OWLS. 399 



1 , Bubo maxinms. Great Eagle-Owl. Tufts of about eighteen 

 feathers, projecting more than two inches ; upper parts varie- 

 gated with (lark brown and light reddish-yellow ; lower parts 

 of the latter colour, with longitudinal blackish-brown spots and 

 streaks, and numerous transverse undulating lines. 



GENUS IV. ULULA. HOOTING-OWL. 



Bill short, strong, with its upper outline decurved from the 

 base ; nostrils large, elliptical or roundish ; conch more than 

 half the height of the head, extending from the level of the 

 upper part of the eye to the base of the lower jaw, fringed, and 

 having anteriorly an elevated semicircular, stiff, operculum, 

 beset with slender feathers ; facial disks very large and com- 

 plete ; ruff conspicuous and complete ; head extremely large, 

 and round ; tarsi very short, and with the toes densely feather- 

 ed ; wings much rounded, with the fourth quill longest, the 

 first about the length of the tenth. 



1. Ulula Ahico. Tawny Hooting-Owl. Greyish-brown, 

 mottled and longitudinally streaked with dark brown. Young 

 birds brownish-red, similarly marked. In all, large white spots 

 on the wings. 



2. Ulula Tengmalmi. Tengmalm's Hooting-Owl. Upper 

 parts liver-brown spotted with white, lower yellowish- white 

 with longitudinal brown markings ; tarsi and toes with long soft 

 downy feathers, which distinguish it from Syrnia psilodactyla, 



GENUS V. ASIO. TUFTED OWL. 



Bill short, of moderate strength, with its upper outline 

 slightly decurved from the base ; nostrils large, oblong, ob- 

 lique ; conch of extreme size, extending from over the middle 

 of the eye to the base of the lower mandible, of a semilunar sub- 

 elliptical form, having anteriorly in its whole length an oper- 

 culum stiffened with long narrow feathers, and posteriorly a 

 broad membranous fringed membrane ; facial disks very large 

 and complete ; ruff conspicuous and complete ; head very large, 

 subtrigonal, witli two small tufts ; tarsi short and with the toes 



