KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 56. N:0 2. 77 
In colouration it very much resembles C. tickellie. BiyTH but is distinguished by 
a smaller size and by having the abdomen, under tail-coverts, axillaries and under 
wing-coverts pure white. 
The female specimen I obtained agrees exactly with the description given by Ro- 
BINSON and Ktoss (Ibis 1911 p. 52). 
140. Cyornis banyumas tickellie. Buyru. — Tickell’s Blue Flycatcher. 
Cyornis tickelli@: Gyldenstolpe I p. 37. 
Cyornis banyumas tickelli: Robinson HI p. 743. 
o Koon Tan 1%) 1914. L = 137 mm; W = 73 mm.; T = 68 mm.; 0 = 12 mm. — & Koon Tan 
18/) 1914. L == 129 mm.; W = 70 mm.; T = 64 mm.; C = 12 mm. — Irides: brown. Bill: black. Legs: 
plumbeous grey. 
Two male specimens of Tickell’s Blue Flycatcher were obtained among the Hills 
near Koon Tan. : 
As I have already stated about C. swmatrensis SHARPE., which this species closely 
resembles, it is distinguished by its greater size. Both the specimens obtained are in 
moult and have a very abraded plumage. 
141. Cyornis pallidipes. Jerp. — The White-bellied Blue Flycatcher. 
Cyornis pallidipes hainana:; Robinson III p. 743. 
do Koon Tan, May 1914. W = 69 mm.; T = 63 mm.; C = 10,3 mm.; Tarsus = 16 mm. — Pak 
Koh %/, 1914. I, = 132 mm.; W = 67 mm.; T = 61,5 mm.; C= 11 mm.; Tarsus = 16 mm. — Irides: 
black. Bill: black. Legs: pale brown. 
Two male specimens of this beautiful Flycatcher were obtained in Northern Siam. 
BopEN Kross collected one male at Klong Menao in South Eastern Siam during his re- 
cent journey and this specimen has been referred by Roprnson to Cyornis pallidipes 
hainana GRANT, originally described from Hainan (Proc. Zool. Soc. 1900 p. 480). 
As compared with the measurements given by GRANT (tom. cit.) my specimens 
are practically intermediate between the Hainan form and typical Cyornis pallidipes 
JERD. from Southern India. 
The Siamese specimens show a close relation to the Hainan form, as is also the case 
with several other species. This close relationship seems to indicate that a centre of distri- 
bution was situated somewhere east of the Salween river thus including South Eastern 
China, Hainan, Annam, Tonkin, Cambodia, Cochin China, Siam, Yunnan and parts of 
Burma. From this centre the different forms have then spread out in a western 
direction, while the Himalayan forms made their way southwards. 
The specimens of Cyornis pallidipes obtained by me are neither typical Cyornis 
pallidipes JeERD. nor Cyornis pallidipes hainana GRANT. and as the difference between 
these two forms are very slight I think it wisest not to give a subspecific name to the 
Siamese form until more material has been obtained. 
