Phostria obscurata is a species of moth in the family Crambidae described by Frederic Moore in 1885. It is found in Taiwan, India, Sri Lanka, Singapore and Myanmar.Shibuya, J., 1928. "The Systematic Study on the Formosan Pyralidae" . Journal of the Faculty of Agriculture, Hokkaido Imperial University. January 1928; 22(1): 1-300.
Description Adults are purplish brown. The forewings have an extremely indistinct blackish transverse outwardly curved narrow antemedial band, and an irregular postmedial band. There is a spot in the middle of the cell, and a streak at the end. The hindwings have a similar irregular discal band.The Lepidoptera of Ceylon
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