I76 BIRDS OF THE REPUBLIC OF PANAMA — PART 2 



to that of the spotted owl, Strix occidentalis, which has a weight about 

 double that of the mottled owl. 



In Costa Rica this owl is called olopopo (a name applied also to the 

 spectacled owl). 



Two races separated by depth in color are known from the Isthmus. 



Figure 28. — Mottled owl, buho montanes, Ciccaba virgata. 



CICCABA VIRGATA CENTRALIS Griscom 



Ciccaba virgata centralis Griscom, Bull. Mus. Comp. Zool., vol. 69, April 1929, 

 p. 159. (Chivela, Oaxaca, Mexico.) 



Characters. — Coloration paler in both light and dark phases; more 

 grayish brown above ; the light phase whiter on the breast and 

 abdomen. 



Measurements. — Males (9 from Costa Rica and western Panama), 

 wing 208-226 (218.8), tail 115.7-131.0 (123.2), oilmen from cere 

 17.3-197 (18.3, average of 8) mm. 



Females (6 from Costa Rica and western Panama), wing 237-244 

 (240), tail 129.0-141.0 (136.4), oilmen from cere 17.5-20.3 (19.3) 

 mm. 



