TRIBE NYGMIINI n.
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Sundaroa cheyi sp. n.  


Sundaroa cheyi (paratype)


10-13mm. The facies is much as in flaveofusca but the hindwing marginal orange is in a narrower, less semicircular band. The forewing has a more distinct but irregular, oblique paler band, with the discal spot rather obscured by the heavier black scaling distal to the oblique band. The male genitalia differ from those of flaveofusca in the slightly larger, less sinuous uncus, with smaller but more acute basal processes. The spines at the apex of the aedeagus are less robust.

Holotype SARAWAK: 1910-95, 4th mile, Rock Road, 6.5.1909, BM lymantriid slide 2467.

Paratypes:1 same data as holotype but different label; l SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 24, April, W. Melinau Gorge, 270m, 430558, FEG 4, limestone forest; l BRUNEI: 30-60m, Labi, lowland forest, 4.8.79 (Lt. Col. M.G. Allen); l SARAWAK: 300m, nr. Geronggang Camp, Sg. Jela, tributary of Sg. Engkari, Lanjak-Entimau Wildlife Sanctuary, 8.vii.1998 (Chey Vun Khen), in Sarawak Forest Research Centre Colln.

Geographical range. Borneo, ?Java (slide 2468).

Habitat preference. This is a rare species of lowland forest, possibly day-flying and nocturnal.

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