Type species: regularis Warren, Khasia Hills.
Synonyms: Mnesithetis Warren (type species inobtrusa
Warren, Sulawesi); Triorisma Warren (type species violacea Warren,
Symmacra and Dithecodes Warren both contain small olive
green or brownish species with faint transverse fasciae and a broken white bar
for the hindwing discal spot. The former is the oldest name. Species of the
latter from S.E. Asia have recently been discussed by Sommerer (1994). The male
antennae of both genera are strongly ciliated, the cilia robust, long.
The male abdomen has the second sternite strongly
modified, almost pouched as in the Scopulini. The type species has the uncus
apically bilobed as in some Dithecodes. The valves are small, triangular,
apically cleft with the dorsal process flexed down over the ventral one. The
aedeagus vesica contains a single cornutus. In S. solidaria Guenée the
uncus is trifid, the slender lateral processes (socii?) being larger than the
central one. The valve apex is more deeply cleft.
In the female (solidaria) the bursa is very
elongate, generally scobinate and longitudinally fluted, but with no distinct
signum. The ductus is relatively short, sclerotised, the ostium opening
posterior to a transverse, bilobed flange.
Little is known of the host-plants of the two genera
though the Japanese type species of Dithecodes feeds on Prunus, Malus and
Sorbus in the Rosaceae (Sugi, 1989).
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