Eriesthis dubiosa is a species of beetle of the family Scarabaeidae. It is found in South Africa (Limpopo).
Adults reach a length of about . They are black, with the elytra reddish. The head and pronotum are similar to those of Eriesthis guttata, but the hairs and scales are not such a bright yellow. The scutellum is squamose, and the elytra are covered with appressed hairs which can hardly be called squamose.