Yashmakia bigrisea sp. n.
16mm. The species resembles a large Y. suffusa but is
distinguished externally by the broad grey postmedial of the forewing, oblique
over the dorsal half and strongly curved round the discal spot anteriorly. This
is edged distad by a much darker, diffuse, narrower band, and straight bars of
the same dark colour occur across the forewing tornus, connecting the postmedial
band to the margin apically and centrally, and, on the hindwing, subbasally and
from apex to tornus. The uncus and valves are typical of the genus, though the
latter are narrow, the costa with a slight excavated process at one third. The
aedeagus vesica bears a single row of numerous very long cornuti.
Holotype . BRUNEI: Kilanas Agr. Stn.,
Oct. 1972, at MV light, (D.J. McCrae), BM geometrid slide 12989.
Paratypes: 1 BRUNEI: 15m,
Telisai, Sandy heath forest and Gymnostoma, 13.12.1979.
(Lt. Col. M.G. Allen); 1 BRUNEI:
Telisai, 5m, 11.iv.1981 (T.W.
Geographical range. Borneo, Sumatra, Bali.
Habitat preference. The specimens are from the lowlands except that from
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