12 ASIONIDZ. 
M. Boucard obtained a specimen at Cinco Sefiores in Oaxaca, as recorded by Mr. Sclater 
in 18583, and since then Don F. Ferrari-Perez secured one at Chimalpa in the Valley 
of Mexico: these are the only two records we have of the existence of the species in 
Mexico; and though it no doubt occurs throughout the mountain regions of Central 
Mexico, it appears to have escaped the notice of Sumichrast and Herrera. In 
Guatemala still less is known of it, for a stuffed specimen in a small collection of birds 
made by Don Valentin Escobar in the neighbourhood of Quezaltenango, which Salvin 
examined in the city of Guatemala in July 1873, is the only one we have seen from that 
country. This bird was in the young brown plumage with white eyebrows, formerly 
known as NV. albifrons. N. acadica has never been seen southward of Guatemala. 
From Dr. Fisher’s analysis of the food of this Owl’, it would appear to consist to a 
large extent of mice, and only occasionally of small birds and insects. 
Aurium operculo nullo. 
Cornutt. 
BUBO. 
Bubo, Cuvier, Régne Anim. 1817, p. 831; Sharpe, Cat. Birds Brit. Mus. ii. p. 12. 
The range of Bubo is very extensive, and includes the greater part of the world, 
except Australia, New Zealand, Oceania, New Guinea, and the Moluccas. Of the 
seventeen or eighteen species distributed over this wide area, only three closely allied 
forms occur in America, of which B. virginianus is by far the commonest and most 
widely dispersed, being found alike in North, Central, and South America, and in the 
latter countries it is by far the largest of the Striges. 
The ear-tufts are large and conspicuous in Budo, the cere of the bill is not tumid, 
the nostrils oval and placed at the margin of the cere, the wings are comparatively 
short, not reaching to the end of the tail, and the tarsi are always densely feathered at 
least to the base of the toes, and in the case of B. virginianus the toes also are densely 
feathered. 
1. Bubo virginianus. 
Great Horned Owl, Edwards, Nat. Hist. Birds, ii. t. 607. 
Strix virginiana, Gm. Syst. Nat. i. p. 2877. 
Bubo virginianus, Scl. P. Z. 8. 1859, p. 390°; 1860, p. 2534; Scl. & Salv. 1860, p. 276°; Salv. 
P. Z. S. 1870, p. 216°; Cat. Strickl. Coll. p. 4727; Lawr. Ann. Lyc. N. Y. ix. pp. 182°, 
207°; Bull. U. 8S. Nat. Mus. no. 4, p. 37; Dugés, La Nat. i. p. 138" v. Frantz. J. f. 
Orn. 1869, p. 366"; Sharpe, Cat. Birds Brit. Mus. ii. p. 19”; Sumichrast, La Nat. v. 
p. 237°; Herrera, La Nat. (2) i. pp. 178, 821”; Bendire, Life Hist. N. Am. Birds, i. 
p. 876, t. 12, f.12"; Fisher, Bull. U.S. Dep. Agr. no. 9, p. 174, t. 24, 
Bubo virginianus, var. virginianus, &c., Ridgw. in Baird, Brew., & Ridgw. N. Am. Birds, iii. 
p. 62*. 
