. On the natural history and classification of birds . rom this one species, which seems to have an equal,and perhaps a greater, claim to a station in the genus Pandion. Family STRIGIDJE. Owls.Head very large. Eyes surrounded with a circle of ra-diated feathers, forming a facial disk; plumage soft, lax.Ears large. Feet generally feathered to the toes; outertoe directed outwards. Bill more or less short, thicklyprotected by basal bristles: upper mandible entire, lowernotched. Feed and fly during night.Strix, Linn. Typical Owls. Head and facial disk verylarge: the former generallywithout egrets;
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. On the natural history and classification of birds . rom this one species, which seems to have an equal, and perhaps a greater, claim to a station in the genus Pandion. Family STRIGIDJE. Owls.Head very large. Eyes surrounded with a circle of ra-diated feathers, forming a facial disk; plumage soft, lax.Ears large. Feet generally feathered to the toes; outertoe directed outwards. Bill more or less short, thicklyprotected by basal bristles: upper mandible entire, lowernotched. Feed and fly during night.Strix, Linn. Typical Owls. Head and facial disk verylarge: the former generallywithout egrets; the latter com-plete, and margined by a borderof narrow stiff feathers. Earsvery large; the conch pro-tected by an operculum or lid.Feet moderately long, scantilyfeathered.Strix. Head enormous, wider than the body, withoutegrets. Bill somewhat lengthened, and straight at thebase. Tarsi rather long. The middle claw serrated.Ears and operculum very large.S. flammea. Selby, PI. 124. badia. Horsf. Java.Scotiaptex, Sw. Head smaller, without egrets. Oper-. STRJGID^. 217 culum of the ears large, and covering the orifice. Tarsus short, and thickly feathered. Tail graduated, considerably lengthened. H. cinerea. N. Z. pi. 31. Uralensis. PI. Col. 27. Scotophilus, S w. Operculum of the ears very small. Head without egrets. Tarsus short, feathered to the claws. Wings and tail rounded. S. Tengmalmi. N. Z. pi. 32. Acadica. Wils. iv. pi. 34. 2.Otus, Ant. Head smaller than the circumference of the body, and having short egrets. Wings long; the second quill longest. Ears large, operculated. Feet moderate. O. Europaeus. Selby, pl.120. brachyotos. Wils.iv.pl. 33.3.Asio, Antiq. Horned Owls. Head large, furnished with a double crest or ^mm**=?**.- 198 egrets. Ears and facial disk moderate, and the latter not always per-fect. Ears without an operculum. Bill short, with the upper mandible sometimes festooned. 198.) A. bubo. Pi. Enl. 435. Virginiana. Wils. vi. pi. 50. 1.Heliaptex, Sw. Habits diurnal.