21 



Ra PACES — DlURNTE. 



FALCONIDjE. 



Genus Falco. ( Linnccus.J 



Generic Characters. — Head and neck covered with feathers; 

 beak hooked and generally curved from its base; cere coloured, 

 more or less hairy at its base; nostrils lateral, rounded, or 

 ovoid. Tai'si covered with feathers, or with glossy scales. Toes 

 four; external toe often united at its base by a membrane to 

 the middle toe; claws pointed, very much hooked, mobile and 

 retractile. Vertebrse twelve. 



Sub-genus Falco. (Bechstein.) 



Sub-generic Characters. — Beak short, and bent from its base; 

 upper mandible with one, rarely two teeth; legs robust; toes 

 strong, long, and armed with curved and sharp claws; tarsi 

 short; wings long, first and third quill feathers of equal length, 

 second quill feather the longest. 



NORWEGIAN JER-FALCON. 



Falco gyr-falco norvegicus. 



Falco gyr-falco, Sciilegel; Kevue, 1844. 



" lanarius, Linnaeus; Faun. Succ, p. 



22, No, 62. 



