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 highly developed 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.) 



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 stria? near base of bill ; chin and upper throat partly feathered. 



292. ANTHRACOCEROS MONTANI (Oustalet). 

 MONTANO'S HORKBILL. 



Buceros montani OUSTALET, Bull. Hebd. Assoc. Scien. Fr. (1880), 205. 



Anthracoceros montani GRANT, Cat. Birds Brit. Mus. (1892), 17, 370; 

 SHARPE, Hand-List (1900), 2, 64; McGBEooB and WORCESTER, Hand- 

 List (1906), 55. 



Sulu (Montana d Rey, Bourns dWorcester) ; Tawi Tawi (Bourns d 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 cry of this bird is the most peculiar bird-note 



