T
Adult Male.—Bill light yellow, with a black spot at base of mandible. A casque rises from
tlie base of the culmcn, extends backwards over the centre of the head, then curves forwards, and
returns to the cubncn by almost a right angle, at about one thu-d its length from the tip of the
maxilla. This is compressed laterally at both its anterior and posterior terminations, swelling
outwards in the centre, hut inoliaing to a keel-shapc on top along its entire length. This casque
is yellow like the hOl, black on its anterior face, and with a broad black patch occupying nearly
half the anterior portion, but wliieh does not roach to the maxilla. Naked skin around the eye
and on sides of the throat ilesh-colour. Head, neck, throat, upper part of breast, back, wing, and
central tail-feathers black, with dark green reflections. Entire underparts, thighs, and tips of the
secondaries and primaries pure white. Lateral tail-feathers have their apical third pure white,
rest black, with green reflections. Tarsi and feet black.
Total length from base of maxilla to end of central reetrices 23i inches, wing 10|, tail 11^,
bill along gape 5^, casque on top height at base of maxiUa l i , height of hill and casque at
base 2f, tarsus 1|-.
The figm-cs in the I'late were drawn from the type in the Paris Museum.
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