Stygionympha robertsoni

Robertson's Brown (Stygionympha robertsoni) is a butterfly of the Nymphalidae family. It is found in South Africa, in the northern Cape, the southern part of the Orange Free State, the northern part of the western Cape and the eastern Cape.

The wingspan is 38–40 mm. Adults are on wing from August to March. There are probably multiple generations per year.

The larvae feed on Poaceae grasses. Larvae have also been reared on Ehrharta erecta.