Plate LXXXVIL 



A8TUPJNA NATTEPiERI. 



(NATTEREPt'S BUZZAED-IAWK). 



Falco magnirostris 



it )) 



Astur magnirostris 

 Nisus magnirostris 

 Falco magnirostris 

 Asturina rmttereri 



Max. Beitr. iii. p. 102. 

 Temm. PL Col. 86. 

 Pelz. Om. Bras. p. 6. 

 Burm. Syst. Ueb. ii. p. 76. 

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

 Scl. Salv. P.Z.S. 1869, p. 132. 



Supra fusca, pileo cineraceo perfuso : remigibus primariis fen-ugineis uigro transfasciatis, intus in pogonio 

 interiore lactescenti-albis, ad apicem fuscis : caiida fusca, subtus dilutiore, fere bescente, cigro tri-vittata et in rectrice 

 extima ad basin variegata : subtus saturate rufa; gutture ein t-o, a n variegato : ventre toto et tibiis albicescente 

 'feinnamomeo frequenter transfasciatis : crisso albo : tectrici ms su'i laribus cinnamomeis, rufo fasciolatis : rostro 

 "^igricante, cera flava, pedibus flavidia : loug. tota 130, aloe S'O, eaudse 5'75, tarsi 2'3. Junior. Supra plumis rufeacente 

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



Hob. in Brasilia meridiouali. 



As we liave lately shewn in our paper on tlie genus Asturina publislied in the first part of 

 the Zoologibal 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 folloA^ing 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 ^ Epervier ii gros bee de Cayenne.' The name magnirostris 

 must therefore be retained for the-Guianan 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 m.agnirostris is of nearly a pure 

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

 the bellv 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 Ciiss-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 broAvn. 



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