Twenty specimens of Tinissa collected by the Danish Noona Dan Expedition (1961–62), the Royal Geographical Society Expedition to Gunung Mulu (1978) and by two individual collectors are recorded. Two new species are described: Tinissa yaloma from New Britain and T. classeyi from Borneo. A revised phylogenetic classification of Tinissa incorporating the new species is proposed. A critique is presented of Kuznetzov & Stekolnikov's classification of the Tineoidea and their alliance of the subfamilies Nemapogoninae and Scardiinae is questioned. The genital musculature of Tinissa is described. The affinities of the Tinissinae are debated and it is concluded that Tinissinae and Scardiinae form a monophyletic group, the Tinissinae being either the sister-group of the Scardiinae or forming a monophyletic group within the Scardiinae.