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



viduals, would appear to be a real resident throughout southern 

 Indo-Cliina. 



i What is Bunchanga leucophaea disturbans (Baker, Nov. 



Zool. xxv, 1918, p. 293), a small drongo distinctly darker than the 

 Javan leucophaea, with a habitat from Amherst (typical locality) 

 down into the Malay Peninsula and found also at Pak Jong, E. 

 Siam ? 



Two dark races have already been described from ths, 

 area : — nigrescens Oates, from Rangoon ; and intermedia Blythi 

 from Penang (not, fide Baker, from the extreme south of the 

 Peninsula), with a wing of 127 and tail of 130 mm. in the type. 



We have nine examples of the latter which were taken in 

 Kedah and Junk Seylon during November and January and deter- 

 mined by actual comparison with Blyth's type lent by the Indian 

 Museum. They measure : — 



Wings, 123 to 134; average 128 mm. 



Tails 124 to 138; average 133 mm. 



While the measurements of disturbans are: — 

 Wings 120 to 136 ; average 127 mm. 

 Tails 122 to 151 ; average 131 mm. 



Baker gives the habitat of nigrescens (a very dark bird with 

 which, however, he associates pale individuals*) as from about 

 Bhamo to Bangkok, thus establishing an overlap with disturbans 

 throughout the country between Amherst and Bangkok. (Dates 

 considered Junk Seylon birds to be the same as those of Rangoon 

 and, as shown above, the former are intermedia, : therefore nigres- 

 cens (fide Oates) can scarcely be a very different bird from the 

 latter. 



I have always regarded Oates' birds from Rangoon and the 

 neighbourhood as practically the same as intermedia, though 

 possibly a slightly larger race, and there seems hardly room for a 

 third dark bird between Penang and Rangoon, especially when it is 



* I am not sufficiently acquainted with northern birds to have a 

 deGnite opinion, but I question Mr. Baker's allocation of pale birds to 

 nigrescens. 



JOURN. NAT. HIST. SOC. SIAM. 



