A COLLECTION OF BIRD-SKINS FROM SIAM. 419 
male, but already shews signs of acquiring the black pectoral band. 
148. CoRYDON SUMATRANUS. 
Coracias sumatranus, Ratt. Trans. Linn. Soc. xiii, p. 303 (1822 
»?P . 
3 2 Hup Bon, S. E. Siam, 25.7.15. 
149. CYMBORHYNCHUS MACRORHYNCHUS MALACCENSIS. 
Cymborhynchus malaccensis, Salvad. Att. R. Ac. Se. ix, p. 425 
(1874). 
3 Chan Teuk, E. Siam, 13.8.15. 
3 6 2 Klong Wang Hip, P. Siam, 5-8.10.15. 
2 5 Klong Bang Lai, P. Siam, 26.1.16. 
Whilst comparing this series with others from the Peninsula 
and from Borneo and Sumatra, I also compared birds from the two 
latter islands with one another, and in the result am unable to 
distinguish between them. As a rule the Sumatran birds have a 
little more white on the tail feathers, but this distinction does not 
always hold good. In size the two birds are the same, Sumatran 
birds having the wings between 95 and 162 mm., and Bornean be- 
tween 95 and 101 mm. 
150. SERILOPHUS LUNATUS LUNATUS, 
Serilophus lunatus, Swainson, Class B, ii, p. 263. 
2 Hup Bon, 8. E. Siam, 27.7.15. 
3 2 2 Tung Song, P. Siam, 16-20.9.15. 
2 5 Klong Bang Lai, P. Siam, 19-29.1.16. g 
In this series the variation in the pretty white tipping to 
the feathers on the side of the neck of the female varies very 
greatly in extent; in one it is more strongly developed than in the 
majority of S. J. rubropygius, in a second it is much the same as in 
normal birds of that race, but in the third it is obsolete. 
151. CALYPTOMENA VIRIDIS. 
Calyptomena viridis, Raft. Trans. Linn. Soc. xiii, p. 295. (1822 
¢ o Tung Song, P Siam, 21-22.10.15. 
252. PicUS CANUS HESSEI. 
Gecinus occipitalis hessei, Gyldenstolpe, Orn. Monatsb. xxiv, p. 28 
(1916). 
¢ Krabin, C, Siam, 12.11.15. 
VOL. III, NO. 4, 1919. 
