FAMILY STRIGIDAE 183 



begun. As stated, they are white, but slightly nest-stained, with the 

 shell somewhat roughened. In form both are well-rounded elliptical. 

 They measure 43.7x37.4 and 43.7x37.8 mm. 



The range outlined is based on my personal observations, and on 

 specimens examined. The Rothschild collection in the American 

 Museum of Natural History has 2 skins from Chiriqui purchased 

 from the dealer Rosenberg, a male labeled "Volcan, 9,000 feet, Sept. 

 20, 1904," and a female marked "Boquete, 3,500 feet, Oct. 17, 1904." 

 From the date it is probable that they were collected by Watson, pos- 

 sibly lower down than stated, perhaps at Frances, since the species 

 elsewhere is one of the lowlands. The record by Festa (Salvadori 

 and Festa, Bol. Mus. Anat. Comp. Torino, vol. 14, 1899, p. 10) for 

 a specimen of this owl from Colon is certainly an error. On his expe- 

 dition to Panama and Ecuador Festa numbered his specimens in 

 sequence. He arrived in Colon May 27, 1895, but remained there only 

 briefly. In his list he mentions 2 skins of the blue-black seedeater from 

 Colon with catalog numbers 9 and 10. He states that in addition to 

 his own collections, while in Panama (i. e., in Panama City) he se- 

 cured some skins from Chiriqui prepared by the well-known collector 

 Arce. In regard to these he adds "pochi-sono gli uccelli di Colon," 

 obviously in error as Arce is not known to have collected there. The 

 owl listed with the number 174 is in the series of numbers for the 

 Arce material, with number 173 and 175 both indicated from "Chi- 

 riqui." 



AEGOLIUS RIDGWAYI RIDGWAYI (Alfaro) : 

 Central American Saw-whet Owl; Buhito Moreno 



Cryptoglaux ridgwayi Alfaro, Proc. Biol. Soc. Washington, vol. 18, October 17, 

 1905, p. 217. (Candelaria Mountains, near Escasu = Cerros de Candelaria, 

 near Escazu, Costa Rica.) 



Small, without feather horns ; plain dark brown above, buff below, 

 without streaks or bars. 



Description. — Length 185-190 mm. Adult (sexes alike), crown, 

 back, greater and middle wing coverts dark brown ; wing and tail dark 

 grayish brown ; a slight edge of white on alula, and a more restricted 

 line of the same color on the outer margin of the three outermost 

 primaries; bristly feathers in front of eye black; forehead and a 

 narrow line above eye white (partly concealed) ; cheeks brown like 

 crown, with the feathers white basally ; under surface, including 

 feathered tarsus, buff, with an indefinite band of cinnamon-buff across 

 breast; toes white, feathered to proximal base of outermost segment; 



