470 PROCEEDINGS OF THE ACADEMY OF [June, 



Stenohothrus curtipennis, Mecostethus lineatus, CUnocephahis elegans, 

 Paroxya floridiana, Orchelimum vulgare, 0. spinulosum and Xiphidium 

 Jasciatuni. Mermiria vigilans I took once in a rather open bog at 

 Belle Plain along the southern edge of the Pine Barrens. All of these 

 species are most frequent in the more open, well-lighted parts of the 

 bogs. In the densely wooded parts they are absent or exceedingly 

 scarce. 



In cleared and cultivated districts a type of faunule occurs which 

 in essential respects resembles the Subcoastal faunule of the Coastal 

 District. This faunule is characterized by the dominance of Melano- 

 plus fcmur-7'ubrum, a grasshopper that is remarkedly exceptional in 

 the less disturbed portions of the Pine Barrens, as Rehn has pointed 

 out. Common associates of this species in the settled parts of the 

 Barrens are Dissosteira Carolina, Orphulella pelidna, Melanoplus 

 atlanis, Arphia xanthoptera, Chortophaga viridifasciata and Melanoplus 

 femoratus. Much less frequent and, on the whole, rather local forms 

 appear to be such species as Conocephaliis rohiistus, C. triops, Orcheli- 

 mum vulgare, Xiphidium strictum, Amblycorypha uhleri and Hippiscus 

 rugosus. This faunule is most typically represented in old and 

 neglected fields well overrun with weedy vegetation. 



IV (c). The Middle District or Delaware Valley. 



As already mentioned, I am not disposed to consider the Middle 

 District of the Coastal Plain as having the same faunal value as the 

 Coastal and Pine Barren Districts. It contains no distinctive species 

 of Orthoptera, its claim to recognition as a separate Orthopteran 

 faunal province being based solely upon the intermingling of 

 faunules which in the other districts rarely or never intermingle 

 and the absence of certain of the more distinctive Pine Barren types. 



The Middle District includes all that part of New Jersey which 

 lies south of the fall-line and west and north of the Delaware-Atlantic 

 Divide, together with the more hilly districts of northern Coastal 

 Plain New Jersey and a narrow strip of relatively low land in Pennsyl- 

 vania bordering the Delaware River south of Trenton. As Stone 

 has shown, this part of Pennsylvania has many distinctive Coastal 

 Plain plants. A similar agreement is to be seen in the Orthoptera, 

 especially in those inhabiting the marshes. 



This strip of Coastal Plain country in Pennsylvania has so many 

 characteristics differentiating it from the more typical Coastal Plain 

 as exemplified in New Jersey that it requires separate consideration. 

 It represents a series of successive flood-plains of the Delaware River, 



