KUNGL. SV. VET. AKADEMIENS HANDLINGAR, BAND 56. w:0 2. : 105 
Fam. Trogonide. 
201. Pyrotrogon erythrocephalus. Goutp. — The Red-headed Trogon. 
Harpactes erythrocephalus: Gyldenstolpe I p. 57; Gyldenstolpe I]; Gyldenstolpe III p. 232; Oustalet 1899 p. 
278; Barton p. 107; Robinson III p. 735. 
oS Doi Par Sakeng “/; 1914. L = 295 mm.; W = 147 mm.; T = 194 mm.; B = 24 mm. — ¢ Doi 
Par Sakeng 2% 1914. I = 303 mm; W = 146 mm; T= 191 mm.; B= 24 mm. — f Koon Tan ""/o 
1914. L—=330 mm; W = 148 mm; T = 203 mm; B= 24 mm. — 2 Koon Tan */y 1914. L = 325 
mm.; W = 150 mm; T = 201 mm; B= 24 mm. — @ Koon Tan *%/5 1914. L = 301 mm.; W = 149 
mm.; T= 193 mm.; B= 25 mm. — Irides: reddish brown ¢; brown Q. Bill: black with the base blue. 
Legs: whitish grey. 
The Red-headed Trogon was generally distributed over the well-wooded parts of 
Northern Siam, though nowhere very common. 
The colour of the irides seems to be variable. One fine male from Northwestern 
Siam has the iris bright red while other males in my collection have it pale brown or 
inclining to reddish brown. The females, however, have the irides constantly brown. 
202. Pyrotrogon oreskios. Temm. — The Yellow-breasted Trogon. 
Harpactes oreskios: Gyldenstolpe I p. 57; Gyldenstolpe II; Gyldenstolpe III p. 232; Oustalet 1899 p. 279; 
Gairdner p. 150. 
Pyrotrogon orescios: Robinson & Kloss p. 39; Grant p. 106; Robinson I p. 92; Robinson III p. 736. 
eee one Date | Length | Wing | Tail [Bill from gape 
| | mm. mm. mm. mm. 
| 
| of Koon Tan Se 1914 280 125 174 21,3 
_. Koon Tan "%, 1914 280 126 182 2 
a Koon Tan Sf, 1914 | 265 129 182 21,5 
| Pa Hing J 1914 | 263 126 | 180 22 
ie} Koon Tan 24/6 1914 | 270 124 181 22 
9 Koon Tan Bf, 1914 271 127 177 21 
2 Pak Koh 8/y 1914 263 121 173 20 
Q Pak Koh 4/5 1914 275 125 169 19,8 
Q Koh Lak Paa Taz 1914 290 1265 | 179 | 21,5 
Trides: brownish black. Bill: bluish black. Legs: bluish green. 
The Yellow-breasted Trogon is generally distributed over the whole of Northern 
Siam, where it seems to be less addicted to the evergreen forests than Pyrotrogon erythro- 
cephalus GOULD. 
It is quite a tame and fearless bird. When disturbed it retires to a tree close by 
the place from where it was flushed away and then it always turns the back with its 
plain colouring against the disturber, never showing the brilliant colours of the breast and 
underparts of the body. It has a smacking note which is fairly loud and may be heard 
some distance. 
K, Sv. Vet. Akad. Handl. Band 56. N:o 2. 14 
