JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 709 



chiefly from North Dakota and Manitoba northward and occasionally 

 farther south; casual as far east as South Carolina during migrations; 

 in winter to Middle America and northern South America. 



Special characters: Similar to H. fuscescens, but with upper parts 

 darker and more olive brown, and the streaks on throat and upper 

 breast averaging darker. 



The Willow Thrush is not uncommon during the migrations in 

 Illinois and probably Wisconsin, but from lack of material I am 

 unable to decide this question. Typical Illinois specimens of both 

 this form and H. fuscescens are represented in the Field Museum 

 collection as well as a number of intermediates. 



Messrs. Kumlien and Hollister say: "A single specimen taken at 

 Delavan, May 6, 1899, and identified by Mr. Wm. Brewster, is the 

 sole claim for introducing this race here. We are of the opinion that 

 a careful examination of the migrating fuscescens will, reveal numbers 

 of this form, especially, it would seem, in the western part of the state.'* 

 (Birds of Wisconsin, 1903, p. 126.) 



Its song is similar to that of the Wilson's Thrush. 



361. Hylocichla aliciae (BAIRD). 

 GRAY-CHEEKED THRUSH. 



Turdus alicice Baird, A. O. U. Check List, 1895, p. 317. 

 Distr.: Northern and eastern North America, breeding far north- 

 ward (Newfoundland, Labrador, Mackenzie region, Alaska, etc.), 

 migrating south, east of the Rocky Mountains to the Greater Antilles, 

 Central America, and northern South America. 



Adult: Upper parts, uniform olive, with little or no difference 

 between color of the back and tail; lores, grayish; middle of upper 



throat, middle of belly and under 

 tail coverts, white; sides washed 

 with olive gray; lower throat 

 and breast washed with faint 

 tinge of pale buff and thickly 

 marked with blackish arrow- 

 shaped spots. Sexes similar. 



Length, 7.45; wing, 4; tail, 

 3; bill, .52. 



The Gray-cheeked Thrush is 

 very common in Illinois and 

 Wisconsin during the migrations 

 in spring and fall. It resembles 



