130 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
267. Pernis cristatus. Vier. — The Crested Honey-Buzzard. 
Pernis cristatus: Robinson III p. 728; Robinson & Kloss p. 29. 
do Koh Lak #%/i2 1914. L = 600 mm.; W = 414 mm.; T = 268 mm.; Culmen from cere = 22 mm. 
— Trides: yellowish brown. Bill: black. Cere: yellow. Legs: yellow. 
An immature male without a crest was obtained at Koh Lak on the 12th of Decem- 
ber 1914, and it is with some hesitation that I have referred it to P. cristatus VIEILu. 
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. Tremm. — The Black-crested Baza. 
Baza lophotes: Gyldenstolpe II; Gyldenstolpe TI p. 234; Barton p. 107; Miller p. 429; Robinson & Kloss p. 
25; Gairdner p. 151. 
@ Pak Koh 14/3 1914. L = 325 mm.; W = 239 mm.; T = 146 mm.; C = 19 mm. — ¢ Pak Koh 
2/5 1914. L = 300 mm.; W = 236 mm; T = 142 mm; C = 18 mm.-— ¢ Pak Koh /s 1914. L = 286 
mm.; W = 229 mm; T= 133 mm.; C = 17 mm. — ¢ Bang Hue Pong 74/5 1914. L = 305 mm.; W = 
226 mm.; T = 144 mm. — Pak Koh !"/s 1914. L = 286 mm.; W = 231 mm.; T= 139 mm.; C = 18,8 
mm. — 2 Koon Tan 7/5 1914. L = 300 mm; W = 226 mm; T = 150 mm.; C = 16,5 mm. — Q Pak 
Koh */s 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 
Siam. 
i In the Siamese Malaya I never observed it during my excursions though it probably 
occurs as it has been recorded from Trang 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 high 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. When 
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 cerulescens. Linn. — The Red-legged Falconet. 
Microhierax cerulescens: Oustalet 1899 p. 235. 
Microhierax entolmus: Gyldenstolpe I p. 64; Gyldenstolpe III p. 234; Barton p. 107. 
@ Pak Koh *!/5 1914. L135 mm.; W=91 mm; T = 63 mm.; C= 8 mm. — ¢ Bang Hue 
Pong */5 1914. L = 148 mm; W= 95 mm; T = 66 mm.; C = 9 mm. — of Pak Koh ™/s3 1914. L= 
140 mm.; W = 92 mm; T = 60 mm; C == 8,3 mm. — Koon Tan 2/5 1914. L = 156 mm.; W = 98 
mm.; T= 72 mm; C= 10 mm. — ¢ Doi Par Sakeng /7 1914. L = 162 mm.; W = 104 mm.; T = 72 
mm.; C = 10 mm. — Irides: brownish black. Bill: plumbeous. Legs: plumbeous. 
Fairly common in Northern Siam 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.» 
