48 Field Museum of Natural History — Zoology, Vol. XIIL 



Micropallas graysoni (Ridgway). Socorro Elf Owl. 



Micrathene graysoni Ridgway, Auk, 1886, p. 333 (Socorro I., Revillagigedo, 



Group of W. Mexico). 

 Micropallas graysoni Ridgway, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 810, 



Range: Socorro Island, off western Mexico. 



Family TYTONID.E. Barn Owls. 



Genus TYTO Billberg." 

 Tyto Billberg, Syn. Faunae Scand., I, pars 2, 1828 (Type Strix flammea Linn.). 



*Tyto perlata perlata (Licht.)^. Brazilian Barn Owl. 



Strix perlata Lichtenstein, Verz. Doubl., 1823, p. 59 ("Brasil"); Goeldi, Alb. 



de Aves Amazon, pt. 3, 1906, pi, 42, Fig. 3; Descourtilz, Om. Bras., 1852, 



PI. 5, Fig. 2. 

 Strix flammea Sharpe, Cat. Bds. Brit. Mus., II, 1875, p. 291, part. 

 Tyto perlata Scott and Sharpe, Rep. Princeton Univ. Exped. to Patagonia, 



II, Om. pt. IV, 1915, p. 712; Chubb, Bds. Brit. Guiana, I, 1916, 



P- 295- 

 Range: Brazil, Argentina, Chile, and Patagonia ;° British Guiana? 

 i: Brazil (Itacoatiara, Amazonas). 



Tyto perlata contempta Hartert.^ Ecuador Barn Owl. 



Strix flammea contempta Hartert, Nov. Zool., V, 1898, p. 500 (Cayambe, alt. 

 9223 ft., N. W. Ecuador). 



Range: N. W. Ecuador. 



*Tyto perlata stictica (Madarasz) .° Venezuelan Barn Owl. 



Strix stictica Madarasz, Ann. Mus. Hung., II, 1904, p. 115 (Merida, Venezuela). 



Range: Venezuela. 



i: Venezuela (Encontrados, Zulia). 



"See Ridgway, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 600 and Beddard, 

 Ibis, 1890, p. 298. 



■^According to Chubb, Bds. British Guiana i, 19 16, p. 502 (attenda), Strixa perlat 

 Lichtenstein, 1823, is preoccupied by 5/rix perlata Vieillot, 1816, and the name of 

 the American bird should be changed to tuidara, Griffith and Piggeon. 



<= Birds from the Rio Chico region, Patagonia, may prove separable on account 

 of their smaller size and pale plumage. 



^ Tyto perlata contempta Hartert: A dark form approaching T. punctatissima 

 Gray from the Galapagos Island, but much larger; a large black spot in front of the 

 eye; wing, 3.10 mm. 



" Tyto perlata stictica (Madarasz) : Differs in ground color of the back, which 

 appears grayish lilac b'-own instead of gray; wing, 3.34 mm. 



