4-94- GEOGRAPHICAL DISTRIBUTION OF INSECTS. 



tention under the second branch of our present subject 

 the topographical distribution of insects; namely, their 

 Climates, their Range, and their Representation. 



i. Entomologists, taking heat for the principal regu- 

 lator of the station of insects, have divided the globe 

 into entomological dimfites. Fabricius considers it as 

 divisible into eight such climates, which he denominates 

 the Indian, Egyptian, Southern, Mediterranean, Northern, 

 Oriental, Occidental, and Alpine. The first containing 

 the tropics ; the second, the northern region immediately 

 adjacent; the third, the southern; the fourth, the coun- 

 tries bordering on the Mediterranean sea, including also 

 Armenia and Media; the fifth, the northern part of 

 Europe interjacent between Lapland and Paris; the 

 sixth, the northern parts of Asia where the cold in win- 

 ter is intense ; the seventh, North America, Japan, and 

 China; and the eighth, all those mountains whose sum- 

 mits are covered with eternal snow a . M. Latreille ob- 

 jects to this division, as too vague and arbitrary and not 

 sufficiently correct as to temperature ; and observes, with 

 great truth, that as places where the temperature is the 

 same, have different animals, it is impossible, in the actual 

 state of our knowledge, to fix these distinctions of cli- 

 mates upon a solid basis. The different elevations of 

 the soil above the level of the sea, its mineralogical com- 

 position, the varying quantity of its waters, the modifi- 

 cations which the mountains, by their extent, their height, 

 and their direction, produce upon its temperature ; the 

 forests, larger or smaller, with which it may be covered; 

 the effects of neighbouring climates upon it, are all 



Phttos. Entomolog. ix. 20. 



