Ridgway.] OO [May 21, 



Ch. Wing, 8.50-9.50; tail, 6.50-7.00; tarsus, 2.25-2.40; middle 

 toe, 1.20-1.30. Adult. Tail pure light cinereous, concolor with the 

 back, crossed with three broad zones of black (sometimes a fourth in- 

 dicated) about equal in width to the ash. Head, jugulum and whole 

 upper parts, plain pale ash; no white on the lores; rufous on the 

 outer webs of the quills not barred with dusky, or else only indis- 

 tinctly so. Lower parts pure white, more broadly barred with red- 

 dish ashy. 



Hdb. Northern South America, from the Atlantic to the Pacific. 

 Cayenne, (Buffon); Brit. Guiana (Schomb.); Rio Negro, Eio Bran- 

 cho and Rio Madeira (Natterer) ; Venezuela (Gcering) ; Mexiana 

 (Wallace) ; E. Peru (Bartlett and Tschudi) ; Bogota (Mus. S. and G.) ; 

 W. Ecuador (Fraser). 



Specimens examined. Nat. Mus., 3 ; Philad. Acad., 5 ; Boston 

 Soc, 3 ; Cab. G. N. Lawrence, 2 (Bogota.) Total, 13. 



b. var. nattereri Sclater and Salvin. 



Falco magnirostris Max., Beitr., in, 102. — Temm., PI. Col. 86 (juv.). 



— Spix., Av. Bras. I, 18 (in part). 

 Astur magnirostris Pelz., Orn. Bras., p. 6 ; iv, 463. 

 Nisus magnirostris Burm., Syst. Ueb. n, 76. 

 Asturina nattereri Scl. and Salv., P. Z. S. 1869, 132 and 598; Ex. 



Orn. xi, 1869; pi. lxxxvii. 

 Astur nattereri Reinh., Ved. Med. 1870, 69. 



Ch. Wing, 8.50-9.50; tail, 6.50-7.00; tarsus, 2.20-2.50; middle 

 toe, 1.15-1.20; culmen, .75. Tail deep, somewhat brownish, ash, 

 lighter than the back, crossed by three distinct, and one or two ob- 

 scure, bands of black. Upper parts plain brownish slate. Rufous of 

 the quills narrowly, but distinctly, barred with black. Lower parts 

 about equally barred with dull, rather light, rufous and yellowish white. 

 Adult. Breast nearly plain, or unvariegated ; varying from dull light 

 rufous to grayish brown. Young. Breast longitudinally striped with 

 brown or rufous, on a whitish ground. 



Hab. Brazil and Peru?; S. E. Brazil (Max. et Burm.) ; Bahia 

 (Wucherer) ; San Paulo and Matogrosso (Natterer) ; Rio de Janeiro 

 and Rio das Velhas (Mus. Comp. Zool.), Peru (Scl. and Salvin). 



Specimens examined. Nat. Mus., 6; Philad. Acad., 1; Boston 

 Society, 3 ; Mus. Cambridge, 4 ; N. Y. Mus., 2 ; Cab. G. N. Law- 

 rence, 1. Total, 17. 



c. var. griseocauda Ridgway. 



Asturina rujicauda Scl. and Salv., P. Z. S. 1869, 133 (in part). 

 Asturina magnirostris Auct. (All citations from Mexico.) 



