View Image Gallery of Tribe Arctornithini n.

Arctornis excavatus sp. n.  

Arctornis excavatus (paratype)

15-16mm. The wings are satiny white, with mottled reflective areas produced by extensive areas of broad, shiny scales. The discal spot is faint, if present, and the fringes are often greyish. The frons has a broad rufous bar that extends from a line just at the antennal bases to well below the upper level of the eyes. The palps are paler rufous. The legs are only weakly spotted. The male genitalia have the uncus rather setose, rounded, but not bilobed and rugose as in bilobuncus. The valves are somewhat rectangular, but with the distal margin excavate between a rounded ventral angle and a distinctively thorn-like dorsal angle. The harpe is slender, setose and slightly sinuous, as long as the valve.

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 11, February, Camp 1, Mulu, 150m, 385470, mixed dipt. f./ river, BM lymantriid slide 1577.

Paratypes:3 as holotype, slides 1598, 1626; 4(slides 1589, 1616) general data as holotype but Site 15, February, Camp 2.5, Mulu, 1000m, 413461, lower montane forest; 1 (slide 1611) as previous but Site 14; 1 general data as holotype but Site 21, March, W. Melinau Gorge, 130m, 423576, alluvial/kerangas bank.

Geographical range. Borneo.

Habitat preference. The material is mostly from hill dipterocarp forest and lower montane forest on G. Mulu.

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