434 



WRENS, THRASHERS, ETC. 



3. Exposed culmen equal to or 

 longer than middle toe 

 without claw. 



Toxostoma. p. 437 



Fig. 547. 



V. Exposed culmen decidedly shorter than middle 

 toe without claw. 



4. Plumage light gray, marked with white. 



Mimus. p. 435. 



4'. Plumage slaty, not marked with white. 



Galeoscoptes, p. 437. 



Fig. 549. 

 1'. Rictal bristles not conspicuous. 



Fig. 550. 



2. Length 7-8 . Heleodytes, p. 442. 



2'. Length 3.50-6.50. 



3. Tail equal to or longer than wing ; tail mainly blackish. 



Thryomanes, p. 446. 



3'. Tail shorter than wing ; tail not mainly blackish. 

 4. Outside toe much longer than inner. 



5. Exposed culmen longer than tarsus ; 

 largely rusty brown. 



Catherpes, p. 444. 



5'. Exposed culmen shorter than tar- 

 sus ; largely grayish brown. 



Salpinctes, p. 443. 



Fig. 552. 

 4'. Outside toe not markedly longer than inner. 



5. Tail less than three fourths as long as wing. 



Olbiorchilus,p.449. 



5'. Tail more than three fourths 



as long as wing. 



6. Head without white supercil- 

 iary . Troglodytes, p. 448. 



Fig. 553. 



Fig. 554. 



6'. Head with white superciliary. 



Fig. 555. 



7. Back streaked with white. 



Cistothorus, p. 449. 



