ZOOLOGICAL DEPARTMENT. 29 



sional in spring in Monroe Co." (Jerome Trombley); ''Keweenaw Point" (Kneeland); 

 " breed near Escanaba" (Prof. Ludwig Kumlein). 



GENUS XEMA LEACH. 



24-62-(790). Xema sabinii (Sab.). SABINE'S GULL; FORKED-TAILED GULL,. 

 "Lake Michigan" (Butler's Birds of Ind.); 4i south to New York " (Jordan). 



SUBFAMILY STERNIN^E. TERNS; SEA SWALLOWS. 

 GENUS GELOCHEL1DON BKEHM. 



25-63 (792). (xclochelidon nilotica (Hasselq.). GULL-BILLED TERN; MARSH TERN. 



Rather common; " a straggler and rather rare in Kalamazoo county " (Dr M . Gibbs); 

 Great Lakes; often abundant on Lake Michigan; "often common on Lake Erie" (Jer- 

 ome Trombley); "Ohio, Illinois and Michigan" (Butier's Birds of Indiana p. 108); 

 " breeds on St. Clair Flats" (A. B. Covert); N. A. Eddy has found it common on Saginaw 

 river in January. 



GENUS STERNA LINN. 



26-64-(793). Sterna tsehegrava Lepech. CASPIAN TERN. 



Very rare; probably a straggler; one taken by the late W. H. Collins of Detroit is 

 now in the National Museum; Great Lakes; winter; "taken repeatedly at Mackinac 

 Island, identification certain" (S. E. White); said to breed on islands of Lake Michigan 

 (see Davie's Nests and Eggs of North American Birds, p. 33). Prof. Ludwig Kumlein 

 has taken several sets of eggs at Green Bay, Wisconsin. 



27-65 (794). Sterna maxima Bodd. ROYAL TERN; CAYENNE TERN. 



Rare; spring and summer; Lake Michigan; "rare summer visitant, occasionally 

 taken on Lake Michigan in late spring" (Gibbs' Birds of Michigan); common at Mack- 

 inac Island" (S. E. White); "Upper Peninsula" (A. H. Boies); see Butler's Birds of 

 Indiana, p. 108. 



28-69 (798). Sterna forsteri Nutt. FOSTER'S TERN. 



Not common; spring, summer and autumn: "Hillsdale county" (A. H. Boies); 

 "breeds on St. Clair Flats" (A. B. Covert); "breeds freely in Upper Peninsula" (Prof. 

 Ludwig Kumlein); "breeds on shore of Lake Superior" (H. Nehrling). 



29-70-(797). Sterna hirundo Linn. COMMON TERN; WILSON'S TERN; SEA SWALLOW. 

 Common; migrant; "Saginaw Bay" (N. A.Eddy); "common on Lake Erie" (Jerome 

 Trombley); "breeds on St. Clair Flats" (A. B. Covert); "throughout the summer in 

 northern Indiana, where it may breed" (Butler's Birds of Indiana); "Keweenaw Point" 

 (Kneeland); "breeds in Upper Peninsula" (Porf. Ludwig Kumlein); nests on ground; 

 eggs four, very variable, often pinkish drab, spotted with brown or gray; nests rude. 

 This bird is embraced in Dr. A. Sager's list of 1839. 



30-71-(799). Sterna paradisaea Brunn. ARCTIC TERN. 



"Not a common migrant" (Gibbs' Birds of Michigan); "south to New York" 

 (Jordan); -'sometimes breeds at Lake Koshkonong, Wis." (Prof. Ludwig Kumlein). 



