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Teulisna quadratella sp. n. 

Teulisna quadratella (paratype)
(x 1.30)

, 10-12mm. Both sexes have a prominent square black area in the centre of the forewing, an almost uniform grey marginal area beyond the paler edging to
the black, and a hindwing that is grey except for a basal pale zone that extends to one third. The facies of atratella is somewhat similar, but the black area is smaller, more strongly produced anteriorly on its basal border. The male genitalia also suggest affinity to atratella, particularly in the shape of the processes of the valve: a hooked saccular process and a club-like costal one. However, the main lamina of the valve is broader, more symmetric apically, the saccus and structures within it are larger, better developed, and the aedeagus and its vesica are half as large again, and the cornuti more massive.

Holotype SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.), Site 23, April, W. Mesilau Gorge, 250m. 430558, FEG 4, limestone forest, BM arctiid slide 2634.

Paratypes: 1 as holotype; 2 , 1 general data as holotype but Site 8, February, Camp 1, Mulu, 150m, 385470, mixed dipt. for.; 1 BRUNEI: 300m, Ulu Temburong, rainforest (H.S. B[arlow]) Oct. 1978.

Geographical range. Borneo.

Habitat preference. The species is infrequent in lowland dipterocarp forest.

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