262 Field Museum of Natural History — Zoology, Vol. IX. 



Crown, back, and rump, dull 

 olive, or brownish olive; under 

 parts, buffy, or grayish, streaked 

 with brown on throat and sides; 

 outer tail feather, mostly white, 

 including the outer web; much 

 less white on second feather; hind 

 toe nail, usually as long as the 

 toe. Aiithiis nibescens. 



American Pipit. Titlark. 

 See No. 338. 



. Family TROGLODYTID^. Wrens. 



Small, plain-colored birds ; first primary, less than two-thirds as long 

 as third ; outer tail feathers, decidedly shorter than middle ones, vary- 

 ing from one-eighth to one-half inch or more shorter in different species ; 

 toes, not deeply cleft, the inner and middle toes being joined near the 

 base; no noticeable rictal bristles. 



* GROUP 1. Wing, less than 3.1^ inches Jong, 

 PART 1. The following species have the crown or upper back 



without white streaks or dots : — 



Thryomanes bewickii. 



Outer tail feathers, broadly 



tipped and marked with grayish 



white. Thryomanes bewickii. 



Bewick's Wren. 



See No. 343. 



* For directions for measurement, see page 21. 



