44 



Delaware and Susquehanna rivers. Arrives and departs about the 

 same time as the preceding. Apparently most numerous during 

 migrations. 



17. Larus atricilla Lixx. Laughing Gull. Black-head. 



Breeding Range — Atlantic coast, New England southward. 

 Winter Distribution — West Indies and Mexico to S. A. 



Summer resident on the New Jersey coast ; formerly abundant, 

 breeding in large colonies on Brigantine Beach and the beaches and 

 islands of Cape May county. It has now, however, become quite 

 rare during the breeding season, though a few pairs still nest near 

 Brigantine {De Haven) and in the vicinity of Sea Isle City. 



During August and September this species occurs more plentifully 

 in flocks all along the coast, ranging as far north as Pt. Pleasant, and 

 is especially numerous in lower Delaware bay. Arrives at Atlantic 

 City April 26 to May 1 and departs Sept. 20-October 1. During 

 migrations it occui'S as a straggler on the Delaware and Susque- 

 hanna rivers. 



18, Lar us Philadelphia (Ort>). Bonaparte's Gull. 



Breeding Range — Far northward. 



Winter Distribution — Coast of Southern States. 



Tolerably common transient along the coast, and some probably 

 occur in winter. Occasionally found on the Delaware and Susque- 

 hanna rivers during migrations. One was taken at Atlantic City as 

 early as August 21, 1892 [De Haven). 



19, GelocJielidonnilotica (Hasski^q.). Gull-billed Tern. 



Marsh Tern. 



Breeding Range — Brazil to Long Island. 



Winter Distribution — Southern Mexico and southward. 



Rare visitant along the New Jersey coast, where it is reported to 

 have bred formerly.* 



Occasional straggler on the Delaware river, and one specimen is 

 recorded by Dr. Warren from Chester county. Pa., on the authority 

 of Mr. H. B. Graves. 



* As late as 1886 according to Mr. Harry G. Parker (0. ^ 0., 1886, p. 138). 



