TRIBE ARCTORNITHINI n.
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Arctornis asymmetricus sp. n.


Arctornis asymmetricus (holotype)


12-14mm. The forewings are a roughened satiny white with a faint, rounded, black discal spot. The frons, palps and upper half of the foretibia are dark rufous brown. The male genitalia have a strong asymmetry, but this does not appear to be homologous to that of phrika and allies (See A phrika Collenette comb.n ), as the harpe on each side lies flat against the valve and has a massively swollen base. That on the right is much larger than that on the left, and both are acute apically. Both valves have a serrate fringe along the costal margin that becomes more pronounced towards the apices.

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 14, February, Camp 2.5, Mulu, 1000m, 413461, lower montane f., BM lymantriid slide 1602.

Paratypes: 1 (slide 1641) as holotype but Site 15; 1(slide 1607) general data as holotype but Site 20, Mar.-Apr., W. Melinau Gorge, 150m, 422577, FEG 3, kerangas.

Geographical range. Borneo.

Habitat preference. The few specimens are from lowland kerangas forest and from lower montane forest.

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