DR. J. J. KAUP'S MONOGRAPH OF THE STRIGID^. 241 



6. Bubo virginianus, Briss. 



Strix virginiana et Strix Bubo magellanicus, Gmel. 

 Bubo virginianus et arcticus, Rich. & Sw. t. 30. 



ludovicianus, Baud. 



magellanicus, Cuv. 



Strix crassirostris, Vieill. Ois. Am. Sept. t. 19. 



macrorhyncha, Temm. PI. Col. 62. 



Bubo magellanicus, Cuv. ; Puch. Arch, du Mus. t. iv. p. 331 ; Wilson, t. 50; Aud. t. 61 ; 

 Enl. 385. 



Diagn. — The veil bounded with a black vertical stripe. The ear-horns 62-84 mm. 

 long, black at the root, the inner web rufous. Wing 360 mm. long. 



Descr. — In size between B. africanus and B. maximus. The under parts of the body 

 mostly with large black bands on a rufous and white ground ; on the breast near the 

 furcula and on the broad white throat with larger spots. White spots on the margin 

 of the shoulder-coverts, sometimes very indistinct. The tail on the under side with 

 six narrow bands. The hght-rufous bands on the upper parts of the wings very 

 irregularly zigzag pointed and margined. Tarsi banded or uniform. 



We find varieties witli more white, rufous, and grey ; others are nearly black ; others, 

 again, with white ground-colour. 



This species has, in proportion to its body, the largest bill. 



Dimens.— Head 95-106 ( ? ), bill from the gape 43-47, tail 205, tarsi 62-73, middle 

 toe 42-45 mm. long. 



Hab. The whole of the colder parts of America, as far as Mexico, California, 

 Chili, &c. 



I cannot find any true difference between B. virginianus and B. magellanicus. 



Subgenus c. Ketupa, Less. 



Diag-n.— Tarsi and toes naked. The nails, except the middle toe, sharpened and 

 falcated. The wing short ; first wing-feather as long as the eighth ; the first to the 

 sixth feebly emarginated in the middle on the inner web. (See PI. LVII. fig. 6.) 

 Bill large, projected, and yellow. 



In the form of the falcated nails this division shows great affinity to the first subgenus 

 (Lophostrix) and to the fifth subgenus {Pseudoptynx). 



Most of the species live in Asia, and only one species in Africa. Its flight must 

 be with a rush, like that of the next subgenus, because the wing-feathers are not so 

 elastic as in the true Bubo. 



7. Bubo ceylonensis, Kp. 

 Strix ceylonensis, Gmel. 

 Ketupa ceylonensis, G. R. Gray. 

 Strix Leschenaulti, Temm. Col. 20. 



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