Trimen’s acraea (Acraea trimeni) is a butterfly of the Nymphalidae family. It is found in only in the arid savannah in the northern Northern Cape and the western part of the Free State. The wingspan is 43–49 mm for males and 45–55 mm for females. Adults are usually on wing from October to March with a peak in late October. There might be two or continuous generations per year.