148 



tion of ten to one, and from what is already known, 

 we may conclude that their metropolis is in the 

 tropical regions. 



Elophorus, Fabricius, 

 Helophorid^, MacLeay. 

 Helophoridea, Leach. 



Mr, Westwood, in his late work, makes Spercheus 

 the connecting link between the Helophoridse and 

 Hydrophilidse. In its form and structure of the 

 legs it certainly accords with the former ; in habits, 

 however, I regard it as an Hydrophilus, and cer- 

 tainly it is more of an aquatic than any of the genera 

 composing the 



Helophorid^. 



