1 



104? BUCEROTIMI. 



nensls and A. bengalensis do, but only occurs on rivers and the 

 larger lakes. 



FAMILY, Bucerotidae. 



Bill enormous, arched or curved, often with an appendage or 

 casque on the upper mandible ; nostrils small at the junction 

 of the casque with the bill, or near the culmen, when there is 

 no casque ; wings short, rounded ; tail long, of ten feathers ; tarsus 

 short, stout ; feet moderately large, syndactyle ; hind-toe short ; 

 claws short, thick, well curved. 



GENUS, Dichoceros. 

 GENUS, Homraius. 



Bill with a broad flat casque, extending backwards over the 

 head, for more than half the length of the bill, and descending 

 to meet the bill at a right angle, of large size ; plumage black 

 and white. 



Dichoceros cavatus, Shaw. 



14,0. Homraius bicornis, Lin. Jerdon's Birds of India, Vol. I, 



p. 242 ; Butler, Deccan, &c. ; Stray Feathers, Vol. IX, p. 383. 

 THE GKEAT HORNBILL. 



<?. Length, 45 to 47 ; expanse, 63 to 66 ; tail, 15'5 to 1675 ; 

 wing, 18-25 to 19; tarsus, 273 to 3; bill from gape, 975 to 

 10'6. 



? Length, 4175 to 44; expanse, 54 to 59'28; tail, 14'5 

 to 1775 ; wing, 17'25 to 18'25 ; tarsus, 2'45 to 275 ; bill from 

 gape, 8-25 to 9. 



General color of bill and casque yellow, paler on the lower 

 mandible, but varying much in depth of color. 



The upper mandible is more or less tinted with red at the tip 

 and with orange in the medial portion ; the sides of the casque 

 have generally an orange tinge, and the flat or rather curved 

 portion of the casque is generally tinged with orange, intermin- 

 gled with red. 



In some specimens the coloration is very bright, in others the 

 whole bill and casque is duller and paler. 



In the male, the posterior portion of the casque, a triangular 

 patch on each side of the casque in front, and the truncated por- 

 tion of the culmen from three to five inches downwards from the 

 anterior margin of the casque, are black. 



In the female, the posterior portion of the casque is red ; there 

 is no patch on the side of the casque, and the truncated portion 

 of the culmen in front of the casque or more is red. 



In the male the irides are blood-red ; in the female pearly- 

 white ; the orbital region dark fleshy-pink ; the eyelids black. 



The legs and feet are dull greenish-plumbeous, or pale dingy 

 glaucous-green ; claws dark greenish-horny. 



