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



267. Pernis cristatus. Vieill. — The Crested Honey-Buzzard. 



Pemis cristatus: Robinson III p. 728; Robinson & Kloss p. 29. 



J Koli Lak v -ji2 1914. L = 600 mm.; W = 414 mm.; T = 208 mm.; Oulmen from cere = 22 mm. 

 — Irides: yellowish brown. Bill: black. Cere: yellow. Legs: yellow. 



An immature male without a crest was obtained at Koli Lak on the 12th of Decem- 

 ber 1914, and it is with some hesitation that I have referred it to P. cristatus Vieill. 



Immature specimens of the Honey Buzzards are only separated from each other 

 by very slight characters and a revision based on a large material is highly needed. 



268. Baza lophotes. Temm. — The Black-crested Baza. 



Basa lophotes: Gyldenstolpe II; Gyldenstolpe III p. 234; Barton p. 107; Muller p. 429; Robinson & Kloss p. 



25; Gairdner p. 151. 



$ Pak Kob 14 /s 1914. L = 325 mm.; W = 239 mm.; T = 146 mm.; C = 19 mm. — J 1 Pak Kob 

 22 / 3 1914. L = 300 mm.; W = 236 mm ; T = 142 mm.; C = 18 mm. — £ Pak Kob 15 / 3 1914. L = 286 

 mm.; W = 229 mm.; T = 133 mm.; C = 17 mm. — J 1 Bång Hue Pong 26 / 5 1914. L = 305 mm.; W = 

 226 mm.; T = 144 ram. — J Pak Kob 17 /i 1914. L = 286 mm.; W = 231 mm.; T = 139 mm.; C = 18,8 

 mm. — $ Koon Tan 7 / 6 1914. L = 300 mm.; W = 226 mm.; T = 150 mm.; C = 16,5 mm. — $ Pak 

 Koh 22 / 3 1914. L = 280 mm.; W = 231 mm.; T = 150 mm.; C = 17 mm. — Irides: brown. Bill: plumb- 

 eous grey. Legs: plumbeous. 



This beautiful Baza was not uncommon at Pak Koh and Koon Tan in Northern 

 Siarn. 



In the Siamese Malaya I never observed it during my excursions though it probably 

 occurs as it has been recorded from Träng and some other places further south. 



I found them in the open deciduous forests as well as in dense evergreen jungles 

 and they were obtained both in the lower valleys and on the summits of rather liigh hills. 

 They generally were seen perching on a dry branch in some high tree. Now and then 

 they made short flights after passing insects, which constitute their principal food. Wlien 

 perching they keep their long crests fully erect. Most often they were met with in pairs, 

 sometimes in small flocks of about 3 to 4 individuals. In their habit and behaviour they 

 seem to be rather lazy, never being on the move but for a short time. 



269. Microhierax caerulescens. Linn. The Red-legged Falconet. 



Microhierax ccerulescens: Oustalet 1899 p. 235. 



Microhierax entolmus: Gyldenstolpe I p. 64; Gyldenstolpe III p. 234; Barton p. 107. 



$ Pak Kob ai /s 1914. L = 135 mm.; W = 91 mm.; T = 63 mm.; C = 8 mm. — J* Bång Hue 

 Pong 9 / 6 1914. L = 148 mm.; W = 95 mm.; T = 66 mm.; C = 9 mm. — <$ Pak Kob 81 / 3 1914. L = 

 140 mm.; W = 92 mm.; T = 60 min.; C = 8,3 mm. — ^ Koon Tan 2 /o 1914. L = 156 mm.; W = 98 

 mm.; T = 72 mm.; C == 10 mm. — J 1 Doi Par Sakeng 9 / 7 1914. L — 162 mm.; W = 104 mm.; T = 72 

 mm.; C = 10 mm. — Irides: brownisb black. Bill: plumbeous. Legs: plumbeous. 



Fairly common in Northern Siarn but always in open forests. It was mostly seen 

 in old clearings perching on a branch of a dead tree. Their note is a characteristic »kee- 

 kee-kee.» 



