Ropinson & Kxioss: Birds of West Sumatra. 191 
Their progress through the forest is not so very fast ; 
some kinds moving in the crowns of the trees, others nearer 
to the ground amongst the bushes, according to the indivi- 
dual habits of each species. The mixed flocks are very 
often headed by particular kinds of birds ; in the mountain 
forest of Sumatra I usually observed RhAipidura albicollis 
atrata or Bhringa remifer in the vanguard. Not all kinds 
of birds join these mixed flocks ; birds of prey, of course, 
never form part of them. 
Pericrocotus sp., Rhipidura albicollis atrata, Dendro- 
sitta azurea expectata, Cryptolopha, Hemipus picatus, 
Parus major malayorum, Zosterops buxtoni, Sibia 
picaoides simillima, Pyrotrogon oreskios, Picumnus 
-tnnominatus malayorum, Culicicapa ceylonensis, Mesia 
laurinae, Bhringa remifer, are some of the birds which 
I observed travelling in mixed flocks. 
It is exceedingly curious that the mixed flocks of birds 
are often accompanied by squirrels, viz., Sciurus tenuis. 
This fact I observed repeatedly on different mountains 
in Sumatra. 
The mixed flocks do not only occur in the forest : 
I observed them very often in my own garden at Fort 
de Kock. These flocks are much smaller, not more than 
perhaps six to twelve birds, and consist of a small number 
of species. They visit my own and the neighbouring gardens 
in the morning at about 7 a.m. The flock is usually made 
up of the following species: Parus major malayorum, 
Aegithina viridis, Orthotomus cineraceus, Zosterops 
buxtoni, and Leptocoma jugularis. 
Il. COLLECTING STATIONS. 
By E. JACOBSON. 
The following collecting stations will be found on the 
accompanying maps. The places Serapei and Penatei in 
Korinchi are not shown. They are situated on the Merangin 
River to the south-east of Sandaran Agung. 
Air Bahar, Mount Dempu, Pasemah, Palembang, 1200 M. 
See under Mount Dempu. 
Air Gaung Ketjil, Mount Dempu, Pasemah, Palembang, 
1800-1900 M. 
See under Mount Dempu. 
Air Njuruk, Mount Dempu, Pasemah, Palembang, 1200- 
1800 M. 
See under Mount Dempu. 
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