540 NORTH AMERICA X BIRDS. 



b\ Wing less than 3.00. 



c*. Outer toe much longer than the inner. 



(T. Exposed eulmcn shorter than tarsus; posterior lower parts whitish 



or pale cinnamon Salpinctes. (Page 547.) 



cP. Exposed culnien longer than tarsus; posterior lower parts deep 

 rusty or brownish, more or less speckled with duskj' or whitish, 



or both Catherpes. (Page 548.) 



<f. Outer toe not distinctly longer than the inner. 



d'. Tail little, if an}-, shorter than tarsus and middle toe together, 

 e'. Nostril opening horizontally along lower edge of nasal fossae, 

 and overhung by a more or less projecting seale-liko mem- 

 brane. 

 /'. Back without streaks; tail graduated for less than one- 

 third its length, the lateral pair of feathers reaching 

 decidedly beyond tips of longest under coverts. 

 g^. Bill rather abruptly decurved at tip, stout (or else tail 

 decidedly longer than wing) ; a conspicuous, sharply 

 defined (usually whitish) superciliary stripe. 

 A'. Length of wing exceeding that of tail b}' less 

 than length of exposed culmen (tail some- 

 times equal to or even longer than wing). 



Thryothorus. (Page 549.) 

 h'. Length of wing exceeding that of tail by much 

 more than length of exposed culmen. 



Uropsila} 



g''. Bill more slender, more gradually decurved at tip 



(sometimes nearly straight throughout) ; super- 



ciliarj' stripe not consjiicuons (sometimes nearly 



obsolete) Troglodytes. (Page 552.) 



_p. Back streaked with black and while ; tail graduated for 

 about one-third its length, the lateral pair of feathers 

 reaching little, if any, bcA-ond ti]is of longer under 



coverts Cistothorus. (Page 555.) 



e". Nostril small and nearlv circular, o]H'iiing in the anterior por- 

 tion of the nasal fossa;, and without overhanging scale or 

 membrane. (Otherwise, very much like Thri/othorus.) 



ThryophUits} 



<P. Tail much shorter than tarsus and middle toe together. (Nostril 



as in Thryophilus.) Henicorhina? 



I Uropoila Scu A S.\LV., Xom. Ncotr. 1S7.3, 155. Type, Troglodytct leucojanlnt Gould, [ffnb. Southern 

 Mexico.) 



» Thrynphilm BAinn, Review, i. Auijiift. IPfil, 127. Typo, Thrijothortu riifalhut Lapb. (Six species in 

 Mexico nn'l (<imtemnln, willi other? further southward.) 



' Jh,ilcorhiua ?ch. A Salv., P. Z. S. 186?, 170. Type, Ci/phorhinut Iciicottictif Cab. (Bab. Southern 

 Mexico to northern Suuth Aiucrica.) 



