Tamba transversa Holloway sp. n.

♂♂ 9-10mm. This is one of the smaller species in the genus and has an unusually transverse arrangement of fasciation on the forewing, including the forewing postmedial (usually strongly angled). The ground colour of the wings is a faintly creamy white, shaded and fasciated a slightly violet brownish grey as illustrated. This shade is deeper distal to the straight postmedials which are of ground colour with a very dark component distad. The forewing postmedial has a central fracture. There are much fainter, curved antemedial and subbasal pale fasciae on the forewing, a diffusely darker medial one between the dark dot of the orbicular and the paler (with dark edges), slightly sigmoid reniform bar. The marginal areas of the wings are crossed by a pair of irregular, pale submarginal fasciae. The male genitalia are typical of the genus, the valves with the inner, costal process broad and the central to outer one small, resembling pallidiplaga Swinhoe and bartelsi Kobes in particular, but with the inner process relatively shorter, broader, outturned, and without the bilateral asymmetry seen in bartelsi. The facies is totally different from both these species.

Holotype ♂

MALAYSIA: Sabah, Danum Valley, 170m, 4°58’ N 117°48’ E (S.J. Willott), 1° understorey, Obs. Platform., DVFC, 29.viii.93, BM noctuid slide 19978.

Paratypes:

• 1♂ as holotype but understorey 1U, 30.i.94
• 1♂ as holotype but 1° understorey ER, East Ridge, DVFC, 19.vii.94
• 2♂♂ 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.

Habitat preference

All material is from lowland dipterocarp forest. The holotype and two paratypes are vouchers for six specimens taken in the primary forest understorey; none was taken in canopy or logged forest samples (S.J. Willott, unpublished data).

Taxonomic Note

Tamba transversa sp. n. (Plate 7, Fig 119) GG 9-10mm. This is one of the smaller species in the genus and has an unusually transverse arrangement of fasciation on the forewing, including the forewing postmedial (usually strongly angled). The ground colour of the wings is a faintly creamy white, shaded and fasciated a slightly violet brownish grey as illustrated. This shade is deeper distal to the straight postmedials which are of ground colour with a very dark component distad. The forewing postmedial has a central fracture. There are much fainter, curved antemedial and subbasal pale fasciae on the forewing, a diffusely darker medial one between the dark dot of the orbicular and the paler (with dark edges), slightly sigmoid reniform bar. The marginal areas of the wings are crossed by a pair of irregular, pale submarginal fasciae. The male genitalia are typical of the genus, the valves with the inner, costal process broad and the central to outer one small, resembling pallidiplaga Swinhoe and bartelsi Kobes in particular, but with the inner process relatively shorter, broader, outturned, and without the bilateral asymmetry seen in bartelsi. The facies is totally different from both these species. Holotype G. MALAYSIA: Sabah, Danum Valley, 170m, 4°58’ N 117°48’ E (S.J. Willott), 1° understorey, Obs. Platform., DVFC, 29.viii.93, BM noctuid slide 19978. Paratypes: 1G as holotype but understorey 1U, 30.i.94; 1G as holotype but 1° understorey ER, East Ridge, DVFC, 19.vii.94; 2GG 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. Habitat preference. All material is from lowland dipterocarp forest. The holotype and two paratypes are vouchers for six specimens taken in the primary forest understorey; none was taken in canopy or logged forest samples (S.J. Willott, unpublished data).