Xyleborus nigricans, a second species for the previously monospecific genus newly found in the Mid-Atlantic Coastal Plain of North America

A second species of the genus Xyleborus, X. nigricans, is described as new to science from the Mid-Atlantic Coastal Plain of eastern North America where it appears to be endemic. The species is illustrated and compared to the allopatric X. sporodochifer, which occurs in the Ozark Highlands and Appalachian Mountains of eastern North America. The northern temperate and Appalachian floristic elements within the Atlantic Coastal Plain are also discussed.