BIRDS COLLECTED IN CHINA, ETC. 247 



5. OBDER NATATORES.— The Swimming Birds. 



ANAS BOSCHAS, Linnieus.' 



Anas boschas, Linn. Syst. Nat. I, p. 205, (1766.) 

 The Mallard. 



Wilson Am. Orn. VIII, pi. TO, fig 7. Aud. B. of Am., pi. 221, oct. ed. VI, pi. 385. 

 From Benicia, California. Specimens in the collection present no points of difference from 

 the bird of the Atlantic coast. 



MABECA AMERICANA, (Gmelin.) 



Anas Americana, Gm. Syst. Nat. I, p. 526, (1788.) 



The American Widgeon. 



Wilson, Am. Orn. VIII, pi. 69, fig 4. Aud. B. of Am., pi. 345, oct. ed, VI, pi. 389. 



From Benicia, California. 



QUERQUEDULA CAROLLNENSIS, (Gmelin.) 



Anas Carolinensis, Gm. Syst. Nat. I, p. 533, (1788.) 



"Anas crecca," Wilson, Am. Orn. VIII, p. 101. 



The Green Winged Teal. 



Wilson, Am. Orn. VIII, pi. 70, fig 4. Aud. B. of Am., pi. 228, oct. ed. VI, pi. 392. 



From Benicia, California. 



FULIGULA MAELLA, (Linnfeus.) 



Anas marila, Linn. Syst. Nat. I, p. 196, (1766.) 



Anas frenata, Sparrmann Mus. Carls. 



The Scaup Duck, the Black Headed Duck. 



Wilson, Am. Orn. VIII, pi. 69, fig 3. Aud. B. of Am., pi. 229, oct. ed. VI, pi. 397. 



From Benicia, California. 



Very fine specimens of the four ducks preceding have afforded us an opportunity for careful 

 comparison with specimens from the Atlantic coast. They appear to he precisely identical in 

 all essential characters. 



TADORNA VULPANSER, Fleming. 



Tadorna vulpanser, Fleming, Brit. An. I, p. 122. 

 Anas tadorna, Linn. Syst. Nat. I, p. 195, (1766.) 

 The Sheldrake. 

 Gould, B. of Eur., pi. 357. 



From Macao, China. The specimen now before us has the pectoral band more narrow and 

 the bill more curved upwards than in European specimens, otherwise quite similar. 



LARUS FUSCUS, Llnnmus. 



Larus fuscus, Linn. Syst. Nat. I, p. 225, (1766.) 

 Gould, B. of Eur. V, pi. 431. 

 From the Cape of Good Hope. 



LARUS OCCIDENTALIS, Audubon. 



Larus occidentalis, Aud. Orn. Biog. V, p. 320, (1839.) 

 Larus niveus, Pallas Zoog. Rosso Asiat. II, p. 320, (1811) ? 

 Pallas Zoog. Ross. Asiat. pi. 86? 



