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