280 BULLETIN 17 2, UNITED STATES NATIONAL MUSEUM 



It has a shorter whig and culmen than the migrant race, D. m. 

 caihoecus and the tail with a deeper fork. The male measuresr 

 Wing, 128; tail, 144.5; middle tail feathers, 99; culmen, 18.5 mm. 

 The female: Wing, 133; tail, 156; middle tail feathers, 95; culmen, 

 18 mm. 



Just what range it has is not well known. Robinson and Kloss ** 

 say thej' have it from southern Tenasserim, southwestern and central 

 Siam, and southern Annam. De Schauensee ^^ records it from Bang- 

 kok and Chiengmai, 



The bird occurring in Java, it seems to me, belongs to a distinct 

 species. It is bluish black rather than greenish black and is separated 

 from its nearest relative to the north by a wide tract of country. 

 It should stand as D. javanus Kloss and is confined to Java. 



DICRUHUS LEUCOPHAEUS DISTURBANS Baker 



Dicrurtis leucophaeus disturbnns Baker, Nov. Zool., vol. 25, p. 293, 1918 (Amherst* 

 Tenasserim) . 



Dr. Smith took a single female at Nam Chi Hua, Burma, January 

 14, 1933. 



The United States National Museum possesses also two males 

 from the Raheng District, western Siam. They are from the collec- 

 tion made by Gairdner and reported upon by Chasen and Kloss,** 

 who have assigned them to D. I. mouhoti, but they are considerably 

 smaller than that form and somewhat lighter in color. 



The two Raheng males measure: Wing, 127.5-132; tail, 123-126.5; 

 middle tail feathers, 90.5-93; culmen, 21.5-22 mm. The female 

 from Burma: Wing, 131; tail, 132.5; middle tail feathers, 97,5; 

 culmen, 21 mm. 



Stuart Baker *** gives the range as the Malay Peninsula, Peninsular 

 Burma, and Siam as far north as Bangkok. 



The three birds recorded by Robinson and Kloss** from Koh 

 Sak, Hat Sanuk, and Nongkae as D. I. mouhoti, evidently belong^ 

 here. The measurement of the wing given by them is small. 



I do not know upon what basis Stuart Baker included the Malay 

 Peninsula in the range of this form. 



DICRURUS LEUCOPHAEUS HOPWOODI Baker 



Dicrurus leucophaeus hopwoodi Baker, Nov. Zool., vol. 25, p. 294, 1918 (Dacca). 



One male, summit of Doi Sutep, December 15, 1928. 



Dr. Smith took only this one specimen in northern Siam. It has 

 been compared with a series from Yunnan and agrees quite closely. 



" Journ. Nat. Hist. Soc. Siam, vol. 5, p. 342, 1921. 

 " Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 220, 10.14. 

 " Journ. Siam Soc. Nat. Hist. Suppl., vol. 7, p. 181, 192S. 

 ♦» The fauna of British India, Birds, ed. 2, vol. 2, p. 360, 1024 

 *• Journ. Nat. Hist, Soc. Siam, vol. 6, p. 342, 1924 



