1916.] NATURAL SCIENCES OF PHILADELPHIA. 87 STUDIES IN THE DERMAPTERA AND ORTHOPTERA OF THE COASTAL PLAIN AND PIEDMONT REGION OF THE SOUTHEASTERN UNITED STATES. BY JAMES A. G. REHN AND MORGAN HEBARD. In the summers of 1911 and 1913, the present authors made extensive collections of, and field studies in, the Dermaptera and Orthoptera found in the southeastern States. About the time we were able to begin laboratory work on the first season's collecting, other series from the same general region were placed in our hands, since which time an increasing amount of data has become available bearing on the same subject. We feel the most advisable method of making available to workers the really great amount of distribu-tional, synonymic and variational information now in hand, to be the publication of this single large paper. The authors' time has been given more or less regularly for a period of two years to the preparation of this paper and others made necessary by collections referred to herein. It should be borne in mind that the present paper is not a final one, but instead a contribution based on available material, although nearly all of the species known from the regions studied are treated. In general, the geographic area covered by the collections here studied is, the Coastal Plain and Piedmont regions from the Potomac River south to north-central (non-peninsular) Florida, west to the western boundary of Georgia. In addition a fair amount of material from the higher elevations in Georgia, from certain localities in central Florida and also from Maryland and other more northern States has been included. Aside from the Georgia mountain region records, which are geographically very important, those from outside the main area covered by the paper have been included to place on record the extreme geographic limits of certain species, or to cite material used in the detailed discussion on the species. In the study of certain genera here treated we have found it not only desirable, but necessary, to revise completely those groups as found within North America, in the course of which work practically all the available collections bearing on the subjects have been examined. These revisions consumed much time and involved some travel. The collections of the United States National Museum, the Museum of Comparative Zoology and the Georgia State Collection
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