48 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 



J 1 Koh Lak 21 /n 1914. L = 205 mm.; W = 117 mm.; T = 85 mm.; C = 18 mm. — ö * Koon Tan 

 1914. W = 120 mm.; T = 88 mm.; C = 17 mm. — Irides: brown. Bill: horn colour. Legs: black. 



This species, as well as the next one, was not uncommon in Siarn during the winter 

 months. Tliey were mostly observed high up among the mountains and sometimes 

 very shy and difficult to get into a proper range. Sometimes they were, however, rather 

 tame and rested on the roofs of the houses and bungalows. 



80. Monticola solitarius philippensis. P. L. S. Mull. — The Eastern Blue 



Rock-Thrush. 



Monticola solitarius philippensis : Gyldenstolpe I p. 40; Robinson III p. 752; Gyldenstolpe II; Gyldenstolpe 



III p. 170. 

 Monticola sölitaria: Muller p. 357. 

 Petrophila sölitaria: Robinson & Kloss p. 64; Williamson I p. 44. 



$ Pak Koh 21 / 3 1914. L = 20G mm.; W = 119 mm.; T = 88 mm.; C = 21 mm.; Tarsus 25,5 mm. 

 — Irides: brown. Bill: black. Legs: brownish black. 



In habits the Eastern Blue Rock-Thrush resembles M. cyanea, Linn. and it was 

 also found on the same localities. 



The specimen obtained is somewhat intermediate between 31. s. philippensis and 

 M . s. pandoo Sykes. The Eastern Blue Rock-Thrush breeds in South Eastern Siberia, 

 Manchuria, Eastern China, Corea, Japan and Formosa and is only found in Siarn during 

 the cold season. 



81. Monticola gularis. Swinh. — The White-throated Rock-Thrush. 



Monticola gularis: Robinson III p. 752. 



<$ Koon Tan. W = 98 mm.; T = 75 mm.; C = 15 mm.; Tarsus = 21 mm. 



A single specimen of the White-throated Rock-Thrush was obtained by Mr. Eisen- 

 hofer's native collector among the Koon Tan Hills. 



This species is only a migratory bird to Siarn and has previously been found once 

 in Cambodia and once according to Hartert (Vögel der Paläarktischen Fauna, Band I 

 p. 673), in the Malay Peninsula. Its breeding places are situated in the Ussuri valley 

 in Eastern Siberia, Manchuria and Northern China. 



My specimen agrees well with the description given by Hartert (tom. cit. p. 673), 

 but it has the blue feathers of the crown tipped with reddish brown, which probably only 

 is a sign of immaturity. The tail is also longer than recorded by Hartert, measuring 

 75 mm. against Hartert's 65 — 67 mm. In Hartert's description there is probably 

 a misprint about the length of the culmen which is stated to be 24 mm. It probably 

 ought to be 14 mm. 



•.->• 



82. Henicurus leschenaulti indicus. Hart. — Leschenaulfs Forktail. 



Ilenicurus leschenaulti: Gyldenstolpe III p. 170. 



<$ juv. Koon Tan 13 / 9 1914. L = 252 mm.; W = 106,5 mm.; T = 125 mm.; C = 22 mm.; Tarsus 

 29 mm. — <£ juv. Doi Par Sakeng ,c / 7 1914. L = 231 mm.; W = 103 mm.; T = 120 mm.; C = 21 mm.; 

 Tarsus = 29 mm. — Irides: brownish black. Bill: black. Legs: flesh colour. 



