72 Tableau of High Asia. [No. 1, 
tles probably follow the highest formation of grassy turf in the Hima- 
laya, as well as in the Andes and the Alps. Mosquitoes go up to 
8,500 ft.; and peepsies make themselves very troublesome during the 
rainy season as high as 13,000 ft. 
The existence of nfusoria seems as little subject to limitation by 
height in High Asia, as in the Andes and Alps. In a few fragments 
which we chipped off from the rocks of the Ibi Gamin pass (20,459 
ft.) Prof. Ehrenberg of Berlin detected their presence, and found 
them not insignificant in quantity ; he discovered twelve species new 
to science. 
