70 REVIEW OF AMERICAN BIRDS. [PART I. 
(No. 57, Mr. Lawrence’s collection, from Bahia.) Above lead gray, darker 
towards the rump; 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 buffoni. 
Polioptila buffoni, ScuateEr, P. Z. 8. 1861, 127.—Is. 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, Savin, P. Z. 8. 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. 
Hab. 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 (80,555) is very similar, but shows only the 
