52 MR. C. BODEN KLOSS'S FURTHER NOTES ON 



(0. /. jiaviventris) range between 87 and 94 mm. and that it has a 

 longer crest ; the Malayan and Indo-Chinese bird is therefore quite 

 a recognisable subspecies. 



Five examples of a Cuckoo-Shrike from Nong Kae, SW. 

 Siam,* belonging to Mr. Williamson, are all Lalage polioptera, and a 

 female from Bandon, Peninsular Siam, is either L. fimbriata 

 neglecta or intermediate between that race and L. f. culminata. 

 Bandon is in a transition zone between the two forms and it is not 

 easy to determine to which a solitary banded specimen should be 

 referred. 



A series of ten examples of Chalcoparia singalensis -• 

 koratensis from Bangkok, N., E. and SE. Siam (Sriracha and Sata- 

 hip), in their more intensely yellow abdomens extending farther 

 upwards and meeting more abruptly the rufous of the throats, 

 beautifully illustrate the difference between themselves and C. s. 

 singalensis in which the bellies are duller, while the rufous extends 

 farther down the breast and ends indefinitely. 



Mr. Baker writes (Journ. N. H. S. Siam, iii, p. 415) that he 

 has compared 25 Siamese birds with over 100 specimens from more 

 northern countries and can detect no differences of sub-specific 

 value. I have no doubt that this is so and it goes to show that all 

 northern birds are G. s. koratensis. Baker has completely misap- 

 prehended the gist of the matter : singalensis is not of the north 

 but of the south, where Malacca has been selected as its type- 

 locality, and it is because of the differences that exist between East 

 Siamese birds and those of the Malay States that koratensis is valid 

 as a good subspecies. 



Of course if you compare things which are the same with 

 one another you don't find the differences which are shown by 

 comparison with them of things which are somethiug else : if you 

 compare koratensis with koratensis you naturally won't sec the 

 differences which separate koratensis from singalensis. 



It is more or less as above that Baker arrives at the conclu- 

 sion (torn, cit., p. 423 and Ibis, 1919, p. 192) that Chrysophlegma 



* A bout 50 miles north of Koh Lak. 



JOU11N. NAT. HIST. SOC. SIAM. 



