GEN. 311-314 OF KEY. 113 



605. COLYMBUS TORQUATUS Brunn. 

 liooii; threat Mortliei'ii ]>iver. 



605a. COLYMBUS TOBQUATTJS Brunn., 

 var. ADAMSii (Gray) Coues. 

 Yelloiv-Mlled lioon. 



606. COLYMBUS ARCTICUS L. 

 Jtlack-tln'oated ]>iver. 



606a. COLYMBUS ARCTICUS L., 

 var. PACiFicus (Lawr.) Coues. 

 Pacific IMver. 



607. COLYMBUS SEPTENTRIONALIS L. 



Recl-tliroated ]>iver. 



608. PODICEPS OCCIDENTALIS Lawr. 



TVestern CJreI»e. 



608a. PODICEPS OCCIDENTALIS Lawr., 

 var. CLARKii (Lawr.) Coues. 

 Clai'ke'is €}i*e1>e. 



609. PODICEPS CRISTATUS (L.) Lath. 



Crested Oretee. 



610. PODICEPS GRISEIGENA (Bodd.) Gray, 



var. iioLBoLLi (Reinh.) Coues. 

 Red-necked €}i*e1>e. 



en. PODICEPS CORNUTUS (Gm.) Lath. 

 Horned CJretoe. 



612. PODICEPS AURITUS (L.) Lath., 



var. CALiFORNicus (Heerm.) Coues. 

 American £ared Crrebe. 



613. PODICEPS DOMINICUS (L.) 



§t. Doiuing-o €rrel>e. 



Check List Birds. 8 



