156 NORTH AMERICAN BIRDS. 



ceous-nifous, palest posteriorh-, th<> wliolc lefrion immaculato. Wing-formula, 3, 2- 4- 1, 

 5. ^^"mg, 9.90; tail, 6.70; tarsus, 1.U2 ; middle toe, 1.45. 



Adult 9 (42,07C, ilirador; Sartorius). Similar to the male in almo.st every respect. 

 Plumbeous above rather darker and more unilbrm, although the dill'erence is scarcely 

 perceptible. Secondaries more broadly tipped with white, and upper tail-coverts more 

 conspicuously barred with the same. White bars of the black areas beneath scarcely 

 observable. Tail with eight white bars, as in the male longest primary with fourteen 

 white bars on inner web of longest. Wing-formula, 3, 2 - 4 - 5 = 1. Whig, 11.30; tail. 

 7.80; tarsus, 1.70; middle toe, 1.5.5. 



Juv. a (intermediate stage). ^ (37,334, Mazatlan, W. Mexico ; Col. A. J. Gi-a3-son). 

 Plumbeous above darker and more brownish, uniform fi-om rump to head, the former 

 strongly tinged with rusty, this bordering the feathers. Tail darker and more brownish; 

 white bars ten in number, instead of eight, narrower, and tinged with brownish; longest 

 primary with thirteen bars of white on inner web. Lining of the wing black, leaving 

 only a broad ochraceous stripe along the edge ; feathers of the black portion with small 

 circular white spots along their edges. Breast strongly tinged with ochraceous, and with 

 large longitudinal blotches of black of cuneate form, and so crowded as to give almost 

 the predominating color; the black patches lack entirely the white bars. Wing-formula, 

 3=2-4-1-5. Wing, 10.00 ; tail, 7.20. 



9 (55,019, Mazatlan, Grayson). Similar to the last, but lacking the rusty tinge on 

 the rump ; tail with eight white bars, as in the adult ; pectoral stripes narrower and less 

 numerous than in the preceding, and white bars distinguishable on the black areas. Wing- 

 formula, 3, 2 -4 - 1 - .5. Wing, 11.30 ; tail, 8.20. 



6 (first 2>himage). ^ (45,693 and 49,508. Buenos Ayres, Conchitas ; William H. 

 Hudson). Similar to immature male (37,334). Above dull umber-drab, darker on 

 the head ; feathers of back, scapular, rump, and wings foding on edges ; rump much 

 tinged with rusty, this bordering the feathers. Tail with nine very obsolete, narrow, 

 dull white bars, these not touching the edge of the feather on either web. Longest 

 primary with ten transverse white bars on inner web. Beneath pale ochraceous, almost 

 as deep anteriorly as posteriorly; dark areas restricted to a large patch on each side, and 

 dull dark brown (very similar to the wings), instead of black, and scarcely varied ; breast 

 and upper part of abdomen (between the blackisli lateral patches) with large longitudinal 

 cune.ite blotches of the same. " Winter visitor." 



Hab. Whole of South America ; northward through Central America and Mexico, 

 across the Rio Grande, into Texas and New Mexico. 



Localities: Guatemala (Scl. Ibis, 1, 219) ; Cathagena (Cassin, Pr. An. N. S. 1800, 132) ; 

 La Plata (Bur.m. Reise, 437) ; Mexiana (Set. & Salv. 1867, 590) ; Brazil (Pelz. O. Bras. 

 I, 4J ; Buenos Ayres (Scl. & Salv. 1868, 143) ; Chile (Puilippi) ; W. Peru (Sol. & 

 Salv. 1858, 570; 1869, 155); A'enezuela (Scl. & S.vlv. 1809, 252). 



A .specimen from Paraguay (58,738, <? ? Capt. T. J. Page, U. S. N.) has 

 the skty above lighter than in the Mirador male, approaching to ash. The 

 white bars on the l)lack side-patches are very numerous and regular ; the 

 ^vhite of the forehead is more sharply defined, and the deep rufescent-ochre 

 of the posterior portion of the postocular stripe is even deeper than that of 

 the tibia?, etc. ; the breast has a few narrow blackish streaks. The bars on 

 wings and tail, however, are as in Mexican e.xamples. This specimen prob- 

 ably denotes greater age than any other in the series. 



Another specimen (29,809, ? , Mirador), perhaps very young, is rather 

 different from the others in the coloration of the lowur parts ; the rufous of 



