Key to adults of Domodon species

1 Tergite 4 largely or entirely black or dark brown (Figs 1, 6, 19). Other tergites also partly dark (Figs 1, 6, 19). Vertex entirely black or dark brown, with or without metallic hue (Figs 3, 7, 18)................................................ 2

- Tergites entirely yellowish brown, although differences in length, arrangement and colour of the pile create the impression of a pattern of vaguely delimited dark median and lateral maculae on the tergites (Fig. 10). Vertex largely yellowish brown with some small dark brown markings (Figs 12–14)............................................. D. inaculeatus sp. nov.

2 Antenna with basoflagellomere approximately as long as scape (Fig. 4). Tergite 3 partly yellowish, at least along posterior margin (Figs 1, 24, 27)................................................................................. 3

- Antenna with basoflagellomere more than three times as long as scape (Fig. 17). Tergite 3 entirely blackish (Figs 19, 26)....................................................................................... D. sensibilis sp. nov.

3 Face pale yellow without black vitta. Femora brownish with pale yellow tip............... D. peperpotensis Reemer, 2014

- Face pale yellow with brown median vitta (Figs 3, 7). Femora entirely brownish, without yellow marks................. 4

4 Yellow markings along posterior margin of tergite confined to posterior half of tergite (Figs 1, 24). Surstylus dorsally with a row of short pointed setae (Fig. 20)....................................................... D. caxiuana sp. nov.

- Yellow markings along posterior margin of tergite 3 medially connected with yellow markings along anterior margin of tergite (Fig. 27). Surstylus dorsally without a row of short pointed setae (Fig. 23).................... D. zodiacus Reemer, 2013