The Throana group of genera
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Margana tenuilinea Swinhoe comb. n.
Rhesala tenuilinea Swinhoe, 1905, Ann. Mag. nat. Hist. (7), 16: 623.

Margana ?tenuilinea

See the generic description. The wings are dull medium brown with fine, irregular, dark fasciae as illustrated. The medial fascia, though more diffuse, is usually the most conspicuous.

Taxonomic note. The two described species in the genus have identical facies, but the male genitalia show differences in the processes of the valves, those of seclusalis being more obliquely aligned at their distal extremities. The processes of the tegumen are more strongly developed in seclusalis, the uncus is shorter, and the arms of the transtilla are longer and narrower. The aedeagus vesica has five clumps of spines compared with two in tenuilinea. The female of seclusalis is very similar to that of tenuilinea, though the corpus bursae is slightly shorter, and there is a more marked constriction at its junction with the short ductus. Males from Borneo, Peninsular Malaysia and China are unknown. The Bornean female has genitalia similar to those of tenuilinea except the bursa is less elongate and less sclerotised, more ovate, and the vestigial apodemes of the eighth segment are close to the ostium. There is thus probably a distinct species in Borneo, but material is too limited to allow confident description of such.

Geographical range. Sumatra, ?Borneo.

Habitat preference. Five specimens were recorded at 170m near the Danum Valley Field Centre in Sabah, four in primary forest and one in logged forest. Only one female voucher was available for study.

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