JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 177 



No blue on plumage anywhere; greater part of crown, dusky; 

 breast and belly, gray; throat, lighter. Perisoreus canadensis. 



Canada Jay. 

 See No. 219. 



GROUP 2. Wing, 5.50 to 6.50 inches long. 



Upper parts, pale blue, or purplish blue; tail, bright blue, barred 

 with black and (except middle feathers) tipped with white; wings, 

 blue, marked with white; under parts, ashy white; breast, with black 

 band. Cyanocitta cristata. 



Blue Jay. 

 See No. 218. 



Forehead, throat, and sides of head, dull white; back of crown 

 and nape, blackish; back, gray; under parts, ashy, palest on the 

 throat. Perisoreus canadensis. 



Canada Jay. 

 See No. 219. 



GROUP 3. Wing, 6.50 to 8.50 inches long. 



Head and breast, black; tail, long, showing more or less green 

 and purple reflections. Pica pica hudsonica. 



American Magpie. 

 See No. 217. 



General plumage, ash gray, becoming white on front of head; 

 most of tail, white except the two middle feathers which are black; 



