160 ENTOMOLOGISK TIDSKRIFT 1914. 
June. But most waters are by this time fully thawed, and, 
though often fed with cold ice-water, the animal life is already 
in developing. The waters are also, as the case generally 
is in this zone, very small and are therefore quickly heat- 
ed up. 
Polyartemia forcipata FISCHER. — I have met with this 
species at only one locality, a small, rather deep pond (one 
of the Folo-ponds) in Regio subalpina (900 m. above the 
Fig. 1. Map, showing the distribution of Polyartemıa 
forcipata in Scandinavia. 
sea-level) about 5 km. in the south of Mittakläpp, Härjedalen 
(lat. 62° 43 N.). The animals were seen in great abundance, 
males and females being found in almost equal numbers. 
Also very young and small specimens were rather common. 
The muddy bottom was covered with a thick deposit of old 
leaves from the surrounding thickets of Salix lapponum. At 
12,30 p. m. the temperature was found to be + 21° C. by 
the shore, though the little lake was fed by a melting snow- 
drift close to it. The lake belongs to those, which do, not 
