The Eugoa Walker group of genera
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Eugoa trilacunata sp. n.

Eugoa trilacunata(paratype)
(x 1.56)

9-12mm, 9-11mm. The forewings are almost entirely obscured with dark grey, leaving three areas of pale grey with semicircular to circular interior boundaries basally and at one-third on each of the costa and dorsum. The characteristic submarginal fascia is usually evident as a darker element in the more distal part of the dark grey. The male genitalia place the species close to aequalis, but the uncus is distally narrower, less hammer-like, but centrally constricted, with setae directed laterally rather than dorsally. The tegumen shoulders are narrower, more laterally produced, and the more ventral processes are also very narrow rather than trapezoid with an irregularly serrate edge.

Holotype . Elopura [Sandakan], BORNEO (Pryer), BM arctiid slide 5060.

Paratypes:1 (abdomen damaged) Labuan, BORNEO (Pryer); 1 N. BORNEO (Pryer); 1 BRUNEI: 300m, Ulu Temburong, rainforest, 9.2.80 (Lt. Col. M.G. Allen); 1 BRUNEI: 30-60m, Labi, lowland forest and secondary veg.,15.12.1979 (R. Fairclough); 2 (slide 5058) BRUNEI: 1670m, Bukit Pagon, montane forest, Feb 1982 (Allen & Harman); 1  Bukit Pagon, L.P. 308, 1680m, BRUNEI, 20.ii.1982 (T.W. Harman).

Geographical range. Borneo.

Habitat preference. The populations, judging from the small number of specimens taken so far, appear ecologically disjunct between the lowlands and the upper montane zone.

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