130 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



hb. Bill larger and stouter, the culmen strongly decurved terminally; larger (wing 

 I more than 70 mm.), 



c. Bill relatively longer, broader, and less compressed, its depth at frontal 

 antise but little greater than its width at same point; color bright green 

 above, with blue on crown, or else a yellow superciliary stripe. 



Vireolanius (p. 221) 



cc. Bill relatively shorter, deeper, and more compressed, its depth at frontall 



antise much. greater than its widtlf at same point; color neither bright. 



green above, nor with blue on crown, nor with a yellow superciliary stripe,, 



the latter more or less rufescent Cyclarhis (p. 226 )i 



I am unable to avoid recognizing Yireosylva and Lanivireo as 

 genera witliout suppressing Neochloe and Laletes; in fact, these twO' 

 are structurally much nearer typical Yireo than are those first men- 

 tioned, which seem to me to be very well characterized groups. 



Genus VIREOSYLVA Bonaparte. 



Vireosyloa Bonapaete, (jeog. and Comp. List, 1838, 26. (Type, Muscicapa oli- 

 vacea Linnaeus. ) 



Vireosylvia (emendation) Bonapaete, Consp. Av., i, 1850, 329. 



Phyllomanes" Caeanis, Wiegmann'a Archiv. fiir Naturg., 1847, i, 321. (Substi- 

 tute for Vireosylva on grounds of purism.) 



Small or medium-sized Vireonidse with the tenth primary rudimen- 

 tarj' and concealed or else not more than one-third as long as the ninth, 

 narrow and pointed; ninth primary longer than fourth; depth of bill 

 at frontal antise not greater (usually much less) than half the distance 

 from nostril to tip of maxilla, the latter measurement at least equal to 

 length of gonys; wing without whitish bars or other markings. 



Bill very variable in relative size, sometimes as long as head, some- 

 times less than half as long; culmen usually straight, or nearly so, to 

 near tip, where rather abruptly decurved, the tip of maxilla distinctly 

 uncinate. "Wing rather long and pointed; tenth primary usually rudi- 

 mentary and wholly concealed; if present not more than one-third as 

 long as ninth, narrow and pointed; ninth primary equal to or longer 

 than fifth (sometimes longer than sixth) or else, in those species having 

 the tenth primary evident, longer than fourth; eighth and seventh, or 

 eighth, seventh, and sixth primaries longest; wing- tip equal to or 

 longer than tarsus. Tail much shorter than wing (the difl:erence at 

 least equal to length of tarsus), even, or very slightly emarginate or 

 double-rounded. Tarsus one-fourth as long as wing or less, much 

 longer than middle toe with claw, always longer (sometimes nearly 

 twice as long) as exposed culmen. 



Coloration. — Above plain olive, olive-green or grayish, the pileum 

 usually grayer or browner (sometimes distinctly brown), the wings 

 without white bands or other markings; under parts whitish or yel- 

 lowish. 



Range. — Whole of tropical and temperate .Vmerica except Galap- 

 agos Archipelago. (Nunaerous species.) 



a"(pvXXojx&vrfi, Laub liebend." 



