NORTHWESTERN MEXICO. 319 



Fam. PoDioiPiDiE. 



314. Podilynibus podiceps (Linn.). 

 ManzaniEa Bay, Xantus. 



"A winter visitant, but not abundant." 



315. Podiceps auritus var. californicus Heerm. 

 Guyamas, Dr. Palmer. 



316. Sylheocydus dominicus (Linn.). 

 Mazatlan, Grayson. 



«An abundant and common species in all fresb water ponds of this locality and Tepio, the entire year." 



