326 SPOLIA ZEYLANICA. 
The Fish and Eagle Owls are large birds with well-marked 
ear tufts, powerful beaks, stout legs and feet, the latter armed 
with powerful talons, and rounded wings. The Fish Owl, as 
suits its mode of life, has a naked tarsus ; the Eagle Owl has 
its legs feathered to the toes, and differs from most Owls in 
possessing a completely distinct immature plumage. 
The Owlets fall into three genera : Scops, with ear tufts and 
a streaky upper plumage ; Glaucidiwm, with no ear tufts and 
a barred upper plumage ; and Ninox, which is very hawk-like 
in appearance, as it possesses no ear tufts, and the ruff and 
facial disk are not developed. 
Rough Key to Ceylon Bubonine. 
I.—Size large ; length 20 or over ; ear tufts present. 
(1) Tarsus naked. 
Ketupa zeylonensis (The Brown Fish Ow}). 
(2) Tarsus feathered. 
Huhua nepalensis (The Forest Eagle Owl). 
11.—Size small ; length under 12. 
A.—Kar tufts well developed (genus Scops). 
(1) Wing abowt 5°25; third primary longest, 
first longer than eighth. 
S. giu (Scops Owl). 
(2) Wing about 5°85; fourth or fifth primary 
longest, first much shorter than eighth. 
S. bakkamena (Collared Scops Owl). 
B.—Kar tufts absent. 
(a) Upper plumage barred (genus Glaucidium). 
(1) Abdomen transversely barred. 
G. radiatum (Jungle Owiet). 
(2) Abdomen longitudinally streaked. 
G. castanonotum (Chestnut-backed Owlet). 
(6) Upper plumage not barred. 
Ninox scutulata (Brown Hawk Owl) 
