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Plagiograpta
Hampson
Type
species: macrodonta Hampson, India.
With narrow wings and elongate male abdomen, this genus resembles the previous
two. However, the forewing venation lacks an areole, the radial sector branching
being (R2 (R3, R4)). In the hindwing, M3 and CuA1 are stalked. The wings are a
dark ashy grey, with white highlights and other variegation on the forewing, the
pattern tending to be as much longitudinal as transverse.
In
the male abdomen there are no definite tymbals, but there is a lobed structure
exterior to the apodemes of the basal sternite, also in the female. The eighth
segment is somewhat elongate, and also both sclerites have extremely long,
slender apodemes (Fig 445). The uncus, gnathus, scaphial structure and tegumen
are as in the previous two genera except the scaphium is supported on each side
of the uncus by broad, socius-like structures, the swollen ventral part of the
tegumen on each side bearing long, hair-like setae on patches similar to those
of Tathothripa. The centre of the valve costal margin has a distinctive
field of minute, peg-like setae. The aedeagus is long and slender, supported by
a blade-like sheath, an extension posteriorly from the saccular shield.
In
the female, the ductus bursae is similarly long and slender. The bursa is
irregularly triangular in shape, lightly scobinate or pitted throughout but
without a signum.
Although Gardner (1948a) assigned the larvae of Labanda and
Plagiograpta to widely different groups in his system, some of the features
of the head and chaetotaxy are shared: a narrow frons, higher than wide; ocelli
1 and 2 close or contiguous; SD1 on A8 is almost vertically above the spiracle.
The few species are Oriental to Australasian, treated here or by Kobes (Heterocera
Sumatrana, 2: 157-158).
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