THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 303 



431. Herpornis xantholeuca interposita Hartert. 



Herpornis xantholeAica interposita, Hartert, Bull. Brit. Ovn. Club 

 xxxviii, 1917, p. 20 (Upper Perak ; Perils; Tenasserim). 



Herpornis xantholeuca, A., p. 374 (Tavoy to Bankasoon) ; 0. i, p. 151 

 (Tenasserim and Tongka) ; E., p. 80 (Patani) ; F., p. 63 (Lang- 

 kawi) ; H., p. 107 (Khao Nawng, Bandon) ; I., p. 62 (Koh Lak) ; 

 M., p. 190 (Tung Song). 



Erpornis xantholeuca xantholeuca, M. 2, p. 325 (partim : S. Tenas- 

 serim ; Siam ; N. Malay Peninsula). 



2. Renong River, P. Siam, 21 Feb. 1919 [No. 4143.] 



c? 8, $. Tasan, Clmmporn, R Siam, 17-19 March 1919 [Nos. 

 4654, 4660, 4693-4]. 



3 d , 4 $. Hat Sanuk, S. VV. Siam, 14-17 April, 1919 [Nos. 

 5283, 5305-7, 5335, 5363-4]. 



" Iris dark brown, grey or whitish ; bill horny, darker on cul- 

 men, yellowish at gape ; feet yellowish pink." 



Total length S , 127, 115, 122, 118; $, 127, 120, 122, 120, 

 120, 118, 115, 122 ; wing s , 70, 60, 68, 61 ; $ , 68, 65, 65, 62, 65, 65, 

 62, 66 : tail d , 53, 47, 48, 47 ; 5 , 50, 48, 49, 46, 49, 50, 47, 48 ; 

 tarsus c? , 18, 18, 17, 18 ; $ , 16, 18, 17, 18, 17.5, 17, 17, 18 ; bill from 

 gape J , 16, 16, 15.5, 16 ; $ . 16, 16.5, 16, 16, 14, 16, 15.5, 16 mm. 



We have examples also from Khao Luang, 2,000-3,000 feet, 

 Nakorn Sritamarat, P. Siam. 



432. Pteruthius flaviscapis aeralatus Tickell. 



Pteruthius aeralatus, Tickell, Joiix'n. Asiat. Sec. Bengal, xxiv, 1855, 

 p. 267 (Tenasserim) ; H., p. 107 (Khao Nawng, Bandon). 



Pteruthius aeralatus aeralatiis, M. 2, p. 333 (Tenasserim, North 

 Malay Peninsula). 



The Khao Nawng birds and specimens from Khao Luang, 



4,500-5,800 ft. Nakorn Sritamarat, P. Siam, agree well with others 



from Khoon Tan in the North of Siam. Birds from the Perak and 



Selangor Hills are not quite typical, and some specimens sliow an 



approach to the Sumatran form P. /. earner anoi Salvad. 



1. Gyldenstolpe, Kungl. Sv. Vet. Akad. Handl. M. Baker, Joura. N. H. Soo. Siam, iii, 1919. 



56, No. 2, 1916. (first and second parts). 



J. Robinson, .Tourn. F. M. S. Mus. vii, 1917. W. I. Baker, op, cit., iv. 1920 (third part). 



K. Kloss, Ibis, 1918. M. 2. Baker, Fauna Brit. Ind., Birds, i, 1922. 

 L. Robinson and Kloss, .Joiirn. N. H. Soe. Siam, 



iii, 1919. 



VOL, V, NO. 3, 1924. 



