Key to species of Hurleyella Runyon & Robinson (males)

1 Body length approximately 1 mm; wing with vein R 2+3 unusually short and veins R 4+5 and M 1 converging to nearly parallel apically (as in Figs 3, 4); palpus and fore tarsus unmodified; wing without median fuscous band; hypopygium without distinct projections from one side; Hurleyella ...................................................................... 2

- Without above combination of characters.................................................. other Dolichopodidae

2 Coxa I mostly yellow; face and frons covered with dense silver pruinosity (Fig. 6); wing with vein M 1 arching greatly anteriorly on apical half (Fig. 4); halter bright yellow (Fig. 2); hypandrium nearly symmetrical, hood-like (Figs 9, 10); alkali habitats (Figs 15–20) (Idaho, Montana, Wyoming).................................................... H. salina sp. nov.

- Coxa I brown to black; face and frons covered with brownish pruinosity (as in Fig. 5); wing with M 1 slightly arching anteriorly only near apex (Fig. 3; Runyon & Robinson 2010, fig. 3); halter brown; hypandrium asymmetrical (as in Figs 7, 8), not hoodlike; habitat not noticeably alkaline....................................................................... 3

3 Surstylus apically with large membranous flange (Runyon & Robinson 2010, fig. 5) (Nearctic)........................ 4

- Surstylus with very small, inconspicuous membranous flange (Figs 7, 8, fsur) (Belize).............. H. belizensis sp. nov.

4 First flagellomere of antenna distinctly wider than narrowest part of face; males with flange of surstylus relatively narrow, tapered (Runyon & Robinson 2010, figs 5A–B) (Virginia)..................... H. cumberlandensis Runyon & Robinson

- Width of first flagellomere of antenna subequal to narrowest part of face; males with flange of surstylus spatulate (Runyon & Robinson 2010, fig. 5C) (Texas)................................................. H. brooksi Runyon & Robinson