BREWSTER: BIRDS OF THE CAPE REGION, LOWER CALIFORNIA. 181 
mens of sonorana, besides a male in nearly full nuptial plumage obtained at La 
Paz on February 5, and also referable to this form, which has not been pre- 
viously reported from anywhere on the Peninsula; nor does Mr. Belding include 
it in his Land Birds of the Pacific District, although it occurs, at least casually, 
in the extreme southern part of California, for I have a female (No. 6,349) 
taken by Mr. F. Stephens at Riverside on September 14, 1881. The true home 
of sonorana is, however, southern Arizona and western Mexico, the most south- 
ern locality from which I have received specimens being Alamos, Sonora. 
Dendroica aestiva rubiginosa (PAtxt.). 
ALASKAN YELLOW WARBLER. 
Denaroeca aestiva (not Motacilla aestiva GMELIN) Bevprne, Proc. U. S. Nat. Mus., 
V. 1883, 536, part at least (Cape Region). 
Dendroica aestiva (not Motacilla aestiva GMELIN) Bryant, Proc. Calif. Acad. Sci., 
2d ser., II. 1889, 309, part at least (Cape Region). 
Of this form of the Yellow Warbler, characterized by the nearly uniform 
dark olive green of the upper parts which almost completely overlies and 
obscures the yellow on the rump and crown, the National Museum collection 
possesses a perfectly typical female (No. 87,531) taken by Mr. Belding at San 
José del Cabo on April 17, 1882. This is the only specimen which I have 
seen from any part of Lower California. Mr. Nelson has recorded rubiginosa 
from as far south as the Tres Marias Islands, where it occurs, of course, only as 
a migratory visitor. According to its describer, Mr. Oberholser,} it breeds from 
British Columbia to Alaska. 
Dendroica bryanti castaneiceps Rivew. 
MANGROVE WARBLER. 
Dendroeca vieilloti bryanti (not of Ripaway, Amer. Nat., VII. 1878, 606) Rrpewary, 
Proc. U. S. Nat. Mus., IV. 1882, 414, 415 (crit.; La Paz). Brxpine, Jbid., 
V. 1885, 556 (La Paz; Pichalinque Bay; Espiritu Island j. 
D. [endroica] bryanti B. custaneiceps Ripeway, Loc. cit., VIII. 1885, 350 (orig. descr. ; 
type from La Paz). 
Dendroica bryanti castaneiceps RipGway, Loc. cit., footnote (name only). Bryant, 
Proce. Calif. Acad. Sci., 2d ser., II. 1889, 809 (La Paz; Pichalinque Bay ; 
Espiritu Santo Island). 
Two of the five males taken by Mr. Frazar agree closely with Mr. Ridgway’s 
description of the type, and two disagree in having the breast and sides dis- 
tinctly but finely streaked with chestnut rufous. The fifth (No. 15,087, La 
Paz, February 7, 1887), which probably represents some unusual if not abnormal 
phase of coloration, differs very decidedly from the others as well as from all 
1 Auk, XIV. 1897, 78. 
