00 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEUISH ZOOLOGICAL EXPEDITIONS TO SIAM. 



In the specimen from Doi Par Sakeng the bill is marked 011 the label as being horn 

 coloured while in the other specimen it is plumbeous. 



This last-mentioned bird therefore seems to be nearer 8. rujijrons rujijrons, but 

 it has the black shaft-streaks of the feathers of the forehead very distinct, and this stånds 

 against what is stated by Harrington who says »that the black shaft-streaks are indis- 

 tinct or wanting in rujijrons. The dull rufous colour of the crown is confined to the fore- 

 part of the head». 



In my specimen the whole crown and npper nape is cinnamon-rufous (Ridgway, 

 Plate 16) and not dull rufous. 



The breast of the Doi Par Sakeng specimen is much brighter coloured than that 

 of the other specimen which is dull olive brown shaded with ochraceous. 



I have therefore for the present refrained from giving a subspecific name to the 

 specimens collected in Northern Siarn, but the Doi Par Sakeng specimen probably be- 

 longs to 8. r. bhamoensis Harrington which is a more northern and western form, while 

 the specimen from Pak Koh belongs to typical 8. r. rujijrons Hume. 



When observed these birds kept to the undergrowth among the valleys which were 

 mostly clothed with dense evergreen forests. I never saw them sculking about among the 

 lower trees or bushes as Mixornis gularis minor which species they resemble very much 

 both as to habits and colouration. A marked difference exists, however, between these 



1 \vo species: in Stachyrhidopsis the bill is conical while in Mixornis it is slender and slightly 

 turved. 



104. Mixornis gularis. Raffl. The Sumatran Yellow-breasted Babbler. 



Mixornis gularis: Möller p. 370; Grant p. si; Bonhotc p. ti4: Kobinson & Kloss p. (>2; Kobinson I p. 10<>. 



£ Koh Lak 29 /u 1914. L = 124 mm.; W = 56 mm.; T = 55 mm.: C = 13 mm.; Tarsus = 16 mm. 

 — [rides: brownish red. Bill: plumbeous. Legs: vellowish brown. 



Only observed a few miles south of Koh Lak in the Siamese Malaya, where a small 

 party was met with on the top of an isolated limestone liill near the sea-shore. This spe- 

 cies seems to Ii ve up in the trees, mixed up together with Herpornis xantholeuca Hodgs. , 

 Jlypothymis azurea prophata Oberh, and Cyornis sumatrensis Sharpe, and was never 

 ol)served in the undergrowth or in low bushes as its near relative Mixornis gularis minor 

 which it resembles very much as to the plumage. It is, however, much larger than that 

 species and has the irides brownish red instead of white or yellowish white. 



The Sumatran Yellow-breasted Babbler inhabits Southern Tenasserim, the Malav 

 I 'en insula and Sumatra. 



10"). Mixornis gularis minor, subsp. n. The Siamese Yellow-breasted Babbler. 



Mixornis rubricapillus: Gyldenstolpe I p. 21; Gyldénstolpe II: Gyldenstolpe III p. 165; Oustalet 1013 p. 91: 

 Williamson I p. 42: Williamson II p. 77: Gairdner p. 148. 



