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Carbia Walker

Type species: calescens Walker.

Synonym: Leiocera Hampson (type species axis Hampson = pulchrilinea Walker) syn. n.

This genus, Pomasia Guenťe and Pardodes Warren (New Guinea) contain a number of strikingly patterned, often orange, red or yellow species that share an unusual feature: the apodemes at the base of the second tergite are very long and slender in both sexes (Fig 347). This feature is also seen in some Eupithecia Curtis.

Whilst Pomasia contains species of relatively uniform genitalic characteristics, Carbia consists of three rather divergent groups, at least with regard to the structure of the bursa in the female. All have facies where the pale postmedial on the forewing is a strong zig-zag, but the submarginal, at least over the anterior two-thirds, is more or less straight. The fasciation is finer, more regular and linear than in Pomasia and the hindwings are more or less plain rather than similarly patterned to the forewing as in Pomasia and Pardodes: section Leiocera is an exception to this. Pardodes has broad, diffuse orange-yellow bands, interrupted in places on a paler yellow ground.

The male genitalia have the valves broad, with a broad field of setae around the rounded ventral margin that are directed towards the base of the costa. Labides and falces are well developed but not modified. The uncus is short, acute, the subscaphium sclerotised over a considerable length and setose in places. These features are seen also in Pardodes, and also in Poecilasthena Warren and the genera following it in Eupitheciini.

The ovipositor lobes of the female are rather narrow, acute, darkly sclerotised compared with those in Pomasia, but this feature is shared with Pardodes. Typical Carbia females have the ductus and sterigma very broad, the bursae elongated into a tube, spined more heavily on one side, leading to a small, ovate, immaculate bulb distally. Section Leiocera has a somewhat X-shaped sclerotisation basally in the ductus, with the bursa slight, narrow, with two longitudinal combs of small spines in the distal part. The third section (C. moderata Walker, C. nexilinea Warren, C. calefacta Prout and relatives) has the ductus and ostium narrow, simple: the bursa is spherical, extensively spined usually with a ligulate appendix laterally; C. nexilinea has a helical band of spining in the neck of the bursa. The situation in Pardodes is much as in this last section but there is a distal, immaculate bulb instead of the ligulate appendix, and a small atrium to the spined spherical part of the bursa that contains a few more robust spines as in some Pomasia.

Carbia is most diverse in Sundaland, all species being represented in Borneo.

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