1914.] 



NATURAL SCIENCES OF PHILADELPHIA. 



475 



Bridgcton. As analyzed by the Bureau of Soils, it is remarkable for 

 its low sand content (9-25%) and high percentage of silt (55-75%) 

 and clay (10-15%). It is a highly fertile soil and is almost entirely 

 under cultivation. 



The grasshopper fauna of the New Jersey portion of the Middle 

 District includes the following species: 



The dominant and more uniformly distributed types in the Middle 

 District are the species belonging to the Coastal fauna, but in the 

 northern half these are associated with a considerable number of 

 typical Piedmont species, such as Dichromorpha viridis, Stenobothrus 

 curtipennis and Encoptolophus sordidus. All three of these are com- 



1^ Not, so far as I am aware, actually recorded from the Middle District, but 

 occurrence highly probable. 



