"Young (type of species).--Above clear brown, with faint terminal margins of fulvous-brown, the buff-colored bases showing very conspicuously on all the upper parts, but especially distinct on the wing-coverts, which are also broadly margined with buffy white; quills deep brown, the secondaries lighter and more purplish brown, broadly tipped with buffy white, and indistinctly barred with darker brown, plainer on the inner web, especially underneath, where it is ashy white on the primaries and grayish on the secondaries; lower back and rump pale brown, the upper tail-coverts brownish buff; tail brown, tipped with buffy white and crossed with six equidistant bands of darker brown; head and neck whitish buff, the sides of the latter washed with sandy rufous, and mottled with dark brown in the centers of the feathers; under surface of body buffy white, washed with pale fawn-color on the sides of the body and thighs, with a few indistinct spots of the same on the chest; under wing-coverts white, spotted with dark brown, the spots larger on the greater series. Iris brownish. Length, 610; wing, 394; tail (not fully grown), 241; tarsus, 94. "Another young bird, collected by Mr. Wallace, is rather larger in general bulk than the foregoing example, though having the wing of the same length. It is purer white below, with a shade of dark brown on the lower flanks, and a few distinct oval spots of brown on the breast. The center tail-feather has seven bands of dark brown. "Nestling.--Covered with snow-white down, the crown of the head inclining to fawn-color, the sprouting feathers blackish brown, the greater wing-coverts tipped with white; the few breast-feathers visible white, with broad blackish cross-bars." (Sharpe.) A male was taken on Lubang Island. Iris brown, bill, cere, and nails black; feet pale yellow. Length, 610; wing, 400; tail, 260; culmen from base, 37; tarsus, 98. This species is an inhabitant of deep forest and is seldom seen. Genus PITHECOPHAGA Grant, 1896. Bill deep, greatly compressed, depth of upper mandible twice its width at edge of cere; culmen greatly curved for its entire length; nostril in a vertical slit near margin of cere; a very full crest of long feathers; wings rounded, rather short; inner webs of primaries slightly narrowed from middle to tip; tarsus slightly feathered in front at base; a row of transverse plates in front, sides and back with small hexagonal scales; feet powerful; tail-feathers wide and slightly graduated. 185. PITHECOPHAGA JEFFERYI Grant. MONKEY-EATING EAGLE.