similaria Swinhoe comb. n.
Myrteta similaria Swinhoe, 1915, Ann. Mag. nat. Hist (8), 16:
Myrteta similaria Swinhoe; Holloway, 1976: 82.
Diagnosis. The fasciation in this and the next species is similar, but in ocernaria
it is a more rusty brown, the postmedial of the forewing more
strongly curved at the costa and the antemedial entire rather than punctate and
running to the discal spot rather than curving round obscurely short of it. O.
similaria is generally larger. The male genitalia in ocernaria are
more delicate, with the costal margin of the ventral portion of the valve
sinuous rather than more or less straight. The cornutus in the vesica is entire
in ocernaria, bifid in similaria. The setal comb on sternite 3 is
absent in ocernaria. In the female the basal part of the bursa is more
strongly sclerotised and fluted in similaria, the distal part broader,
the signum much larger and somewhat more basal.
Taxonomic notes. Bornean material differs from typical specimens from Sumatra in lacking
a grey shaded apex to the forewing below but the male genitalia are identical,
distinguished by an elongate zone of finer spicules adjacent to the main one,
which is apically bifid. O. opalescens West comb. n. from Luzon and
possibly Sulawesi (slide 15865) has a similar main cornutus to similaria but
lacks (or has lost in the specimens examined - they are deciduous) the adjacent
spicules. O. sublavata Prout comb. n. & stat. n. from New Guinea also
has only the single bifid cornutus but it is longer and more slender. The bifid
nature of the cornutus defines these taxa as a natural group.
Geographical range. Sumatra, Java, Borneo.
Habitat preference. Most material seen is from the upper montane forest
(1500m to 2100m) of G. Kinabalu, G. Mulu and Bukit Retak, but a single female
was taken at Labi in lowland Brunei.
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