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Acropteris grammearia Geyer  
Acropteris grammearia Geyer, 1832, Zütrage Samml. exot. Schmett., 4: 36.
Micronia caseata Guenée, 1857, Hist. nat. Insectes, Spec. Gen. Lep., 10: 27.

Acropteris grammearia

This species and rectinervata Guenée are virtually identical in the female. Males can be distinguished by the forewing venation: this is normal in rectinervata but with distinct curvature on all veins from M2 back, and CuA1 and CuA2 running closely parallel to two thirds from their common stalk, whence they diverge. The common stalk of R5 and M1 is also shorter. This atypical venation is clearly seen in the illustration for the original description. No major differences could be located in the genitalia of either sex, though the corematous apex of the valve in rectinervata may be somewhat narrower.

Taxonomic notes. Fletcher (1979) indicates grammearia is a synonym of striataria Clerck, but striataria is a distinct, more lightly fasciated Australasian tropical species.

Geographical range. N.E. Himalaya, Burma, Java, Borneo.

Habitat preference. The species appears to be rare in Borneo, the only specimen taken in recent surveys being from kerangas forest on a river terrace near the western end of the Melinau Gorge in Sarawak.

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