1G9 
versely banded with ochraceous. (I.) Tail black, tipped with whitish, 
and crossed by eight to ten narrow bands of clouded ashy and ochraceous, 
the former prevailing on the outer, and the latter on the inner webs 
(II.) Prevailing color of the tail white, with a grayish-brown, mostly 
longitudinal, mottling, crossed near the end by a broad zone of 
black about 2.00-2.50 wide, the tip again white. The whitish portion 
crossed by five or six irregular, narrow, zigzag bands of black, these 
otten so irregular as to hardly appear as bands when the tail is closed. 
Hah .—South and Middle America, from Buenos Ayres and Paraguay 
to Mazatlan and Vera Cruz. 
The South American and Middle American specimens of this species 
are so easily distinguished that they seem to be separable as well-marked 
geographical races, characterized as follows:— 
a. 
3. 
Tail white, with a basal narrow band and wide subterminal zone of 
black. Tibiae and lining of wing without white bars. Wing, 1G.50- 
18.00; tail, 11.75-12.00; culmen, 1.30; tarsus, 4.90-5.00; middle 
toe, 1.90-2.10. Sab .—Eastern South America, south to Buenos 
^ Ayres and Paraguay... . zonura. 
lail black, with a medial zone and terminal and basal narrow bands 
of white. Tibiae and lining of the wing with conspicuous white 
bars. Wing, 15.15-1G.50 ; tail, 10.50-11.50; culmen, 1.10-1.35; 
tarsus, 4.30-4.85; middle toe, 1.G0-1.90 Sab .—Middle America, 
north to Vera Cruz, Tehuantepec, and Mazatlan./?.-? 
In the northern form, the black appears to be constantly of a more 
plumbeous cast, the neck, back, and jugulum decidedly glaucous; the 
bill is also not so deep, its length being about the same; the plumbeous 
bands on the remiges are also more distinct. The subterminal black 
zone of the tail is from 3'to 4 inches in width, the white one just ante¬ 
rior to it 1.50 to 1.80; the next black one about the same width ; and 
the basal or sub-basal white one a little wider than the terminal band 
of about halt an inch in width. In the southern form, the terminal 
white and subterminal black are about the same widths as in the north¬ 
ern style, but the white zone across the middle is 4.00 to 4.50, instead 
of only 1.50 to 1.80 in breadth, while the black just preceding it is nar¬ 
row and either basal or merely mottled with whitish at the roots. 
There are no young specimens of the southern race in the National 
collection. 
List of specimens in United States National Museum. 
Catalogue 
No. 
Originai 
No. 
Sex and 
age. 
Locality. 
Date. 
Donor. 
20031 
41 
Vermejo River, Arg. Rep. 
Capt, T. J. Page, U. S. N. 
29304 
d - 
Colima, Western Mexico. 
Mi rad or, Eastern Mexico. 
Rio Tnpila, Western Mexico.... 
Guatemala. 
Feb. —,1864 
J. Xantus. 
30239 
30900 
32969 
d juv. 
Nov. —, 1864 
Apr. —,- 
Dr. C. SartOrius. 
J. Xantus. 
33204 
34062 
24 
d - 
Costa Rica (San Jos6) . 
Realejo, Central America. 
•fan. 28,1864 
Fel). —,- 
V Cl 1 CitllA. 
J. Carmiol. 
Capt. J. M. Dow. 
37870 
42137 
153 
d — 
Yucatan (Merida) . 
Tehuantepec (Protrero). 
Feb. 8,1865 
Feb. —, 1866 
Dr. A. Schott. 
Prof. F. Sumiehrast. 
50767 
52764 
759 
Mazatlan Western Mexico _ 
. 
Col. A. J. Grayson. 
Do. 
Capt. Page. 
Prof W. M. Gabb. 
59002 
10 
— ad. 
Paraguay . 
66328 
20 
— juv. 
Costa Rica (Lipurio). 
- —, 1873 
67282 
11° 
Tehuantepec. 
Sept. —, 1872 
Prof. F. Sumiehrast. 
57859 
552 
— juv. 
.do. 
Feb. 2, 1869 
Do. 
59510 
923 
d ad. 
.do. 
Oct. —.1869 
Do. 
Other specimens examined .—In nms. Philad. Acail., 9 ; Boston Soc., 4 ; \m Mns 
N.Y.,1; G. N. Lawrence, 3; total, 3‘2. 
No. 2—G 
