Tarsocera cassina, the sand-dune widow, is a butterfly of the family Nymphalidae. It is found in South Africa in the Western Cape along the coast from Lambert's Bay to Bredasdorp.
The wingspan is 35–40 mm for males and 40–45 mm for females. Adults are on wing from September/October to November. There is one generation per year
The larvae feed on various Poaceae species, including Lolium species and Brachypodium distachyum.
- ^ Tarsocera at Markku Savela's Lepidoptera and Some Other Life Forms
- ^ Woodhall, Steve (2005). Field Guide to Butterflies of South Africa. Cape Town, South Africa: Struik. ISBN 978-1-86872-724-7.