Diagnosis. This and the remaining species have much more uniformly pale forewings than kurosawai. The reniform is oblique, narrow, and the postmedial is most conspicuous near the costa where it forms a narrow angle with it to run obliquely distad more or less straight over 2mm before it turns with a slight angle into the curvature round the discal zone, more gentle than in kurosawai and extending more towards the dorsum. The holotype male of fonteialis lacks its abdomen but shares with the specimens to hand a narrow forewing reniform and a rather clouded margin to the hindwing. The male genitalia are broad, uniquely lacking a saccus (but the vinculum is broad) and having a triangular uncus. The valves are reduced to strongly curved, digitate processes. The aedeagus has a few short spines apically and coarse scobination in the uneverted vesica. The female genitalia have relatively short ovipositor lobes and the eighth segment is also short, rugose. The ostium is very broad, sclerotised, and flanked by sclerotised pockets that presumably receive the apices of the male valves in copulation. The corpus bursae is ovate, unmodified, with the two clusters of spines centrally and with a short appendix bursae at one quarter. The spines of the signa are relatively small.
Taxonomic note. The association of the sexes was achieved from examination of Sulawesi material (slides 19965, 19966) where the species are far fewer in number.
Geographical range. Borneo, Sulawesi.
Habitat preference. No material with precise data was available except that from Semongok where a patch of forest occurs within largely cultivated lowlands. Material from Sulawesi was also from cultivation and open habitats.
