175 
HORNED OWLS, ETC. 
FAMILY BUBONIDiE: HORNED OWLS, ETC. 
KEY TO GENERA. 
1. Small, wing 3.40-7.50. 
2. With ear tufts (inconspicuous in young) . . Megascops p 181 
2 . Without ear tufts. 
o’ £ arsus more f^an twice as long as middle toe. Speotyto, p. 189. 
3 . Tarsus less than twice as long as middle toe. 
4. Tarsus scantily haired. Micropallas, p. 191. 
4 . larsus densely feathered. 
5. Ear openings very large, the two unlike. 
Nyctala, p. 179. 
Fig. 241. 
o . Ear openings 
OlAACA/AA, 
1'. Large, wing 11.50-19.00. 
Glaucidium, p. 190. 
Fig. 242. 
2. With ear tufts. 
3. Ear openings small. Bubo, p. 185. 
3'. Ear openings large, reaching almost to top of skull. 
Asio, p. 175. 
2'. Without ear tufts. 
3. Wing 9 inches.Surma, p. 188. 
3'. Wing 12 to 19. 
4. Ear openings small, the two ears not distinctly dif¬ 
ferent . Nyctea, p. 187. 
4'. Ear openings very large, the two strikingly dif¬ 
ferent. 
5. Toes feathered to claws. . Scotiaptex, p. 179. 
5'. Tips of toes exposed . . . Syrnium, p. 177. 
GENUS ASIO. 
General Characters. — Ear openings immense, almost equal to height of 
skull; ear tufts more or less developed; wings about twice as long as tail; 
feet closely feathered to ends of toes. 
KEY TO ADULTS. 
1. Ear tufts short. accipitrinus, p. 177. 
1'. Ear tufts long. wilsouianus, p. 175. 
366. Asio wilsonianus (Less.). Long-eared Owl. 
Ear tufts dark brown, conspicuous; face mainly yellowish brown; under 
parts whitish and yellowish, with dark brown shaft streaks and hori¬ 
zontal bars on belly: flanks yellowish brown, unspotted; upper parts 
