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Hypulia
eleuthera sp. n.
 
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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