Cychrus hemphillii is a species of ground beetle in the subfamily of Carabinae. It was described by George Henry Horn in 1878. This species is found in the United States and Canada.

Subspecies Cychrus hemphillii hemphillii (Idaho, Utah, Wyoming) - Hemphill's rare snail-eating beetle Cychrus hemphillii rickseckeri LeConte, 1884 (British Columbia, Idaho, Montana, Oregon, Utah, Washington) - Ricksecker's rare snail-eating beetle

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