JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 271 



Family TURDID^. Thrushes, Bluebirds, etc. 



First primary, very short; tarsus, booted (no scales showing, ex- 

 cept near the toes ) ; bill, shorter than head ; tip of upper mandible 

 with small notch. 



* GROUP 1. Wing, from 3.25 to 4.75 inches long. 



PART 1. The following species have the under parts more or less 

 streaked or spotted : 



Thrush. 



Back, rump, and upper tail coverts, olive, about the same color; 

 eye ring, cheeks, and lores, pale buff ; no white on wing coverts. 



Hylocichla ustulata swainsonii. 

 Olive-backed Thrush. 

 See No. 362. 



* For directions for measurement, see page 21. 



