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Ballatha Walker
Type
species: laeta
Walker, India.
Synonym: Hyposcota
Hampson (type species laeta).
Species in this genus are brown-grey and yellow, sometimes with a slight angle
to the hindwing margin. In the venation, the forewing lacks an areole, with
radial sector branching being (R2 (R3, R4)). In the hindwing, M3 and CuA1 are
stalked and support an angle at the margin in the two mainland Asian species. As
in Cacyparis, the third segment of the labial palps is longer and more
slender than the second, though not to such an extreme. A brush of androconia is
present in males extending posteriorly from the point of origin of CuA2 from the
cell on the underside of the hindwing.
In
the male abdomen there are no basal tymbal structures, the apodemes being
relatively long and slender. The eighth tergite has broad apodemes somewhat like
the ears of a rabbit; the sternal margin is not lobed. The genitalia have an
elongate tegumen and a short uncus that is flanked by broad lobes. The saccus is
large, enclosing what appears to be a mass of androconial scales. The valves are
large, tapering distally, and have an unequally bifid process centrally where
each fork bears rows of somewhat ‘ariolicine’ peg-like setae. The aedeagus is
long, straight, slender.
The female has rather triangular, acute ovipositor lobes. The ductus is very
long and slender, leading to a bursa and appendix bursae, both rather pyriform,
one, presumably the bursa, half the size of the other, more thick-walled and
rugose; the smaller structure contains a small, conical spine, possibly a signum.
The type species ranges from N. India to Burma, and
B.
aurata
Warren occurs in Hainan. The Bornean species described below therefore
represents a considerable extension of the generic range.
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