282 BULLETIN 17 2, UNITED STATES NATIONAL MUSEUM 



Four from southeastern Si am and two from southern Annam: Wing, 

 133.5-140 (137); tail, 125-140 (129.4); middle tail feathers, 95-101.5- 

 (97.3); culmen, 20-23 (21.8) mm. 



The two specimens collected by Dr. Abbott in Tenasserim are toa 

 light colored above for hopwoodi and too large for disturbans and are 

 placed here. They measure: Wing, 137.5 and 144.5 mm. 



This form was originally described as being darker above and below 

 than leucophaeus, whereas the reverse is the case. Since the type 

 may have been an immature specimen, a reexamination of it would 

 be desirable. 



This is probably the resident form in northern, eastern, and southern 

 Siam, hopwoodi being only an erratic winter visitor. I rather think 

 that the majority of the specimens recorded by de Schauensee *^ as 

 hopwoodi really belong to this form. The wing measurements given 

 are too small for hopwoodi. The records of the forms are so involved 

 that without the specimens they are founded upon it would only 

 lead to error to try to allocate them. 



This drongo ranges from central and southern Annam to Cochin- 

 china, southern Laos, Cambodia, and northern, eastern, and south- 

 eastern Siam. 



DICRURUS LEUCOGENIS LEUCOGENIS (Walden) 



Buchanga leucogenis Walden, Ann. Mag. Nat. Hist., scr. 4, vol. 5, p. 219, 1870 



(Nagasaki, Japan, error; China). 

 Buchanga leucogenys cerussata Bangs and Phillips, Bull. Mus. Comp. Zool., 



vol. 58, p. 302, 1914 (Ichang, Hupeh, China). 



One male and one female, Ban Nam Kien, Nan, April 18, 21, 1930; 

 one female. Ban Tarn Dam, near Sriracha, March 5, 1930; one 

 female, Sriracha, February 4, 1927; one male, Hupbon, November 3, 

 1931 ; two females, Kao Seming, Krat, October 11, 15, 1928; one male, 

 Kao Sabap, November 4, 1933. 



Dr. W. L. Abbott collected one female, Tanjong Badak, Tenas- 

 serim, March 1900. He gives the soft parts as: Iris red; bill and feet 

 black. 



The male from Hupbon and the male from Kao Sabap are light 

 colored like a male from Ichang and four males from Szechwanin 

 the United States National Museum. All the females are darker, 

 with the white facial area much restricted. The females examined 

 from China or elsewhere are dark like the Siamese specimens. The 

 female from Ban Tarn Dam, March 5, is molting from a darker into 

 a somewhat lighter plumage, but the new plumage is still a little 

 darker than the adult male. 



Bangs and Phillips named the light-colored form as cited above, 

 but I think there is not much doubt that Walden described the light- 



» Proc. Acad. Nat. Sci. Philadelphia, vol 86, p. 220, 1934. 



