Pyrausta onythesalis is a moth in the family Crambidae. It was described by Francis Walker in 1859. It is found in North America, where it has been recorded from Florida to Georgia, Iowa, Kansas, Oklahoma, Texas and Arizona.The Moths of Southeastern Arizona
The wingspan is 17–21 mm. The exterior line and a broad submarginal band on the wings are purplish red.List of the Specimens of Lepidopterous Insects in the Collection of the British Museum 18: 734 Adults have been recorded on wing from March to October.Moth Photographers Group. Mississippi State University.
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