
36 8. COLLETT. 
the counties of Stavanger, and Söndre Bergenhus. From the 
mountain plateaux on the frontier of the Kingdom in Trondhjem 
Stift, they, constantly, in the same year flood all the lowlands 
about the Trondhjem's Fjord on our side, and, on the other, the 
adjoining districts of Sweden. 
During the entire course of the summer and autumn, the 
individuals continue to pour forth from the mountains, and the 
main bodies of these migratory individuals consist, as previously 
mentioned, of the full grown young of the litters born sucees- 
sively in the summer. But comparatively few of the old stock 
are to be seen amongst the hordes. : 
The individuals find their way from the edge of the moun- 
tain plateaux down into the valleys, and it is there that they 
first attract attention while crossing the country roads, or when 
proceeding down by these for a while. 
In the valleys they invariably meet with lakes or rivers, 
and å large number of individuals constantly endeavour to cross * 
them. If the mountains are high on both sides, the valley will, 
as å rule, receive coutributions from each slope, and individuals 
may be observed crossing the river in both directions. 
Qccasionally, however, individuals may be on the march, 
and present in super-abundance on one side of the valley, whilst 
entirely, or almost entirely, absent on the other. 
It is remarkable that they are but seldom seen wandering 
upwards, and only exceptionally will they, as previously stated, 
again populate å mountain plateau. This probably only takes 
place when they have wintered in the upper regions of the 
mountain sides, whence the distance to the plateau, or the home 
they had left, is not great. 
On the uplands themselves, during a prolific year they are 
on the move at all heights. In 1891, individuals were seen on 
the summit of Snehætten, about 2306 métres above the sea. 
During minor migratory years, most individuals confine their 
wanderiugs to the nearest valleys, where they settle down on 
serub covered or moss grown tracts, and take up their abode 
for the winter under willows, juniper bushes, or under the floors 
[No. 8. 

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