28 THE CHICAGO ACADEMY OF SCIENCES. 



western University at Evanston. Mr. H. K. Coale also reports 

 the taking of a specimen at Chicago, February 23, 1885. 



Mr. E. W. Nelson has reported the Red-throated Loon a 

 common winter resident upon Lake Michigan in 1876. It has 

 an extensive range which includes the northern part of the north- 

 ern hemisphere. It migrates southward in winter nearly across 

 the United States. 



ORDER LONGIPENNES : LONG-WINGED 

 SWIMMERS. 



FAMILY STERCORARIID^: THE SKUAS 

 AND JAEGERS. 



Genus STERCORAEIUS Brisson, 1760. 



Stercorarius pomarinus (Temm.). Pomaine Jaeger. 

 La^ug pomarinus Temm., Man. d'Orn., 1815, 514. 

 Stercorarius pomarinus Vieillot, Nouv. Diet., XXXII, 1819, 158. 

 Popular synonyms: Guix-chabeb. Gtjll-hunteb. 



Mr. E. W. Nelson, who records the only occurences of this 

 bird within our limits, says (Bulletin of the Nuttall Ornitholog- 

 ical Club, July, 1876, p. 41) : "From the description of a bird 

 seen with a flock of gulls near Evanston, Illinois, by F. L. Rice 

 of that place, and the account of a- strange gull occasionally seen 

 by a sportsman who does considerable shooting on Lake Michi- 

 gan, I am certain this species is a rare visitant during severe 

 winters." Mr. Nelson also reports seeing one of these birds on 

 October 9, 1876, at Chicago. It was "a fine adult specimen 

 flying along the Lake shore, and so near that there could be no 

 possibility of mistake."* 



It does not seem strange that this Jaeger might appear as 

 a rare winter visitant on the waters of Lake Michigan, for its 

 range includes the seas and inland waters of the northern por- 

 tion of the northern hemisphere. In the winter, it migrates 

 southward to Africa, Australia and from North America to South 

 America. 



Genus RISSA Stephens, 1825. 



Bissa tridactyla (Linnaeus). Kittiwake. 



Larus tridactylus Linnjetts, S. N., ed. 10, I, 1758, 136. 

 Rissa tridactyla Bonapabte, Comp. List, 1838, 62. 

 Popular synonyms : Wintee Gull. KrrnwAKE Guix. 



*Birds of Northeaitem Illinois, Bull, of the Essex Institute, Vol. VIII, 1876, 145. 



