Such are the interesting sub-family of Longicorn coleoptera--Tmesisternitae; one of the best-marked genera of Buprestidae--Cyphogastra; and the beautiful weevils forming the genus Eupholus.

Among butterflies we have the genera Mynes, Hypocista, and Elodina, and the curious eye-spotted Drusilla, of which last a single species is found in Java, but in no other of the western islands.
The facilities for the distribution of plants are still greater than they are for insects, and it is the opinion of eminent botanists, that no such clearly-defined regions pan be marked out in botany as in zoology.

The causes which tend to diffusion are here most powerful, and have led to such intermingling of the floras of adjacent regions that none but broad and general divisions can now be detected.

These remarks have an important bearing on the problem of dividing the surface of the earth into great regions, distinguished by the radical difference of their natural productions.

Such difference we now know to be the direct result of long-continued separation by more or less impassable barriers; and as wide oceans and great contrast: of temperature are the most complete barriers to the dispersal of all terrestrial forms of life, the primary divisions of the earth should in the main serve for all terrestrial organisms.