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Arctornis ungula sp. n.  
Redoa sp. 4; Holloway, 1976: 44.

Arctornis ungula (holotype)

23-24mm. This species is a slightly creamier white than prasioneura, with a larger black discal spot on the forewing. The frons has a black bar (or a row of three black spots) between the antennae and a pair of black spots below this, one at each end of the bar. The palps have the tips black. There are black spots on the legs as in prasioneura but these are longer. The male genitalia have a more tapering, triangular uncus with a pair of shallow, pocket-like structures basally. The valves are deep, the harpe strongly downcurved, claw-like. Only dissected specimens are included in the type series, as the next species is externally similar. There are also female specimens with similar facies but slightly larger.

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 13, February, Camp 2, Mulu, 500m, 401464, mixed dipt. for., BM lymantriid slide 1574.

1 (slide 1107) SABAH: Mt Kinabalu, Park H.Q., 1620m vii - ix.1965, Cambridge Expedition to Mt Kinabalu 1965 (H.J. Banks, H.S. Barlow & J.D. Holloway).

Geographical range. Borneo.

Habitat preference. The species has been taken both in the lowlands and the upper montane zone, the highest record being from 1930m on G. Kinabalu. It appears to be rarer than the next species.

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