3o<) Imi'I.i) Muskum of Natural History — Z()(')looy, Vol. IX. 



sloughs, wet marshes and lakes, but seldom found (jn Lake Michigan, 

 and probably only during migrations; arrives in Wisconsin, of an 

 average year, the first few days of May — dates of arrival for a num- 

 ber of years at Lake Koshkonong range from Ai)ril ib to May ii — 

 and departs early, few being seen after the middle of September. 

 When they arrive in the spring all are in the black, full breeding 

 plumage; and all are in the white winter plumage before they leave; 

 in fact, a great many begin to assume their winter plumage before 

 they are through nesting." (Birds of Wisconsin, 1903, p. 14.) 



30. Hydrochelidon leucoptera (Meis.v. & Sciiixz). 

 White-wixged Black Terx. 



Distr.: Eastern hemisphere, accidental in North America (one 

 record, Wisconsin ) . 



Special characters, adult: Head, neck, and under parts, black; 

 upper parts, plumbeous; entire tail and upper and lower tail coverts, 

 white; anterior lesser wing coverts, white; legs and feet, red. 



Length, about g; wing, about 8; bill, about .90. 



"The only known instance of the occurrence of this European 

 species on the Western Continent is that of a breeding female shot by 

 L. Kumlien in a large marsh near Black Hawk Island, Lake Kosh- 

 konong, July 5, 1873. The specimen was sent freshly skinned to Dr. 

 Brewer, and was presented by him to the National Museum." (Kum- 

 lien and Hollister, Birds of Wisconsin, Bull. Wisconsin Nat. Hist. 

 Soc, 1903, p. 14.) 



