312 



KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



FAMILY TROQLODYTID^. 



Wrens and Thrashers. 



First primary, less tlian two thirds as long as third ; outer tail 

 feathers, decidedly shorter than middle ones, varying from one eighth 

 to one half inch or more shorter in different species. 



Group 1. Wing, less than 3.25 inches long. 



SUBFAMILY TROQLODYTIN/E. 

 Wrens. 



Small, brownish, plain colored birds. 



Part I. The following species have the crown or back without white 

 streaks or dots : — 



Tlivvotlinriis hewickii. 



Outer tail fenthers, tipped and marked 

 with graj'ish white: primaries, not 

 barred. Bewick's Wren. 



Thri/othorvs bei'nckii. 

 See No. 538. 



Underparts, grayish ; belly, grayish, not 

 speckled ; outer tail feathers, not broadly 

 tipped with grayish white; tail, over 1.25 

 inches long; primaries, showing narrow 1)ars. 



House Wren. 



Troglodytes aedoii, diul races. 

 See No. 539. 



