Oromasiphya, Townsend, 1927

Key to the species of Oromasiphya View in CoL

1. Head and thorax dorsum overall pruinosity yellow or grayish yellow; lowermost postocular setula at level of lower fourth of eye; occiput with yellow hairs; katepimeron haired; male with yellow patch of micro-hairs on ventral side of the tergites 4 and 5 ( Fig. 11 View FIGURES 9–16 ); ventral side of the male abdomen without marginal setulae on syntergite 1+2 and tergite 3............................................................................................ Oromasiphya urbanae Guimarães View in CoL

- Head and thorax dorsum overall pruinosity grayish or silvery-gray; lowermost postocular setula at upper level of gena; occiput with white hairs; katepimeron bare, or with at most four hairs on anterior fourth; male with yellow patch of micro-hairs only on ventral side of tergite 5 ( Fig. 12 View FIGURES 9–16 ); ventral side of male abdomen with marginal setulae on syntergite 1+2 and tergite 3...... 2

2. Tergite 3 without a pair of median discal setae....................................... Oromasiphya guimai sp. nov.

- Tergite 3 with a pair of median discal setae................................................................. 3

3. Apex of distiphallus composed of a non-conical dorsal tube and a pair of ventral tubes with flap-shaped lateral expansion apically; apex of distiphallus about 0.90x of cercus length ( Fig. 23 View FIGURES 17–31 )....................... Oromasiphya mineira sp. nov.

- Apex of distiphallus composed of a dorsal conical tube and a pair of ventral tubes without lateral flap-shaped expansion apically; apex of distiphallus about 0.65x of cercus length or less ( Figs. 17, 26 View FIGURES 17–31 ).................................... 4

4. Apex of ventral tubes reaching approximately halfway up dorsal conical tube; apex of distiphallus about 0.65x of cercus length ( Figs. 17–19 View FIGURES 17–31 )............................................................... Oromasiphya diamantina sp. nov.

- Apex of ventral tubes reaching approximately apex of dorsal conical tube; apex of distiphallus about 0.45x of cercus length ( Figs. 26–28 View FIGURES 17–31 )................................................................. Oromasiphya ornata Townsend View in CoL