Spialia diomus, the common sandman or Diomus grizzled skipper, is a butterfly of the family Hesperiidae. It is found in tropical Africa and south-western Arabia.
The wingspan is 27–31 mm for males and 29–33 mm for females. Adults are on wing year-round in warmer areas. In South Africa it is more common in warmer months. In cooler areas adults are on wing from August to April.[1]
The larvae feed on Hibiscus (including Hibiscus aethiopicus), Sida, Pavonia (including Pavonia burchellii), Waltheria and Hermannia species (including Hermannia diffusa, Hermannia incana, Hermannia comosa, Hermannia depressa and Hermannia cuneifolia).