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Alcis
Curtis
Type species: repandata Linnaeus, Europe.
Synonyms: Poecilalcis Warren (type species nigridorsaria Guenée,
India); Dictyodea Wehrli (type species maculata Moore).
This genus includes a large number of Oriental species, many with
typically boarmiine facies but some (e.g. in Dictyodea) more strongly
marked, and others with hindwings broadly orange or dull reddish. The male
antennae are bipectinate, the pectinations rising apically on each segment
(compared with basally on the related genus Rikiosatoa Inoue (Sato, 1984a)).
Diagnostic features are located in the genitalia. In the male, the uncus
is typically somewhat hooked. Socii are present in some taxa, strong in the A.
periphracta Prout group (See A.
periphracta Prout). The centre of the valve bears a
digitate flap, based subcostally and directed usually ventrally. In some species
this is double or strongly setose. In many there is a smaller digitate process
arising basally to it, directed distally towards it or overlapping it. The valve
cucullus is strong. The juxta is deep, with a pronounced distal bifurcation into
lateral blades or slender rods, forming an incomplete ring. The aedeagus is
short, often with a lateral halberd-shaped cornutus-like thickening that bears a
lateral process just subapically. The vesica is scobinate, rarely with a
cornutus (See A. periphracta).
In the female genitalia the ductus is very short, the bursa long,
narrow, often with scobination or corrugation over its basal part. Distally it
is either immaculate or with one or two transverse bands of scobination.
Some species in the genus are highly polyphagous, with ferns and
gymnosperms recorded as host-plants as well as numerous angiosperm families
(Sato, 1984).
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