8 TItE ORDERS OF INSECTS. 



similar situations, most of them being black or greenish, often 

 with bronzy reflections. One section frequents marshes, and a 



Ground Beetle (Carabus Violaceus), natural size. 



few small species are found on the seashore at low-water mark, 

 thus being among the veiy few insects which may be looked 

 upon as marine. 



Dytlscus Marginalis (Male), natural size. 



Although so few insects inhabit the sea, great numbers are 

 found in fresh water, especially in their earlier stages ; but two 

 or three families of beetles are more or less aquatic in all their 



