13-14mm. The forewings are greyer than in increnulata, and the subapical
costal patch grades darker posteriorly but is twice as broad there as in the
similar bosca Swinhoe. In increnulata the distal border of the
subapical patch is smoothly concave, but in boscoides it is irregular,
obtusely indented. The fasciae are more clearly defined than in bosca, narrower,
darker, with the antemedial and postmedial edged more distinctly paler basally
and distally respectively. Where the postmedial borders the subapical patch it
is straight not obtusely angled, and more oblique. The male genitalia are close
to those of bosca.
Paratypes.
2,
2
as holotype; 1 BORNEO:
Sarawak, Wallace, 74-94.
Geographical
range. Borneo.
Habitat
preference. Most
of the records by Holloway (1976) refer to this species, found from 1200-2000rn
on G. Kinabalu. The species has also been taken in lowland forest in Brunei.
(paratype) 
13-14mm. The forewings are greyer than in increnulata, and the subapical
costal patch grades darker posteriorly but is twice as broad there as in the
similar bosca Swinhoe. In increnulata the distal border of the
subapical patch is smoothly concave, but in boscoides it is irregular,
obtusely indented. The fasciae are more clearly defined than in bosca, narrower,
darker, with the antemedial and postmedial edged more distinctly paler basally
and distally respectively. Where the postmedial borders the subapical patch it
is straight not obtusely angled, and more oblique. The male genitalia are close
to those of bosca.