TRIBE CALPINI
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Oraesia Guenée

Type species: emarginata Fabricius, India.

This genus was briefly discussed by Bänziger (1983), who transferred a number of mainly African and New World species into it from Calyptra (Calpe). The greatest diversity of the genus is found in the New World, though the type species is Oriental.

The forewing is much narrower than in
Calyptra, its distal margin angled centrally; the subbasal lobe on the dorsum is also more angular in most species and often very pronounced. The patterning is more irregular and often shows sexual dimorphism, with females being darker, less rufous, more variegated. The pattern frequently includes a longitudinal disruption along the cubital vein in the cell that may continue as a pale or metallic streak along CuA2. On the costal side of this disruption the wing is generally paler, and the strongest fascia is the oblique postmedial running into the apex of the wing. On the dorsal side the antemedial is the most prominent fascia, running obliquely from the subbasal lobe of the dorsum. The labial palps are directed forwards and proportioned as in Calyptra, though perhaps generally shorter. The male antennae are usually bipectinate.

In the male abdomen, the eighth segment is of the framed corematous type, the pair of coremata being well developed. The genitalia have the uncus and scaphium as in
Calyptra. The valves are simple, tongue-like, without any processes in the type species but more often with a process interior to the sacculus that can be long, slender, digitate, or robust. The juxta is a broad, lightly rugose plate with a tent-like flange within it. The saccus is well developed. The aedeagus vesica is large, finely scobinate, without marked diverticula; it often bears one or more robust cornuti.

In the female of the type species the ostium is situated between the seventh and eighth segments but not particularly associated with either. The seventh sternite is moderately reduced. The eighth segment has normal apodemes. The ductus is long, sclerotised, ribbon-like, with some flexure distally. The bursa is ovate, basally sclerotised, distally densely scobinate, and with a convolute central structure.

Host records for Oriental members of the genus (Robinson
et al., 2001) have mostly from the Menispermaceae (Cissampelos, Cocculus, Stephania) but there is one record from Lepisanthes in the Sapindaceae. Other records from this latter family and from Myrtaceae, Rosaceae, Rutaceae and Vitaceae in Robinson et al. are probably of adult fruit-piercing.

From Sundaland eastwards only the
emarginata complex (see below) and C. argyrosigna Moore have been recorded. Records of the latter are disjunct, from the Indian Subregion, Thailand, Java, New Guinea, Australia and the New Caledonia area (Holloway, 1979; Nielsen et al., 1996), so it may prove to occur also in Borneo.

Both emarginata and argyrosigna have been noted to pierce fruit as adults in Thailand (Bänziger, 1982; Kuroko & Lewvanich, 1993).

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