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Biston
insularis Warren
Blepharoctenia insularis Warren,
1894, Novit. zool., 1: 428.
Blepharoctenia arenosa Warren,
1894, Novit. zool., 1: 429, syn. n.
Buzura eximia Swinhoe, 1902, Ann. Mag. nat. Hist.(7), 9:
417.
Buzura insularis illucescens Prout,
1928, Bull. Hill
Mus. Witley, 2:146.
Buzura insularis Warren; Barlow, 1982: 132.
Diagnosis. B. insularis may be distinguished from Bornean material of the
next two species by the blackish suffusion of the hindwing (on both surfaces).
The basal black markings of the forewing are more distinctly double. The
forewing postmedial is more entire and stronger at the dorsum on the underside.
Taxonomic note. The male genitalia and facies of arenosa are similar to those of insularis
from the rest of Sundaland, though typical Nias material of the latter is
less heavily fasciated on the forewing.
Geographical range. Sundaland.
Habitat preference. The species is abundant in a range of lowland forest
types and is rarely encountered above 1000m.
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