706 MR. C. MORLBY ON THE COLEOPTERA OF NORFOLK AND SUFFOLK. 
XV. 
THE COLEOPTERA OF NORFOLK AND SUFFOLK 
Ry Claude Morley, F.E.S., etc. 
Read 29th March, 190 
The fact is often deplored by the student of geographical distribution 
that, while he is able to collect plenty of general and far-ranging 
data, the details of his scheme are wanting or but little apparent ; 
that it is easy to account for the presence of a certain animal only 
on a mountain top, whose place is entirely filled by another, though 
usually allied, animal in the adjoining valley, but very difficult to 
tell what influences determine the gradations of range of those 
kinds inhabiting the intermediate zone. Both Norfolk and Suffolk 
are so fortunate as to have their insect — and especially their 
coleopterous— fauna fully investigated ; it is, of course, impossible 
to say when a district list is complete, and probably so happy 
a state must always be impossible for a variety of obvious reasons, 
but these have been worked very thoroughly in comparison with the 
majority of the English counties. Consequently we have a capital 
basis upon which to Avork out the distribution of their Coleoptera, 
and it is much to be regretted that Cambridge and, I believe, 
Essex have never put forth efforts in the direction of county 
catalogues of their indigenous beetles. 
The approximation and similarity of physical features, botany 
and geological formation of the sister counties, renders the com- 
parison of their fauna particularly interesting. Norfolk has the 
advantage of more extensive broads and a longer seaboard, which 
is compensated to Suffolk by her greater extent of woodland and 
heath ; on the Avest both dip jointly into the fen country and both 
run to the sea through the eastern broads. Where they join 
