{ 28 ) 
'Accipitres. (JVoctunico,) 
SUB-GENUS I. STRIX. 
TRIBES. 
1. Otus, Cup^. 
Egrets raised at will. Conch of the ear Tarsi feathered to 
extended in a semi- the nails, 
circle from the heak 
towards the top of the 
head, and furnished 
with a membranous 
operculum. 
2. Ulula. 
No Egrets. Ear and heak of Tarsi feathered to 
Otus. the nails. 
3. Strix, Savigny. 
No Egrets. Beak elongated, Tarsi feathered, but 
curves only towards only hairs on the toes, 
the end; ear of Otus. 
4. Syrnium, Savigny. 
No egrets. 
Conch reduced to an Tarsi feathered to 
oval cavity, not oc- the nails, 
cupying half the height * 
of the skull. 
Tail short. 
5. Bfbo. 
Egrets. 
Conch of the Syr- 
jiium, but the circle of 
feathers around the eye 
less marked. 
§ Egrets wider, further 
])ack and difficultly raised 
from a horizontal line. (6) 
1. Strix Ascalaphus. 2. S. Litturata, 3. S. Flammea. 4. S. Aluco, 
5. ^. Bubo. Fig. 43. (6) Chouette a aigrettes^ Vaill. Fig. 42. 
