Diagnosis. The male antennae are bipectinate as in Bocana Walker species (p. 105), but M3 and CuA1 in the hindwing are connate. The species is much larger, a rich dark brown, with very diffuse and obscure darker fasciation amid a slight mauve irroration on the forewing that is concentrated to some extent in a narrow, irregular line that edges the submarginal distally. The forewing has an inconspicuous yellowish discal spot approximately centrally.
Taxonomic note. The species is transferred to Hadennia on the basis of genitalia characters and presence of a costal flap on the underside of the male forewing; the forewing reniform is weakly paler. In the male, the valves have a bilobed saccular process associated with a weak external corema. Between their bases is the hair-bearing spherical structure seen in all Hadennia. The corematous area on sternite 8 is shallow. The female genitalia are atypical of those of Bocana.
Habitat preference. The holotype male is from G. Murud, and a second specimen from about 1500m on G. Poeh was mentioned in the original description. Two further specimens have been recorded from 1620m on G. Kinabalu.
