GEN. 311-314 OF KEY. 113 



605. COLYMBUS TOKQUATUS BRUNN. 

 Ijoon; Great jtfortlieru Diver. 



605a. COLYMBUS TOBQUATUS BRUNN., 



var. ADAMSII (Gray) Coues. 

 Yellow-billed I.oon. 



606. COLYMBUS ABCTICUS L. 

 Ulack-tbroated Diver. 



606a. COLYMBUS ABCTICUS L., 

 var. PACIFICUS (Lawr.) Coues. 

 Pacific Diver. 



607. COLYMBUS SEPTENTBIONALIS L. 



Red-throated Diver. 



608. PODICEPS OCCIDENTALS LAWR. 



Wetern Grebe. 



608a. PODICEPS OCCIDENTALS LAWR., 

 var. CLARKII (Lawr.) Coues. 

 Clarke's Grebe. 



609. PODICEPS CRISTATUS (L.) LATH. 



Crested Grebe. 



610. PODICEPS GBISEIGENA (BODD.) GRAY, 



var HOLBOLLI (Reinh.) Coues. 

 Red-necked Grebe. 



611. PODICEPS COBNUTUS (GM.) LATH. 



Horned Grebe. 



612. PODICEPS AUBITUS (L.) LATH., 



var. CALIFORNICUS (Heerm.) Coues. 

 American Eared Grebe. 



613. PODICEPS DOMINICUS (L.) 



t. Doming-o Grebe. 



CHECK LIST BIRDS. 8 



