Arctornis malleuncus sp.
15mm. The forewings are satiny white without
rippling. The bar to the frons and the palps are pale brown, the former with a
strongly concave ventral boundary. The legs are rather damaged but do not appear
to be strongly spotted. The male genitalia have a broad, rounded, slightly
sclerotised uncus, though this is not as pronounced as in bilobuncus, and
the head of the uncus is not bilobed but constricted subapically to give a
slightly hammer-like effect. The valve is rectangular, the harpe, straight,
slender, tapering to a point just beyond the valve margin, and is increasingly
scobinate from half way onwards. The aedeagus has prominent lateral ‘horns’.
SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site
8, February, Camp 1, Mulu, 150m, 385470, mixed dipt. for., BM lymantriid slide
BRUNEI, 300m, Ulu Temburong, rainforest, 30.6.1979 (Lt. Col. M.G. Allen) BM
lymantriid slide 2161.
specimens are from lowland dipterocarp forest.
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