Acroschismus bowditchi Pierce, 1909 accepted as Xenos pecki Kirby, 1813 (original description)
Acroschismus hunteri Pierce, 1909 accepted as Xenos hunteri (Pierce, 1909) (original description)
Acroschismus maximus Pierce, 1909 accepted as Xenos pecki Kirby, 1813 (original description)
Acroschismus pallidus texensis Pierce, 1909 accepted as Xenos pallidus (Brues, 1903) (original description)
Acroschismus pecosensis Pierce, 1909 accepted as Xenos pecki Kirby, 1813 (original description)
Acroschismus rubiginosi Pierce, 1909 accepted as Xenos rubiginosi (Pierce, 1909) (original description)
Acroschismus texani Pierce, 1909 accepted as Xenos pecki Kirby, 1813 (original description)
Caenocholax Pierce, 1909 (original description)
Caenocholax fenyesi Pierce, 1909 (original description)
Crawfordia cockerelli Pierce, 1909 (original description)
Elenchoides Pierce, 1909 accepted as Elenchus Curtis, 1831 (original description)
Elenchoides perkinsi Pierce, 1909 accepted as Elenchus perkinsi (Pierce, 1909) (original description)
Eupathocera pruinosae Pierce, 1909 accepted as Paraxenos lugubris (Pierce, 1908) (original description)
Halictostylops Pierce, 1909 accepted as Halictoxenos Pierce, 1909 (original description)
Halictostylops spencii Pierce, 1909 accepted as Halictoxenos spencei Nassonov, 1893 (original description)
Halictoxenos Pierce, 1909 (original description)
Halictoxenos crawfordi Pierce, 1909 (original description)
Halictoxenos graenicheri Pierce, 1909 accepted as Halictoxenos crawfordi Pierce, 1909 (original description)
Halictoxenos manilae Pierce, 1909 (original description)
Halictoxenos robbi Pierce, 1909 (original description)
Halictoxenos sparsi Pierce, 1909 accepted as Halictoxenos crawfordi Pierce, 1909 (original description)
Halictoxenos versati Pierce, 1909 accepted as Halictoxenos crawfordi Pierce, 1909 (original description)
Halictoxenos zephyri Pierce, 1909 accepted as Halictoxenos crawfordi Pierce, 1909 (original description)
Hamilops abbotti Pierce, 1909 accepted as Paraxenos abbotti (Pierce, 1909) (original description)
Hamilops ashmeadi Pierce, 1909 accepted as Paraxenos westwoodi (Templeton, 1841) (original description)
Hamilops bishoppi Pierce, 1909 accepted as Paraxenos westwoodi (Templeton, 1841) (original description)
Leionotoxenos Pierce, 1909 accepted as Pseudoxenos Saunders, 1872 (original description)
Leionotoxenos hookeri Pierce, 1909 accepted as Pseudoxenos hookeri (Pierce, 1909) (original description)
Leionotoxenos jonesi Pierce, 1909 accepted as Pseudoxenos jonesi (Pierce, 1909) (original description)
Leionotoxenos louisianae Pierce, 1909 accepted as Pseudoxenos louisianae (Pierce, 1909) (original description)
Monobiaphila Pierce, 1909 accepted as Pseudoxenos Saunders, 1872 (original description)
Monobiaphila bishoppi Pierce, 1909 accepted as Pseudoxenos bishoppi (Pierce, 1909) (original description)
Neocholax Pierce, 1909 accepted as Halictophagus Perkins, 1905 (original description)
Pentagrammaphila Pierce, 1909 accepted as Halictophagus Perkins, 1905 (original description)
Pentagrammaphila uhleri Pierce, 1909 accepted as Halictophagus uhleri (Pierce, 1909) (original description)
Pentoxocera schwarzi Pierce, 1909 accepted as Halictophagus variatus Kinzelbach, 1971 (original description)
Sceliphronechthrus Pierce, 1909 accepted as Paraxenos Saunders, 1872 (original description)
Sceliphronechthrus fasciati Pierce, 1909 accepted as Paraxenos fasciati (Pierce, 1909) (original description)
Stylops advarians Pierce, 1909 (original description)
Stylops bipunctatae Pierce, 1909 (original description)
Stylops bruneri Pierce, 1909 (original description)
Stylops californicus Pierce, 1909 (original description)
Stylops claytoniae Pierce, 1909 (original description)
Stylops cornii Pierce, 1909 (original description)
Stylops crawfordi Pierce, 1909 (original description)
Stylops cressoni Pierce, 1909 (original description)
Stylops dominiquei Pierce, 1909 (original description)
Stylops graenicheri Pierce, 1909 accepted as Stylops cornii Pierce, 1909 (original description)
Stylops hartfordensis Pierce, 1909 accepted as Stylops bruneri Pierce, 1909 (original description)
Stylops hippotes Pierce, 1909 (original description)
Stylops imitatrix Pierce, 1909 accepted as Stylops claytoniae Pierce, 1909 (original description)
Stylops multiplicatae Pierce, 1909 (original description)
Stylops nasoni Pierce, 1909 accepted as Stylops hartfordensis Pierce, 1909 accepted as Stylops bruneri Pierce, 1909 (original description)
Stylops nassonowi Pierce, 1909 (original description)
Stylops nasssanowi Pierce, 1909 accepted as Stylops nassonowi Pierce, 1909 (original description)
Stylops nubeculae Pierce, 1909 (original description)
Stylops oklahomae Pierce, 1909 accepted as Stylops bipunctatae Pierce, 1909 (original description)
Stylops packardi Pierce, 1909 (original description)
Stylops polemonii Pierce, 1909 (original description)
Stylops salicifloris Pierce, 1909 accepted as Stylops hippotes Pierce, 1909 (original description)
Stylops solidulae Pierce, 1909 accepted as Stylops cornii Pierce, 1909 (original description)
Stylops sparsipilosae Pierce, 1909 (original description)
Stylops subcandidae Pierce, 1909 (original description)
Stylops swenki Pierce, 1909 (original description)
Stylops ventricosae Pierce, 1909 (original description)
Stylops vicinae Pierce, 1909 (original description)
Stylops vierecki Pierce, 1909 accepted as Stylops claytoniae Pierce, 1909 (original description)
Triozocera Pierce, 1909 (original description)
Triozocera mexicana Pierce, 1909 (original description)
Vespaexenos Pierce, 1909 accepted as Xenos Rossius, 1793 (original description)
Vespaexenos buyssoni Pierce, 1909 accepted as Xenos moutoni (du Buysson, 1903) (original description)
Vespaexenos crabronis Pierce, 1909 accepted as Xenos moutoni (du Buysson, 1903) (original description)
Xenos bruesi Pierce, 1909 accepted as Xenos pecki Kirby, 1813 (original description)