HYPOTHETICAL. 225 



nor in Pennsylvania, throws doubt upon any record not 

 accompanied by specimens. 



3. (42.) Larus glaucus Briinn. 



Glaucous Gull. 



Arctic regions, south in winter to the Great Lakes and 

 Long Island. 



4. (65.) Sterna maxima Bodd. 



Royal Tern. 



Tropical America and warmer parts of North America, 

 casually northward to Massachusetts, the Great Lakes and 

 California. 



5. (71.) Sterna paradisea Briinn. 



Arctic Tern. 



This tern should be found passing across the state during 

 the migrations. 



6. (120a.) Phalacrocorax dilophus floridanus 



(Aud.). 272a. 

 Florida Cormorant. 



Synonyms: Graculus dilophus var. floridanus, G. floridanus, 

 Phalacrocorax floridanus. 

 Water Turkey. 

 Wheaton, Ohio Agri. Report, 1874, 575. 



The evidence that this form nested in considerable num- 

 bers at the St. Mary's reservoir prior to 1875, is not be- 

 yond question. 



7. (155.) Histrionicus histrionicus (Linn.). 



Harlequin Duck. 

 Synonyms: Anas histrionicus, Histrionicus torquatus. 



Admitted to Dr. Wheaton's list in error. It may be 

 found in the state. 



