The Serrodes Guenée group
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Avatha pulchrior sp. n. 
Athyrma pulcherrima Butler sensu Holloway, 1976: 34.
Avatha pulcherrima Butler sensu Barlow, 1982, Plate 36: 8.
Pseudathyrma pulcherrima Butler sensu Kobes, 1985, Plate 13: 12, 19.

Avatha pulchrior

See pulcherrima above, which it resembles very closely. Differences are minor but, in Borneo and Sumatra at least, consistent: the distal edge of the antemedial band is straighter, less produced at its dorsal angle; the basal edge is more angular; the gradation from pale to dark in the centre of the submarginal zone is more irregular, less smoothly curved and more frequently marked by darker chevrons of the submarginal, which is more strongly zigzag subcostally. In the male genitalia the distal processes on the valve are shorter than in pulcherrima, the one on the right significantly more so such that it terminates well short of the valve margin rather than extending well beyond it. In the aedeagus vesica the scobination at the end of the long diverticulum is much finer than in pulcherrima and the larger spines elsewhere are concentrated on one of the smaller diverticula rather than being generally scattered.

Holotype . SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D.Holloway et al.), Site 17, March, nr. Long Melinau, 50m. 313441, low secondary forest on river bank, BM noctuid slide 10727.

Paratypes: 1 general data as holotype but Site 16, March, Long Pala (Base), 70m, 324450, alluv. / second. for.; 1 BRUNEI: 30-60m, Labi, lowland forest, 8.9.79 (Lt. Col. M.G. Allen); 1 (slide 9120) SABAH: Kundasan, 1050m, vii-ix.1965, Cambridge Expedition to Mt. Kinabalu 1965 (H.J. Banks, H.S. Barlow & J.D. Holloway).

Geographical range. Borneo, Sumatra, Peninsular Malaysia, Singapore, Thailand, Andamans, Sulawesi. 

Habitat preference. The species is more confined to the lowlands than pulcherrima, with all records (not all material retained) during the Mulu survey being from alluvial forest, both mature and in an early stage of regeneration, at around 70m. One specimen has been recorded from 1050m at Kundasan, an area of cultivation on the southern slopes of G. Kinabalu. The species would appear to be tolerant of disturbance.

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