A LITTLE ENTOMOLOGY 57 



Many are deterred from the study by the forbid- 

 ding nomenclature, but the scientific names are 

 really necessary to avoid confusion the same 

 popular name is applied to different insects in differ- 

 ent localities, e.g., the term May-fly is given to 

 the Green Drake, the Stone-fly, and the Grannom, 

 all flies that differ from one another as much as 

 they possibly can. However, as we shall take 

 other means to prevent confusion, we intend to 

 use in our discussion the scientific appellations 

 only for the different orders. 



All flies, which go to sustain trout and which 

 therefore concern the angler, may be roughly 

 divided into the following orders : 



It is impossible and certainly unnecessary to 

 examine in complete detail all these flies ; in fact 

 they have not all been thoroughly investigated ; 

 but we shall give a brief life-history of each order 

 that is typical of that order. 



The Ephemerida enjoy a varied life, the greater 

 part of which is spent beneath the waters. The 

 duration of the winged state is infinitesimal as 



