It appears from thi.s table that the spor.idicitv of genera i.s 

 le.ss than might be supposed ; the result would no doubt have 

 been different, if the number of regions were more con- 

 siderable, but the fact Avould remain not less true upon the 

 whole. It will be observed also that the Carabid.-e, which con- 

 stitute of themselves at least nine-tenths of the creo-thalero- 

 phagous genera, are those whose geographical extension is 

 most considerable ; but this holds true only among the coleop- 

 tora. AVhen the whole cla^s is takep into account, the phyto- 

 thalerophaga have an indisputable superiority. 



The next interesting inquiry was to ascertain in what pro- 

 portion all these genera are distributed among the eight regions 

 above noted ; thi.s is sliewn by the following table, which pre- 

 sents the total number oi" the genera of each family found ui 

 every one of these regions, that of the genera proper to eacli, 

 and the proportion existing between these two numbers. 



vor,. .\xvrir. so. i,v. — JAXUAnv 1840. M 



