330 HISTORY OF THE EUROPEAN FAUNA. 



of Asiatic origin we cannot positively affirm, but 

 whatever view we take, the general range of the 

 European species indicates that the migration took 

 place from the Alps in a south-easterly direction, or 

 to them in a north-westerly one. That is to say the 

 Oriental route, and not the Siberian, was utilised by 

 the migrants. 



Fortunately, we know a little more about another 

 Grasshopper genus, called Chrysochraon. There are 

 only two species, one of which, Chr. dispar, has been 

 found from Northern France to the mountains of 

 Servia, but not in the Alps. The other, Chr. 

 brachypterus, has a somewhat similar range in the 

 plain; but, moreover, it inhabits the Alps up to a 

 considerable height. It is interesting to note that 

 both these Grasshoppers again turn up on the Amur 

 in Eastern Siberia. 



In conclusion, I might mention one more Grass- 

 hopper, viz. Tettix, because it includes a species- T. 

 bipunctatus which, though well known in the plain of 

 Middle and North Europe, ascends the Alps to a 

 height of nearly 10,000 feet. It is one of the few 

 instances I know of an animal occurring in the 

 same form in such an enormous range of altitude 

 from sea-level to the highest regions where animal 

 life is known to exist. It is also known from Asia 

 Minor and Siberia. T. subulatus has a similar dis- 

 tribution, but is more common in Southern Europe 

 than the other. T. fuliginosus occurs in Lapland 

 and Siberia, T. meridionalis and T. depressus all 



