourea longiceps
                                             Dufourea macswaini
                                             Dufourea malacothricis
                                             Dufourea neocalifornica
                                             Dufourea nudicornis
                                             Dufourea oenotherae
                                             Dufourea pectinipes
                                             Dufourea tarsata
                                             Dufourea timberlakei
                                             Dufourea trochantera
                                             Dufourea truncata
                                             Dufourea tularensis
                                             Dufourea tuolumne
                                             Dufourea vanduzeei
                                             Dufourea vandykei
                                             Dufourea vernalis
                                             Dufourea viridis
                                     Eupetersia
                                             Eupetersia reticulata
                                             Eupetersia sakalava
                                     Habralictus
                                             Habralictus insularis
                              Halictinae
                                Halictini
                                     Halictoides
                                             Halictoides altadenae
                                             Halictoides australis
                                             Halictoides bernardinus
                                             Halictoides boregoensis
                                             Halictoides californicus
                                             Halictoides campanulae
                                             Halictoides eschscholtziae
                                             Halictoides fallugiae
                                             Halictoides harveyi
                                               Halictoides harveyi ssp. sierrae
                                             Halictoides holocyaneus
                                             Halictoides ilicifoliae
                                             Halictoides nemophilae
                                             Halictoides pulchricornis
                                             Halictoides rhamni
                                             Halictoides ruficaudus
                                             Halictoides sandhouseae
                                             Halictoides spilurus
                                             Halictoides virgatus
                                     Halictonomia
                                             Halictonomia ranomafanae
                                     Halictus
                                             Halictus abietum
                                             Halictus albuquerquensis
                                             Halictus allonotus
                                             Halictus aspilurus
                                             Halictus cabrilli
                                             Halictus chionocephalus
                                             Halictus cooleyi
                                               Halictus cooleyi ssp. obscurior
                                             Halictus cyanurus
                                             Halictus eophilus
                                             Halictus euryceps
                                             Halictus exiguiformis
                                             Halictus giffardi
                                             Halictus glaucovirens
                                             Halictus grindeliae
                                             Halictus hammondi
                                             Halictus humboldtensis
                                             Halictus jameseae
                                             Halictus jucundus
                                             Halictus lazulis
                                             Halictus lupinelli
                                             Halictus marinensis
                                             Halictus megastictus
                                             Halictus meliloti
                                             Halictus mendocinensis
                                             Halictus miguelensis
                                             Halictus ororyctes
                                             Halictus orthocarpi
                                             Halictus pacificus
                                             Halictus pasadenae
                                             Halictus pavonotus
                                             Halictus perdifficilis
                                             Halictus perichlarus
                                             Halictus perpunctatus
                                             Halictus pilosellus
                                             Halictus pilosicaudus
                                             Halictus punctiferellus
                                             Halictus ripariellus
                                             Halictus sequoiae
                                             Halictus tenuis
                                             Halictus tracyi
                                             Halictus trizonatus
                                             Halictus vanduzeei
                                     Lasioglossum
                                             Lasioglossum anhypops
                                             Lasioglossum ankaratrense
                                             Lasioglossum channelense
                                             Lasioglossum emirnense
                                             Lasioglossum nicolli
                                             Lasioglossum noctivagum
                                             Lasioglossum nudatum
                                             Lasioglossum sandrae
                                             Lasioglossum tegulariforme
                                             Lasioglossum trizonatum
                                             Lasioglossum tropidonotum
                                             Lasioglossum urenae
                                     Mexalictus
                                             Mexalictus arizonensis
                                     Micralictoides
                                             Micralictoides mojavensis
                                     Mimulapis
                                             Mimulapis versatilis
                                               Mimulapis versatilis ssp. rufiventris
                                     Nomia
                                             Nomia boharti
                                             Nomia howardi
                                               Nomia howardi ssp. vanduzeei
                                             Nomia melanderi
                                               Nomia melanderi ssp. paysoni
                                             Nomia melandri
                                             Nomia micheneri
                                             Nomia nevadensis
                                               Nomia nevadensis ssp. stellata
                              Nomiinae
                                     Panurgus
                                             Panurgus halictoides
                                             Panurgus lustrans
                                             Panurgus manifestus
                                             Panurgus melanocephalus
                                             Panurgus rhodoceratus
                                     Pronomia
                                             Pronomia dayi
                                     Proteraner
                                             Proteraner leptanthi
                                             Proteraner rhois
                                     Protodufourea
                                             Protodufourea parca
                                             Protodufourea wasbaueri
                                     Sphecodes
                                             Sphecodes arroyanus
                                             Sphecodes arvensiformis
                                             Sphecodes eustictus
                                             Sphecodes grandidieri
                                             Sphecodes hesperellus
                                             Sphecodes levesqueae
                                             Sphecodes nigricans
                                             Sphecodes olympicus
                                             Sphecodes patruelis
                                             Sphecodes rohweri
                                             Sphecodes sibuyanensis
                                             Sphecodes sulcatulus
                                             Sphecodes washingtoni
                                     Thrincostoma
                                             Thrincostoma conjugens
                                             Thrincostoma perineti
                                     Xeralictus
                                             Xeralictus timberlakei