CATALOGUE OF CANADIAN BIRDS. 117 



Turdus fuscescens salicicolus. 



WILLOW THRUSH. 



Examples of this variety of Wilson's Thrush were taken by 

 Dr. COUES on the Souris Plains, near the 4Qth parallel. 



Turdus aliciae. 



GRAY-CHEEKED THRUSH. 



Occurs throughout Canada, north to the Arctics ; breeding in 

 high latitudes, and migrating across the southern border. 



Turdus aliciae bicknelli. 



BICKNELL'S THRUSH. 



The Rev. J. H. LANGILLE reports finding this variety of the 

 Gray-Cheeked Thrush abundant on Mud Island and Seal Island, 

 off the coast of Nova Scotia. 



Turdus ustulatus. 



RUSSET-BACKED THRUSH. 



An abundant summer resident along the Pacific coast, 

 occurring, also, in the interior of British Columbia. Winters in 

 Guatemala. 



Turdus ustulatus swainsonii. 



OLIVE-BACKED THRUSH. 



Occurs from the Atlantic border to the eastern base of the 

 Rockies, and north to the northern shore of the Gulf of St. 

 Lawrence and to the Great Slave Lake region ; rather rare 

 between Montreal and Lake Huron, but common to abundant 

 elsewhere. Breeds from about latitude 45 northward. 



