318 CHECK-LIST OF NORTH AMERICAN BIRDS. 



[B 154, part, C $a,part, R $, part, C 12, part.} 



GEOG. DIST. Mountainous parts of the northeastern States (Cat- 

 skills, White Mountains, etc.) and Nova Scotia, migrating south in 

 winter. 



758. Turdus ustulatus NUTT. 



Russet-backed Thrush. 



Turdus ustulatus NUTT. Man. Orn. Land. B. ed. 2, 1840, 830 

 (cestulatus, err. typ. p. 400). 



[B 152, C 5 3, R 4> C ii.] 



GEOG. DIST. Pacific coast region of North America, from Alaska 

 to California, south in winter to northern Lower California, Mexico, 



and Guatemala. 



v 



758 a. Turdus ustulatus swainsonii (CAB.). 



Olive-backed Thrush. 



Turdus swainsonii CAB. Fauna Per. 1845-46, 187. 

 Turdus ustulatus /?. swainsoni RIDGW. Field & Forest, II. May, 

 l8 77> 195- 



[B 153, C 5, R 4 , C 13.] 



GEOG. DIST. Eastern North America, and westward to the Upper 

 Columbia River and East Humboldt Mountains, straggling to the 

 Pacific coast. Southward in winter to Cuba, Guatemala, Nicaragua, 

 Colombia, Ecuador and Peru. Casual in Bermuda. Breeds in the 

 northern Alleghanies, the Catskills, the mountainous parts of southern 

 New England, southern Sierra Nevada, and northward. 



759. Turdus aonalaschkae GMEL. 



Dwarf Hermit Thrush. 



Turdus aonalaschka GMEL. S. N. I. ii. 1788, 808. 



[B 150, C 4 J, R 5, C 8.] 



GEOG. DIST. Pacific Coast region, from Alaska to Lower Cali- 

 fornia and western Mexico, east during migrations, to Nevada and 

 Arizona. Breeds from the southern Sierra Nevada in California 

 northward. 



