STEIGID^. — ^XLIV. lOT 



wide range. Their habits are so well known that I need 

 not dwell upon them here. Genera about forty; species 

 one hundred and fifty. 



♦Tarsus naked or scant -feathered, facial disk perfect; no ear- 

 tufts; middle claw pectinate; iris black. . Strix, 1. 

 ** Tarsus fully feathered, 

 t Head with evident " eaj'-tufts ;" iris yellow. 

 t Tail about f of wing; bill blackish; length more than 18. 



Bubo, 6. 

 J:]: Tail about half length of wing; length less than 18. 

 ffl. Bill pale; length less than 13. . . . Scops, 5. 

 aa. Bill dark; length more than 13. . . . Asio, 3. 

 tt Head without evident " ear-tufts." 



b. Tail about i length of wing; iris yellow; length less than 



13 Ntctaxe, 4. 



66. Tail about f of wing; length 18 or more. 

 6. Pure white, with dark markings ; toes concealed by long 

 feathers; facial disk incomplete ; bill black; iris yellow. 



Nyctba, 7. 

 ee. Grayish, much barred ; facial disk complete ; bill yellow ; 



iris black or yellow Syenium, 3. 



656. Tail about 4 of wing; bill yellow; iris yellow; length 



about 16 Sdbnia, 8. 



*** Tarsus long, sparsely bristly; facial disk imperfect; middle 

 claw simple Spbotyto, 9. 



/. STRIX, Linnffius. Baen Owls. 



1. S. flammea, (L.) var. pratincola, (Bon.) Ridg. Baen 

 Owi.. Face elongated; reddish or tawny, much vari- 

 egated; L. 17; W. 13; T. 5^ U. S., rather southerly. 



2. ASIO, Brisson. Baebd Owls. 

 {Opus, Cuvier.) 

 1. A. otus, (L.) Less. Long - Eased Owl. Ear 

 tufts well developed, of 8 to 13 feathers; outer primary 



