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Problepsis
borneamagna sp. n.
Problepsis korinchiana Rothschild
sensu Holloway 1976: 64.
Problepsis
borneamagna 
(paratype) |
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17-19mm. In facies this species most resembles apollinaria of the
other Bornean species but is more heavily marked, with a longitudinal black
streak in the forewing ocellus but less silver edging along the diffuse pale
brown medial band continuing to the tornus. The ocelli on both wings are
somewhat broader. In P. korinchiania Rothschild, a montane Sumatra
species, the markings are darker still, the postmedials more irregular in course
to skirt larger elements in the submarginal row of grey patches. The male
genitalia are similar to those of apollinaria but the aedeagus is much
shorter, and the interior margin of the tegumen is lined with spines that are
absent in apollinaria. In korinchiana the aedeagus is very
slender, as are the two valve processes, but the uncus is very much broader than
in the Bornean species. The spines on the interior of the tegumen are more
slender, directed away from the uncus rather than towards it. The facies and
male genitalia indicate a close relationship to P. magna Warren (New
Guinea), though the wing markings are generally slightly darker. The male
genitalia of magna have fewer spines lining the interior of the tegumen,
the shape of which is more like a gothic arch, and the exterior is more square-shouldered. The saccus is more deeply bilobed. The aedeagus apex of magna is
also more complexly lobed.
Holotype . SABAH: Mt. Kinabalu 5000ft 3.5.1973 (K.M. Guichard) BM geometrid
slide 17775.
Paratypes: 1 SABAH: Mt Kinabalu, Park HQ., 1620m vii-ix.1965, Cambridge Expedition
to Mt Kinabalu 1965 (H.J. Banks, H.S. Barlow & J.D. Holloway) BM
geometrid slide 9003; 1 BRUNEI, 1670m, Bukit Pagon, montane forest, Feb. 1982 (Allen
& Harman) BM geometrid slide 19172; 1 BRUNEI: 1618m Bukit Retak,
montane forest, 14.9.1979, (Lt. Col. M.G. Allen):2 SARAWAK: Gunung Mulu
Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 25, April,
G. Api, 900m 427550 lower montane forest; 1 SARAWAK as above but Site 1,
January, Camp 4, Mulu 1790m 452463 [montane forest]; 2 BORNEO: Sabah, Bukit
Monkobo (Camp 1, 1200m and summit, 1775m) viii.1987 (A.H. Kirk-Spriggs)
Habitat preference. Most material has been taken in upper montane forest
but two specimens were collected from lower montane forest at 900m on the
limestone G. Api.
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