Prionia spurca Swinhoe, 1902, Trans, ent. Soc. Lond., 1902:
Diagnosis. This species is related to the next two, with similar features of facies
and male genitalia: produced gnathus with dorsoventral flattening and apical
serration; loss of furca except for a conical furca pocket; valve costa apically
setose and slightly produced; aedeagus vesica with a narrow lobe with a dense
cluster of spines and a broad one with more disperses spines. In spurca the
speckled brown and grey area of the hindwing occupies half to two thirds of the
dorsal part rather than about one quarter; fasciae on the strongly speckled
forewing are obscure except at the costa where they are broad, strong.
Geographical range. Borneo, ?Java.
Habitat preference. The species is not common, noted mainly from lowland
alluvial and dipterocarp forest, including that on limestone.
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