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Hyalospectra dierli sp. n.  

Hyalospectra dierli (holotype)

9-10mm. The facies is typical of the western members of the genus, though the darker markings are pale grey rather than fawn, and darker areas are brown-grey. The fasciae are slightly more regular, transverse. The dark brown-grey marks are few, diagnostically along the forewing costa and just distal to the hyaline patch between M3 and M2, being an enlarged component of a postmedial row of darker spots in the spaces. This row of marks is present on the hindwing, though that between M3 and M2 is only slightly larger than the rest. The male genitalia have the structures on the tegumen broad, rather rectangular, without long socii. The valves are rather rounded, their interior processes consisting of two spurs not seen in labi or altipustularia: in pustularia they consist of long, slender spines, the left one twice the length of the right. The saccus is broader, rounder than in these two species.

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 15, February, Camp 2.5, Mulu, 1000m. 413461, lower montane forest, BM drepanid slide 2096.

Paratypes: 1 as holotype; 1 general data as holotype but Site 23, W. Melinau Gorge, 250m. 430558, FEG 4, limestone forest.

Geographical range. Borneo, Peninsular Malaysia.

Habitat preference. The material is from both lowland and lower montane forest, with three (one damaged and not listed above) out of four from the latter.

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