Bireta (Norraca) sabulosa Kiriakoff,
Norraca sabulosa Kiriakoff; Kiriakoff 1968: 81.
Diagnosis. Both this and the next species lack the postmedial row of black dots at
least over the anterior half of the wing, compared with the Saliocleta and
Ceira species. This species is more extensively suffused with greyish
(cf. fawnish) brown over the forewing than the next, and has more definite
subbasal dark spots. Both this and the next species share a distinctive asymmetric
pair of acute processes on the aedeagus apically and subapically; in sabulosa
the apical process is longer, flexuose, and the subapical process is curved.
The uncus tends to be narrower.
Taxonomic notes. This species is probably the high altitude sister species of the next.
The genus Norraca requires careful revision based on all type material
and long series, with male genitalia preparations made as uniformly as possible
because differences in uncus shape and aedeagus ornamentation are subtle and
subject to deformation.
Geographical range. Sumatra, Borneo.
Habitat preference. The species is probably montane. A single male has
been taken in Borneo, in upper montane forest on G. Mulu (1790 m).
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