MONOGRAPH OF THE OWLS — STR1G1DJ2 
4. B. maximus , Strix bubo , Linn. ; Gould, 37, The veil or 
margin-feathers of the ear, not bounded by a black stripe. A 
handsome variety exists in the northern regions, which is very light 
coloured, nearly white. This is the Bubo sibiricus, Eversm.; Gray 
and Mitchell, Genera of Birds ; Susemihl Vogel Europas. From 
Prince Buonaparte we learn that the Bubo virginianus , in high 
northern latitudes, also changes to a similar colour. The Bubo 
capensis, Baud., Africanus steph. Vaill. Ois. d’Afr. t. 40 ; Smith, 
111. S. Afr. Zool. B. t. 70, is not a distinct species ; it has too few 
characters to separate it as a good species from the Bubo maximus . 
It may be possible that these mentioned varieties are subspecies from 
one and the same type ( Bubo maximus ). Europe, Africa, Asia. 
5. B. africanus , Boie; Str. Africana , Temm. PI. Col. 50; Otus, 
Cuv.; Bubo maculosus, Cass.; Str. Daud. ; Bubo cinerascens, Guer. ; 
Bubo dilloni, Desm. et Prcv. Larger than Syrn. aluco ; a black 
vertical stripe bounds the veil; feather-horns 60-70 mms. long, 
black with rusty yellow spots or bands ; wings 308-365 mms. long. 
The smallest species of the whole subgenus. It is spread over the 
whole of Africa. 
6. B. virginianus , Briss. ; Str. virginiana et Str. magellanicus , 
Gmel. ; Bubo virginianus et articus, Bicli. and Swains, t. 30 ; Bubo 
ludovicianus, Daud.; Str. crassirostris, Vieill.; Str. macrorhynclms , 
Temm., PI. Col. 62 ; Wils. t. 50 ; Aud. t. 61 ; PL Enl. 385 ; Vieill. 
t. 19. The veil bounded with a black vertical stripe ; the feather- 
horns 62-84 mm. long, black at the root, the inner web rufous; 
wings 360 mm. long. It has in proportion to its body the largest 
bill. I cannot find a true difference between virginianus and 
magellanicus. 
c. Subgenus Ketupa, Less. — Tarsus and toes naked ; the claws, 
except that of the middle toe, sharp and falcated ; the wings short ; 
first quill as long as the eighth ; the 1-4 curved, emarginated in 
the middle of the inner-web ; bill large, projected. The greatest 
part of species arc Asiatic ; only one species African. 
7. B. ceylonensis , Kp. ; Str. ceylonensis, Gmel. ; Ketupa ceyb 
G. Gray ; Str. leschenaulti , Temm. PI. Col. 20 ; Str. Jiardwickih 
111. Ind. Zool. pi. 31 ; Gultmunguis nigripes , Hodgs. The size ot 
h. virginianus ; the under side gray, with black shaft stripes and 
innummerable fine cross lines; feet* blackish. 
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