Vou. 11, Pt. 11] LOOMIS—A REVIEW OF THE TUBINARES 171 
Oceanodroma homochroa (Cowes): ASHY PETREL 
Coves—Cymochorea homochroa, I, 77, 90 
SaLvIN—Oceanodroma homochroa, 347, 355. 
GopMAN—Oceanodroma homochroa, xxxvi, 29, pl. 8. 
No specimens of the Ashy Petrel were secured by the Expe- 
dition. How far south the species ranges has not been ascer- 
tained. The most southerly occurrence known to me is that of 
a female (No. 6167 Mus. Vertebr. Zool., Univ. Calif.) in the 
vicinity of San Clemente Island, California. This bird came 
aboard the U. S. S. Albatross at night on April 8, 1904, and 
was captured by Mr. Loye Miller. So far as I am aware, there 
have been no captures north of Point Reyes, the known range 
of the species extending along the California coast between 
latitude 33° and 38° N. It has long been a matter of record 
that this petrel has bred on San Miguel Island. Recently 
Messrs. Howard Wright and G. K. Snyder have taken four 
eggs and a nestling with the parent birds on Santa Cruz Island.* 
Off Point Pinos, Mr. Beck has obtained it during its migra- 
tions; his latest autumn record is November 4. Southeast 
Farallon Island, as of old, appears to be the breeding strong- 
hold of this species. Mr. Arthur L. Bolton informs me that 
he found it more abundant on June 19, 1911, than during early 
July, 1896, when he accompanied me on a trip to the island, the 
stoppage of the egg traffic? apparently resulting in an increase 
of population. 
Almost without exception, the second primary is somewhat 
longer than the third, and in most instances the fourth is longer 
than the first, although the difference is often slight. Inde- 
pendent of wear, some specimens are darker than others; the 
upper parts vary from deep to dark mouse gray. In unworn 
plumage the wing-patch and inner secondaries are often very 
conspicuous, the hoary white edgings being especially prom- 
inent. The pale area on the under coverts of the wing varies in 
extent and in degree of whiteness, but is present throughout a 
series of one hundred and forty specimens, including one carry- 
ing remains of natal down. Albinistic feathers occur in several 
instances. 
Three Academy specimens from Southeast Farallon Island, 
taken September 15, 1911, well illustrate the passage from the 
1 Condor, 1913, v. 15, p. 
2 Cf. Proc. Calif. Acad. ae 2d ser., v. 6, p. 362. 
