482 NORTH AMERICAN BIRDS. 



p. Bill slender, its greatest depth less than half the distance 



from nostril to tip, or else' width at base much greater 



than its depth, and tarsus with whole of outer side 



very distinctly scutellatc. 



g^. Tail even or emarginate, usually very much shorter 



than wing (the difference usually exceeding length 



of tarsus)' Dendroica. (Page 492.) 



g'. Tail more or less rounded or graduated (or else with 



basal two-thirds hidden by coverts), never very 



much shorter than wing (sometimes longer), the 



difference never exceeding length of tarsus. 



h}. Lower parts whitish, conspicuously streaked with 



grayish brown or dusky, above plain brown 



or dusk}', the head sometimes striped. 



Seiurus. (Page 518.) 



W. Lower parts 5'ellow or huffy, sometimes ashy, or 



mixed ashy and black, anteriorly ; above plain 



olive, olive-green, or grayish. 



i}. Bill straight ; above olive or olive-green, the 



head sometimes grayish. 



Geothlypis. (Page 520.) 

 i'. Bill decidedly curved ; above gray (the head 

 yellowish olive-green in one species). 



Terctistris? 



p. Bill stout but much compressed, its greatest depth not less 



than half its length from nostril to tip; width at base 



not greater than depth ; outer side of tarsus smooth 



or " booted" for upper half, at least. 



^'. Wing 2.90, or more ; above, including tail, olive or 



olive-green ; beneath yellow for anterior, white 



for posterior, half; no white on tail-feathers. 



Icteria. (Pago 526.) 



g^. Wing less than 2.75; above plumbeous, the tail black, 



with much white on outer feathers ; beneath red 



and white in males, whitish or buffy, tinged with 



red, in females Gratiatellus.* 



' The single cxooiition is " G(olMi/p{»" polwcejihnln Baird. 



' Notable exceptions to the last character arc /). dominica (LiNN.) and D. palmarum (Gmel.), ono or both 

 of which should in strictness be removed from Dendroica. 



» Tertllmrii Cab., J. f. 0. iii. 18a5, ITo. Typo, Anahalct /ernandina Lemb. (Only two ppccics known, 

 both peculiar to Cuba.) 



« Oranairlhii " Dc Bus. Esq. Cm. (1850?) sub t4ib. 21." Type, fl. rcnM«(H» Du Bns. 



Four very beautiful species of this genus occur in Mexico, as follows : (1)0. i><;iiu«(ii« Dn Brs, in Colimn, 

 Tchuantcpcc, etc. ; (2) (l.francr,cK Baiud. from Trcs Mari.as ; (3) O. «'i"n-|- (Boxap.), from Cordova, etc. j and 

 (4) a. boucardi RiDGW., from Yucatan. A fifth species, (?. pcUcIni ScL., is found in the Amaion Valley. 



