A COLLECTION OF BIRD-SKINS FROM SIAM. 413 
I cannot define any distinction between the birds of this 
series and others from 8. India, Assam, Bengal and Upper Burma. 
This Pipit is remarkably constant in size throughout the 
whole of its range; the usual laws creating small races in the south 
and large ones in the north do not seem to operate in respect to this 
species nor can I trace any deepening of colour in humid countries 
with a corresponding loss of colour in dry and desert areas. 
126. MIRAFRA CANTILLANS WILLIAMSONI. 
Baker, Bull. B. O. C. No. cex, p. 9. (1915). 
5 ¢ Bangkok, 16.6 to 11.7.15. 
2 Sansep, Bangkok, 3.7.15. 
$ Samkok, C. Siam, 30.8.15. 
The above 7 birds completely bear out my diagnosis of the 
sub-species made by me in the Bulletin, the wings of the series 
varying between 66 and 73 mm, There is, however, another 
Mirifra cantillans specimen obtained by Mr. Herbert on the 20th 
June at Samkok, which is very different to the rest. It isa huge 
bird with a wing of 82 mm. and though very similar in general 
appearance t) the others, is unusually richly coloured, and has very 
red wings: For the present I cannot place this specimen. It is 
possibly only an aberrant specimen of williamsoni, for we cannot 
have two breeding races in the same area, but similar specimens 
should be carefully watched for and recorded. 
. 127. MIRAFRA ASSAMICA MARION. 
Baker, Bull. B. O. C. No. cexi, p. 34 (1915). 
g Chan Teuk, E. Siam, 13.7.15. 
$ & Krabin, C. Siam, 4.11.15. 
The colouration of the above three specimens agrees well 
with those described in the Bulletin, but the wings measure 73, 77 
and 78 min. respectively, making the average, for the five, 75.5 mm. 
The smallest assumica I have measured has a wing of 82 mm., and 
they run up to over 89.0 mm. 
128. ALAUDA GULGULA SALA. 
Alauda sala, Swinh. Ibis, p. 354 (1870). 
? Sansep, Bangkok, 3.7.15. 
VOL. II, NO. 4, 1919. 
