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Evonima Walker
Type
species: aperta Walker, Sundaland, Thailand, Taiwan.
Synonyms:
Mimerastria
Butler (type species
mandschuriana
Oberthür, Siberia);
Poecilonola
Hampson (type species
plagiola
Hampson, Sri Lanka)
syn. n.
Inoue (1991) reviewed this genus when describing a new species from Taiwan. It
is the first of the sequence of genera where the hindwing venation is reduced to a
trifine condition, and was
included by Hampson (1900) in his concept of
Roeselia.
The forewing venation is reduced by one in the radial sector except in
mandschuriana, with the distal bifurcation posterior as in
Melanographia.
The forewings of most species (mandschuriana is an exception) are
unusually colourful for the Nolinae, being marked in rufous orange and bluish
tints or rich brown, and the male antennae are ciliated rather than bipectinate.
In the male abdomen the eighth tergite has moderate, well separated apodemes,
but the sternite lacks them. The uncus is long, slender, setose, set on a
similarly narrow tegumen. There are two long bands of thickening associated with
the anal tube rather than the setose lobes seen in other nolines. The saccular
shield is clearly present if shallow. The somewhat rectangular valves have a
harpe running obliquely from the base of the valve costa to or just beyond the
ventral margin at about the mid-point; it is apically blunt and bears a few
small knobs ventrally towards the apex. The aedeagus is moderate, straight, with
no obvious ornamentation. The male genitalia are rather uniform in included taxa,
which are best diagnosed on facies features.
The female has short, rather triangular ovipositor lobes, a long, narrow ductus
bursae and a rather pyriform bursa with a transverse, ridged signum amid general
scobination.
The genus is the only one with a trifine hindwing where full larval head
stacking has been recorded (see p. 14), in
mandschuriana
(Sugi, 1987; illustration). The habit is seen in a possibly more vestigial form
in Manoba
argentalis
Moore. The host plant noted by Sugi was Quercus (Fagaceae).
There are four species in Borneo. In addition to the species referred to above,
the genus also includes
E.
albifurca
Hampson comb. n. (Philippines),
E.
elegans
Inoue (Taiwan),
E.
minora
van Eecke comb. n. (Sumatra),
E.
ochritincta
Hampson comb. n. (Sri Lanka, Taiwan, Sumatra, Bali),
E.
plagiola
Hampson comb. n. (Sri Lanka) and
E. xanthoplaga
Hampson comb. n. (N.E. Himalaya). Other species currently in
Poecilonola
(e.g. as listed by Poole (1989)) are probably not referable to Evonima,
but there is no obvious alternative placement. More species from S.E. Asia are
being studied by the Budapest group.
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