Mowat eal OBERHOLSER, Notes on N. A. Birds. III. 467 
Cymochorea Coues. 
The subgenus Cymochorea Coues! has recently been raised to 
generic rank to include all the species now under Oceanodroma 
Reichenbach, except the type of the latter, Oceanodroma furcata 
(Gmelin).? A careful examination of the species of Oceanodroma 
discloses the fact that there is no structural distinction between 
Oceanodroma furcata and the other species of the genus, with 
exception of the slightly scalloped tips of the rectrices and the 
rather narrower ends of the outer pair. Furthermore, these 
peculiarities are indicated in some specimens of Oceanodroma 
leucorhoa and Oceanodroma hornbyi, though never developed to so 
great a degree as in Oceanodroma furcata. Moreover, the difference 
in color between Oceanodroma furcata and the remaining species 
now included in the group is scarcely deserving of weight in 
generic separation, in view of the fact that species of such diverse 
coloration as members of the genus Pujfinus and its closely allied 
groups have been by previous authors, as well as by Messrs. 
Mathews and Iredale, and we think properly, placed in the same 
genus. In this particular case it seems to us that neither the slight 
and not wholly constant structural character of the rectrices, nor 
the somewhat different coloration is sufficiently important to entitle 
Cymochorea Coues to generic rank; and it, therefore, should 
remain, as at present, a subgenus of Oceanodroma. 
Sula dactylatra californica Rothschild. 
This new subspecies was recently described by Dr. Walter 
Rothschild * from San Benedicto Island, in the Revillagigedo group, 
off the coast of western Mexico. Its geographic range was given 
by the original describer as the “coasts of California and Central 
America,” but without any definite localities outside the Revilla- 
gigedo Islands. Since, therefore, there is no evidence that this 
new race has ever been taken in either California or Lower Cali- 
1 Cymochorea Coues, Proc. Acad. Nat. Sci. Phila., 1864, p. 75 (type by original designa- 
tion, Procellaria leucorhoa Vieillot). 
2 Cf. Mathews and Iredale, Ibis, ser. 10, III, No. 3, July, 1915, pp. 574-581. 
3 Bull. Brit. Ornith. Club, XX XV, No. CCIII, January 27, 1915, p. 43. 
