BIRDS FROM SIAM AND THE MALAY PENINSULA 215 



PICUS ERYTHROPYGIUS ERYTHROPYGIUS (Elliot) 



Gecinus erythropygius Elliott, Nouv. Arch. Mus. Paris, vol. 1., Bull., p. 76, pi. 3, 

 fig. 1, 1865 (Cochinchina) . 



One male and one female, Udon, March 19, 1929; one female, Sakon 

 Nakon, March 11, 1929, one male. Ban Den Miiang, February 25, 

 1929; one female, Pak Chong, December 21, 1926; one female. Pang 

 Sok, August 15, 1926; one female, Nong Mong, Muang Krabin, 

 August 30, 1925; three males and one female, Chantuk, June 13-16, 

 1934. 



The four specunens from Chantuk are all bhds of the year with dark 

 bills at the base, but not so dark as in nigrigenis; the thi'ee males have 

 the throats and sides of neck washed with orange. One male (no. 

 313262) has a white postocular streak; the other males have none. 

 Three (out of five) females have a white postocular streak. 



This form is easily distinguished from the next (nigrigenis) by its 

 horn-colored bill. It ranges from southern Annam and Cochinchina 

 to Cambodia, lower Laos, and eastern and southeastern Siam. 



Kloss ^^ records it from Lat Bua Kao ; Gyldenstolpe ^^ from Sakerat. 



PICUS ERYTHROPYGIUS NIGRIGENIS (Hume) 



Gecinus nigrigenis Hume, Stray Feathers, vol. 2, p. 444, 1874 (Tenasserim). 



One female, Doi Angka (lower slopes), December 9, 1928; one male, 

 Doi Phra Chao, August 5, 1934; one male and one female. Ban Nam 

 Kien, Nan, April 19, 21, 1930; one female, Muang Pai, December 27, 

 1932; one male and one female, Mekhan, February 7, 8, 1932; one 

 male and one female, Huey Salob, January 3, 1933; one male, Mae 

 Hong Sorn, January 5, 1933; one male, Khonka Valley, January 19, 

 1933; one female, Mesarieng, January 21, 1933; one female, Wang 

 Kien, March 13, 1934; four males and three females, Muang Kanburi, 

 April 10-14, and September 10, 1928; two males and one female. Bo 

 Ploi, Kanburi, September 26, 1929. 



The red crown patch in the male varies from quite restricted in 

 some specimens to one (no. 324155, Bo Ploi, Kanburi, September 26) 

 in which the whole pileum, except the forehead, is red. Judged by 

 analogy, the latter is a bird of the year, though it appears to be adult. 

 In none of the series, except one female, is there a light postocular 

 streak. In several of the males the outer tail feather has a grayish 

 spot at the tip of varying extent on the underside. 



This form is easily distinguished from erythropygius by its entirely 

 black bill. 



The form ranges from Karenni and Tounghoo, Burma, to northern, 

 western, and southern Siam. It is a common bird in northern and 



'« Ibis, 1918, p. 102. 



» Kungl. Svenska Vet.-Akad Handl., vol. 50, no. 8, p. 47, 1913. 



