Willema willemi, the netted sylph, is a species of butterfly in the family Hesperiidae.

It is found from South Africa (Transvaal), Botswana, and Zimbabwe to Kenya, Uganda, and Somalia.

The habitat consists of savanna (especially along streams fringed by trees that provide an almost closed canopy) and densely wooded clumps of bush.

Adults are on wing from December to May (with a peak from February to March).

[3] The larvae feed on Setaria species.