104 BUCEROTID. 
mensis and A. bengalensis do, but only occurs on rivers and the 
larger lakes. 
Famity, Bucerotide. 
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. 
140. —Homraius bicornis, Lin.—Jerdon’s Birds of India, Vol. I, 
p. 242; Butler, Deccan, &c. ; Stray Feathers, Vol. 1X, p. 383. 
THE GREAT HORNBILL. 
$. Length, 45 to 47; expanse, 63 to 66; tail, 15°5 to 16°75; 
wing, 1825 to 19; tarsus, 2°73 to 3; bill from gape, 9°75 to 
10°6. 
?- Length, 41°75 to 44; expanse, 54 to 59°28; tail, 14°5 
to 17°75; wing, 1725 to 1825; tarsus, 2°45 to 2°75; 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. 
