540 NORTH AMERICAN BIRDS. 
b?, Wing less than 3.00. 
c. Outer toe much longer than the inner. 
d@', Exposed culmen shorter than tarsus; posterior lower parts whitish 
or pale cinnamon........ Raasadeaeveas seen Salpinctes. (Page 547.) 
ad, Exposed culmen longer than tarsus; posterior lower parts deep 
rusty or brownish, more or less speckled with dusky or whitish, 
OF DOth........ceeceeeeeeeeeceeeeeeneeens eae Catherpes. (Page 548.) 
c. Outer toe not distinctly longer than the inner. 
a, Tail little, if any, shorter than tarsus and middle toe together. 
é'. Nostril opening horizontally along lower edge of nasal fosse, 
and overhung by a more or less projecting scale-like mem- 
brane. 
f'. 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. Billrather abruptly decurved at tip, stout (or else tail 
decidedly longer than wing); a conspicuous, sharply 
_ defined (usually whitish) superciliary stripe. 
Wh’. Length of wing exceeding that of tail by 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- 
ciliary stripe not conspicuous (sometimes nearly 
obsolete)....... re Troglodytes. (Page 552.) 
f?. Back streaked with black and white; tail graduated for 
about one-third its length, the lateral pair of feathers 
reaching little, if any, beyond tips of longer under 
COVOL UA isis eyes vue taveceuene Cistothorus. (Page 555.) 
e. Nostril small and nearly circular, opening in the anterior por- 
tion of the nasal fossw, and without overhanging scale or 
membrane. (Otherwise, very much like Thryothorus.) 
Thryophilus? 
d’, Tail much shorter than tarsus and middle toe together. (Nostril 
as in Thryophtlus.)..cccoccsccsersevcsecacs Vesecsuviosswmaee ed Henicorhina$ 
1 Uropsila Scu. & Satv., Nom. Neotr, 1878, 155. Type, Troglodytes leucogastra Goutp. (Hab. Southern 
Mexico.) 
2 Thryophilus Barry, Review, i. August, 1864, 127. Type, Thryothorue rufalbue Larr. (Six species in 
Mexico and Guatemala, with others farther southward.) 
8 Henicorhina Scr. & Sanv., P. Z, S. 1868, 170. Type, Cyphorhinus leucostictus Caz. (Hab, Southern 
Mexico to northern South America.) 
