BIRDS FROM SIAM AND THE IMALAY PENINSULA 193 



in February. Ogilvie-Grant ®° records it from Patani and S. Perak; 

 Robinson ^^ from Lani^kawi, Tern tan, and Butang; de Schauensee *' 

 from Khun Tan, Kengkoi, and Nakon Sritamarat. He also saw a 

 «mall flock on Doi Sutep. 



HYDROCISSA MALAYANA (Raffles) 



Buceros malayavus Raffles, Trans. Linn. Soc. London, vol. 13, p. 292, 1822 

 (Malacca). 



Dr. W. L. Abbott collected two males and two females in Trang 

 (Lay Song Hong, September 16-December 21, 1896; Trang, Janu- 

 ary 22, 1899) and two females, Endau River, eastern coast of Johore, 

 July 9, 1901. He gives the soft parts as: Iris dark red (male) or 

 dark brown (female); bill ivory white, base black, naked angle of 

 jaw black; feet and claws black. 



Apparently there are no previous records for this species in Siam. 

 The species ranges from Borneo and Sumatra to the Malay States 

 and northward in Peninsular Siam to Trang. 



Two of the above specimens are immature. One is a male from 

 Lay Song Hong, Trang, November 14, and the other is a female 

 from the Endau River, Johore, July 9. They differ from the adult 

 only in the development of the casque and the color of the bill and 

 casque, which is brownish black. Apparently it takes some time for 

 the casque to reach final development, as another female in which 

 the bill and casque are ivory white has the latter not reaching the 

 full development of the adult female. 



RHYTICEROS UNDULATUS (Shaw) 

 Buceros undulatus Shaw, General zoology, vol. 8, pt. 1, p. 2G, 1811 (Java) 



One immature male, Nong Khor, near Sriracha, November 16, 

 1924; one adult female, Koh Chang, January 13, 1926. 



Dr. W. L. Abbott collected four males and one female in Trang 

 (Prahmon, March 3, 1896; Lay Song Hong, November 4-26, 1896); 

 two males, Tenasserim (Tanjong Badak, January 6, 1900; Telok 

 Krang, February 17, 1904); and two males. Chance Island, Mergui 

 Archipelago, December 29, 30, 1899. He describes the soft parts 

 as (male): Iris orange, brownish orange-red, red, or brick red; orbital 

 skin dull red, reddish purple, pale purplish red; bill dirty bluish white, 

 base reddish brown; casque white, brownish posteriorly; grooves 

 dark brown; gular pouch yellow with interrupted transverse bar of 

 black; feet and claws black. The female is described as differing 

 from the male by having the gular pouch blue with a dark transverse 

 bar which is interrupted in the middle. The weight of the two males 



M Fasciculi Malayenses, pt. 3, p. 107, 1905. 



" Journ. Federated Malay States Mus., vol. 7, p. 150, 1917. 



" Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 263, 1934. 



