26 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



1. BUTEO ERYTHRONOTUS. 



Huliaetus erytlironotus, Kinff, in Zoological Journal, vol. iii. p. 424'. 

 Butco tricolor, D'OrVigny. 



I obtained specimens of this bird from Chiloe and the Falkland Islands, and 

 Captain King who first described it, procui'ed his specimens from Port Famine, 

 Lat. 53° 38' in TieiTa del Fuego. M. D'Orbigny states that it has a wide range 

 over the provinces of La Plata, central Chile, and even Bolivia ; but in this 

 latter country, it occurs only on the mountains, at an elevation of about 12,000 

 feet above the sea. The same author states, that it usually frequents open and 

 dry countries ; but as we now see that it is found in the dense and humid forests 

 of Chiloe and Tierra del Fuego, this remark is not applicable. At the Falk- 

 land Islands, it preys chiefly on the rabbits, which have run wild and abound 

 over certain parts of the island. This bird was considered by Captain King as a 

 Halia'etus ; but Mr. Gould thinks it is more properly placed with the Buzzards. 

 Captain King gave it the appropriate specific name of erytlironotus, and, there- 

 fore, as Mr. Gould observes, the more recent one of tricolor, given by M. 

 D'Orbigny, must be passed over. 



2. BuTEO VARIUS. Gould. 



Buteo varius, Gould, Proceedings of the Zoological Society, Part v. 1837, p. 10. 



H. vertice corporeque supra intensh fuscis, plumis fulvo marginatis vel gut talis ; 

 primariis secmidariisr/ue cinereis, lineis immerosis fuscis transversim striatis; 

 Cauda cinered, lineis angustis ?iuinerosis fuscis transversim notald ; singulis 

 plumis flavescenli-albo ad apicem notatis ; gidd fuliginosu ; pectore fulvo, lined in- 

 terrupld nigrescente a guld tendente circumdato ; ahdomine imo lateribusque stra- 

 mineo et rufesccnti-fusco variegatis ; femoribus crissoque stramineis lineis transver- 

 salibus anfractis rufescenti-fuscis ornutis ; rostro nigro ; cerd tarsisque olivaceis. 



Long. tot. 21^; ate, 16^; caudw, 10; tarsi, 3|-. 



Colour. — Head and back of neck umber brown, with edges of the feathers 

 fringed with fulvous, (or buff" orange with some reddish orange) and their 

 bases white. Shoulders brown, with the feathers more broadly edged. Back 

 the same, with the basal part of the feathers fulvous, with transverse bars 

 of the dark brown. Tail blueish gray, with numerous, narrow, transverse, 

 faint black bars. Tail-coverts pale fulvous, with irregular bars of dark 

 fulvous and brown. Wings: primaries blackish gray, obscurely barred; 

 secondaries and tertiaries more plainly barred, and tipped with fulvous. 

 Wing coverts, dark umber brown, largely tipped, and marked with large 



