224 BIRDS OF OHIO. 



HYPOTHETICAL. 



The species included under this head are mostly those 

 whose known range should cover Ohio either during their 

 migrations or during their regular wanderings, but which 

 have not yet been found in the state. Two of the species 

 are here placed because they are regarded as hypothetical 

 forms in the United States. The Cincinnati Warbler is 

 still represented by a single specimen, and Brewster 

 Warbler has not yet been given the distinction of a sub- 

 specific rank. It will probably be some time before the 

 question of hybridism as applying to these two forms is 

 settled. I have deemed it wise to place here some species 

 included in Dr. Wheaton's catalogue on what appears now 

 to be insufficient evidence. It is not enough to say that a 

 species is or has been found ; the statement must always be 

 verified by specimens where the species is at all rare. 

 No record should be allowed to stand unquestioned without 

 the evidence of a specimen to prove that the species has oc- 

 curred within the state. 



1. (38.) Stercorarius longicaudus Vieill. 



Long-tailed Jaeger. 



This Jaeger may pass across the state in its migrations. 



2. (40.) RissA TRiDACTYLA (Linn.). 273. 



Kittiwake. 



Syronyms: Larus tridactylus. 



Common Kittiwake. 

 Wheaton, Ohio Agri. Report, 1860, 371, 379. 



There are two records for Ohio. That of three speci- 

 mens reported by Mr. R. K. Winslow in Cleveland harbor, 

 clearly before the eighties, and the report of Mr. E. W. 

 Vickers for Mahoning county. I am unable to find evi- 

 dence of the preservation of specimens of this gull. The 

 fact that it is regarded as rare or even doubtful as a winter 

 visitor in Michigan, and has never been found in Indiana 



