562 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
T= 54 mm; C= 10 mm. — ¢ juv. Koon Tan 1914. W = 67,5 mm; T= 52 mm; C = 10 mm. — 
@ juv. Chieng Hai 1/s 1914. L—= 134 mm.; W = 66 mm.; T= 54 mm; C = 10,5 mm. — @ juv. Koon 
Tan 1914. W = 65 mm.; T = 54 mm.; C = 9,3 mm. — Irides: black. Bill: black. Legs: black. 
In his »Review of the Forms of Pratincola caprata. L.» STRESEMANN has shown 
that the race inhabiting the Indian Peninsula (north to the Himalayas) Burma and Te- 
nasserim ought to be separated from typical P. c. caprata LINN., on account of their 
larger size and their having much slender bills. 
This race, P. c. bicolor SyKxs, differ from its nearest ally P. c. rossorum Hart. in 
having the white colour of the underparts of the body only confined to the vent, while 
in P. c. rossorum almost the whole abdomen is white. 
The young females of P. c. bicolor in their first plumage are dark brown above, 
the feathers of the head and nape with small ferruginous apical spots, those on the mantle 
larger; rump and upper tail-coverts ferruginous; chin pale earty brown; throat and 
breast like the mantle but the ferruginous spots more closely set; the rest of the under- 
parts and under tail-coverts pale ferruginous brown; rectrices blackish; secondaries 
dusky blackish edged and tipped with ferruginous. 
The young male resembles the immature female but has the upper parts of the body 
blackish brown instead of dark brown. The white wing spot is very well-marked. 
89. Oreicola ferrea harringtoni. Harr. — Harrington’s Dark-Grey Bush-Chat. 
Oreicola ferrea: Gyldenstolpe UI p. 170. 
HarrTertT has separated (Végel der Paléarktischen Fauna Band I p. 711) the Bush 
Chat inhabiting Moupin, Szeschuan, Fokien and Burma from the typical Oreicola ferrea 
Gray. on account of its having a much shorter tail. He gives the tail as measuring 
from 57—61,5 mm. in the Burmese race, against 63—68 mm. in the Himalayan race. 
The tail of the single specimen (2) I obtained during my journey measures 58,5 mm. 
and on account of this I have referred the Siamese bird to O. ferrea harringtoni. The 
length of the tail, however, seems to me to be a very vague character for creating a subspe- 
cies but HarTERT says that the eggs of O. ferrea harringtoni are different and in my speci- 
men the wing is even shorter than recorded by HARTERT, only measuring 61,3 mm. The 
greyish supercilium is very well marked and the upper tail-coverts are rusty brown. 
The specimen was shot at Koon Tan in Northern Siam by Mr. Eisenhofers native 
collector. 
Fam. Crateropodide. 
90. Pomatorhinus hypoleucus tickelli. Buyts. — Tickell’s Scimitar Babbler. 
Pomatorhinus tickelli: Gyldenstolpe III p. 165. 
Koon Tan 7/p 1914. L = 253 mm.; W = 102 mm.; T = 102 mm.; C = 36 mm. — @ Koon Tan 
93/9 1914. L—= 260 mm; W = 99,8 mm; T= 111 mm; C = 38 mm. — ¢ Koon Tan %9/y 1914. L = 
245 mm.; W = 108 mm.; T = 108 mm.; C = 38 mm. — ¢ Koon Tan °/o 1914. L = 265 mm; W=110 
mm.; T = 112 mm.; C = 41 mm. — Irides: reddish brown. Bill: whitish grey. Legs: plumbeous. 
