ipi8. CATALOGUE OP BIRDS OF THE AMERICAS CORY. 27 



Otus watsonii (Cassin)* WATSON'S SCREECH OWL. 



Ephialtes watsonii CASSIN, Proc. Acad. Phila., IV, 1848, p. 123 (South America); 



Id., Journ. Acad. Nat. Sci. Phila., II, 1852, p. 95, pi. XII, Fig. i. 

 Scops usta SCLATER, Trans. Zool. Soc. Lond., IV, 1862, p. 265, tab. 6i. b 

 Pishorina watsoni HELLMAYR, Nov. Zool., XIV, 1907, p. 407; SNETHLAGE, Bol. 



Mus. Goeldi, VIII, 1914, p. 145. 

 Otus watsoni HELLMAYR, Nov. Zool., XVII, 1910, p. 414; CHAPMAN, Bull. Am. 



Mus. N. H., XXXVI, 1917, p. 253. 

 Pisorhina usta SNETHLAGE, Bol. Mus. Goeldi, VIII, 1914, p. 145 (RioTapajoz). 



Range: Eastern Peru, Ecuador, S. Venezuela, S. E. Colombia, 

 Brazil, N. Argentine. 



Otus guatemalae (Sharpe). GUATEMALAN SCREECH OWL. 



Scops brasilianus Subsp. B. Scops guatemalae SHARPE, Cat. Bds. Brit. Mus., 



II, 1875, p. 112 (Guatemala). 



Otus guatemalae RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 715. 

 Scops guatemalae SHARPE, Cat. Bds. Brit. Mus., II, 1875, pi. IX (larger fig.). 



Range: Southeastern Mexico to Guatemala; West Ecuador? 



Otus hastatus hastatus (Ridgway). MAZATLAN SCREECH OWL. 



Megascops hastatus RIDGWAY, Proc. U. S. Nat. Mus., X, 1887, p. 268 ("La Pa, 

 Lower Calif ornia"= probably Mazatlan, Sinaloa, Mexico, according to 

 Ridgway). 



Scops hastatus SALVIN and GODMAN, Biol. Centr. Am. Aves., Ill, 1897, p. 23. 



Otus hastatus hastatus RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 

 718. 



Range: Western Mexico (Sinaloa, Jalisco, Tepic). 



Otus hastatus thompsoni (Cole). YUCATAN SCREECH OWL. 



Otus hastatus thompsoni COLE, Bull. Mus. Comp. Zool., I, 1906, p. 123 (Chichen- 



Itza, Yucatan). 

 Otus hastatus thompsoni RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 719. 



Range: Yucatan. 



Otus cassini (Ridguuay). CASSIN'S SCREECH OWL. 



[Scops brasilianus] E. cassini RIDGWAY, Proc. U. S. Nat. Mus., I, 1878, p. 90, 102 



(Mirador, Vera Cruz, Mexico). 

 Otus cassini RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 720. 



Range: Eastern Mexico (State of Vera Cruz). 



Otus watsonii CASSIN: Approaches 0. c. crucigera (SPix) ; differs in having much 

 longer ear tufts, which are almost uniform black, with only a few minute dots of 

 buff on inner webs of the feathers; pileum blackish; back and tail blackish brown 

 (much darker than in O. choliba) with narrow buff vermiculations; no buff spots on 

 upper wing coverts; under parts deep fulvous (not whitish with buff patches). 



b Cf. Berlepsch, Bull. Brit. Orn. Club, XII, 1901, p. 10; Hellmayr, Nov. Zool., 

 XIV, 1907, p. 402; Chapman, Bull. Am. Mus. N. H., XXXVI, 1917, p. 253. 



