134 BULLETIN 17 2, TNITED STATES NATIONAL MUSEUM 



Siam really belong to malayana. The only males of the form ex- 

 amined by me from farther south are a specimen from Java and one 

 from Pulo Babi, west of Sumatra. Both have a steely-blue sheen 

 to the upperparts, especially the tail, that cannot be matched by 

 any of the specimens from Peninsular Siam or Siam proper. The bill 

 also seems to be larger. The culmen of the Java male measures 

 34 mm; that from Pulo Babi, 35.5 mm. Seven males from the 

 Malay Peninsula (Trang, 5; Straits of Malacca, 2) have culmens of 

 30-34 (32.3) mm; five males from Siam proper, 27-34 (30.2) mm. 

 There seems to be a gradual decrease in the size of the bill from south 

 to north. 



The female from Domel Island is quite different from the three 

 females from Siam listed above. The upperparts, wings, and tail 

 are spotted and barred with white; the streaks on the pileum only 

 light buffy; below the streaks or bars are white. The three females 

 from Siam are spotted or barred with ochraceous-ta\vny, especially 

 the tail; only a few scattered spots on the mantle being white. Below 

 they are warm buff. 



In southern China and Indo-China a smaller race, Eudynamys 

 scolopacea chinensis Cabanis and Heine, occurs. The only females 

 I have seen of this form are black and white like the female from 

 Domel Island. Some of the small-billed specimens from Siam may 

 really belong to the Chinese race. La Touche^^ says that it is only 

 a summer resident in southeastern China and consequently must go 

 south in winter. The material at my command is not sufficient to 

 settle the question at present, and I am following previous authors in 

 recognizing only one race in Siam. 



Robinson and Kloss " say that it is a migratory bird in the Peninsula 

 and Robinson ^^ confirms this statement. 



Some form of tliis koel has been recorded from nearly all over 

 Siam proper and Peninsular Siam into the Malay States. Deignan" 

 found it at Chiengmai in March and May. Herbert^" fo\md it 

 breeding in central Siam, parasitic on the crow. As a rule only one 

 egg is found in a nest, but sometimes three or four occur. 



ZANCLOSTOMUS JAVANICUS PALLIDUS Robinson and Kloss 



Zanclostomus javanicus pallidus Robinson and Kloss, Journ. Federated Malay- 

 States Mus., vol. 10, pt. 3, p. 203, 1921 (Kehdah Peak, 2,500-3,500 feet, 

 Malay Peninsula). 



Two females, Kao Soi Dao, Trang, December 21 and 27, 1933; 

 one unsexed, Kao Chong, Trang, September 1, 1933; one female, 

 Waterfall, Trang, August 25, 1933. 



>• A liandbook of the birds of eastern China, vol. 2, pt. 2, p. 55, 1931. 



Mlbl-s. 1911, p. 41. 



»• Journ. Federated Malay States Mus.. vol. 7, p. 160, 1917. 



«• Journ. Siam Soc. Nat. Hist. Suppl., vol. 8, p. ICO, 1931. 



"Journ. Nat. Hist. Soc. Siam, vol. 6, p. 304, 1924. 



