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Tanaorhinus
Butler
Type species: confuciaria
Walker, China, a subspecies of reciprocata Walker.
Species in the genus are
large with wings that are darkish, rather bluish green above, the hindwing
yellow with dull red or mauve suffusion and banding below. The forewings are
apically strongly falcate. The hindwing tornus is also slightly falcate. The
green pigment is very labile, readily fading to yellow in contact with killing
agents. The fasciation of the wings above is paler than the ground colour. The
male antennae are narrowly bipectinate to two thirds.
In the male abdomen
there is a pair of setal patches on the third sternite. In the genitalia the
uncus is weak, the socii strongly developed like the horns of cattle. The
gnathus is strong, albeit slender. The valves are relatively simple, with a
definite harpe from the sacculus. Coremata are present. The vinculum is somewhat
cruciform.
The female genitalia in
the T. rafflesii Moore group have the ovipositor lobes of a more general
geometrid type, but the signum is of the typically geometrine bicornute form,
arranged longitudinally in a very elongate bursa (Fig 162). The ductus is short.
In the type species the bursa is more pyriform, the signum transversely
oriented.
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The genitalia of both
sexes are similar to those of Geometra Linnaeus.
The type species has
been reared from Quercus (Fagaceae) in Japan (Nakajima & Sato, 1979),
The genus is most
diverse in the Oriental tropics, but the rafflesii group extends
eastwards to New Guinea. Yazaki (1995) recently described two new montane
species from the Philippines and Sulawesi.
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