1914 • BIRDS OF ARIZONA 81 



360. Sialia sialis fulva Brewster, 



Azure Bluebird. 



Synonym — Sialia sialis azurea. 

 \ Status — Rare in summer in the high mountains of extreme southern Arizona: 

 Santa Rita Mountains, June 18 and 20, 1884, three specimens (Brewster, 1885a, 

 p. 85); Huachuca Mountains (Ridgway, 1907, p. 146). The latter record, ac- 

 cording to information received by me from Mr. W. W. Cooke, is based upon a 

 specimen taken by Dr. A. K. Fisher, at Fort Huachuca, April 30, 1892. The 

 species is not of regular or of common occurrence in either of these mountain 

 ranges, where Sialia mexicana hairdi is the common breeding bluebird ; in fact 

 the above records are the only ones known to me, though the region has been 

 visited frequently by collectors. 



361. Sialia mexicana bairdi Ridgway. 



Chestnut-backed Bluebikd. 



Synonyms — Sialia occidentalis ; Sdalia mexicana; Sialia mexicana occiden- 

 talis. 



Status — Common resident in high Transition in the mountains of northern 

 and eastern Arizona, ranging west to the Hualpai Moimtains (Stephens, 1903, 

 p. T05). Also definitely reported as occurring in summer on San Francisco Moui»- 

 tain, and in the Mogollon, Chiricahua, Santa CaLalina, and Huachuca ranges. Of 

 more general distribution during the vv'inter: still to be found in the high ranges 

 of southern Arizona, but in the valleys and plains also, and along the Colorado 

 River. 



362. Sialia currucoides (Bechstein). 



Mountain Bluebird. 



Synonym — Sialia arctica. 



Status — A summer visitant of the higlier mountains north of the Mogollon 

 Divide. Reported as breeding in the San Francisco and Mogollon mountains 

 (Meams, 1890a, p. 264). Occurs during the winter at Fort Whipple, along the 

 lower Colorado River, and in the valleys of southern Arizona — Tucson, San 

 Pedro River, etc. 



HYPOTHETICAL LIST 



I. Colymbus auritus Linnaeus. 



Horned Grebe. 



Synonym — Podiceps cor nut us. 



Status — Known only from the records by Coucs of its occurrence on the Col- 

 orado River (1866a, p. 100), and at Fort Grant (1868, p. 84), statements which 

 are not sufficiently explicit. 



