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Arctornis excavatus
sp. n.
Arctornis excavatus
 (paratype) |
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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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