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Negeta
Walker
Type
species: contrariata
Walker, Borneo.
Synonyms: Doranaga
Moore (type species
apicalis
Moore = contrariata, Sri Lanka);
Nertobriga
Walker (type species
reversa
Walker = contrariata);
Periplusia
Holland (type species
nubilicosta
Holland, W. Africa).
The forewing venation lacks an areole and has a reduced radial sector branching
system as described in the subfamily account above. The costa is more or less
straight, and the dorsum and distal margin form an even, continuous curve, so
the wing is approximately semicircular. The facies is distinctive, the ground
colour being shades of brown, with finely darker fasciae, particularly a
straight postmedial that runs from the centre of the dorsum to the apex. On the
costa just basal to it there is usually a white or grey triangular patch. The
reniform is transversely bipunctate, the dots being both white or, in some
species, with the anterior one black. The hindwings are also brown, duller than
that of the forewing but often darker.
In
the male genitalia the uncus is distinctly bulbous, sometimes bilobed; the apex
of the tegumen is also shouldered or bilobed. The valves are broadly based,
elliptical, with a strong harpe. The saccus is short, the aedeagus and vesica
narrow.
In
the female the sterigma is complex, with a rather heart-shaped, shallowly
grooved lamella postvaginalis. The ductus is very short, the bursa pyriform,
flimsy, without a signum, in the type species, but there is also a narrow tube
associated with it that may lead to an appendix bursae or be the true ductus, as
it is the only structure present in other species examined (e.g.
montanata
sp. n.).
Most species are Oriental, but the type species ranges throughout the
Indo-Australian tropics (see below). Nomenclatural problems involving this and
the next genus were addressed by Holloway (1982). The placement of African
species attributed to Negeta in Poole (1989) needs further study.
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