The Saroba group of genera
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Tamba occidinawa sp. n.
16-17mm. This species resembles T. dinawa Bethune-Baker (New Guinea, Seram) in its uniform, dull brown colour with paler postmedials, that of the forewing roundedly angled, and enclosing a large, pale reniform. Some specimens have a paler band just distal to the postmedials. There are darker brown marks on the hindwing at the dorsal end of the submarginal and discally. T. dinawa is slightly larger, with the forewing reniform more uniform with the ground; there is a paler patch subdorsally just distal to the forewing postmedial. T. rufipennis is also similar but is a richer brown with double, dark postmedials. In the male genitalia, those of dinawa (Seram; slide 14372) are relatively larger, the valves with a narrower, more spatulate costal process and a quadrate, rather than asymmetrically bifid, saccular one. Those of rufipennis are inseparable.

Tamba occidinawa

. BORNEO: Sabah, Danum Valley, 5°01' N, 117° 47' E, 14.ix.1987, 100m (A.H. Kirk-Spriggs), roadside, secondary forest, BM noctuid slide 19185.

Paratypes: 3 as holotype; 4 general data as holotype, but 18, 20.x.1987, primary forest edge; 1 (slide 18077) SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8, Site 8, February, Camp 1, Mulu, 150m. 385470, mixed dipt. for.; 2 Dutch West BORNEO, 85 miles above Pontianak (Simons et Meligan (Sanggan)) ex Janson, April 1909; 1 INDONESIA: Borneo, Kalimantan.

Tengah, Barito Ulu 2001, at Busang / Rekut River Junction, 0
°38' S, 113°59' E, viii.2001 (G. Martin).

Geographical range. Borneo, Sulawesi (slide 19188), Sumatra (HS / K), Thailand (VK).

Habitat preference. All material is from lowland forest, some with disturbance.

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