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Hypulia eleuthera sp. n.

Hypulia eleuthera

14-15mm. This and the next species both have a strongly defined postmedial fascia on both wings, and a more diffuse antemedial on the forewing. The antemedial in eleuthera is more or less straight in Peninsular specimens but curved in Bornean ones. There is no strong sexual dimorphism in eleuthera, with both sexes resembling females of the next species, except the hindwing postmedial is slightly curved. The genitalia are distinctive. The male valve lacks coremata; the costa has a central, rather rectangular lobe and a distal rounded one. The pseudouncus is slender, broadening and bilobed apically. In the female the narrow corrugate basal part broadens gradually with the spherical distal part of the bursa which is immaculate. Bornean material has the pseudouncus slightly longer and the dorsal margin of the valve costa somewhat more deeply excavate.

The specific epithet is a manuscript name applied to this species by L.B. Prout.

Holotype . Selangor, F.M.S., Kuala Kubu, Bukit Kutu 3400ft. Aug 1915, BM geometrid slide 13008.

Paratypes: 1 as holotype; 1 MALAY STATES, Bukit Kutu, 3300ft. vii. 1928 (A.R. Sanderson).

Geographical range. Peninsular Malaysia, Singapore, Borneo and probably Sumatra.

Habitat preference. Bornean material is from lowland forests on acid soils: wet heath (kerangas) forest in the G. Mulu National Park, Sarawak; more swampy forest types in Brunei (Seria, Badas). The species is rare.

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