Key to males and females of Prorops from Madagascar

1. Forewing with radial vein (Fig. 1A) ……………………………………………………………2

– Forewing without radial vein (Fig. 1B) ……………………………… P. impotens sp. nov. (♀ ♂)

2. Frontal process entirely divided into two arms, arms broadly separated from each other (Fig. 2A, G) ………………………………………………………… P. sparsa sp. nov. (♀ ♂)

– Frontal process not divided, rounded forward ………………… P. nasuta Waterson, 1923 (♀ ♂)