VI 



on the volume a more practical interest, for the 

 general naturalist . 



One of my main objects, however, has been to 

 call attention to the fact, that the Annulosa have 

 not been hitherto sufficiently considered, in the 

 great questions arising out of the distribution of 

 animals and plants ; hoping that, by so doing, 

 some few of our British entomologists, who have 

 not looked into this branch of their science, may 

 be induced to enlist themselves in the cause of 

 Insect geography. 



If such a result be brought about ; or if I 

 be fortunate enough to open for discussion any 

 of the topics which have been touched upon, and 

 so lead to a more perfect solution of the problems 

 which I have attempted to explain, I shall con- 

 sider myself more than repaid. 



10 Hereford Street, Park Lane, London, 

 May 10th, 1856. 



