Plate LXXXYII. 



ASTURINA NATTEBEM 



(NATTEEEE'S BTJZZAED-HAWK). 



m 



]?alco magnirostris 



■>•> ■>■> 



Astur magnirostris 

 Nisus magnirostris 

 JFalco magnirostris 

 Asturina nattereri 



Max. Beitr. iii. p. 102. 

 Temm. PI. Col. 86. 

 Pelz. Orn. Bras. p. 6. 

 Burm. Sjst. Feb. ii. p. 76. 

 Spix, Av. Bras. i. p. 18 (partim). 

 Scl. et Salv. P.Z.S. 1869, p. 182, 



Supra fusca, pileo cineraceo perfuso : remigibus priinariis ferrugineis nigro transfasciatis, intus in pogonio 

 interiore lactescenti-albis, ad apicem fuscis : cauda fusca, subtus dilutiore, fere albescente, nigro tri-vittata et in rectrice 

 extima ad basin variegata : subtus saturate rufa ; gutture cinereo, albo variegato : ventre toto et tibiis albicescente 

 cinnamomeo frequenter transfasciatis: crisso albo: tectricibus subalaribus cinnamomeis, rufo fasciolatis : rostro 

 nigricante, cera flava, pedibus Mvidis : long, tota 13'0, also 8*0, caudse 5'75, tarsi 23. Junior. Supra plumis rufescente 

 marginatis ; subtus albidus, pectore nigro flammulato : ventre rufescente transfasciato. 



Sab, in Brasilia nieridionali. 



As we have lately shewn in our paper on the genus Asturina published in the first part of 

 the Zoological Society's " Proceedings" for the present year, there has hitherto prevailed much 

 confusion amongst the different species of Hawks which constitute this genus. We hope 

 that the figures given in this and the next following plates will serve to assist Naturalists to 

 accomplish the difficult task we have commenced of endeavouring to restore order to the group. 



The Falco magnirostris of Gmelin rests upon the bird figured in Buffon's Planche 

 Enluminee, no. 116, under the name i Epervier a gros lee de Cayenne.' The name magnirostris 

 must therefore be retained for the Gruianan representative of this section of the genus, from 

 which the present species may be easily distinguished by the rich rufous colouring of the under- 

 surface, particularly of the flanks and thighs. Asturina magnirostris is of nearly a pure 

 cinereous below, slight indications of rufescent tinge being only seen upon the darker bands of 

 the belly and the thighs. In A. nattereri 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 ferruginous ; 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. The upper plumage in A. magnirostris is also clear cinereous, instead of brown. 







[173 1 



