Abstract
its, it has been considered rare, and its range was long thought to be from South Carolina to Louisiana. Recent collecting has brought new specimens to light, and the recorded range has been extended from Virginia to Texas. It is the purpose of this study to delimit the range and explore the regional variation exhibited by this species. It has been found that the specimens fall into three distinct populations which appear to warrant subspecific recognition. A total of 255 specimens was examined, including sizable series from most areas of the range. Alabama, western Georgia, and North Carolina are sparsely represented. The following persons and institutions made specimens or data available (initials in parentheses are those used in subsequent references to these specimens): W. Frank Blair, University of Texas (TNHC); W. E. Brode, Gulf Coast Research Laboratory (GCRL); Bryce C. Brown (BCB), Strecker Museum, Baylor University (SM); E. Milby Burton, Charleston Museum (ChM); Fred R. Cagle, Tulane University (TU); Charles C. Carpenter, University of Oklahoma (UOMZ); Doris M. Cochran, United States National Museum
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