GEN. 311-314 OF KEY. 113 



605. COLYMBUS TORQUATUS BRUNN. 

 toon; Groat 3fortlicrii IHvcr. 



605a. COLYMBUS TORQUATUS BRUNN., 



var. ADAMSII (Gray) Coues. 

 irelloiv-billcd to on. 



606. COLYMBUS ARCTICUS L. 

 ISlacK-tltroatcd Diver. 



606a. COLYMBUS ARCTICUS L., 

 var. PACIFICUS (Lawr.) Coues. 

 Pacific Diver. 



607. COLYMBUS SEPTENTRIONALIS L. 

 Red-tbroated Diver. 



608. PODICEPS OCCIDENTALS LAWR. 



Western O relic. 



608a. PODICEPS OCCIDENTALS LAWR., 

 var. CLARKII (Lawr.) Coues. 

 Clarke's Grebe. 



609. PODICEPS CRISTATUS (L.) LATH. 



Crested Grebe. 



610. PODICEPS GRISEIGENA (BODD.) GRAY, 



var HOLBOLLI (Reinh.) Coues. 

 Red-necked Grebe. 



611.*PODICEPS CORNUTUS (Gai.) LATQ. 

 Horned Grebe. 



612. PODICEPS AURITUS (L.) LATH., 



var. CALIFORNICUS (Heerm.) Coues. 

 American Eared Grebe. 



613. PODICEPS DOMINICUS (L.) 



St. Domingro Grebe. 



CHECK LIST BIRDS. 8 



