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Euconosia aspersa Walker
Lithosia aspersa Walker, 1862, J. Linn. Soc. (Zool.), 6:104 (partim).

Euconosia aspersa
(x 1.32)

Fig.2h Euconosia aspersa Walker

This and the next two species are very similar externally, xylinoides having a stronger angled fascia on the forewing, and obscuriventris having darker shading to the forewing, particularly in the female. The species are best distinguished on genitalic features. In the male, the aedeagus lacks a cornutus at the apex of the main part of the vesica, and the upper part of the valve has a fringe of short hairs that runs from the apex of the dorsal portion down its ventral margin to the bottom of the cleft separating it from the narrower ventral portion. The hairs are denser than in xylinoides. In the female, there is a sclerotised plate in the ductus and another in the neck of the bursa, the former being present and the latter absent in xylinoides, where the neck of the bursa is more generally thickened. There are scobinate signa at one third and two thirds in the corpus bursae, the more basal being larger; in xylinoides they are equal in size.

Taxonomic note. The original material consists of single male and female syntypes. The female (slide 4688) is hereby designated Lectotype, because the male (slide 5101) is a specimen of xylinoides.

Geographical range. Borneo, Bali (slides 5102, 5118).

Habitat preference. Three specimens were taken in alluvial forest, including regenerating forest, during the Mulu survey, and two in Brunei in coastal forest at Seria. It may be the species most characteristic of disturbed forest.

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