DUTCH BORNEO-EXPEDITION. 2614 
Hose found a nest of this species with two young birds 
only, we may fairly conclude that this is the full number 
of the eggs of a clutch. 
Another (empty) nest belonging to this species, and of 
the same construction, I found very near the top-platform 
of the mountain, at an elevation of 1100 m., on a pro- 
jecting boulder of a hugh rock, being protected from the 
rain by an overhanging part of the rock just above it. 
From all we know from the few collectors who hitherto 
chanced to meet with this species, it must be considered a 
highland form, living along small mountain-streams in 
rocky territory. Mr. Whitehead is the first to tell us about 
its nesting in crevices of rocks (Ibis 1889, p. 269), while 
Mr. Hose found his above-mentioned nest placed on a 
tree-stump. 
This species is, up to this date, known from North and 
North-west Borneo and the Liang Koeboeng. The above 
mentioned young bird from Southern Borneo in the Leyden 
Museum is hardly collected at Banjermasin as is mentioned 
on the label, but is most likely collected in the mountain- 
region during Schwaner’s journey across the island from 
the mentioned place to Pontianak in West Borneo. 
229. Erithacus cyaneus. 
Motacilla cyanea Pallas, Reise Russ. Reichs, III, p. 697 (1766). 
Erithacus cyaneus Everett, L. B. Born. p. 98; Sharpe, Ibis 1889, p. 268. 
Erithacus cyaneus Hose, Ibis 1893, p. 383. 
A small number of this species obtained on Mount Ke- 
nepai (550 m.) in January, and on the Liang Koeboeng 
(800 m.), March and April 24, This very nice little bird 
is found in high forest as well as in low jungle, very 
quickly running along the ground in search for insects, 
especially white ants and their larvae. 
This species breeds in Eastern Siberia and passes the 
winter months in more southern districts of the continent 
and in Borneo. On this island it is recorded from Labuan 
(Low), Kina Balu (Whitehead) and Baram District (Hose). 
Notes from the Leyden Museum, Vol. XXI. 
