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found in Bengal, and is replaced in New Holland by that of 

 helluo. 



The island of Madagascar approximates in some respects, 

 as to the natural families of insects, to Africa, but its species 

 are very distinct, and even many of them have no analogues. 

 The isles of France and Bourbon, also present vestiges of 

 similar affinities ; the insects of these colonies seem in gene- 

 ral to partake more of the character of those of the East 

 Indies. Their number is very limited. 



Although the entomology of New Holland forms a special 

 type, it is nevertheless composed in a great measure of species 

 analogous to those of the moluccas and south-eastern India. 

 New Holland is to be sure less abundant in its insect popu- 

 lation, being, at least in the parts with which we are ac- 

 quainted, more dry and less wooded, and analogous to that 

 of the Cape of Good Hope. The genus of the Mylabris, the 

 species of which are so abundant in the south of Europe, in 

 Africa, and in Asia, does not appear to proceed beyond the 

 Isle of Timor. New Holland, would seem, in this respect 

 to have traits of similitude with America. There we find 

 certain of the passalus, a genus whose species peculiarly inha- 

 bit the New World. It is probable, that considered under 

 the relation of generic groups, the productions of the western 

 hemisphere have more affinity with those of the east of Asia 

 than with ours. We know, for instance, that the pouched 

 animals are confined to the eastern extremities of the old 

 continent. Many similar examples might be alleged, and 

 the class Crustacea furnishes not a few. 



The insects of New Zealand, of New Caledonia, and pro- 

 bably those of the neighbouring islands, have much affinity 

 with the insects of New Holland. It may be presumed 

 that the same holds good of some other Archipelagoes of the 

 great Austral Ocean. Those islands, composed for the most 

 part of aggregations of polyparia, form a chain which unites 



