42 
231. HYDROCHELIDON LARIFORMIS, {Linn.) Cones. 
Black Tern. 
But two specimens are recorded, both taken in the Spring. 
One on Seneca Lake, and one on Crooked Lake, N. Y.— Gilbert. 
Occurs on Owasco Lake, N. Y. 
232. COLYMBUS TORQUATUS, Briinn. 
Loon; Great Northern Diver. 
Not an uncommon Spring and Autumn migrant. 
233. COLYMBUS SEPTENTRIONALIS, Linn. 
Red-throated Diver. 
A not uncommon species. Has been taken on Owasco Lake, 
N. Y. 
234. PODICEPS GRISEIGENA, 
var., PIOLBOLLI, (Reink.) Cones. 
Red-necked Grebe. 
Taken on Cayuga Lake, N Y., March 4th, 1876. 
235. PODICEPS CORNUTUS, (Cm.) Lath. 
Horned Grebe. 
Common in the migrations. Taken Oct. 30th, 1877,011 Cay¬ 
uga Lake, N. Y. One taken on the Outlet of Owasco Lake, 
N. Y., by Mr. Geo. Fanning of Auburn, N. Y., in the Fall of 
1877. 
236. PODILYMBUS PODICEPS, (Linn.) Lawr. 
Pied-billed Grebe; Dabchick. 
A common Spring and Autumn migrant. A few breed. 
