INSESSORES : TURDID^E. 169 



of yellowish olive-brown, and the tail is tinged with 

 purple. 



Wilson's Thrush, T. fusccscens, Stephens, of North 

 America east of the Missouri, is seven and a half inches 

 long, the wing four and a quarter inches ; the color above, 

 and on the sides of the head and neck, nearly uniform 

 light reddish-brown ; beneath, white, the fore part of the 

 breast and throat tinged with pale brownish-yellow ; and 

 the sides of the throat and the fore part of the breast are 

 marked with small obscurely denned triangular spots of 

 light brownish. 



The Oregon Thrush, T. ustulatus, Nutt, of the Pacific 

 coast, is seven and a half inches long, the wing three and 

 three fourths inches. 



The Olive-backed Thrush, T. Swainsonii, Cab., of East- 

 ern North America, Greenland, and southward to Peru, 

 and accidental in Europe and Siberia, is seven inches 

 long, the wing over four inches ; the color of the upper 

 parts uniform olivaceous, with a decided shade of green ; 

 the fore part of the breast and throat pale brownish-yel- 

 low, and the rest of the lower parts white ; the sides of 

 the throat and fore part of the breast with somewhat 

 rounded spots of well-defined brown. 



The Gray-cheeked Thrush, T. aides, Baird, of the Mis- 

 sissippi region to the Missouri, is nearly eight inches long, 

 the wing about four and a quarter inches ; the color above 

 dark olive-green, sides of the head ash-gray ; the under 

 parts white ; the sides of the throat, and the breast, with 

 arrow-shaped spots of dark plumbeous-brown. 



The Common Robin, T. migratorius, Linn., of all North 

 America to Mexico, is nine and three fourths inches long, 

 and the wing nearly five and a half inches ; and is so 

 well known that it needs no further description. This is 

 one of the most common and most interesting birds, com- 

 ing to the temperate districts early in the spring, and 

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