414 BULLETIN 17 2, UNITED STATES NATIONAL MUSEUM 



Schauensee^^ had previously recorded it from Doi Sutep, 4,500 feet, 

 December 9. 



It breeds in the mountains of western China and migrates to nortli- 

 ern Siam, Tonkin, Annam, and Laos to winter. 



OREOCINCLA HORSFIELDI AFFINIS Richmond 



Oreocinda horsfieldi afTntis Richmond, Proc. Biol. Sec. "Washington, vol. 15, p. 



158, 1902 (Kao Nok Ram, 3,000 feet, Trang, Peninstilar Siam). 

 Turdus aureus angustirostris Gyldenstolpe, Orn. Monatsb., 1916, p. 28 (Koon 



Tan, northern Siam). 



One male, Doi Nangka, November 3, 1900. 



Dr. W. L. Abbott collected the type (a male), Kao Nok Ram, 3,000 

 feet, Trang, January 13, 1899. 



Dr. Smith's specimen agrees almost perfectly with the type of 

 affinis, except that the belly seems to be more extensively wliite. It 

 measures: Wing, 139; culmen, 23 mm. The type of affinis: Wing, 

 143 ; culmen, 22 mm. 



0. horsfieldi is a smaller bird than aurea, darker on the back, with 

 the light markings on the inner webs of the outer tail feathers much 

 reduced, especially on the outer feather. Five Chinese males of 

 aurea have wings ranging from 164 to 173 mm. Both species have 

 14 rectrices. Three males and two females of 0. h. horsfieldi of Java 

 have culmens measuring from 26 to 28 (26.8) mm. This is consider- 

 ably more than in the two males of affinis listed above, and for this 

 reason I am keeping the two races separate. 



The United States National Museum contains a female collected 

 by C. Boden Kloss on the Langbian Peaks, southern Annam, April 26. 

 It is somewhat darker than the type of affinis above. It measures: 

 Wing, 149; culmen, 22.5 mm. The light markings on the outer tail 

 feathers are almost obsolete. I can count only 12 rectrices, but it 

 may have lost a pair. It was originally identified as 0. aureus angus- 

 tirostris, but it undoubtedly belongs to a form of horsfieldi. This led 

 me to believe that angustirostris and affinis are one and the same. 

 Count Gyldenstolpe compares the former with horsfieldi, of which it 

 is a form, but affinis is an earlier name. 



Robinson and Kloss ^^ say they have specimens from Kao Ram and 

 Kao Luang, 1,000-2,000 feet in Nakon Sritamarat that they regard 

 as the same as the Javanese bird. 



The range of 0. h. affinis is hard to determine. 0. h. horsfieldi may 

 occur in the Malay States and 0. h. affinis north of them in Peninsular 

 Siam to the mountains of northern Siam and eastward to southeastern 

 Annam, 



M Proc. Acad. Nat. Sci. Philadelphia, vol. 81, p. 543, 1930. 

 •• Journ. Nat. Hist. Soc. Siam, vol. 5, p. 30?, 1924. 



