5. ANTHRACOCEEOS. 363 



J. As. Sgc. Bcng. xviii. p. 803 (1849) ; Gnu/, Tland-l B. ii. p. 128, 



sp. 7878 (1870). 

 Hydrocissa violaceus, Bonap. Consj). Gen. Av. i. p. 90 (18-50). 

 Hydrocissa (Anorrhinus) violaceus, Bonap. Consp. Vol. Anisod. p 2 



(1854). 

 Buceros monoceros, Shaw, Gen. Zool. riii. p. 8 (1811) ; Temvi. PL 



Col. ii. sp. 11 [text] (1823) ; M^affl. Si/st. Av. Buceros, no. 2 (1827) ; 



Beffbie, Malai/ Pen. p. 513 (1834) ; Miill. ^' Schl. Ver. Ges. Ned. 



Ind. p. 22 (1839-44). 

 Hydrocissa monoceros, Bonap. Con&p. Gen. Av. i. p. 90 (1850) ; id. 



Cons}}. Vol. Anisod. p. 2 (1854). 



Adult male. Head, middle of chin and throat, neck, back, rump, 

 upper tail-coverts, wing-coverts, and upper chest deep black glossed 

 ■with dark greenish blue ; primary and secondary quills bh\ck with 

 narrow white bases and wide white extremities, except the two 

 hrst primaries and the last three secondaries, which are black at 

 tlie extremity ; front of shoulders, breast, belly, thighs, ami under 

 tail-coverts white ; tail with two central rectrices black, sometimes 

 tipped with white, and the rest pure white ; casque and bill wax- 

 yellow, the former with a great black patch extending from the 

 anterior end to within one-fifth of the posterior extremity, which is 

 also black ; base of mandibles black ; naked skin blackish round the 

 eye ; gular region kid-white ; iris orauge-red ; legs and feet grey. 

 Total length 37 inches, wing 13'1, tail 12-7, tai-sus 2-5. 



Adult female resembles the male adult in plumage, and only 

 differs in having the i)osterior extremity of the casque yellow 

 instead of black, and the naked skin round the eye the same colour 

 as the gular region : "iris brown; legs aud feet grey; gular skin kid- 

 white." Total length 33 inches, wing 12-4, tail 12-4, tarsus 2-5. 



Young diif'er from the adult in having the basal half of the outer 

 rectrices black. As maturity is reached this black gradually and 

 irregularly disappears, beginuiug with the outer pair of feathers ; 

 sometimes one of the outer tail-feathers is pure white, while the 

 corresponding one on the other side is still suffused with black at 

 the base. 



A specimen from Ceylon with sliijhthj developed casque has all the 

 outer tail-feathers p!(/-e tvhite. ^Ying 11-2 inches, tail 10-9. 



Hah. Indian Peninsula and Ceylon, 



rt-c. Ad. etimm. sk. Behar. B. II. Ilodgsou, Esq. 



[P.]. 



d-(/. (S 2 ad. sk. Seoni. Hume Coll. 



h-r. S 2 ad. et Raipur, Jan., Dec. Hume Coll. 



imm. sk. 



s,t.S9- ad. sk. Muddur, Mysore, Jan., July. W.Davison,Esq.[P."'. 



u, V. cJ 2 iid. sk. Ratnagiri, Mar., Nov. Hume Coll. 



?r. c? ad. sk. S. Koukan, Nov. {G. Vidal). Hume Coll. 



X. Ad. sk. Anjango, Travancore, Dec. Hume Coll. 



y-a. Ad. et imm. Ceylon (i/. Nevill). Tweeddalo Coll. 



sk. 

 b' . Skeleton. 



