BREWSTER : BIRDS OF THE CARE 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, wLich has not been pre- 

 viously reported from anywhere on the Peninsula; nor does Mr. Belding include 

 it in his Laud 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, I88I. The true home 

 oi 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 (Pall.). 

 Alaskan Yellow Warbler. 



Denaroeca aestiva (not Motacilla aestiva Gmklin) Belding, Proc. U. S. Nat. Mas., 



V. 1883, 53fi, part at least (Cape Region). 

 Deiulroirn aestiva (not Motacilla aestiva Gmelin) Bryant, Proc. Calif. Acad. Sci., 



2d ser., 11. 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 

 Jose del Cabo on April 17, 1882. This is the only specimen which I have 

 seeii from any part of Lower California. Mr. Nelson has recorded rubiginosa 

 frona as far sfiuth 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 Ridgw. 



Mangrove Warbler. 



Dendroeca vieilloti bryanti (not of Ridoway, Amer. Nat., VII. 1873, 006) Ridgwat, 

 Proc. U. S. Nat. Mus., IV. 1882, 414, 415 (crit. ; La Paz). Belding, Ibid., 

 V. 1883, 536 (La Paz; Pichalinque Bay; Espiritu Island ). 



D.[endroica] bri/anti $. castaneiceps Ridgway, Loc. cit., VIII. 1885, 350 (orig. descr. ; 

 type from La Paz). 



Dendroica bryanti castaneiceps Ridgway, Loc. cit., footnote (name only). Bkyant, 

 Proc. Calif. Acad. Sci., 2d ser., IL 1889, 309 (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. 



