KEY TO FAMILIES. — LAND BIRDS. 



Part 2. Tip of upper mandible, not notched or hooked. 



137 



Bill, as illustrated; back, brown; rump, with 

 couoealod white spots; outer tail feathers, shortest; 

 tarsus, scutellate. 



Family TROGLODYTID/E. Wrens. 



See page 312. 



Bill, as illustrated; back, gray or bluish gray; uos- 

 trils, coiieealed by tults of bristly feathers. 



Family PARID^. 



Subfamily SITTIN/E. Nuthatches. 



See page 317. 



Bui, as illustrated; throat, black; erown, black 

 and uo rufous brown on sides (Chickadee), or forehead, 

 black; sides, with rufous brown (I'itmouse). 



Family PARID/E. Chickadees and Titmice. 552 



See page 318. 



Section 2. First primary, not short, always more than 



half as long as third. 



Part 1. Tip of upper mandible, with small but distinct hook or notch. 



Bill, flattened and wide at 

 base ; numerous black bristles at 

 base of bill; back of tarsus, rounded; 

 wing, longer than tail. 



Top ot bill. 



353 



Side of bill. 



Family TYRANNID^. Flycatchers. 



See page 200. 



