Type species: membliaria Cramer.
This genus is monobasic and shares with the previous genus the character
of having white streaking in the forewing spaces as well as on the veins; the
next genus only has the latter. It is also defined by a strong secondary sexual
feature of the male: the basal third of the costal zone is expanded into a
semicircular flap that is folded back on the dorsal surface to enclose a crest
of long, straw-yellow scales that lie in between semicircular zones of small
dull orange scales on the wing membrane on either side. The female wings are
mostly bluish grey with whitish streaks on the veins and spaces except for the
forewing cell where there is a variable, irregular extent of orange and,
anterior to it, transverse blackish bars in pale grey at the costa.
In the male genitalia the valves have an angular process in the centre
of the costa; the harpe is bilobed as in Peridrome; the aedeagus vesica
is completely lobed, with extensive areas of sclerotisation and small patches of
scobination. The coremata of the eighth segment are relatively strongly
In the female the base of the ductus is sclerotised as in the previous
genus but conical rather than elliptical; the eighth segment is deeper and has a
pair of shallow sclerotised pouches anterior and ventral to the apodemes. The
scobinate bands run almost the length of the bursa and are much heavier and
broader towards their basal ends.
The lateral sacs of the female abdomen, shared with Peridrome, and
the barring of the female forewing costa indicate a sister-relationship with
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