124 WNILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
of Central Siam where numbers of specimens were seen flying to and fro near the ground 
in search of food. 
In the Siamese Malaya it was never observed during my stay there from November 
1914 to February 1915. 
250. Circus eruginosus eruginosus. Linn. — The Marsh-Harrier. 
Circus e@ruginosus: Gyldenstolpe I p. 63; Williamson I p. 47; Miller p. 430; Robinson & Kloss p. 11. 
Q Koh Lak '/12 1914. L = 480 mm.; W = 378 mm. T = 238 mm.; C = 21 mm. — do Koh Lak 
"4/14 1914. = 550 mm.; W = 398 mm.; T = 255 mm.; C = 22 mm. — @ Koh Lak */12 1914. L = 528 
mm.; W = 411 mm; T = 254 mm; C = 24 mm. — @ Koh Lak ¥/12 1914. L = 490 mm.; W = 389 mm.: 
T = 240 mm.; C = 22 mm. — Irides: yellowish brown. Bill: blackish. Legs: yellow. 
The Marsh-Harrier is a common winter visitor to the plains and open country of 
Central Siam and the Siamese Malaya. It chiefly haunts marshy ground or rice-fields. 
All the specimens obtained are young birds and not a single adult was met with. 
251. Astur trivirgatus rufitinctus. McCreLx. — The Crested Goshawk. 
Lophospizias trivirgatus: Gyldenstolpe II; Gyldenstolpe III p. 234; Robinson I p. 90. 
S Pak Koh '/s 1914. L = 376 mm.; W = 221 mm.; T = 197 mm.; C = 18 mm. — Irides: bright 
yellow. Bill: horn colour. Legs: yellow. : 
The Crested Goshawk seems to be very rare and only a few specimens were ob- 
served in Northern Siam besides the fine male which was obtained at Pak Koh on the 
16th of April 1914. 
It seems to avoid evergreen jungles and the lower valleys with their dense vegeta- 
tion, and it was only met with in the deciduous forests or in thin tree jungle. 
This subspecies is distinguished from the typical Astur trivirgatus TEMM., which 
inhabits the Indian Peninsula and Ceylon, by its larger size. 
252. Astur badius poliopsis. Humz. — The Burmese Shikra. 
Astur badius poliopsis: Oustalet 1899 p. 238; Gyldenstolpe UT p. 234. 
Astur poliopsis: Gyldenstolpe I p. 63; Robinson & Kloss p. 22; Gyldenstolpe II. 
Astur badius: Williamson I p. 47. 
Nisus badius: Finsch & Conrad p. 345. 
Accipiter badius: Gould p. 151. 
Micronisus poliopsis: Miller p. 430. 
Sex Locality Date Length Wing Tail Culmen | Tarsus 
mm. mm. mm. mm. mm. 
Q Koon Tan 5/5 1914 359 213,5 170 15 47,5 
2 Pak Koh S/a 1914 339 215 175 15 50 
fe} Bang Hue Pong 8/5 1914 340 209 179 15 48 
ou Pak Tha 17/3 1914 300 186 158 14,5 45 
ou Koh Lak 12/7, 1915 310 187 156 12 40 
o juv. | Bang Hue Pong 26/5 1914 300 185 r53 14 46 
Q juv. | Bang Hue Pong | 77/5 1914 295 181 133 14 47 
Irides: yellow or brick red (adult), dirty yellow (juv.). Bill: plumbeous (adult), black (juv.). Legs: yellow. 
