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1914 BIRDS OF ARIZONA 79 



351. Polioptila plumbea (Baird). 



Plumbeous Gnatcatcher. 



Synonyms — Culich'ora plumbea; Polioptila melanura; Polioptila caerulea 

 var. plumbea. 



Status — Fairly common resident of the Lower Sonoran zone of southern, 

 western, and parts of northern Arizona. Found breeding in all the low valleys 

 south of the Mogollon Divide (Gila, Santa Cruz, San Pedro, etc.), north to 

 Fort Whipple (Cones, 1866a, p. 66) and Fort Mohave. Also reported in sum- 

 mer from Keam Canon, in northwestern Arizona (Fisher, 1903, p. 36). As it 

 has been taken at some of the northernmost ooints of record in Arizona during 

 the winter months, it is probably a permanent resident wherever it is found in the 

 state, though possibly there are slight local migrations. 



352. Myadestes townsendi (Audubon). 



Townsend Solitaire. 



Synonym — Ptilogonys townsendii. 



Statusi — Breeds in the Boreal zone of the San Francisco Mountains (Mer- 

 riam, 1890, p. 101) ; not known to do so elsewhere in Arizona, though it may 

 prove to be a summer visitant in some other of the higher ranges (Mogollon 

 Mountains, White Mountains, etc.). A pair of birds seen in the Huachuca 

 Mountains during June, 1910, under circumstances possibly indicative of their 

 breeding (F. C. Willard, MS). A common migrant in the Upper Sonoran and 

 Transition zones, observed at various points in eastern Arizona. Seen in north- 

 ern Arizona in January and February (Kennedy, 1859, p. 25). Has occurred 

 through the winter in the Santa Catalina Mountains ( Scott, 1888, p. 167). and in 

 the Dragoon Mountains (Osgood, 1903, p. 151). 



353. Hylocichla fuscescens salicicola Ridgway. 



Willow Thrush. 



Synonym — Turd us fuscescens salicicolus. 



Status — The only positive record for Arizona is that of a specimen taken by 

 Herbert Brown at Tucson, in May, 1882 (Scott, 1888, p. 167). Breninger (1901a, 

 p. 46) reported one as seen on the Pima Indian Reservation, south of Phoenix, 

 in September [1900?], but the bird was not taken. 



354. Hylocichla ustulata ustulata (Nuttall). 



Russet-backed Thrush, 

 Synonyms — Turdus ustulatus; Hylocichla ustulata swainsoni. 

 Status — Although there are singularly few records of the occurrence of this 

 species in Arizona, it is nevertheless a common migrant in the southern and 

 western parts of the state. The published records are as follows : Santa Rita 

 Mountains, May 17, 1881, one specimen (Brewster, 1882, p. 68); Fort Lowell, 

 May 21, 1884, one specimen (Brewster, 1885a. p. 85) ; Yuma, May, three speci- 

 mens (Morcom, 1887, p. 57) ; Huachuca Mountains, common migrant in the 

 spring (Swarth, 1904b, p. 63). Re-examination of specimens recorded as H. u. 

 szcainsoni (Swarth. 1. c.) shows them all to be examples of H. u. ustulata. 



