The North American Pterostichus of the subgenus Cylindrocharis Casey (Coleoptera, Carabidae). Barr 1971.
The North American Pterostichus of the subgenus Cylindrocharis Casey (Coleoptera, Carabidae). [pdf]Paper  abstract   bibtex   
Cylindrocharis Casey, a subgenus of Pterostichus Bonelli, includes three species: P. (C.) rostratus (Newman), ranging from southeastern Canada to the southern Appalachian Mountains of Tennessee and North Carolina; P. (C.) acutipes, new species, from central Kentucky and Tennessee to the mountains of Tennessee, North Carolina, and northeast Georgia; and P. hypogeus, new species, from the Nantahala and Snowbird Mountains, North Carolina. The central Kentucky populations of acutipes are described as a distinct subspecies, P. (C.) a. kentuckensis.

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