Catalogue of the Birds of Illinois. 
203 
Order PYGOPODES. 
Family PODICIPEDIDJE. 
Genus Podiceps, Latham. 
335. P. holbolU , Reinh. American Red-necked Grebe. Winter sojourner. 
Genus Dytes, Kaup. 
*336. D. auritus (Linn.) Ridgw. Horned Grebe. Chiefly transient, but 
wintering southward and a few breeding northward. 
337. D. nigricollis calif ornicus (Heerm.) Ridgw. American Eared Grebe. 
Winter sojourner. 
Genus Podilymbus, Lesson. 
/ *338. P. podiceps (Linn.) Lawr. Thick-billed Grebe. Summer sojourner 
northward; resident in southern counties. 
Family COLYMBID^E. — Loons. 
Genus Colymbus, Linnaeus. 
*339. C. torquatus, Briinn. Great Northern Diver; Loon. Chiefly winter 
sojourner, but nests very sparingly in extreme northern portion of the state. 
340. C. arcticus, Linn. Black-throated Diver. Rare winter visitant. 
341. C. septentrionalis , Linn. Red-throated Diver. Winter sojourner. 
