145 



MORANT. A regular but rather uncommon migrant and sometimes a 

 winter resident. f 



290 a. Var. floridanus And. FLORIDA CORMORANT. A regular 

 summer resident in Southern Illinois, occasionally straying to the 

 northern portion of the state. A specimen of this variety was ob- 

 served in May, 1876, at Waukegan. I do not think G-. carbo occurs'in 

 this vicinity. 



Family LABIDJB. 

 Genus Stercorarius Briss. 



291. S. pomatorhinus \Tieill, POMARINE JAEGER. A rare win- 

 ter visitant to Lake Michigan. It was first observed by Mr. F. L. Eice 

 near Evanstoo and upon the strength of this introduced to the fauna 

 of the state. I am happy to record a second instance of its occur- 

 rence near Chicago, October 9th, 1876, when I observed a fine adult 

 specimen flying along the Lake shore, and so near that there could be 

 no possibility of mistake. -. 



Genus Larus Linn. 



292. L. glaucus Brunn. GLAUCUS GULL. A rather rare winter 

 visitant to Lake Michigan. Dr. Hoy has killed three specimens upon 

 the Lake near Racine, one of which is now preserved in his collection. 

 He has seen others during severe winters. 



293. L. leucopterus Fabr. WHITE-WINGED GULL.. A regular 

 and not uncommon winter resident on Lake Michigan. 



294. L. marimis Linn. GREAT BLACK-BACKED GULL. Not an un- 

 common winter resident upon Lake Michigan. The immature young 

 are greatly in excess of the adults. 



295. L. argentatus var. argentatus Brunn. EUROPEAN HER- 

 RING GULL. Very rare winter visitant to' the Lake. A single speci- 

 men, an adult female, was obtained in the Chicago Harbor March 27, 

 1876. Dr. Coues records two other specimens of this form obtained 

 in this country, one in Mr. Lawrence's private cabinet and the other 

 in the Cambridge Museum (see B. of N. W., p. 628). The Illinois 

 specimen has been examined by Dr. Coues and Mr. Ridgway and pro- 

 nounced by them to be identical with the European bird. The most 

 striking peculiarity is its small size and the white terminal space over 

 two inches long, upon the outer primary. The dimensions of my 

 specimen are as follows : length, 22-50; wing, 15-30; tarsus, 2-25; bill, 

 1-90. Iris hazel. 



295 a. Var. smithsonianus Coues. AMERICAN HERRING GULL. 

 Very abundant winter resident upon Lake Michigan, and occurs 

 throughout the state. Large numbers frequent the prairie near the 

 slaughter-houses, in the vicinity of Chicago, where they find a gene- 



