532 NOIiTH AMERICAN BIRDS. 



bK Sui)erciliary stripe bright yellow ; toj) of Lieiul with a black stripe on each 



side, ami IbroheaJ black mediully. 



Side of head rich chestnut, becoming blackish on loivs ; lower parts 



j-ellow, changing to olive-green laterally ; length about 5.00, wing 



2.30-2.60, tail 2.40-2.60. Jlub. Guatemala and eastern Mexico; 



southern Texas? 693. B. belli (Giraud). Bell's Warbler. 



ii'. Superciliary stripe white ; top of head without any black. 



c\ Lower parts entirely j-ellow. 



Ear-coverts rufous, like top of head ; length about 4.50-5.00, wing 



2.10-2.20, tail 2.25-2.60. Mab. Central America, from Panama 



to Guatemala. 



B. delattrii Bonap. Delattre's Warbler.' 



c'. Lower parts yellow onlj- as far back as breast, the belly white and 

 flanks and under tail-coverts pale brownish buff. 



Otherwise like B. delatrii, but cheeks more extensivelj' white ; 

 length about 4.50-4.75, wing 2.00-2.10, tail 2.20-2.35. Hab. 

 Southern Mexico, north to Mirador, Orizaba, ami Mazatlan. 



B. rufifrons (Swain.s.). Rufous-crowned Warbler.' 



Family MOTACILLIDiE.— The Wagtails and Pipits. (Page 322.) 



Genera. 



a\ Tail equal to or longer than wing ; plumage plain, both above and below. 



b\ Tail longer than wing, double-rounded or cmarginate ; hind claw shortef 

 than the toe, strongly curved ; back ash-gray or black. 



Motacilla. (Page 532.) 



6'. Tail not longer than wing, rounded ; hind claw longer than the toe, slightly 



curved; back olive, olive-green, or brownish.... Budytes. (Page 5.34.) 



a'. Tail decidedly shorter than wing; jiiumage usually much streaked below 



(sometimes above also) Anthus. (Pago 535.) 



Genus MOTACILLA Li.nnjecs. (Page 532, pi. CXIX., fig. 1.) 



Species. 



a'. Lower parts pure white; adults with black on chest (throat also, in summer); 

 upper tail-coverts blackish or dark grayish ; third tail-feather black. Nest 

 on ground, usuallj^ near water, composed of dried grasses, etc., lined with 

 softer materials. Eggs 3-5, whitish, thickly speckled with brown. (Adults 

 in summer — sexes essentially alike*: Entire throat and chest uniform deep 



• nanilentrruii dclntrii BoxAP,, Comp. Rend, xxxviii. 1854, 383. 



' Sclophnija rufi/rona Swains., An. in Moniu;. 1837, 2'J4, Bntihulcnui rufifront Ronap., Con.^p. i. l.S.II). 3H. 

 ' Except ID M. {u'jcnn, in wliich the female has the back gray or much mi.\cil with gray, insteal of unifurui 

 black. 



