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Avittonia Hampson
Type
species: albidentata Hampson,
Singapore.
Synonym: Cyrtandra
Roepke
(type species borneensis Roepke, Borneo = albidentata).
The
build and wing shape of this monobasic genus is closer to that of Platyja
and
allies than to Avitta,
and the hindwing has an obtuse, but distinct angle at the margin by CuA2. The
male antennae are highly fasciculate and, over the central portion, strongly
serrate, the processes of the serration being rather long and rectangular,
almost pectination; the legs have no obvious scale-tufts or hair-pencils. The
wings are dark brown with crenulate mauve fasciation and suffusion. This
fasciation is weak over most of the wing but forms a clear, double submarginal
band that is complete on the forewing but runs only from M2 to the angle at CuA2
on the hindwing.
In the
male abdomen there is a large corema within a frame on the eighth sternite. The
genitalia have a strong uncus that is domed and setose over the distal half,
tapering to an acute, down curved point. The tegumen is rather rectangular and
articulates with the vinculum through two distinct paratergal sclerites. The
valves are simple, rather flimsy and hairy, narrow, and narrowed still further
over the apical quarter. The aedeagus vesica is rather globular, scobinate in
places. None of these features indicates any clear relationship with the genera
mentioned in the first paragraph.
The
female has the terminal segments relatively short and deep, the ovipositor lobes
with a marginal band of fine pilosity within the usual sparser array of setae
somewhat as in the Episparis group (p. 293). The ostium is conical,
set at the posterior of the eighth segment, and leads into a long narrow ductus
that itself terminates in an elongate, pyriform bursa without ornamentation.
Several
of these features of the male and female abdomen are shared with “Ugia”
serrilinea
Hampson
as discussed on p. 186.
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