GEOTHIYPIS. 



225 



The ashy of the crown, in the present species, is more restricted, as 

 instead of passing down the occiput, and extending straight across 

 between the black cheeks, its outline is rounded behind, less ex- 

 tended, and allowing the olive green of the nape to pass forward to 

 the dusky eyelids. The under parts are of a more ochry yellow. 

 The bill above is paler. The bill is considerably stouter at the base, 

 and more curved ; the legs, too, decidedly stouter ; the middle and 

 hind toe longer. The tail appears to be a little shorter, or at least 

 not longer than the wings, instead of decidedly longer. 



(2,905.) Supposed to be type of Trichas delq/ieldU, and also type of TrichoB veLata, Baird, 

 Birds N. Am. 



Geothlypis poliocepbala. 



Oeothlypis poUocephala, Baird, n. s. 



? Geothlypis cequinoctialis, Sclates & Salvin, Ibis 1860, 273 CGuatemala). 

 Not of Gm. 



Hah. West coast of Mexico, and Central America 1 



(No. 34,017.) Bill very stout, with the culmen considerably curved from 

 the base, and not unlike Icteria ; the depth of bill more than half distance 

 from nostrils to tip. Tail considerably longer than the wings, a good deal 

 graduated. Wings short, much rounded ; the 1st quill about equal to 9th. 



Above olive green. A narrow frontlet of black, extending over loral region 

 to the eye, and curving round, passes a short distance below it. Eyelids 

 white. Top of head and nape, and sides behind the eyes, including most of 

 ear coverts, ashy. Beneath, including bend of wings, dull yellow ; the sides 

 paler, and tinged with brown. Inside of wings yellowish-white. Outer pri- 

 mary, as usual in the genus, edged with white, the others with olive. Bill 

 light brownish above, whitish beneath. 



This specimen is marked male, but is in poor condition. One received from 

 Mr. Salvin, from Guatemala, differs a little in having the black continued 

 entirely round the eye, but inferiorly not extending behind its posterior ex- 

 tremity. There are no white feathers on the eyelids. The sides of head and 

 ears are ashy, as in the first specimen. The bill is even stouter, and the 

 culmen more curved, than in 34,017, and exhibits a very striking difierence 

 from that of G. velata. 



Length (34,017), 5.40 ; wing, 2.20 ; tail, 2.65 :, its graduation, .50 ; difference 

 between 1st and 4th quills, .18 ; bill above, .50, from nostril, .30, from gape, 

 .61 ; depth, .165 ; tarsus, .87 ; middle toe and claw, .68 ; hind toe and claw, .51. 



No. 30,677. Length, 5.35; wing, 2.35; tail, 2.60 (worn); bill above, .56, 

 15 April, 1865. 



