Mylothris sagala, the dusky dotted border or lemon dotted border, is a butterfly in the Pieridae family. It is found in Ethiopia, Kenya, Tanzania, the Democratic Republic of the Congo, Rwanda, Malawi, Zambia and Zimbabwe. The habitat consists of submontane and montane forests. Adults have a weak flight. They feed on the nectar of various flowers. Adults have been recorded on wing in August, September, December and from February to May.