42 bulletin: museum of comparative zoology. 



though " Dr. Cooper found it common . . . along the whole Pacific coast " 

 to the northward of Lower California.^ The southern limits of its range 

 in winter appear to coincide rather closely with those of the Ked-breasted 

 Merganser. 



Anas boschas Linn. 

 Mallard. 



Anas boscas Ridgway, Proc. U. S. Nat. Mus., V. 1883, 5-34, footnote (San Jose' del 

 Cabo). Belding, Ibid., VI. 1883, 352 (s. of lat. 24° 30'). 



A7ias boschas Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 265 (San Jose' del 

 Cabo; Cape Region). 



The Mallard, also, was obtained in winter at San Jos6 del Cabo by ]Mr. 

 Xantus, and it was " shot at several localities " south of latitude 24° 3(V, by 

 Mr. Belding, who, according to Mr. Bryant, has found it breeding in the San 

 Rafael Valley. Mr. Anthony states that " quite a number were nesting in the 

 large meadows on the top of the mountain " San Pedro Martir, in May, 1893.^ 

 Mr. Bryant does not appear to have personally met with the bird in Lower 

 California, nor was Mr. Frazar more fortunate, from which it seems safe to con- 

 clude that it is not a common or at least generally distributed species on the 

 Peninsula. This must be due to conditions other than those of latitude, for on 

 the mainland it occurs numerously throughout Mexico and, indeed, ranges as 

 far southward as Panama. 



Chaulelasmus streperus (Linn.). 

 Gadwall. 



Chaulelasmus streperus Ridgway, Proc U. S.Nat. Mus., V. 188.3, 534, footnote (San 

 Jose' del Cabo). Belding, Ibid., VI. 1883, 351 (La Paz and s.). 



Anas strepera Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 265 (San Jose' del 

 Cabo). 



Mr. Xantus found the Gadwall at San Jose del Cabo in January and Feb- 

 ruary, and Mr. Belding records it as " very common " in winter and early 

 spring near La Paz and to the southward. Mr. Frazar found it " abundant " 

 at San Jose del Cabo in the autumn of 1887, and notes its arrival on Septem- 

 ber 27, its increase in numbers up to October 11, and its somewhat diminished 

 numbers on October 26. He makes no mention of its occurrence in Novem- 

 ber. No specimens are included in his collection. 



Colonel Grayson found ^ the Gadwall " abundant from November until late 

 in the spring in the neighborhood of Mazatlan," on the west coast of Mexicc. 

 It breeds as far south as San Pedro, California, according to Dr. Cooper. 



1 Baird, Brewer, and Ridgway, Water Birds N. Amer., II. 1884, 122. 



2 Zoe, IV. 1893, 2.30. 



8 Baird, Brewer, Ridgway, Water Birds N. Amer., I. 1884, 508. 



