1. Anterior apical cross-veins of forewings lined with stripes of dark infuscation (Fig. 199f)............................ 2

- Anterior apical cross-veins of forewings not lined with stripes of dark infuscation................................... 3

2. Hindwings with a round mark around base of Ms2 and several dark stripes across apical third of wing (Fig. 197g)....................................................................... R. jacobsoni sp. nov. (R. formosana group), p. 69

- Hindwings with 2 dark spots around base of Ms2, but without dark stripes (Fig. 199g)........................................................................................ R. transversolinea Melichar (R. formosana group), p. 70

3. Forewings colourless with some dark spots in basal quarter, at apex of Cu, and around last subcostal sector; apical part of male aedeagus with two processes, each bearing 3 small teeth at the end (Figs. 218m, p).................................................................................................... R. tridentata sp. nov. (R. ornata group), p. 84

- Forewings lightly infuscated along most veins, without dark spots (Fig. 253f)........ R. venosa Distant (ungrouped), p. 105