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The North American Pterostichus of the Subgenus Cylindrocharis Casey (Coleoptera, Carabidae)
By Thomas C. Barr, Jr
American Museum of Natural History, 1971
Cite: 1041815 with citation markup [cite:1041815]
PDF here of this great paper.
Note- Since this publication, P. acutipes kentuckyensis has been found in Soutwest Virginia as well as Kentucky.(source)