CONTENTS. 



PAGE 



Spixaetus, . , * . .220 



The Crested Spizaetus. 



Spizaetus crystateilus. Plate XXI. . 222 



Circus, ... 224 

 The Common Harrier. 



C" 'ircus cyaneus. Plate XXII. . . 227 

 The Ash- Coloured Harrier. 



Circus cineraceus. Plate XXIII. . . i34 

 The Marsh Harrier. 



Circus rufus. Plate XXIV. . , 23* 



Stneida? Owls, .... "242 



Rggs of Harriers and Owls. Plate XXV. . 244 



Head of Barn Owl, natural size. Plate XXVI. 248 



Strix, ...... 251 



White or Barn Owl. 



Strix Jlammea. Plate XXVII . . 253 



Ulula, . 260 

 The Tawny Owl. 



Ulula stridula. Plate XX\ .II. . . 263 



Noctua, ..... 268 

 Tengmalm's Night Owl. 



Noctua Tenymalmi. Plate XXIX. . 2/0 



Scotophilus, . . .' . 272 

 The Naked- Footed Night Owl. 



Scotophilus nudipes. Plate XXX. . . 274 



Otus, ..... 278 

 The Long- Eared Owl. 



Otus vulyaris. Plate XXXI. . . 280 



The Short- Eared Owl, .... 284 



Bubo, .... 291 

 The Great-Eared Owl, or Ragle Owl. 



Bubo Maximus. Plate XXXII. . 293 



Scops, 298 



