358 



NOKTIl AMEKR'AN BIRDS. 



Lanivireo. Bill compressetl, stout ; culnien arched IVom the base, commis- 

 sure curved. Superciliary stripe stopping at posterior angle of the eye and 

 curving under it, enclosing the eye in a conspicuous orbital ring, interrupted only 

 in Iront. Two conspicuous white bands on the wing. 



a. No spurious primary ......... Sp. Jlavi/rons. 



b. With an acute sjjurious primary .... Sp. suJitarius, plumheus. 

 Vireo. Bill stout, scarcely cotnpressed, ^-ub-cyliudrical. First primary not 

 spurious, or, if so, not acute. 



(I. Two conspicuous light bands on wing . Sp. ofn'cnpiilus^ novchoracensin^ huttoni. 

 h. One distinct light band on wing, and this not sharply delined, the anterior 



one beinu: ahnost obsolete 



Sp. belliy pusiUiDi, viciuiur. 



SuBtJEXUS V, 



^OSYLVIA, Bon. 



Vircnxiih'in, Box. rf,«og. Coiiip. List, 1838. (Typo, M use icapa oli caeca, Lix.) 

 riijjlloinnars, Cvn. Arch. 1847, I, 321. (No type mcutioued ; name proposed as substitute 

 for Vircosylcut.) 



Gkx. Cii.\r. Wings long and pointed, one third or one fourth longer than the nearly 

 even or slightly rounded tail. Fi'st quill very small (less than one third the second), some- 

 times apparently wanting. Second quill longer than the seventh, much longer than the 



Vireo olivticeus. 



secondaries. Tarsi short (scarcely exceeding .70 of an inch) ; toes rather long. Body 

 slender and elongated. Bill slender, narrow, straight ; the culmen straight for its biusal 

 half, the connnissure quite straight ; light horn-color, paler beneath. Feet weak. Type, 

 V. oUvaceus. 



Species and Varieties. 



CoMMox Characters. All .species olive above, wdiito or yellowish beneath. 

 .\n nshy or brownish cap, contrasting more or less abruptly with the olive back. 

 A whitish superciliary stripe extending to th(> nape, and a dusky one to and be- 

 hind the eye. No light bands on the coverts. Inside of wings (Hanks some- 

 times) and crissum yellowish, otherwise usually white beneath. 



No spurious primary Series I. 



A spurious primary Series IT. 



Series I. {Xo spurious jirimury.) 



A, A dusky " mustache" or cheek stripe along each side of the throat. 

 1. V. calidris. Eves red ? 



a. No distinct dusky lino along si<le of (he crown. 



Light stripes of the head dingy brownish-buff; crown scarcely 

 ashy; back olive-brt)wn ; crissum and lining of the wing pure pale 



