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“Barsine”
exclusa Butler
comb. rev.
Barsine exclusa Butler,
1877, Trans. ent. Soc. London, 1877:
340.
Barsine
trivittata Moore,
1877, Proc. zool. Soc. Lond., 1877:
597.
Diagnosis
and taxonomic note. This
and the next three species may form a group that, with allied species elsewhere
in the region, may merit generic status. The build is more delicate, the wings
more elongate than in typical Barsine, but
the forewing fasciation is somewhat similar to that of B. cruciata (see "Barsine"
pallinflexa sp. n.), with angling and central fusion of the
antemedial and subbasal forming a letter ‘X’. The submarginal has three more
prominent spots, one near the costa (often obscure) and two on either side of
the centre of the wing; these are also emphasised in some of the more typical Barsine
species. In the male genitalia, the valves lack a central costal process,
but may have the two more distal ones or have the valve apex entire. The
aedeagus vesica has only smallish coarse spines and may also have additional
longer ones (porphyrea Snellen). In
porphyrea and sullia Swinhoe the apex of the aedeagus or anellus where it fuses
has patches of spines on each side. The female genitalia of porphyrea
have two scobinate signa in the bursa.
“B”
exclusa and “B“ porphyrea Snellen are almost as large as cruciata. They differ slightly in facies, the latter having paler
patches on the forewing rather yellow, rather than brick red, though yellowish
forms of exclusa occur. In exclusa
the inner boundary of the patch of ground colour containing the discal spot
is concave, whereas it is straight in porphyrea.
The postmedial, antemedial and subbasal fasciae all meet the dorsum more or
less in parallel in exclusa (the
‘X’ is rather distorted), but in a more zig-zag fashion in porphyrea. The Andamans subspecies, trivittata Moore, has the valves of the male genitalia with rounded,
rather than acute, apices.
Geographical
range. Sundaland;
Andamans (ssp. trivittata).
Habitat
preference. This
is an uncommon species of lowland forest, including secondary forest.
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