130 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



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

 more than 70 mm.). 

 c. Bill relatively longer, broader, and less compressed, its depth at fi-ontal 

 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 frontal 



antiae much greater than its width 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 am unable to avoid recognizing Yireosylmi and Lanlvireo as 

 genera without suppressing Neochloe and Laletes,' in fact, these two 

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

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



Genus VIREOSYLVA Bonaparte. 



Vireosylna Bonaparte, Ueog. and (,"(»mp. List, 1838, 26. (Type, Muscicapa oli- 

 vacea Linna?us. ) 



Vireosylrin (emendation) Bonaparte, Consp. Av., i, 1850, 329. 



PhyUomanex<i Cabanis, "Wiegmann's Archiv. fur Naturg., 1847, i, 321. (Substi- 

 tute for Vireui^ylru on grounds of purism.) 



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

 tary uiul 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 antitv not greater (usually uuich les.s) than half the distance 

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

 length of gonys; Aving 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 nearl}'' 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 primar}- 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 difference 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 (some'times nearl}^ 

 twice as long) as exposed culmen. 



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

 usually grayer or browner (sometimes distinctly brownj, the wings 

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

 lowish. 



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

 agos Archipelago. (Numerous si)ecies.) 



«"0t)A/lo/it<:j'?75, Laub liebend." 



