58 SALMONIA. 



ephemera, which is of the same colour as that 

 which is seen in some rivers in the beginning 

 of July. In September and October this kind 

 of fly is found with an olive body, and it be- 

 comes darker in October, and paler in No- 

 vember. There are two other flies which 

 appear in the end of September, and continue 

 during October if the weather be mild: a large 

 yellow fly with a fleshy body and wings like 

 a moth ; and a small fly with four wings, with 

 a dark or claret-coloured body, that when it 

 falls on the water has its wings, like the great 

 yellow fly, flat on its back. This, or a claret- 

 bodied fly, very similar in character, may be 

 likewise found in March or April, on some 

 waters. In this river I have often caught 

 many large trout in April and the beginning 

 of May, with the blue dun, having the yellow 

 body ; and in the upper part of the stream 

 below St. Albans, and between that and Wat- 

 ford, I have sometimes, even as early as April, 

 caught fish in good condition : but the true 

 season for the Colne is the season of the May- 

 fly. The same may be said of most of the 

 large English rivers containing large trouts, 



