TRIBE LITHOSIINI
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Poliosia concolora sp. n.  


Poliosia concolora
(x 1.30)


, 10-11mm. Externally the species is very similar to pulverea, but is distinguished by an androconial patch concolorous with the wing and by the male genitalia. The saccular process of the valve is less strongly hooked, and the saccus is bulbous rather than triangular. The aedeagus vesica has two, rather than three, spiny plates, and these are more finely serrate. The third plate in pulverea is very large, elongate, densely and coarsely spined.

Holotype . SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.), Site 20, Mar.-Apr., W. Melinau Gorge, 150m. 422577, FEG3, kerangas, BM arctiid slide 4700.

Paratypes (all general data as holotype): 5 as holotype; 1 Site 8, February, Camp 1, Mulu, 150m, 385470, mixed dipt. for.; 1 (slide 5184) BRUNEI: 3m, Seria, secondary and coastal veg., 30.12.78 (Lt. Col. M.G. Allen).

Geographical range.
Borneo, N.E Himalaya (slide 5443).

Habitat preference.
This species is, like pulverea, rarer than marginata but also mostly restricted to lowland forests, taken particularly in wet heath (kerangas) forests during the Mulu survey. One specimen was taken in disturbed coastal forest.

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