Bulonga trilineata Bastelberger,
1905, Ent. Zeitschr. 19: 5.
Diagnosis. This species is a deeper almost bluish grey relative to its congener,
with strong, dark postmedial fasciae on both wings that are repeated on the
underside. The build is more slender, the forewing margins more strongly convex.
Taxonomic notes. The placement of trilineata in Bulonga is open to
question. The fasciation of upper and undersides of the wings is atypical, and
the male genitalia have few features in common with schistacearia, being far
more closely typical of the major group of genera here placed in Baptini. There
is a strong angled process at the centre of the valve costa, and the setation is
more typical, including the presence of a peg-like seta almost at the valve
apex. The uncus is unusually broadly trifid, the outer processes possibly being
modified socii. The female genitalia have the ductus very short and the bursa
elongate. The latter has a small, sclerotised, horn-like appendix basally and
two opposed discs of spines subapically.
Geographical range. Borneo, Sumatra.
Habitat preference. There is a long series from G. Kinabalu collected by
Waterstradt that lacks precise data. Of five recently collected specimens, three
are from montane forest (900m and 1200m) on the limestone G. Api, Sarawak, and
two are from Brunei: lowland forest at 400m (Tutong Bedawan) and upper montane
forest at 1618m (Bukit Retak).
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