Adult male, light phase, type.--Feathers of head and neck heavily streaked with blackish brown, the edges more or less notched with whitish and light rufous; ear-tufts also blackish, but edges rufous; back dark rufous, finely speckled with blackish, clearer rufous on upper tail-coverts; each outer scapular with a large white spot on outer web followed by a blackish spot on tip and bordered toward base by a dark brown line; chin and upper throat whitish with narrow brown shaft-stripes, the webs marked more or less with cinnamon; remainder of under parts dark cinnamon, more or less cross-barred with white and dark brown, each feather with a blackish brown shaft-stripe; the coloration heaviest across upper breast because of the greater width of the shaft-stripes and reduction of the white areas; middle of abdomen almost pure white; flank-feathers with narrow shaft-lines and wide white bars; thighs rufous-brown; wings mostly sandy cinnamon more or less mottled with brown; outer webs of primaries regularly notched with five or six spots of white or whitish cinnamon, bordered with dark brown; similar notches on secondaries but less prominent owing to darker color of spots; quills below brownish with slightly lighter, irregular, and almost obsolete bars; alula with similar light notches on outer webs, on the first feather the notches are white; coverts generally uniform, but some feathers of median series with large white patches on outer webs; tail similar to the back with about eight irregular and nearly obsolete cross-bars; short plumulaceous feathers below and behind the eye finely mottled with pale cinnamon, brown, and whitish; behind ear, feathers of the incomplete ruff broadly tipped with blackish brown forming a prominent dark band on side of head; bristle-like feathers of lores with bases whitish, tips blackish brown, the longest about 20 mm.; anterior bristles pale cinnamon; tarsus feathered to base of toes. Bill, cere, and feet dirty brown; nails horn-brown; iris yellow. Length, 235; wing, 170; tail, 82; culmen, 23; tarsus, 35; middle toe with claw, 33. Adult female, light phase.--Not greatly different from the male, but white notches on primaries and alula with a cinnamon wash. Length, 235; wing, 175; tail, 88; culmen (tip broken), 21; tarsus, 35; middle toe with claw, 32. Red phase.--The pattern of coloration is the same as in the light phase; white and whitish markings nearly all replaced by rufous; chin and upper throat and modified feathers below and behind eye almost clear rufous; blackish brown markings on breast very wide; a few whitish bars on abdomen and flanks. 218. OTUS CALAYENSIS McGregor. CALAYAN SCREECH OWL. Otus calayensis McGregor, Bull. Philippine Mus. (1904), 4, 17; McGregor and Worcester, Hand-List (1906), 46. Cok-cok bá-buy, Calayan. Calayan (McGregor).