Cassionympha cassius

Cassionympha cassius, the rainforest brown, is a butterfly of the family Nymphalidae. It is found in South Africa, it is common in cool and moist forests, coastal and riverine bush and kloofs (gorges in the Western Cape along the western coast through the Eastern Cape to KwaZulu-Natal, the eastern slopes of the escarpment through Eswatini and Mpumalanga to the Soutpansberg in Limpopo.

Rainforest brown
In Adalbert Seitz's Fauna Africana
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Nymphalidae
Genus:	Cassionympha
Species:	C. cassius
Binomial name
Cassionympha cassius (Godart, [1824])[1]
Synonyms
Satyrus cassius Godart, [1824] Pseudonympha hyperbioides Wallengren, 1857

The wingspan is 34–38 mm for males and 36–42 mm for females. Adults are on wing from September to May.^[2]

The larvae feed on Poaceae species, including Pentaschistis capensis and Juncus capensis.