THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 383 



Arachnothera longirostris longirostris, M., p. 414 (Tung Song and 

 Patiyu) . 



c? . Tapli, Pakchan Estuary, P. Siam [No. 4517]. 



2 c? , 2 . Tasan, Chumporn, P. Siam, 13-27 March 1919 [Nos. 

 4550, 4719, 4913]. 



Male. " Iris reddish brown ; upper mandible black, lower and 

 feet slate." Female. "Iris hazel, bill slate, upper mandible darker ; feet 

 pale slate". 



Total length 6, 159,157, — ; $,148; wing d , 67, 66,64; 

 9,58; tail c?,45, 45, 44; 2 , 45 ; tarsus J, 16, 17,16; $,13.5; 

 bill from gape d , 34, 38.5, 34 ; $ , 34.5 mm. 



The bills of two males from Trang are 38 and 37.5, of a male 

 from Ghirbi 35, and of a female from Bandon 36 mm. ; while the 

 corresponding wing measurements are 66, 64, 65, 60 ; so that on this 

 small series females would, as stated by Hume (Stray Feath. vi, 1878, 

 p. 175), appear to be smaller. 



The comparison of eight specimens from Peninsular Siam, 

 with fourteen others from Selangor, reveals no constant differences in 

 colour ; some specimens are more bronzy above and others greener, 

 but the variations occur in both series and are probably dependent 

 on wear of the plumage. The throat of nine specimens is greyer 

 than others, and more sliarply defined from the lower plumage, which 

 varies in the strength of the yellow tint, but there are again age 

 characters occurring in both series. 



The dimensions of the Selangor series, 12 males measured 

 dry, are wing, 62-70 (av. 67.7) ; bill from gape, 36-43 (av. 40 mm.) : 

 we are unaccountably deficient in females, but one measures, wing 

 62, bill from gape, 36 mm. 



The following names have been applied to races of this 

 group : — 



!• Gyldenstolpe, Kungl. Sv. Vet. Akad. Handl. M. Baker, Journ. N. H. Soc. Siam, iii, 1919. 

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



J. Eobinson, Journ. F. M. S. Miis. vii, 1917. M. I. Baker, op, cit., iv, 1920 (third part). 



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

 L. Eobinson and Klcss, Journ. N. H. Soc. Siam, 



iii, 1910. 



VOL. V, NO. 3, 1924. 



