64 Journal New York Entomological Society, tvoi. xxi. 



cumstances never wander very far from the breeding places. Careful 

 inspection may often reveal the egg-masses also. Such observations, 

 though recorded only infrequently, show that certain species, espe- 

 cially of Chrysops (the deerflies) more often frequent the spring-fed 

 brooks and small streams, though species of Tabanus (horseflies) may 

 also breed in similar situations. Some species of Tabanus appear to 

 breed mostly in small upland marshes, while others seem to be con- 

 fined to the marshes about lakes. Chrysops brunneus and C. flavidus 

 frequent the larger marshes. A few species occur in brackish waters. 

 Thus Tabanus costalis is a common inhabitant of slightly saline inlets 

 and seashore marshes, and Chrysops flavidus has much the same 

 habitat, though both may frequently breed in perfectly fresh water. 



A prolongation of the terminal portion of the body bearing the 

 stigmata permits these breathing organs to be raised to the surface of 

 the water in respiration. This tube is composed of joints which tele- 

 scope into each other when the tube is withdrawn. Naturally such an 

 adaptation is related only to a shallow water existence, since the 

 breathing tube can be protruded to only a limited extent. As a matter 

 of fact the larvae are sometimes found in moist earth where there is 

 no standing water. 



In this region the following species have been taken and must be 

 reckoned as a part of our hydrophilous fauna: 



Chrysops niger Macq Lakehurst, N. J. 



flavidus Wied Lakehurst and Ramsay, N. J. 



callidus O. Sacken Ft. Lee, N. J., and Van Cortlandt 



Park, N. Y. 



univittatus Macq Ft. Lee, N. J., and Lakehurst, N. J. 



vittatus Wied Ft. Lee. 



excitans Walk Lakehurst, N. J. 



celer O. Sacken Van Cortlandt Park, N. Y. 



carbonarius Walk Ft. Lee and Newark, N. J. 



ma^chus O. Sacken Ft. Lee, N. J. 



obsolctus Wied Ft. Lee and Van Cortlandt Park, 



N. Y. 



cuclux Whitney Orange Mountains. 



plangens Wied Passaic, Newark Meadows and 



Staten L 



