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Idaea sundapilosata sp. n.  

Idaea sundapilosata
(x 1.16)

Idaea sundapilosata
(x 1.16)

7mm, putative 7-8mm. The facies is typical of the genus but males have the hind-tibial scent-pencil fawn, and also, diagnostically, a fringe of scales along the hindwing dorsum, a feature also seen in I. pilosata Warren (Queensland, New Guinea). The postmedials are moderately well defined, punctate with blackish brown on the veins, though black on the hindwing is only really conspicuous at the dorsum. The dark discal spots are prominent. In the male genitalia the valves expand towards the apex, where they are asymmetrically triangular: in pilosata they expand only slightly and are tongue-like, more densely and evenly setose. In both species the aedeagus has a single, long slender cornutus in the vesica, and there is a well developed pouch on the second sternite. The females (tentative association: slides 18530, 18532) have an immaculate corpus bursae and lateral diverticula from the ductus. The ostium is simple, transversely sclerotised.

Holotype . 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, BM geometrid slide 18499.

Paratypes: 1 general data as holotype but Site 15, February, Camp 2.5, Mulu, 1000m. 413461, lower montane forest; 1 general data as holotype but Site 22, April, W. Melinau Gorge, 150m. 421578 wet kerangas, slide 18533.

Geographical range. Borneo.

Habitat preference. The limited material suggests the species is montane, but also represented in lowland heath forest, an unusual but not infrequent distribution (Holloway, 1984a), seen also in other Idaea species (e.g. carnearia Warren). Two probable females are from 1465m on Bukit Retak and from 1000m on G. Mulu.

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