1914.] NATURAL SCIENCES OF PHILADELPHIA, 441 



DATA ON THE ORTHOPTERAN FAUNISTICS OF EASTERN PENNSYLVANIA 



AND SOUTHERN NEW JERSEY. 



BY HENRY FOX. 



In the period from 1908 to 1912, inclusive, I collected Orthoptera 

 extensively in various parts of the area here under consideration, 

 spending as much time in the field as I could spare from other duties. 

 During that time I accumulated data on the regional and habitat 

 distribution of various species of Acrididce and Locustidce, which, 

 although admittedly incomplete, suggest at least the general lines 

 along which the study of such problems may ultimately be developed. 

 In this study I endeavored to ascertain, in the first place, the exact 

 areal distribution of each species and, secondly, the kind of environ- 

 ment in which it normally or prevailingly occurs. 



The present paper is based upon the results of my own field obser- 

 vations, but to make it as complete as possible I have freely availed 

 myself of all available sources of information and have frequently 

 included data gathered by others, due acknowledgment of which 

 I have endeavored to make in every case. In this connection I have 

 found the distributional data given in the new N. J. State Report on 

 insects^ especially valuable. I am also under obligations to Mr. 

 James A. G. Rehn and Mr. Morgan Hebard for generously placing 

 their local collections and those of the Academy of Natural Sciences 

 of Philadelphia at my disposal and for permission to use the data 

 so obtained. 



Witmer Stone, in his splendid work on the plants of southern 

 New Jersey,^ remarks on the incongruity of finding a southern flora 

 and fauna by going eastward, as may be done in the vicinity of 

 Philadelphia. The same incongruity is exemplified by the Orthop- 

 tera which in southern New Jersey are predominantly of austral 

 aspect, whereas those of eastern Pennsylvania are mostly of transition 

 types. 



As is well known, the region included in the present study includes 



1 Annual Report of the New Jersey State Museum, including a Report of the 

 Insects of New Jersey, 1909, pp. 177-190. 



- Annual Report of the New Jersey State Museum, including a Report of 

 the Plants of Southern New Jersej', with Especial Reference to the Flora of the 

 Pme Barrens, 1910. 



