''Stygionympha vansoni'', or Van Son's brown, is a butterfly of the family Nymphalidae. It is found in South Africa, in

Northern Cape The Northern Cape is the largest and most sparsely populated province of South Africa. It was created in 1994 when the Cape Province was split up. Its capital is Kimberley. It includes the Kalahari Gemsbok National Park, part of the Kgalagadi T ...

from the Kamiesberge to the Springbok area. The wingspan is 36–38 mm for males and 38–40 mm for females. Adults are on wing from August to October. There is one generation per year. The larvae probably feed on

Poaceae Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns an ...

grasses.

References

Butterflies described in 1953 Satyrini Butterflies of Africa {{Satyrini-stub