I9I9'] Oriental Woodpeckers and Barbets. 185 



Count Gyklenstolpe named his birds from northern Siam 

 specimens, of whicli I have now seen a fair series, and I 

 cannot see any difference between these and normal Burmese 

 specimens. Average measurements of this Woodpecker do 

 not seem to decrease as one works south until practically 

 the latitude of Rangoon is reached, but from this point 

 there is a decided diminution which steadily becomes more 

 pronounced down peninsular Burma and Siam. It does not 

 appear desirable at present to make any further division 

 between peninsular and southern Burmese birds, and I 

 retain them all under Count Gyldenstolpe's name. 



Habitat. Chin and Kachin Hills, and the whole of north 

 and central Burma, north and central Siam, and peninsular 

 Burma and Siam, as far south as Moulmein. Northern 

 Shan birds approach the Yunnan form, whilst southern 

 Shan specimens cannot be distinguished from those of 

 Siam. 



The Chinese form of canus also appears to be divisible 

 into several subspecies, partly by measurement and partly 

 by coloration. 



The measurements of the fine Museum series of over 

 100 specimens are as follows : — 



Colour differences are as follows : — 



Birds from Foochow and Fokien, and presumably the 

 rest of south Ciiina, are much darker than those from the 

 north of the Yangtse river, thus forming a well-marked 

 division between (1 & 3) and (3 to 5); birds from Setchuan 



p2 



