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Scaptesyle plumosus Rothschild
Scaptosyle plumosus Rothschild, 1912, Novit. zool., 19: 240.
Scaptesyle tricolor dentata Talbot, 1926, Sarawak Mus. J., 3(2): 134, syn. n.
Scaptesyle plumosus Rothschild; Holloway, 1976: 2.

Scaptesyle plumosus
(x 1.73)

The forewing border is broad, enclosing deep red, and with a single indentation in its basal margin.

Taxonomic note. The holotype of dentata was described as male but is female, not distinguishable from the female of plumosus, which may itself be merely a race of the Himalayan S. tricolor Walker. In Sumatra flies the only Sundanian member of the fourth genus of the group discussed by Holloway (1984b), Neoscaptia Hampson (type species collateralis Hampson, New Guinea = collaris Strand), a subspecies of the more easterly N. calida Walker, ssp. tenuis Rothschild & Jordan. Its conspecificity with calida and generic placement need examination but the male genitalia lack the setae characteristic of Scaptesyle. Externally it is very similar to plumosus and may prove to occur also in Borneo, but confirmation is best made on male genitalic characters rather than facies, though the hindwing borders are generally more extensive.

Geographical range. Sumatra, Java, Peninsular Malaysia, Borneo.

Habitat preference. The species has been recorded flying by day infrequently from the coast at Seria in Brunei to as high as 1660m on G. Kinabalu.

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