Tridrepana diluta Warren, 1897, Novit. zool., 4:18.
Tridrepana subobliqua Warren,
1897, Ibid., 4:18, syn. n.
Callidrepana takumukui Matsumura,
1927, J. Coll. Agric. Hokkaido Imp. Univ., 19: 45.
Strepsigonia diluta Warren;
Watson, 1957: 411.
Strepsigonia diluta fujiena Chu
& Wang, 1987, Sinozoologica 5:113.
Strepsigonia diluta takamukui Matsumura;
Inoue, 1988, Tinea 12: 126.
Diagnosis. This is a pale ochreous fawn species with forewings simply falcate in
both sexes. The fine fasciation is more clearly defined than in other Bornean
species, the hindwing postmedial straighter over its posterior half. The
forewing apex and fringes of both wings are darker. On the underside there are
broad, dark postmedials.
Taxonomic notes. The genitalia of specimens through the range of the species are
inseparable, hence the synonymy above: diluta has page priority.
Geographical range. N.E. Himalaya, China, Taiwan, Java, Sumatra (ZSM),
Peninsular Malaysia, Borneo, Seram.
Habitat preference. The species is rare with only four specimens recorded
in recent surveys: three from lower montane forest at 1000m on G. Mulu; one from
1618m on Bukit Retak, Brunei.
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