Miyakea expansa is a moth in the family Crambidae. It was described by Arthur Gardiner Butler in 1881. It is found in Japan and South Korea., 2007: A study of the genus Miyakea Marumo (Lepidoptera: Crambidae: Crambinae) from China, with description of one new species. Acta Zootaxonomic Sinica 32 (3): 564-567.
The wingspan is 11–13 mm.Japanese Moths
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