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Pygarctia spraguei, Sprague's pygarctia, is a moth of the family Erebidae. It was described by Grote in 1875. It is found from on the Great Plains from southern Canada to Texas, westward to Utah, eastward to Indiana and Louisiana.
The wingspan is about 31 mm.
The larvae feed on Euphorbia species.
References
Pygarctia spraguei Wikipedia(Text) CC BY-SA