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Oxacme Hampson

Type species: dissimilis Hampson, N.E. Himalaya (Fig 4i).

Fig 4i: Oxacme dissimilis Hampson

Oxacme is related to Macaduma and Tortricosia as discussed above under Macaduma. The forewings tend to be the most apically acute of the three genera, with a pale ground on which are delicately darker fasciae and spots.

In the male abdomen, the corematous structures invariably involve a conspicuous, basally biarcuate supporting structure in segment 7 extending back into segment 6 (e.g. Figs 151, 316). The genitalia have the uncus much shorter than in Macaduma, a slight, slender triangle. The valves are symmetrical, consisting of a triple distal portion, weakly sclerotised, and a series of processes set more basally, arising from the costa and the sacculus. The aedeagus vesica almost always contains one large, slender cornutus. Two Bornean species have rather more elongate, extensively sclerotised valves with reduced processes, and a more elongate uncus shaped more like a hockey-stick.

The female genitalia have general scobination in the bursa (Bornean species).

The genus appears to be restricted to the Oriental tropics. In addition to the two Himalayan species included by Hampson (dissimilis and marginata Hampson) and the Bornean species described below, it also includes O. cretacea Hampson comb. n. (Taiwan) and O. commota van Eecke comb. n. (Sumatra).

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