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Miliona basalis Walker
Milionia basalis Walker, 1854, List Specimens lepid. Insects Colln Br. Mus., 2: 365.
Milionia zonea Moore, 1872, Proc. zool. Soc. Lond. 1872: 569.
Milionia guentheri Butler, 1881, Ann. Mag. nat. Hist. (5), 8: 381.
Milionia latifasciata Butler, 1881, Ibid. 8: 381.
Milionia pyrozonis Butler, 1882, Ibid. 10: 375.
Milionia butleri Druce, 1882, Proc. zool. Soc. Lond. 1882: 781.
Milionia sharpei Butler, 1886, Ann. Mag. nat. Hist. (5), 18: 7.
Milionia pryeri Druce, 1888, Ent. mon. Mag. 25: 62.
Milionia ochracea Thierry-Mieg, 1907, Le Nat., 1907: 150.

Milionia basalis

Orange on the hindwing is present at the margin, enclosing circles of ground colour.

Taxonomic notes. The species occurs in a number of distinct races, the Bornean subspecies being M. basalis sharpei Butler, resembling Peninsular and Burmese specimens (M. b. pyrozona Butler) rather than Sumatran ones (M. b. guentheri Butler). There is a completely melanic specimen from Sarawak in the BMNH.

Geographical range. Japan, N.E. Himalaya, Burma, Sundaland.

Habitat preference. Bornean material has been taken in both lowland and montane habitats. It occurs at 1618m on Bukit Retak, Brunei, and at 1000m in lower montane forest on G. Mulu. Several specimens were taken at 900m in upper montane forest on G. Api, and one at 250m in dipterocarp forest at lower elevations.

Biology. The life history has been described and illustrated by Tho (1978). Oviposition is on the foliage of the host plant. The larva has a prominent orange head and anal region, the rest of the body is bluish black with two broad lateral bands of orange and several dorsal and ventral white longitudinal lines that interact with reticulate transverse boxes of white on each segment, resembling Chinese characters. The spiracles appear as dark dots within the orange bands. The mature larva lowers itself on a thread from the tree to the ground where it pupates about 5cm deep in the soil. The host plants in Peninsular Malaysia are species of Dacrydium and Podocarpus. The moth can establish in plantations of these in the lowlands.

The adult is day-flying but also comes to light at night. It visits the flowers of Leptospermum flavescens (Myrtaceae) in the mountains of Peninsular Malaysia (Tho, 1978).

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