HORN-BILL. 



309 



5— CONCAVE HORN-BILL. 



Calao a casque concave, Levail. Ois. de I'Am. Sf hid. i. p. 13. pi. 5. 

 Calao, vel Cagao, Phil. Trans, xxiii. p. 1394. * 

 Bifid-casqued Hornbill, (var.) Shaitfs Zool. viii. p. 17. 

 Philippine Horn-bill, (var. A.) Gen. Syn.'i. p. 345. 



THE length of this is thirty-six inches ; the bill ten ; edges of 

 the mandibles dentated; gape seven inches, it is broader than that of 

 the Rhinoceros Horn-bill ; the helmet rounded on the sides, and the 

 back part blunt, taking the shape of the hind head ; at top it is 

 hollowed out into a sort of channel ; the front scoops out into a semi- 

 circle, but does not project into two horns as in the last described ; 

 both mandibles are serrated on their edges, the lower half of the base 

 of the upper, and the whole of that of the lower one black, ex- 

 cepting which, the general colour is that of yellow oker, but at the 

 point it inclines to red ; the eyelids, as in most of the genus, are 

 furnished with strong bristles ; the feathers on the crown, sides, and 

 round the eyes, and the chin, black ; from this to the middle of the 

 neck yellow rufous, those on the nape longer than the others ; the 

 rest of the body and wings black ; but the lower belly, thighs, vent, 

 and the whole of the tail (which is rounded at the end) dirty white ; 

 theleffs black. 



'&"- 



A. — In the third and fourth plates of Levaillant is another figure 

 of this bird, in which the whole of the body, wings, and tail, are 

 black. Whether this is a variety, or merely of a different sex, is yet 

 to be determined. In a drawing of one, in the collection of Sir J. 

 Anstruther, the feathers of the neck are not rufous, but pure white. 

 This is said to have been brought from the Eastern Islands. 



* Described by the Rev. J. G. Camel, a resident in the Philippine Islands. 



