A COLLECTION OF BIRD-SKINS FROM SIAM. 421 
Perhaps even more material is necessiry before we can de- 
cide the status of ¢isenhoferi, and if accepted, how far south its 
area should be held to extend.* 
For the present I retain all the Siamese birds under the 
name vittatws. ; 
154. Picus VITTATUS VIRIDANUS. 
Picus viridanus, Blyth, J.A.S B. xii, p. 1000 (1843). 
2 ¢ Maprit, C. Siam, 30.12.15. and 10.1.16, 
These are apparently the first specimens of true viridanus 
received from Siam in the British Museum, for I find that all those 
which have been labelled viridanws are nothing but vittatus. 
Herbert's birds are very fine specimens, the barring on the 
under-parts coming right up to the upper breast in stronger, better 
defined bars than in any of the Burmese skins in that collection. 
The wings of the two birds measure respectively 135 and 139 mm. 
As an examination of the material in the British Museum 
and elsewhere does not enable me to maintain Gyldenstolpe’s sub- 
species eisinhoferi, there appear to me to be only two sub-species, 
viz., @. v. viridanus, which is found throughout Burma, Chin Hills, 
Kachin Hills, south Shan States, north and central Siam, and 
possibly extreme west of Peninsular Siam and Burma. 
G. v. vitatus, which is found from Java, Malay States, east 
and west Peninsular Siam ani Burma, in South-Eastern Siam and 
as far north as Pak Jong ia eastern Siam, and thence again, if 
Gyldenstolpe is correct, in assigning his birds to the vittatus. rather 
than the viridanus group, well up into north central Siam and 
Cochin China. 
In a letter to me Mr. Herbert remarks on the fact not, I 
think, hitherto recorded, of the great part taken im incubation by 
the male birds of most species of Wood-pecker. 
_ * The following are the wing measurements of 14 birds in Mr. 
Williamsou’s collection :— 
4 birds from E. Siam, wing average 142 mm. 
3 ” ” U. ” ” ” 134 mm. 
foe Sy a Peat a 4 141 mm. 
4 2? 3? S. W, ” ”> 2? 135 mm. 
Average wing measurement of 14 birds= 138 mm. [Eds.] 
VOL. Ill, NO. 4, 1919. 
