FAMILY TYTONIDAE 1 45 



white; under surface, including under wing coverts, white with scat- 

 tered dots of dark neutral gray on breast and sides. 



Tawny phase, light-colored, filamentous feathers of facial disk 

 tipped with cinnamon, with encircling band wider and darker; entire 

 upper surface dark gray, mottled faintly with white, with scattered, 

 short shaft streaks of black tipped with white; underlying buff 

 darker, as also the bands on wings and tail; under surface light 

 cinnamon-buff, with short shaft streaks of black tipped with white. 



Figure 20. — Barn owl, lechuza, Tyto alba guatemalae. 



Iris dark brown ; bill yellowish horn color ; toes, including claws, 

 and bare area of lower end of tarsus, dull dark brown to fuscous. 



Measurements. — Males (10 from El Salvador, Nicaragua, Costa 

 Rica, and Panama) wing 293-323 (309.3), tail 114.0-136.7 (126.5), 

 culmen from cere 19.7-22.5 (21.4), tarsus 67.8-77.2 (73.5). 



Females (10 from Guatemala, El Salvador, Nicaragua, Costa 

 Rica, and Panama), wing 293-334 (317.2), tail 123.0-136.0 (129.6), 

 culmen from cere 20.0-23.8 (22.3), tarsus 70.7-76.2 (73.2) mm. 



Resident. Found locally in small numbers throughout the low- 

 lands, casually in the mountains of western Chiriqui (1 record for 

 Quiel, above Boquete at 1,550 meters) ; my only record for Darien 

 is of 1 calling at night on the Rio Chucunaque, near the mouth of the 

 Rio Tuquesa. 



