Arctornis rugosacculus Holloway sp. n.

♂ 14mm. The facies is similar to that of brunnescens, including the frons and palp colour, but the male genitalia are distinctive. The harpe is more slender and distinctly downturned at the apex. The sacculus has a diagnostic, rugose, leaflike plate arising from it.

Holotype ♂

BRUNEI: LP 298, Temburong, 300m, 5.x.1978 (T.W. Harman), BM lymantriid slide 2158.

Geographical range

Borneo.

Habitat preference

The only specimen is from lowland dipterocarp forest.

Genitalia: