62 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
In May 1914 a fine specimen, clearly belonging to this species, was obtained on one 
of the Koon Tan Hills. The bill is perfectly black which is the main point of difference 
between this species and the allied M. temmincki Vic., which also has been found among 
the mountains of Northern Siam. 
All members of the Genus Myiophoneus seem to migrate in some way during the 
winter months. 
107. Myiophoneus eugenei. Humes. — The Burmese Whistling-Thrush. 
Myiophoneus eugenti: Gyldenstolpe II; Gyldenstolpe III p. 165; Robinson III p. 750. 
do Koon Tan *4/5 1914. L= 355 mm.; W= 183 mm.; T= 144 mm.; C = 29 mm. — 1 ad. Koon 
Tan 1914. W =167 mm.; T == 130 mm.; C = 24 mm. — @ Koh Lak 4/12 1914. L = 303 mm.; W = 166 
mm.; T = 121 mm.; C= 25 mm. — Koon Tan 7/9 1914. L= 306 mm.; W = 167 mm.; T = 122 mm.; 
C = 26 mm. — Irides: brown. Bill: horny yellow. Legs: black. 
Distributed over the whole of Northern Siam and also obtained in the Siamese 
Malaya, though always rather rare and only seen in limited numbers. 
In the literature this species is generally recorded as an inhabitat of mountain 
torrents and rocky ravines among the hills. 
I found it in such places but also in secondary jungles in low-lying country and 
one specimen was seen, and another one procured, in a garden at Koh Lak. When 
observed it was jumping about on the ground in search of food. 
The males are much larger and more heavily built than the females. Especially 
their bills are very strong and robust. 
In the collections of the Royal Natural History Museum of Stockholm there is a 
specimen of a Myiophoneus obtained in Java 1880 according to the label. 
I have carefully examined this bird and have come to the conclusion that it 
must be a specimen of Myiophoneus crassirostris, ROBINSON, which has been obtained 
in the Northern Malay Peninsula and on the Langkawi and Teratau Islands. 
If the locality »Java» is correct, which however seems a little doubtful to me (it 
may be a trade skin brought over from the Malay Peninsula and incorporated in our 
Javan collection) it adds a new bird to the Javan fauna on the same time as it extends 
considerably the distributional area of this fine species. 
Fam. Sibiide. 
108. Herpornis xantholeuca. Hopes. — The White-bellied Herpornis. 
Herpornis xantholeuca: Robinson & Kloss p. 68; Grant 'p. 80; Robinson I p. 107. 
do Koon Tan 7/6 1914. L = 108 mm.; W = 64,7 mm.; T = 44 mm.; C=11,5 mm. — ¢ Koon Tan 
3/5 1914. L=123 mm.; W = 67,2 mm.; T= 46 mm. C=11 mm. — Q@ Koon Tan 18/9 1914. L = 108 
mm.; W = 62,5 mm.; T= 47 mm; C=11 mm. — @ Koh Lak Paa "/12 1914. L==115 mm; W = 61,5 
mm.; T = 46,5 mm.; C = 11,7 mm. — Irides: brown to yellowish white. Bill: light brown. Legs: flesh colour. 
