Diagnosis. This species is slightly larger than purpuralis Holloway, with a darker, rougher-looking appearance to the wings, the fasciation basal to the submarginal being obscured rather than faintly evident, dentate, against a paler, browner ground with a purplish tinge in places. The white submarginal is usually more complete in purpuralis, the subdorsal white lunule of the forewing being in line with the rest of the marks or only slightly set basad; it is more obviously set basad in punctilinea. The obtuse angle towards the tornus on the hindwing submarginal is also more conspicuous in purpuralis. In both species the forelegs are heavily scaled distally in a lens-shaped mass and have two greyish hair-pencils basal to this. In the male genitalia, punctilinea has the uncus dorsally more strongly curved subapically, being therefore broader at that point; the saccus is narrower; the valves are longer and narrower, but the saccular process is similar. In purpuralis the anellar tube is not spiny, but the juxta is more elongate, with convergent submarginal bands of spines laterally; the aedeagus is more slender, and the vesica is relatively much smaller.
Geographical range. Borneo.
Habitat preference. The species was described from a male from 1000m on G. Poeh. A series of fourteen males (seven retained) has been taken at 1618m near the summit of Bukit Retak in Brunei, mostly in 1979, but one was taken in 1981.
