— -" . :_ 



i 



Adult Male. — Bill light yellow, with a black spot at base of mandible. A casque rises from 

 the base of the culmen, extends backwards over the centre of the head, then curves forwards, and 

 returns to the culmen by almost a right angle, at about one third its length from the tip of the 

 maxilla. This is compressed laterally at both its anterior and posterior terminations, swelling 

 outwards in the centre, but inclining to a keel-shape on top along its entire length. This casque 

 is yellow like the bill, black on its anterior face, and with a broad black patch occupying nearly 

 half the anterior portion, but which does not reach to the maxilla. Naked skin around the eye 

 and on sides of the throat flesh-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 rectrices 23^ inches, wing lOf , tail 1H 

 bill along gape 5£, casque on top 4|, height at base of maxilla 1J, height of bill and casque at 

 base 2f , tarsus If. 



The figures in the Plate were drawn from the type in the Paris Museum. 





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