APPENDIX. 



Since the A. O. U. C heck- 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. 



GKEENLAND EIDER. 



This replaces the Eider (kS. Mollissima) of the Check-List. 



In a note in Ridgway's Manual of North American Birds, 

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

 kS. 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. 



