1904,] NATURA LSCI ENCES OF PHILADELPHIA. 585 



Sitta carolinensis aculeata (Cass.).ISlender-billed Nuthatch. 



Common. 



Parus gambeli Ridgw. Mountain Chickadee. 



Only on the mountain. 



Paras rufescens Towns. Chestnut-backed Chickadee. 



Common about the ranch. Fom- specimens too worn for satisfactory- 

 comparison. They seem, howcA^er, to be fairly intermediate in char- 

 acter between rufescens and neglectus. 



♦Chamaea fasciata subsp.? Wren Tit. 



A few in the brush. 

 Psaltriparus minimus (Towns.). Bush Tit. 



A few in the manzanita. One specimen obtained seems to be true 

 minimus. 



Regulus satrapa olivaceus Baird. Western Golden-crowned Kinglet. 



Some young observed in the firs on Mount Sanhedrin and a speci 

 men secured. 



Polioptila coerulea obscura Ridgw. Western Gnatcatcher. 

 Not common. 



*Hylociclila ustulata (Nutt.). Russet-backed Thrush. 



Edge of timber~and about the house. 



*Hylociclila guttata nana (Aud.). Dwarf Hermit Thrush. 



In high timber. Sings all day, but the song is not so beautiful as 

 that of the Sierran bird. 



Merula migratoria propinqua Ridgw. Western Robin. 

 Common, especially on ]\Iount Sanhedrin. 

 *Sialia mexicana occidentalis (Towns.). Western Bluebird. 



Common at a little lower elevation, but rare about the ranch. 



*Sialia arctica Sw. Mountain Bluebird. 



Only on Mount Sanhedrin. Xests in holes in trees. 



