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Egnasia
overdijkinki Prout
Egnasia
overdijkinki Prout, 1932, Bull. Hill Mus. Witley,
4: 285.
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Diagnosis
and taxonomic note. The species is very similar to the Himalayan E.
rectilineata Swinhoe
(see also the next species for females), with distinctly irregular wing margins,
a reddish-ochreous brown ground colour, with fine, darker brown fasciation.
There are nacreous discal spots on all wings, that of the hindwing larger than
that of the forewing, irregular, with a small subsidiary lobe arising from it on
the costal side. The male genitalia differ from those of rectilineata
in
having longer, slender valve processes and a more angled fused section of the
valves basally. The uncus is very broad, squarish, spined, and there are lobes
on the tegumen basal to it. The aedeagus is much narrower, with a simple, narrow
vesica that has delicate spines at its apex. Bornean material and a male from
Nias have the dorsal arm of the valve with more slender processes, but the
saccular arm is more robust. The uncus is narrower, but the lobes on the tegumen
are larger.
Geographical
range. Java, Nias, ?Peninsular Malaysia, Borneo.
Habitat
preference. The species is rare, represented by old material from Sarawak
and Pulo Laut, and a female from alluvial forest at 100m near the western end of
the Melinau Gorge, taken during the Mulu survey. Two specimens were taken in
lowland forest at 170m near the Danum Valley Field Centre in Sabah.
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