330 MANUAL OF PHILIPPINE BIRDS. 
note. We secured a fine series of specimens in this way. In a few cases 
we observed H. semigaleatus feeding in low brush, and even on the 
ground. ‘This species has a high@eveloped oil-gland the secretion from 
which is gamboge-yellow. When the feathers are well oiled the color of 
the whole bird is changed. Feeds on fruit. 
“Two males measure, 883 in length; wing, 385; tail, 305; tarsus, 
57; middle toe with claw, 74. Six females, length, 830; wing, 361; 
tail, 298; tarsus, 53; middle toe with claw, 71.” (Bourns and Wor- 
cester MS.) 3 
Genus ANTHRACOCEROS Reichenbach, 1849. 
Casque small, compressed and rounded on top, its outline gently 
curved, rounded and vertical behind, and continuous with culmen in front ; 
very fine striz near base of bill; chin and upper throat partly feathered. 
292. ANTHRACOCEROS MONTANI (Oustalet). 
MONTANO’S HORNBILL, 
Buceros montani OUSTALET, Bull. Hebd. Assoe. Scien. Fr. (1880), 205. 
Anthracoceros -montani GRANT, Cat. Birds Brit. Mus. (1892), 17, 370; 
SHARPE, Hand-List (1900), 2, 64; McGrecor and WorcEsTER, Hand- 
List (1906), 55. 
Sulu (Montano & Rey, Bourns &Worcester) ; Tawi Tawi (Bourns & Worcester). 
Adult (sexes alike).—Tail white; remainder of plumage black; back 
and wings slightly glossed with green. A female measures: Wing, 290; 
tail, 260; bill from nostril, 101; tarsus, 52. This species has been 
described as having the tail entirely white but in a female specimen 
collected in Tawi Tawi, November 2, 1891, by Bourns and Worcester, two 
rectrices on one side have the outer web black for about three-fourths 
of the distance from base to tip and one feather on the other side of 
the tail has the outer web black to a less extent; the inner webs, also, 
are black for a short distance on two of these feathers. More specimens 
are necessary to determine whether this is an individual variation or a 
normal character, perhaps dependent upon age, which has been previously 
overlooked. 
“We were fortunate enough to secure a series of fourteen specimens of 
this rare hornbill from Sulu and Tawi Tawi. The tail is pure white; all 
other parts black, the feathers of the back and wings glossed with dark 
green. The bill in adult birds is coal-black; all of our adult males had 
the iris nearly white, while in the adult females it was dark brown; legs 
and feet dull leaden, nails black. Young birds have the tip of the bill 
white or pale horn. 
“Common on the hills back of the town of Sulu, and very abundant 
in Tawi Tawi where it occurs in great flocks, but very wild and extremely 
difficult to approach. The ery of this bird is the most peculiar bird-note 
