132 MESSRS. SCLATER AND SALYIN ON THE ASTURIN2. [ Feb. 11, 
Mexiana (Wallace); Eastern Peru (Bartlett et Tschudi); New 
Granada, Bogota (Mus. 8.-G.); Western Ecuador (Fraser). 
The first and, indeed, only author who has appreciated the dis- 
tinction between the present species and its Brazilian representative 
is von Pelzeln, who, in his ‘Ornithologie Brasiliens,’ considers the 
latter the true dAstur magnirostris, and calls the present bird 
Astur macrorhynchus from Natterer’s MS. Of this being the case 
we are enabled to speak with some confidence, as one of Natterer’s 
marked specimens from San Carlos on the Rio Negro, in the col- 
lection of Salvin and Godman, is undoubtedly referable to this species. 
But Gmelin’s Falco magnirostris is based entirely upon Buffon’s 
Epervier a gros bec de Cayenne (Pl. Enul, 464). This figure, leaving 
the locality out of the question, clearly represents the northern spe- 
cies, which must therefore retain the name Asturina magnirostris. 
Comparing a considerable series of specimens of these two allies 
together, we cannot but fully agree to von Pelzeln’s separation of 
them. The present bird may be readily distinguished from the next 
species by the cinereous colour below, slight indications of rufescent 
tinge being only seen upon the darker bands of the belly and thighs. 
In A. natterert the throat is darker cinereous and distinctly striped 
with white longitudinally ; the breast is rich rufous in very adult 
birds, almost without cross markings; the belly is very pale fulvous 
or almost cream-colour, with numerous cross bands of deep ferrugi- 
nous; the thighs are covered by minute cross bands of the same 
colour. In A. magnirostris the thighs are pure white, cross-banded 
with pale cinereous with merely a slight rufescent tinge. 
4. ASTURINA NATTERERI. 
Falco magnirostris, Max. Beitr. iii. p. 102; Temm. Pl. Col. 86 
(avis jr.). 
Astur magnirostris, Pelz. Orn. Bras. p. 6. 
Nisus magnirostris, Burm. Syst. Ueb. ii. p. 76. 
Falco magnirostris, Spix, Av. Bras. i. p. 18 (partim). 
Supra brunnescenti-cinerea ; subtus gula cinerea albo striata: 
pectore ferrugineo: ventre toto cum tibiis ferrugineo-rufis pal- 
lido fulvo transfasciatis : cauda nigricante, cinereo trivittata 
et terminatu, 
Hab. South-eastern Brazil (Max. et Burmeister); Bahia (Wu- 
cherer) ; S. Paolo et Mattogrosso (Natterer). 
As will be seen from von Pelzeln’s list, Natterer collected a large 
number of this species in various parts of Southern and Inner Brazil ; 
but the specimens referred to as obtained by him at Barra do Rio 
Negro are more probably referable to the true 4. magnirostris. An 
excellent series of examples of this Hawk, collected in the vicinity 
of Bahia, has lately been received by Salvin from Dr. Wucherer. 
We have also to thank the authorities of the Norfolk and Norwich 
Museum for the loan of many specimens of this and the preceding 
species from their fine collection of Rapacious birds. 
Having already explained why the name magnirostris, which has 
