NORTHWESTERN MEXICO. 3^5 



281. Chaulelasmus streperus (Linn.). 

 Mazatlan, Grayson. 



"Abundant from November until late in spring." 



282. 3£areea americana (Gra.). 

 Mazatlan, Grayson. 



" This species is abundant from November until late in the spring." 



283. Aix sponsa (Linn.). 

 Mazatlan, Col. Abert. 



284. Cairina moschata (Linn.). 

 Mazatlan, Grayson ; Rio Zacatula, Xantus. 



"The wild Muscovy Duck is quite common in this locality throughout the year; breeds and perches in 

 trees." 



285. Aytha valUsneria (Wils.). 

 Mazatlan, Grayson. 



" Not uncommon during the winter months." 



286. Aytlia americana Eyton. 

 Mazatlan, Grayson. 



287. Bucejihala americana (B^i.) 

 Mazatlan, Grayson. 



» Common in the winter months." 



In his notes Col. Grayson gives B. harrovii as found at Mazatlan, but not common ; 

 there is no specimen of it in his collection, and as it is strictly a northern species, I think it 

 probable there was an error in its identification. 



288. FuUx marila (Linn.). 

 Mazatlan, Grayson. 



" Found in the winter months." 



289. FuUx affinls Eyton. 

 Mazatlan, Grayson. 



290. FuUx collurh (Don.). 



Mazatlan, Grayson ; Rio de Coahuana, Xantus. 



291. Erlsmatura ritblda (Wils.). 

 Mazatlan, Tepic, Grayson. 



"But seldom seen in tlie vicinity of Mazatlnn." 



