the District of Lainpong, S.E. Sumatra. 293 



Buceros niger, Vieillot, N. Diet. iv. p. 592 (1816), ex Le 

 VailL t. 20, 21. 



Buceros annulatus, Dumont, Diet. Se. Nat. vi. p. 21 0(1817), 

 ex LeVaill. t. 20, 21. 



Buceros pusar an, Raffles, t. c. p. 293, $ juv., "Sumatra^' 

 (1821). 



Buceros annulatus, Drapiez, Diet. Class. d'Hist. Nat. iii. 

 p. 32 (1828), exLevaill. t. 20, 21. 



Buceros ruficolJis, Vieill. apud Blyth, J. A. S. B. xii. p. 176 

 (1843), nee Vieill. 



Buceros pucoran, Raffles, Blyth, J. A. S. B. 1843, p. 990. 



Buceros plicat us, Lath, apud Sundev. Om Le Vaill. Ois. 

 d'Afr. p. 50 (1857), nee Lath. 



Calao plicatus (Lath.), Bp. Consp. i. p. 90 (1854), nee Lath. 



Rhyticeros plicatus (Lath.), Horsf. & Moore, Cat. E.I. C. 

 Mus. ii. p. 598 (1856-58), nee Lath.; Moore, P.Z.S. 1859, 

 p. 451. 



Rhytidoceros obscurus (Gra.), Salvad. Ucc. Born. p. 85, 

 " Sarawak " (1874), nee Gm. 



An adult, seemingly an aged male, is in Mr. Buxton^s 

 Lampong colleetion. That gentleman, in his notes, describes 

 the naked gular skin as being yellow, " with a blaek bar and 

 greenish tinge. ^^ This bar is evident on the dried skin. Dr. 

 Cantor has described the gular pouch of the Malaccan male as 

 being '^rich gamboge-yellow, with two transverse blaek bars " 

 (Horsf. & Moore, /. c.*), that of the female as ''dirty azure, 

 with two transverse black bars,^^ of the young male as " yellow, 

 with the transverse black bars indistinct." In a Malaccan 

 example of an adult male I find traces of only one black bar. 

 Schlegel (Mus. P.-Bas. Buceros, p. 2) states that the Javan 

 bird has an oblique blue bar across the throat of the male, 

 but does not mention any bar on that of the female. 



The title of this Hornbill has been by most ornithologists, 

 commencing with Latham, confounded with that of the strictly 

 and only Papuan member of this family, Buceros ruficoUis, 

 Vieill. The first notice of the Papuan species occurs in Bon- 



* In his later account (I. c.) Mr. Moore omits all mention of the two 

 transverse black bars. 



SER. IV. VOL. 1. X 



