THE DIPTERA. THE RISE. 69 



flying imago condition within the shelter of this retreat, it 

 crawls to the surface and finally takes flight. 

 The best known form of this fly is the Alder. 



THE DIPTERA, OR TWO-WINGED FLY. 



The immense varieties of this class of insect pre- 

 clude more than a brief reference to those forms which 

 the fisherman is most likely to copy as artificial flies. 

 These are: the Black Gnat, the Oak Fly, the Spider Fly, 

 the Cow-dung, the Golden Dun, the Hawthorn Fly, and the 

 Claret Smut, sometimes known as the Red Quill Gnat. 



The larval and pupal characteristics of the flies differ 

 widely, and the student can do no better than consult 

 entomological works on this and the other families of 

 Water Insects. 



For choice, I should recommend to the student Mr. 

 Frederic M. Halford's work, "The Dry Fly Entomology." 



THE RISE. 



Trout rise to the fly at all hours and during all weathers. 

 In the early moments of dawn, during the hottest hour of 

 an autumn day, as the sun sinks, as darkness descends, 

 and during the stilly hours of a midsummer night, distinct and 

 noticeable rises of trout may be witnessed. If I had, however, 

 to select any particular four hours during the whole season 



