The mimallonid genus Roelofa is revised. It is the only genus belonging to the recently erected subfamily, Roelofinae.Both sexes and genitalia are figured for all previously described species in the genus, and all are redescribed. The species Roelofa maera stat. rev. is no longer considered a synonym of R. narga based on morphological differences. We describe a new species from Guatemala: R. monzoni St Laurent, Herbin & Kawahara, sp. n. which is most similar to the widespread Central American R. hegewischi.