A COLLECTION OF BIRD-SKINS FROM SIAM. 199 
2 2 Maprit, P. Siam, t-4. 1. 16. 
¢ Bangkok, 8. 3. 16. 
Siam birds seem to be quite typical. Young birds are much 
darker than adult ones, and have considerably less white—indeed, in 
the youngest birds it is hardly present at all. 
The present small series contains specimens of the darkest 
young birds, and the whitest adults. 
51. DickRURUS LEUCOPHAEUS DISTURBANS. 
Dicrurus leucophaeus disturbans, Baker, Noy, Zoo), 1918, vol, xxv. 
p. 293, 
2 Pak Jong, E. Siam, 2. 12. 15. 
The specific name for all the Drongos of the longicaudatus, 
cineraceus and nigrescens group must be leucophaeus of Vieillot. 
I have recently written a uote on this species in “ Novitates Zoo- 
logicae” (vol. xxv. p. 293, 1918), and have nothing to add to what | have 
there recorded. A large series from Siam is still a desideratum, in 
order to enable us to see to what extent this sub-species varies in 
depth of colouring. 
In Northern and Central Siam the form of Drongo met with 
will almost assuredly be Oates’ D. 1. nigrescens. 
52, CHAPTIA AENEA MALAYENSIS. 
Chaptia malayensis, A, Hay, Blyth, J. A, S. B. xv. p, 294 (1846). 
2 $ Hup Bon, S. E. Siam, 7-20. &. Ve. 
2 Maprit, P. Siam, 9. 1. 16. | 
As [have already explained in “ Novitates Zoologicae” (vide 
supra), I cannot separate the Siamese form from those of Burma, Malay 
Peninsula and Southern India, and all Mr. Herbert’s birds are quite 
typical of this sub-species. The Hainan birds are a much bigger race. 
53. ACROCEPHALUS ARUNDINACEUS ORIENTALIS. 
Salicaria turdina orientalis, Temm. and Schleg. Faun. Jap. Aves, 
p. 50 (1850). 
2 2 Samkok, C. Siam, 16. 3. 16. 
54. ORTHOTOMUS SUTORIUS MACULICOLLIS, 
Orthotomus maculicollis, Moore, P. Z. 8. 1854. p. 309. 
¢ Samkok, C. Siam, 22. 6. 15. 
VOL. ILI,.NO. IIT, 1919. 
