Zeuzera saikehi sp. n.

♂♂ 17mm. This is the smallest Bornean species and differs from the other smaller ones such as conferta Walker or coffeae Nietner in having the hindwing with a distinct tornal lobe somewhat as in caudata Joicey & Talbot, with the distal margin concave anterior to it. The wings have an unusual yellowish brown tinge over their basal halves. The blackish striae are relatively broad, somewhat as in lineata Gaede, but less numerous, and these are very faint on the hindwing, which is distinguished by a large blackish triangular mark on the anterior side of the tornal lobe. The genitalia have the uncus relatively long and slender as in caudata, but the valves are more ovate, less evenly rounded apically; the aedeagus is shorter.