464 BULLETIN 17 2, UNITED STATES NATIONAL MUSEUM 



In 1929, on the strength of a single female, I separated the Siamese 

 bird. This specimen was aberrant; the breast and belly bad a rather 

 wade white line down the center. Soon after publication de Schauen- 

 see,*^ and later Chasen and Kloss,^'* rightly questioned its status. De 

 Schauensee, on his tliird expedition, took specimens resembling the 

 type of celsa.^* 



In Siam this form has been taken onl}'^ in the north, in the Khim. 

 Tan Mountains, Doi Sutep, Chiengdao, and Doi Nangka. Robinsoa 

 and Kloss ®^ say they have specimens from Kao Luang, Nakon Srita- 

 marat; this is the only Peninsular Siam record apparently. It is a 

 mountain form and occurs from the Himalayas to Burma, Yunnan, 

 Siam, French Laos, Tonkin, and North Annam. 



A darker form, R. a. atrata Salvadori, is recognized from Sumatra 

 and the Malay States, and a lighter form, R. a. cinerescens Delacour, 

 from southern Annam. 



RHIPIDURA PERLATA S. Mullcr 



Rhipidura perlala S. MxJller, Verhandelingen over de natuurlijke Gcschiedenis 

 der Nederlandsche overzeesche bezittingen . . . , pt. 7 or 8, p. 185, note, 1843 

 (Sumatra) . 



Dr. W. L. Abbott collected three males and one female in heavy 

 forest in Trang (Trang, February 18, 27, 1897; Kao Nok Ram, 1,500 

 feet, December 28, 1898); one male, Endau River, eastern coast of 

 Johore, July 16, 1901; and one male, Rumpin River, Pahang, June 5, 

 1902. He describes the soft parts as: Iris dark brow^n; bill black, 

 whitish beneath; feet and claws dark brown. 



The species ranges from Borneo and Sumatra to the Malay States 

 and north in Peninsular Siam to Trang. I have seen no previous 

 record north of the Malay States. 



The United States National Museum possesses a small series from 

 Borneo and the above series from the Malay Perdnsula, but only one 

 male from Sumatra. In plumage there is no appreciable difference 

 between the series. 



The wings in six males from the Malay Peninsula measure 82-90 

 (86.7) ; three from Borneo, 79-86 (83.3) ; one from Sumatra, 87 mm. 



The species can be easily distinguished from the others of the genus 

 inhabiting Siam in being dark slatj^ gray above and on the throat and 

 chest, the breast white, the throat and chest with tear-shaped white 

 spots. 



» Prop. Acad. Nat. Sci. Philadelphia, vol. 81, p. 547, 1930. 

 •3 Journ. Siam Soc. Nat. Hist. Siii)pl., vol. S, p. 250, 1932. 

 M Proc. Acad. Nat. Sci. Philadelphia, vol. 80, p. 220. 1934. 

 M Journ. Nat. Hist. Soc. Siam, vol. 5, p. 238, 1924. 



