204 BULLETIN 17 2, UNITED STATES NATIONAL MUSEUM 



This considerable series from the Malay Peninsula differs from 

 Sumatran birds only in having a somewhat lighter blue superciliary 

 and throat and smaller bill. It is not a well-marked race, however. 



Six males from Sumatra (2), Banka (3), and Billiton (1) measure: 

 Wing, 116-125 (120.2); tail, 63.5-73 (66.3); culmen, 37^0.5 (38.8) 

 mm. Ten males from the Malay Peninsula: Wing, 115-125 (120.6); 

 tail, 61.5-70 (66); culmen, 35-38.5 (36.6) mm. 



Chotorea rafflesii malayensis ranges from Singapore north through 

 Peninsular Siam to southern Tenasserim. The farthest north in Pen- 

 insular Siam at which it has been taken is supposed to be opposite 

 the island of Puket, but August Muller ^^ gives simply the Peninsula 

 of Malacca. Dr. Abbott's specimen from Tenasserim is evidently 

 the northernmost record to date. 



In Borneo a closely related form, Chotorea rafflesii borneensis, with 

 a still lighter blue throat and superciliary, occurs. C. r. rafflesii is con- 

 fined to Sumatra and Banka. 



CYANOPS ASIATICA DAVISONI (Hume) 



Magalaima davisoni Hume, Stray Feathers, vol. 5, p. 108, 1877 (Meetan, southern 

 Tenasserim) . 



Five males and three females, Khun Tan Mountains, 3,000-4,300 

 feet, November 21, 1928, May 9-16, 1933; three males and six females, 

 Khun Tan, 4,000 feet, October 17, 1929, August 27-29, 1930, February 

 15-March 3, 1932; two males and two females, Doi Hua Mot, August 

 19-29, 1934. 



In the majority of the above series the band across the vertex is 

 blue; in two males and three females, which I regard as interme- 

 diates, it is black with a strong blue tinge. The records of C. a. 

 asiatica from northern Siam are open to question, it seems to me. 



De Schauensee " records davisoni from Chiengrai and Chieng Sen, 

 and on his third expedition ^^ he collected additional specimens at 

 Chiengdao and at Khun Tan. The northern birds are regarded as 

 intermediate between this and the nominate form; Deignan'^ records 

 it from Doi Sutep, 2,500-4,000 feet; Chasen and Kloss ^° from the 

 Raheng District of western Siam. 



The form extends from Peninsular Burma through western and 

 northern Siam to Laos, Tonkin, and northern Annam. 



" Die Ornis Salanga, p. 74, 1882. 



"Proc. Acad. Nat. Sci. Philadelphia, vol. 81, p. 509, 1930. 

 '• Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 255, 1934. 

 "Joiirn. Siam Soc. Nat. Hist. Soc. Suppl., vol. 8, p. 158, 1931. 

 MJourn. Siam Soc. Nat. Hist. Soc. Suppl., vol. 7, p. 169, 1928. 



