Astictopterus inornatus, the modest sylph, is a species of butterfly in the family Hesperiidae.

It is found in South Africa in Afromontane forests from the East Cape, east along the Drakensberg foothills to the KwaZulu-Natal midlands and the coastal forests and rivers.

Adults are on wing from September to April (with a peak in January).

There are multiple generations per year.

This Hesperiinae-related article is a stub.