THE EPHEMERID^E. 63 



body, meeting, tent-shaped, at their upper edges and gradually 

 diverging in the posterior direction. 



THE PERLID.E. The wings are placed in a flat position, 

 running backward from the shoulder in horizontal planes, 

 and crossing or overlapping one another over the body. 



THE DIPTERA. The wings generally, like the Perlidae, are 

 placed in horizontal planes ; in most cases they do not overlap, 

 but diverge from one another, as in the common bluebottle. 



There are over 200 different species of Water Beetle, the 

 numerous family of the Notonectidae, besides the larvae of 

 the above flies, etc., upon all of which trout exist, and, 

 therefore, the wet-fly fisherman may well imitate other forms 

 of sub-aqueous life, apart from the larval, the pupal or 

 other conditions of such flies. Of such lures " Corixa" and 

 the fresh-water shrimp are perhaps the best. These ingenious 

 artificial insects are excellently tied by Mrs. Richardson, and 

 sold by Messrs. Ogden Smith, Hardy Bros., Farlow, 

 Bernard, Little, Eaton & Deller, The Stores, and other dealers. 



THE EPHEMERID^E. 



The sub-aqueous existence of one of the Ephemeridas 

 occupies the greater portion of its life. From the period at 

 which it leaves its egg until it becomes a flying insect it is 

 undergoing a gradual metamorphosis, and, like the Perlidas, 

 at no time does it assume the real pupal condition, that 

 is, the dormant chrysalis stage, common to the Trichoptera, 

 Sialidae, and the Diptera. 



