534: AV£S. 



Sub-Genus G. — CARACARiE.— Cheeks and throat naked. 



Falco fortnosus.— The Red- Throated Falcon. I'late xxvi*. fig. 4. Upper 

 parts dark liver-coloured brown j abdomen Indian red j throat purple ; cere, 

 orbits, and feet, dull yellow. Eighteen inches long. Inhabits South America. 



Sub-Genus 7. — Cyminpi. — Tarsi short, toes semi-webbed. 



Falco uncinatus. — The Hooked Eagle. Plate xlvii*. fig.3. Lead-coloured 

 above, paler below ; quills with fillets of dark brown ; base of tail white j 

 beak considerably hooked. Fifteen inches long. Inhabits Brazil. 



Genus 10. — STRIX LinncBus. 



Generic Character. — Beak compressed, bent from its origin ; base sur. 

 rounded by a cere, covered wholly, or in part, by stifl, erect hairs ; head 

 large, much feathered ; nostrils lateral, rounded, open, pierced in the ante- 

 rior margin of the cere, concealed by hairs directed forwards, eyes very large ; 

 orbits surrounded by feathers ; legs feathered, frequently to the talons ; feet 

 with three toes before and one behind, separate ; the anterior reversible ; 

 first quills dentated on their anterior border, the third longest. 



Sub-Genus 1. — Noctua. — Sa(;ig-?jt/.— Without tufts on the head ; ears 

 smRll; disc of feathers surrounding the eyes, small. 



Strix nyctea.—T\\e Snowy Owl. Plate xxvii. fig. 3. Described, vol. iiL 

 p. 96. 



Sub-Genus 2. — Strix.— Srtjiig-w?/.— Ears large, wide and open, furnished 

 Ji front with a broad membranous operculum ; discs anmnd the eyes large ; 

 beak nearly straight from its base, and arched towards the point; legs cover- 

 ed with slender feathers. 



Strix Jatntnea.— The Barn Owl. Plate xxviii. fig. 3. Described, vol. iii. 

 p. ye. 



Strix stridula.— The Tawny Owl. Plate xxviii. fig. 4. Described, vol. 

 iii. p. 97. 



Sub-Genus 3 Bubo. — Gerin. — Beak strongly inclined from the base ; nog. 



trils large, oblique, and concealed ; ears of moderate size ; head surmounted 

 by tufts of feathers, somewhat resembling horns. 



iVn.i-oiMi.— The Long- Eared Owl. Plate xxviii. fig. 2. Described, vol. 

 iii. p. 95. 



ORDER II.— OMNIVOROUS BIRDS. 



Beak robust, medium-sized, and sharp on the edges ; upper mandible 

 Miore or less convex, and notched at the point; feet with four toes, three 

 liefi.re and one behind ; wings of medium length ; quill feathers terminat- 

 ing in a point. 



Genus 1.— OPISTHOCOMUS.— //%er. 



Generic Character.— BiU short, thick, convex, bent do«Tiwards at point; 

 base dilated laterally ; under mandible strong; angular at its termination; 

 nostrils near the middle of the bill, covered by a merabraue ; legs strong ; 

 tarsus shorter than the middle toe ; toes edged by a rudimentary membrane • 

 fiist quill short, the next four grad'jated, and the sixth longest. 



