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Bosara bursacristata sp. n.

Bosara bursacristata
(paratype) (x 1.47)

7-8mm. This species resembles B. modesta Warren but is much paler, the male lacking the strong white fleck between the angles of the forewing postmedial. The male costa is only weakly bowed and lacks any scale crest. The fasciation is neat and regular, darker brown on the pale brown ground, the angles of the postmedials rather rounded, with a paler edging distally. The aedeagus is larger, tapering more from a bulbous base. The octavals are simple, separate, apically acute, whereas in modesta they form a broadly triangular plate, apically convergent and bilobed. The female genitalia have short, narrow ductus and a large, pyriform bursa more or less full of delicate spining that is more concentrated in a longitudinal crest: in modesta the ductus is broader, the base of the bursa sclerotised, somewhat hooked, and the spines are not concentrated into a forest.

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 14, January, Camp 2.5, Mulu 1000m. 413461, [lower montane forest], BM geometrid slide 19016.

Paratypes: 1 (slide 19004) as holotype but Site 3, January, Camp 4, Mulu 1780m, 453463; 1 (slide 19015) SABAH: Bundu Tuhan, 1200m, vii-ix-1965 Cambridge Expedition to Mt Kinabalu 1965 (H.J. Banks, H.S. Barlow & J.D. Holloway); l (slide 19005) SABAH: Mt Kinabalu, Kamborangoh, 2110m, general data as previous; 1 (slide 19006) SABAH: Mt Kinabalu, 5500ft, 23-24.1.1976 (E.W. Classey) ; 2 (prep. 6467) SABAH (N. Borneo): Env. de Ranau, Kundasang, 1200m 1 /2.iii.1987 (C. Herbulot) (Colln Herbulot).

Geographical range. Borneo.

Habitat preference. The species has been taken in both lower and upper montane zones over an altitude range of 1000m to 2110m. Only dissected material is given type status.

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