VON NYE] Ninth Supplement to the A. O. U. Check-List. 103 
Gros, Dist.— South Pacific. Accidental near Guadalupe 
‘Island, Lower California. (Ci Anruony, Auk, XV, Jan. 
1898, 39.) 
129. Merganser americanus (Cass.). 
By a typographical inadvertence in the 2d, ed. of the Check- 
List the concordance of this species was left blank. (C/ Cours, 
Auk, XIV, 1897, 316.) The figires should stand as in the 1st 
ed. of the Check-List, namely : 
[PeOrt aC Han O26 © 743. 
The subgenera Chaulelasmus, Mareca, Nettion, and 
Querquedula (Check-List, 2d ed., pp. 49-51) are raised to the 
rank of genera. Hence Nos. 135 to 141 will stand as follows: 
135. Chaulelasmus streperus (LINN.). 
Anas strepera Linn. S, N. ed. to, I, 1758, 125. 
Chaulelasmus streperus BoNAv. Geog. and Comp. List, 1838, 
56. 
156, Miareca penelope (LINN.). 
Anas penelope LINN. 5S. N. ed. 10, I, 1758, 126. 
Mareca penelope SrLvy, Br. Orn. IT, 1833, 324. 
137. Miareca americana (GMEL.). 
Anas americana GMEL. Syst. Nat. I, ii, 1758, 526. 
Mareca americana SveruENs, Gen. Zool. XII, ti, 1824, 135. 
[138.] Nettion crecca (LINN.). 
Anas crecca Linn. S. N. ed. 10, I, 1758, 126. 
Nettion crecca Kaur, Skizz. Entw.-Gesch. Eur. Thierw. 
1829, 95- 
139. Nettion carolinensis (GmMiv.). 
Anas carolinensis GMEL. S. N. I, 1788, 533. 
Nettion carolinensis Baird, Bds. N. Am. 1858, 777: 
