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Necyopa ioge Prout comb. rev.
Necyopa ioge Prout, 1932, J. fed. Malay States Mus., 17: 102.
Diplurodes ioge Prout; Holloway, 1976: 80.

Necyopa ioge

Necyopa ioge

This and the next species are easily confused and perhaps best separated by the male genitalia where ioge has a triangular costal process to the valve and subtriangula a digitate one. Both have the forewing markings greenish brown on a creamy fawn ground, the latter most evident in the unmarked medial zone of the forewing. The hindwing has a broad, darkish grey border and some fasciation of the same colour or invested with greenish antemedially. The forewings of subtriangula are more contrastingly marked, the male hindwing more triangular but lacking the dark subtornal mark of ioge.

Taxonomic notes. Specimens from S. Burma (slide 13200) and Peninsular Malaysia (slide 14861) have male genitalia similar to ioge but the valve costal process is less broadly triangular and the abdominal coremata slightly less strongly developed.

Geographical range. Borneo.

Habitat preference. The species is most frequent in lower montane forest at around 1000m but has been taken at 1618m on Bukit Retak in Brunei and as high as 1930m on G. Kinabalu.

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