The species resembles B. undulosa in general facies but the
wing markings are dull, ochreous, pale brown, rather than grey,
also the thorax; the pale area of the hindwing is more extensive.
In the male
genitalia the valves are basally narrower than in undulosa and thus more evenly
tapered overall. The cubile arms terminate in an angled, rather than rounded,
sclerotisation. The ventroapical spur from the aedeagus is larger and more
evenly curved and tapered.
Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) BM
1978-208, Site 26, April, G. Api Pinnacle, 1200m, 428545, open scrub, MV, BM
lasiocampid slide 989.
general data as holotype but Site 25, April, G. Api, 900m, 427550, lower montane
300m, Ulu Temburong rain forest, 24.4.81 (Lt.
Col. M.G. Allen).
preference. During the Mulu survey six were recorded from montane forest on the
limestone G. Api and six from regenerating alluvial forest in the lowlands. The
Brunei specimens were from dipterocarp forest.
Biology. This is
not known but possibly similar to that described for B. undulosa in the generic
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