Type species: amabilis Bryk = vira Moore, N.E. Himalaya.
Synonym: Allodrepana Roepke (type species siccifolia Roepke,
Watson (1968) revised the genus (as Nordstroemia - see Fletcher
(1979)). It has typical 'hooktip' forewing shape, and a buff or grey ground
colour to the wings, with oblique, straight, darker fasciae: strong post- and
antemedials, usually parallel, on the forewing, repeated over the dorsal half or
third of the hindwing. The male antennae are usually bipectinate, the basal part
of the shaft with brilliant, lustrous scales.
In the male abdomen, the eighth sternite is short, shaped like an
inverted 'T'. The seventh sternite is also modified. The genitalia have the
uncus long, slender, rod-like, apically bifid, and the socii broader, setose of
equal length or shorter on either side. The valves are characteristically
complex, with interior processes bearing numerous, long, robust setae. The
aedeagus has its apex and/or vesica variably ornamented.
Watson (1968) included sixteen species in the genus, and Inoue (1992)
described two more. It is most diverse in the tropics and subtropics of mainland
Asia, but has several species in Sundaland and one in the Philippines. There are
two in Borneo.
Sugi (1987) illustrated larvae of three Japanese species, and one from
Taiwan was illustrated by Wang (1995). They are rugose, with a fine,
somewhat reticulate, rippled pattern on pale brown. The build is robust,
tapering from the head to the tail where the anal process is well-developed,
The host-plants (also Teramoto, 1993, 1996) were Betula (Betulaceae),
Castanea, Fagus, Quercus (Fagaceae) and Corylus (Corylaceae).
Sevastopulo (1947) recorded N. argenticeps Warren from Rubus (Rosaceae)
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