A COLLECTION OF BIRD-SKINS FROM SIAM. 439 
expect to find the smaller race P. s. senwstws which ranges from 
Borneo to Central Tenasserim. The wing in this race averages only 
105. 7 mm. as against over 122 mm. in typical sonneratt. 
206. CHRYSOCOCCYX MACULATUS MACULATUS. 
Trogon maculatus, Gmelin, Syst. Nat. i, p. 404 (1788). 
2 Samray, Bangkok, 16.12.15. 
This is a very pale bird with the sheen on the back plumage 
light and less green than usual. More material is required to enable 
one to work out the geographical races of this beautiful little 
Cuckoo, but two other Siamese birds in the British Museum collect- 
ion agree fairly well with it. 
207. SURNICULUS LUGUBRIS. 
Cuculus lugubris, Horsf. Trans. Linn. Soc. xiii, p. 179 (1821). Java. 
2 Klong Wang Hip, P. Siam, 30.9.15. 
3 Krabin, C. Siam, 9.11.15. 
S Pak Jong, E. Siam, 30.11.15. 
This Cuckoo will require division into geographical races on 
two main grounds; comparative length of tail and wing formula. 
In the Indian and Malayan race the third primary is generally much 
longer than the fourth, and the first primary is comparatively large ; 
in the Palawan birds the third and fourth primaries are practically 
equal, and the first primary is very small. Ceylon specimens have 
the fourth quill longest or subequal, and the first primary large. 
Palawan birds also have very short tails, and Ceylon birds 
very long ones. 
208. KUDYNAMIS HONERATA MALAYANA. 
Eudynamis malayana, Cab. and Heine, Mus. Hein. iv, p. 52 (1862). 
2d 2 Krabm, C. Siam, 31.10 to 3.11,15. 
The wing measurements of these birds are males 203 and 209 
mim., and female 215 mm. The male shot on the 3rd has numerous 
white bars on the wings and tail. 
209. RHOPODYTES TRISTIS LONGICAUDATUS. 
Phenicopheus longicaudatus, Blyth, J. A. 8S. B. x, p. 923 (1841), 
Moulmein. 
VOL. II, NO. 4, 1919. 
