186 THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
multiply instances to establish such a 
self-evident proposition. The more a 
group of insects is studied the better 
shall we know them ; constant looking 
at allied species will enable us to de- 
tect, one by one, slight differences, the 
sum of which gradually assumes an 
importance, which, when we first turned 
our attention to the matter, we had 
not anticipated. 
The Entomologist’s Weekly Intel- 
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