10mm, 11mm. The male antennae are fasciculate, but not noded; there is a flap on the underside of the forewing costa that extends to the discal spot. The labial palps are damaged in the only male specimen. This species has a more regular alternation of straight, mauve and dark brown fasciae, the latter consisting of a moderate antemedial (forewing only), a broad medial (that of the forewing with the pale yellow discal mark), and a fine, irregular postmedial; this is followed by the broadest band which encloses a narrow mauve submarginal fascia within its distal edge before the wing grades mauve again to the margin. The male genitalia are similar to those of mysalis and hypenalis, but the saccular process is longer than in either, tapering, apically incurved. The saccus is relatively triangular. The female has a narrower ductus bursae than in the next species and H. nakatanii Owada (Japan). The corpus bursae is incomplete (the abdomen was damaged and glued) but is extensively scobinate with fine spicules over the basal part (scobination is infrequent in the genus); the ductus seminalis arises near the junction with the ductus bursae as in nakatanii. The facies is very similar to that of nakatanii, but in that species the saccular process of the male is shorter, straight, apically blunt.
Holotype. MALAYSIA: Sabah, Danum Valley, 170m, 4° (176)58' N 117° (176)48' E (S.J. Willott), 2° (176) understorey, Bkt. Atur Rd., DVFC, 24.viii.93, BM noctuid slide 19426.
Paratypes: 1 (slide 20071) Ulu Temburong Expedition 1978, BRUNEI, Base Camp, 350m, LP 283, m.v. light, 15.x.1978 (T.W. Harman); 1 (slide 20049) SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8, (J.D. Holloway et al.), Site 21, March, 130m, 423576, alluvial / kerangas bank.
Geographical range. Borneo, Peninsular Malaysia.
Habitat preference. Both specimens are from the lowlands, taken in both forested and disturbed localities.
11mm. The male antennae are fasciculate, but not noded; there is a flap on the underside of the forewing costa that extends to the discal spot. The labial palps are damaged in the only male specimen. This species has a more regular alternation of straight, mauve and dark brown fasciae, the latter consisting of a moderate antemedial (forewing only), a broad medial (that of the forewing with the pale yellow discal mark), and a fine, irregular postmedial; this is followed by the broadest band which encloses a narrow mauve submarginal fascia within its distal edge before the wing grades mauve again to the margin. The male genitalia are similar to those of mysalis and hypenalis, but the saccular process is longer than in either, tapering, apically incurved. The saccus is relatively triangular. The female has a narrower ductus bursae than in the next species and H. nakatanii Owada (Japan). The corpus bursae is incomplete (the abdomen was damaged and glued) but is extensively scobinate with fine spicules over the basal part (scobination is infrequent in the genus); the ductus seminalis arises near the junction with the ductus bursae as in nakatanii. The facies is very similar to that of nakatanii, but in that species the saccular process of the male is shorter, straight, apically blunt.