222 



EEVIEW OE AMERICAN BIRDS. 



[part I. 



to its northern boundary, I do not present the special localities of 

 any but extra-limital specimens. 



Oeothlypis melanops. 



Geothlypis melanops, Baird, n. s. 

 Eab. Eastern Mexico. 



(No. 26,372, % .) Bill slender, conical ; culmen nearly straight to the 

 gently decurred tip. First quill about equal to the 7th. Tail considerably 

 graduated ; the feathers broad. 



Color much as in G. trichas, with a similar black mask, crossing the fore- 

 head and passing over the cheeks and ears, through the eyes. This black 

 mask is, however, bordered internally and above for nearly its own width by 

 white, very faintly tinged with bluish, the nape only in fact being tinged 

 with olive brown. The rest of the upper parts are olive green. All the under 

 parts are pure rich uniform yellow, even including the middle of belly, the 

 edge and the inside of wings ; the sides of body are somewhat tinged with 

 brownish. Bill black ; legs yellowish. 



Total length, 5.00; wing, 2.44; tail, 2.60; graduation, .41; width of outer 

 feather, .33 ; difference of 1st and 4th quills, .24; length of bill from forehead, 

 .55, from nostril, .34; along gape, .65 ; tarsus, .84; middle toe and claw, .75 ; 

 claw alone, .25 ; hind toe and claw, .56 ; claw alone, .27. 



In a series of over one hundred specimens of black-faced Geo- 

 thlypis, agreeing in genej-al characters with G. trichas, there is one 

 specimen from Mexico so difTerent from all the rest as apparently to 

 be entitled to specific separation. It is of considerably larger size 

 than the average of G. trichas; the tail is longer; its feathers 

 broader. The feet are larger ; the middle toe and claw much longer. 

 The entire under parts are of a nearly uniform yellow, without the 

 whitish of the abdomen so characteristic of typical G. trichas. The 

 space above, and inclosed by the black facial mask, is quite pure 

 bluish-white, of much greater extent than in other specimens. 



This species is probably resident in Mexico, as the specimen de- 



