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Hexafrenum austrocollaris sp. n.
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Hexafrenum austrocollaris  (paratype)
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23 mm. The facies is as illustrated, very similar to that of the
Himalayan collaris Swinhoe and distinguished from other Bornean species
by the more prominent subapical cream area of the forewing and the similarly
coloured zone extending the length of the dorsum. The thorax is a similar cream
colour though the patagia are more pale grey as in collaris. The species
is best distinguished by the male genitalia where there is a lobed process
arising from the centre of the valve and the lower process from the aedeagus
apex is much longer then the upper and distinctively curved. The eighth sternite
is bilobed, the lobes separated by a deep triangular cleft.
Holotype SARAWAK: Gunong Mulu Nat.
Park, R. G. S. Exped. 1977 - 8 (J. D. Holloway et al.) Site 11, February,
Camp 1 Mulu, 150 m, 385470, mixed dipterocarp forest/river, BM notodontid slide
607.
Paratypes. SARAWAK: general data as holotype, 1 Site 13, 500 m, Camp 2,
Mulu,
401464, mixed dipt. for., 2 Site 21, 130 m, W. Melinau Gorge, 423576,
alluvial/kerangas
bank, BM notodontid slide 605; 3 BRUNEI:
Temburong, L. P. 298, 300 m, 7. x. 1978
(T. W. Harman).
Geographical range. Borneo, Sumatra.
Habitat preference. This would appear to be a rare species in mixed
dipterocarp forest.
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