Encrasima insularis is a moth in the Autostichidae family. It was described by Butler in 1880. It is found in Madagascar. Adults are dark fuliginous brown, the forewings crossed before the middle by a broad, pale-edged, golden-ochreous belt, which does not quite reach the costal margin. There is a small, ocelloid, black-brown spot, margined with stramineous, beyond the cell, followed immediately by an externally blackish-bordered, curved, golden-ochreous discal band. The apex and outer margin are whitish-brown and the marginal line is black. The hindwings are paler than the forewings and without markings.