Nessaea hewitsonii, the Hewitson's olivewing, is a species of butterfly of the family Nymphalidae. It is common in a broad range of the Amazon basin including the eastern slopes of the Andes mountain range. It is found in high evergreen tropical forest, semi-deciduous tropical forest, and riverine forest.
The length of the wings is 33âÂÂ40 mm for males and 36âÂÂ41 mm for females.