Mylothris rueppellii, the Rüppell's dotted border or twin dotted border, is a butterfly of the family Pieridae. It is found in most of Africa, south of the Sahara. The wingspan is 48–55 millimetres (1.9–2.2 in) for males and 50–56 mm (2.0–2.2 in) for females. Adults are on wing year-round, with peaks in October and from late February to April in southern Africa. The larvae feed on various Loranthaceae species, including Loranthus, Tapinanthus oleifolius and Tapinanthus rubromarginatus.

It is named after the German naturalist Eduard Rüppell, who had travelled in Africa in 1830.

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