BIRDS FROM SIAM AND THE MALAY PENINSULA 295 



ORIOLUS CHINENSIS TENUIROSTRIS BIyth 



Oriolus tenuirosiris Blyth, Journ. Asiat. Soc. Bengal, vol. 15, p. 48, 184G (Central 

 India). 



One male, Khun Tan Mountains, 2,000 feet, November 23, 1928; 

 one female, Doi Nangka, November 17, 1930. 



The above two specimens have been compared with a good series 

 from the Likiang Mountains, Yunnan, and the latter seem to have on 

 the average somewhat longer bills, but this might not hold in a larger 

 Siamese series. The culmens in the two Siamese specimens measure: 

 30.5 mm (male); 31 mm (female). The culmens of six males from 

 Yunnan measure: 31.5, 32, 32.5, 31, 32, 32.5 mm. The culmens in 

 two females from Yunnan: 31.5, 31 mm. 



This race differs from 0. c. dlrffusus in having the back greenish, the 

 black nuchal band narrower, and the bill longer and slenderer. 



In Siam it has been taken commonly only in the mountains of the 

 north. It was first recorded by Williamson ^* from Doi Nga Chang, 

 Lampang. On Doi Sutep it has been taken by several collectors, 

 Deignan stating that it occurs there from 3,000 feet to the summit 

 from October to February ;^^ this would seem to indicate that it was 

 only a winter visitor. Baker ^^ has recorded it from Krabin and 

 Klong Bang Lai, central Siam, and apparently these are the only 

 records for this part of the coimtry. Lowe ^^ took it 28 miles east 

 of Umpang; de Schauensee^^ at Khun Tan, Chiengmai, and Chiengdao. 



The form breeds in the foothills of the Himalayas from Nepal to 

 Assam, Burma, and Yunnan, and migrates south to Cachar, Siam, 

 and Indo-China to winter. 



ORIOLUS XANTHORNUS XANTHORNUS Linnaeus 



Oriolus xanthornus Linnaeus, Systema naturae, ed. 10, p. 108, 1758 (America 



error; Bengal). 

 Oriolus luteolus thaicaous Hartert, Bull. Brit. Orn. Club, vol. 38, p. 63, 1918 



(Koh Lak, Southwestern Siam). 



One male, Kao Luang, Nakon Sritamarat, October 10, 1930; one 

 male, Koh Lak, June 23, 1933; 11 males (three immature), Pran, 

 May 26, 29, 1928, April 2-4, 1931 ; three males, Sam Roi Yot, Novem- 

 ber 7, 8, 1932; four males (two immature) and one female, Muang 

 Kanburi, April 7-10, September 10, 1928; one male, Kanburi, Sep- 

 tember 19, 1929; one male, Kwe Noi, Kanburi, September 24, 1929; 

 one male, Wang Kicn, Kanburi, March 12, 1934; one immature male, 

 Vichienburi, February 2G, 1934; three males (one immature) and one 

 female, Sakeo, near Krabin, May 2-7, 1928; one male, Nong Mong, 

 Muang Krabin, August 29, 1925; one male, Sriracha, November 5, 



•< Journ. Nat. Hist. Soc. Siam, vol. 3, p. 21, 1918. 



«» Jouru. Siam Soc. Nat. Hist. Suppl.. vol. 8, p. 150, 1931. 



»• Journ. Nat. Hist. Soc. Siam, vol. 3, p. 208, 1919. 



•' Ihis, 1933, p. 277. 



" Proc. Acad. Nat. Sel. Philadelphia, vol. 86, p. 232, 1934. 



