Diagnosis. This is one of the smaller Bornean species, and is distinguished particularly by the pinkish grey medial area of the forewing, defined by a diffuse black medial fascia and a fine, black, angled submarginal that arises close to the medial on the costa and dorsum, but runs sharply away from it anteriorly to curve round the discal mark and then converge on it again more gently towards the dorsum. This band is much narrower and darker on the hindwing, but similar in form.
Taxonomic note. The holotype (OUMNH no. 1817) has lost its abdomen and is rather worn, but the facies match that of the series of both sexes identified as vexataria and illustrated here. This series is not conspecific with H. nigrifascia Hampson stat. rev. (Sri Lanka), listed as a synonym of vexataria in Poole (1989). The valves of the male genitalia are much longer and broader in nigrifascia, with triangular flaps in the distal part.
Geographical range. Borneo.
Habitat preference. All material is from lowland forest, the highest record being from about 600m.
