Rhytidometopum Hebard

1a. Subgenital plate with two styles and absent interstilar process (Figs. 2 c-e)……………..……….….............………………………………………………….. R. megalopterum Hebard

1b. Subgenital plate with both styles well developed and an interstilar process (Figs. 1i, 2e, 4)...................................................................................................................................................2

2a. Pronotum without two longitudinal bands (Fig. 2a). Tegminae and wings with two white bands in the discal area (Fig. 2a)…………...………….… R. albomarginatum Princis

2b. Pronotum with two longitudinal bands (Fig. 1c). Tegminae and wings without white bands in the discal area (Fig. 1e)…………………………………………………..…....…….3

3a. Interstilar process without basal spine (Figs. 1i, j). Pronotum with black longitudinal bands (Fig. 1c)…………………………………………………………….…... R. chiripa sp. n.

3b. Interstilar process with a basal spine (Fig. 4). Pronotum with brown longitudinal bands… …………………………………………………………………............……. R. dissimile Princis