18 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
The Indian Tree-pie is a very characteristic bird and is not easy to overlook especially 
on account of its syllabic note which makes its presence known at rather a far distance. 
Therefore I am perfectly sure that it does not occur in Northern Siam north of 
Lat. 18°. 
4. Crypsirhina varians. Lara. — The Black Racket-tailed Magpie. 
Crypsirhina varians: Grant p. 66; Williamson I p. 42; Williamson II p. 76; Gyldenstolpe I p. 19; Gylden- 
stolpe II; Gyldenstolpe III p. 164. 
Sf Koon Tan "/;2 1914. Length = 292 mm.; Wing = 114 mm.; Culmen = 19,5 mm.; Tail = 184 mm. 
— 9 Koh Lak ®/; 1915. Length = 296 mm.; Wing = 114 mm.; Culmen == 20 mm.; Tail = 189 mm. — 
© Chum Poo 2/5 1915. Length = 303 mm.; Wing = 111 mm.; Culmen = 19 mm.; Tail = 195 mm. — Iris: 
Pale blue. Bill: Black. Legs: Black. 
The Black Racket-tailed Magpie was rather common in brush-, secondary- and 
bamboo-jungles over the whole of Siam. Even as far south as at Koh Lak and its surro- 
undings it was far from being rare. 
The Siamese specimens are absolutely identical with those from Java, both as to 
size and colouring. 
5. Cissa chinensis. Bopp. — The Green Magpie. 
Cissa chinensis: Gyldenstolpe II; Gyldenstolpe III p. 164; Gairdner p. 148. 
JS Doi Par Sakeng 17/7 1914. L = 365 mm. W = 150 mm; T = 205 mm; C = 30 mm. — ¢ 
Koon Tan 24/, 1914. L = 358 mm.; W = 146 mm.; T = 211 mm.; C = 31 mm. — ¢ Koon Tan °/p 1914. 
L= 275 mm.; W = 150 mm.; C = 30 mm. — § Doi Par Sakeng “/; 1914. L= 356 mm.; W = 147 mm.; 
T = 211 mm; C = 29 mm. — & Koon Tan '/5 1914. L = 316 mm.; W = 137 mm.; T= 165 mm.; 
C = 27 mm. — Irides: Reddish brown. Bill: coral red. Legs: coral red. Ring round the eye: coral red. 
This beautiful Magpie was fairly common in the thick vegetation covering the lower 
hills of Northern Siam. As already stated by Davison it has much the same habits as 
the Laughing Thrushes of the genus Garrulaz, but I never found it together with these 
birds as stated by this same author. When observed it was always single sculking among 
the thick and thorny vegetation. I never heard it utter any notes, only when being 
wounded it uttered a hoarse, rather unpleasant call. 
The female specimen obtained at Koon Tan on the 15th of May 1914 has a some- 
what differing colouration from the other specimens collected and though its dimensions 
are smaller than the other birds, I think it is wisest not to separate it under a subspe- 
cific name. 
These Magpies are very variable and the colour of the plumage undergoes a con- 
siderable change after death. Still this specimen differs a great deal and I therefore give 
a full description of it. 
Adult female: General colour above greenish blue (in skin.); lores, feathers round 
the eye, ear-coverts and a broad band encircling the nape pure black; forehead yellowish 
green which colour even occupies the crown and the long crest feathers, though fading 
