DR. J. J. KAUP’S MONOGRAPH OF THE STRIGIDA. 241 
6. Bupo vireinianus, Briss. 
Stria virginiana et Strix Bubo magellanicus, Gmel. 
Bubo virginianus et arcticus, Rich. & Sw. t. 30. 
—— ludovicianus, Daud. 
—— magellanicus, Cuv. 
Stria crassirostris, Vieill. Ois. Am. Sept. t. 19. 
—— macrorhyncha, Temm. PI. Col. 62. 
Bubo magellanicus, Cuy.; 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 light-rufous bands on the upper parts of the wings very 
irregularly zigzag pointed and margined. ‘Tarsi banded or uniform. 
We find varieties with 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 ( 2), 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. 
Diagn.—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 Pl. LVII. fig. 6.) 
Bill large, projected, and yellow. 
In the form of the falcated nails this division shows great affinity to the first subgenus 
(Lophostriz) and to the fifth subgenus (Pseudoptynz). 
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. Buso cryLonensis, Kp. 
Strix ceylonensis, Gmel. 
Ketupa ceylonensis, G. R. Gray. 
Strix Leschenaulti, Temm. Col. 20. 
