APPENDIX. 



SINCE the A. O. U. Check-List was issued, several alterations 

 in the nomenclature of North American birds, as well as additions 

 to the avi-fauna, have been made. The following are the changes 

 which affect the present Catalogue : 



Somateria mollissima borealis. 



GREENLAND EIDER. 



This replaces the Eider (S. Mollissima} of the Check- List. 



In a note in RIDG WAY'S Manual of North American Birds, 

 the author states that the American bird proves to be not the true 

 ,5! mollissima (which is found in Northern Europe), but a fairly 

 distinguishable race, which he describes and names as above. 



Symphemia semipalmata inornata. 



WESTERN WILLET. 



This is an additional sub-species. 



In The Auk for April, 1887, Mr. WILLIAM BREWSTER 

 separates the western bird from that found along the Atlantic 

 coast, giving the present form sub-specific rank. It is said to 

 differ from typical semipalmata in size, color, and markings. Its 

 habitat is given as : " Interior of North America, between the 

 Mississippi and the Rocky Mountains; wintering along the coasts 

 of the Gulf and the Southern Atlantic States (Florida, Georgia, 

 South Carolina)." 



I cannot give the distribution in Canada of the two forms, 

 though it is probable that true semipalmata ranges from the 

 Atlantic to Manitoba, while inornata is restricted to the Prairies. 



(123) 



