AVES STRIGID^C. 685 



Nacurutu, Azara, Apunt. I. p. 192 (1802). 



Strix nacurutu, Vieill. N. Diet d'Hist VII. p. 44 (1817: ex Azara). 



Asio mage/fanicus, Less. Man. d'Orn. I. p. 116 (1828); Oberholzer, Proc. 



U. S. Nat Mus., xxvii, pp. 179, 188 (1904). 



Bubo virginianus, Fraser (nee Gm.), P. Z. S. 1843, P- no (Chili); Hartl. 



Iiul. Azara, p. 3 (1847); Cunningh., Nat. Hist. Str. Magell. pp. 91, 



277 (1871); Huds. P. Z. S. 1872, p. 549 (Rio Negro); Scl. & Salv., 



Nomcncl. Av. Neotr. p. 116 (1873); Doering Expl. al Rio Negro, 



Zool. p. 49 (1882 : Choelechoel, abundant); White, P. Z. S. 1883, p. 



433 (Cosquin, C6rdoba, Sept.); Barrows, Auk. I. p. 29 (1884: Arroyo 



de Gualeguaychu); Scl. & Huds. Argent Orn. II. p. 50 (1889); 



Frenzel, J. f. O. 1891, p. 115 (C6rdoba); Graham Kerr, Ibis, 1892. 



p. 141 (Fortin Nueve); James, New List Chil. B. p. 6 (1892). 



L'liiln crassirostris, Des Murs in Gay's Hist. Chil. Zool. I. p. 254 (1847), 



Bubo crassirostris, Burm. Reis. La Plata, II. p. 439 (1861 : Mendoza); 



Vincig. Boll. Soc. Geogr. Ital. (2) IX. p. 797 (1884); Carbajal, La 



Patagonia part II. p. 260 (1900). 



Bubo virginianus var. magellanicus, Baird, Brewer and Ridgw. B. N. Amer. 



III. p. 61 (1874). 

 GENERAL DESCRIPTION. 



Size. Adult male, 7949, P. U. O. C. Arroyo Eke, Patagonia, 14 May, 

 1898. A. E. Colburn, collector. 

 Total length, about 18.00 inches. 

 Wing, 12.00 inches. 

 Tail, 8.00 inches. 



The adult female is larger than the male, but similar in color ; length 

 about 20.00; wing 13.50; tail 8.50 inches. 

 Color. Adult male cited above. 



General color: Black, white and buff, as well as brown in varied and 

 modified pattern and shade ; vermiculated and indistinctly barred above ; 

 narrowly and regularly barred below. 



Head : With distinct and prominent ear-tufts about an inch and three- 

 quarters long; facial disk white, varied with dull buff and dusky, the 

 feathers with hair-like black shafts ; about the bill and lower part of facial 

 disk many stiff black hairs ; eyelid black ; facial disk defined by a clear 

 black band, starting in front of the eye and passing above; it becomes 

 broader on the posterior margin of the disk and again narrows at the 



