Metisella syrinx, the bamboo sylph or bamboes-walsertjie, is a butterfly of the family Hesperiidae.

It is a rare and highly localised species which is only known from South Africa in the eastern Cape, through southern Lesotho to the extreme south of KwaZulu-Natal.

The habitat consists of rocky areas on the summits of mountains, in montane grassland.

[3] M. syrinx is endemic to the Eastern Cape in South Africa, from Gaika's Kop (near Hogsback), and near Bedford.

[4] The larvae feed on the sole bamboo species in South Africa and Lesotho, Bergbambos.