ORDER PYGOPODES. 23 



Range. — Western North America. Breeds from central British Columbia, 

 Great Slave Lake, and Manitoba south to southern California, northern 

 Arizona, northern Nebraska, and northern Iowa; winters from central Cali- 

 fornia to Cape San Lucas and Guatemala; east to Kansas in migration; 

 casual in Missouri, Indiana, and Ontario. 



StTBGBNTTs TACHYBAFTUS Reichenbach. 



Tachybaptus Reichenbach, Avium Syst. Nat., 1849, pi. ii. Type, 

 by orig. desig., Colymbus minor Reichenbach = C.ruficollis Pallas. 



Colymbus dominicus Linn^us. 

 Range. — Subtropical and tropical America. 



a. [Colymbus dominicus dominicus. Extralimital.] 



b. Colymbus dominicus brach^pterus Chapman. Mexican Grebe. [5.] 



Colymbus dominicus brachypterus Chapman, Bull. Amer. Mas. N. H., XII, 

 1899, 256. (Lomita Ranch, Lower Rio Grande, Texas.) 



Range. — Southern Lower California and southern Texas south to Panama. 



Genus PODILYMBUS Lesson. 



Podilymbus Lesson, Traits d'Om., 1831, 595. Type, by monotypy, 

 Podiceps carolinensis Latham = Colymbus podiceps Linn^bus. 



Podilymbus p6diceps (Linnaeus). Pied-biUed Grebe. [6.] 



Colymbus podiceps Linn^xjs, Syst. Nat., ed. 10, 1, 1758, 136. (Carolina.) 



Range. — North and South America. Breeds from British Colum- 

 bia, southern Mackenzie, southern Keewatin, Quebec, and New 

 Brunswick south to Chile and Argentina, but often rare or local; 

 winters from Washington, Texas, Mississippi, and Potomac Valley 

 southward. 



