GEOTHLYPIS. 



219 



GEOTHLYPIS, Cab. 



Trickas, SwAiss. Zool. Jour. 1827, 167 (not of Glogek). 

 Geothlypis, Cab. Wiegm. Archiv, 1847, i, 316, 349. (Type Tardus tri- 

 chas, LixN.)— Baikd, Birds N. Am. 1858, 240. 



Species of Geothhjpis are found throughout America, some of 

 them having a wide distribution. Most, however, belong to the 

 northern and middle sections of the continent. They may be 

 arranged as follows :-^ 



Forehead crossed by a broad black mask, which passes over the 

 eyes, cheeks, and ears. Crown and occiput without a pure 

 ashy patch. 



The black mask bordered above and behind by whitish of 

 more or less extent ; nape tinged with brown. 



Beneath yellow ; belly and aual region whitish in 



distinct contrast ; lining of wings white. Mask 



narrowly bordered by bluish-gray . . trichas. 



Beneath throughout uniform rich yellow ; lining 



of wings yellow. Mask broadly bordered by 



bluish-white melanops. 



The black mask without whitish border, and extending 

 farther back on the head. 



Beneath, including inside of wings, yellow . . speciosa. 

 Paler green above ; brighter yellow beneath than 



the last semijlava. 



Forehead crossed by a narrow black mask, which extends to 

 the eyes, sometimes through them over the ears ; not bo/- 

 dered behind by whitish. Top of head ashy, in decided 

 contrast. Beneath yellow. 



The black extending through the eye over the ears. Eye- 

 lids black. 



Bill slender ; the height less than half the distance 



from nostrils to tip ; culmen nearly straight. 



Ashy of crown extending over side of head 



to the black of the ears .... velata. 



Bill stouter ; height about equal to half the dis- 



