169 



versely banded with ochraceous. (I.) Tail black, tipped with whitish, 

 and crossed by eiijht to ten narrow bauds 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 

 often 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.. Tail white, with a basal narrow band and wide subterminal zone of 

 black. Tibite and lining of wing without white bars. Wing, 16.50- 

 18.00; tail, 11.75-12.00; culmen, 1.30; tarsus, 4.90-5.00; middle 

 toe, 1.90-2.10. Hah. — Eastern South America, south to Buenos 

 Ayres and Paraguay a. zonura. 



i9. Tail black, with a medial zone and terminal and basal narrow bands 

 of white. Tibipe and lining of the wing with conspicuous white 

 bars. Wing, 15.15-16.50; tail, 10.50-11.50; culmen, 1.10-1.35; 

 tarsus, 4.30-1.85 ; middle toe, 1.60-1.90 ^fl&.— 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 half 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 ifational 

 collection. 



List of specimens in United States National Museum. 



Catalogue 

 No. 



Original 

 IJ-o. 



Sex and 



age. 



Locality. 



Date. 



Donor. 



20031 



41 





Vennejo River, Arg. Eep 



Colima, "Western jMexico 



Mirador, Eastern Mexico 



Rio Tupila, Western Mexico 



Fub.' —, i'8'64 

 Nov. — , 1864 

 Apr. — , 



4 



Capt. T. J. Page, U. S. K. 



J. Xantus. 



Dr. C. Sartoriua. 



J Xantus. 



29304 

 3()239 

 3(i000 



cT- 

 o" juv. 



32969 



24 



'"'(^-"" 





33204 

 34062 



Costa Rica (San Jose) 



Realejo, Central America 



Jan. 28,1864 

 Feb. , 

 Feb. 8, 1865 

 Feb. — , 1866 



J. Carniiol. 

 Capt. J. M. Dow. 



37870 



153 



d- 



42137 



Tehuantepec (Protrero) 



Mazatlan Western Mexico 





507ti7 



759 





Col. A. J. Graysiin. 

 Do. 



.V2764 





do 





59002 



10 



20 



lU 



552 



923 



— ad. 



— juv. 







Cnpt. I'agp. 

 Pro! W AI Gabb 



66:128 





—1873 



S.-pt. — , 1872 

 Ft-b. 2, 1860 

 Oct. —1869 



67282 



Tehuantepec 



do 



do 





,57859 

 59510 



— juv. 

 d ad. 



Do. 

 Do 









Other specimois examined. — In imis. 

 N.Y.,1; G. N. Lawreuco, 3; total, '.)' 

 :So. 2—6 



Pliilad. Acad., 9 ; Boston Soc, 4 ; Am. JIus., 



