TO REVIEW OF AMERICAN BIRDS. [PAUT I. 



(No. 57, Mr. Lawrence's collection, from Bahia.) Above lead gray, darker 

 towards the ruiiip ; top of head and sides to lower edge of the eye glossy 

 black. Beneath clear white, with a tinge of plumbeous across breast and 

 sides. Quills black, edged like the back, the alula and inner secondaries 

 broadly with white. Tail feathers glossy black, except the three exterior, 

 of which the outermost is black on the basal half of the inner web (rather 

 less on the outer) ; the next has the black extended nearly half as much more 

 (on the basal two-thirds) ; the next is black, with the terminal fourth white. 

 The shafts throughout are black. 



The length of the outer primary cannot be given, as the wings are not quite 

 perfect. 



Total length, 4.50 ; wing, 2.00 ; tail, 2.35 ; bill from forehead, .57, from 

 nostril, .35 ; along gape, .64 ; tarsus, .71 ; middle toe and claw, .45. 



Polioptila bufToiii. 



PoUoptila huffoni, Sclatee, P. Z. S. 1861, 127.— Ib. Catal. 1861, 12, no. 73. 



This black-headed species I have not seen. It is said by Dr. 

 Sclater to differ in a considerably smaller size (length, 4.00 ; wing, 

 1.90; tail, 1.80; bill from gape, .60), a longer bill, and in having 

 the outer tail feather entirely white, the second and third white 

 almost to the base. In leucogastra the black is much more extended, 

 as will be seen above. 



Polioptila albiloris. 



Polioptila albiloris, Salvin, P. Z. S. 1860, 298 (Guatemala). 



" This species has the pileus black, the lores white ; the outer three tail 

 feathers tipped with white, decreasing gradually in amount (none entirely 

 white). There does not appear to be a superciliary stripe. Length, 4.30 ; 

 wing, 1.90; tail, 2.00."— Salvin. 



Bab. West Coast Central America. 



In the collection before me are several skins from Central America 

 which possess, to a certain extent, the characters of the specimen 

 given above — the one coming nearest to it (32,556) having the back 

 of a light gray color, the whole top and side of the head down to 

 the lower edge of the eye black. There is a short white line from 

 nostril towards, but not reaching the eye ; the lores themselves are, 

 however, black. The outer tail feather is white, except on the con- 

 cealed base of the inner web, which is black ; the next has this black 

 reaching beyond the middle of the feather ; the third has an oblique 

 white tip. The bill is long ; the 1st primary is little more than half 

 the 2d. Length, about 4.00; wing, 1.85; tail, 2.00; tarsus, .67; 

 bill from nostril, .35. 



A second specimen (30,555) is very similar, but shows only the 



