54 SALMONIA. 



usually found in the middle of the day, 

 such as the willow fly ; and the cow dung fly 

 is sometimes carried on the water by winds. 

 In March there are several flies found on 

 most rivers. The grannam or green tail fly 

 with a wing like a moth comes on generally 

 morning and evening, from five till eight 

 o'clock, A. M. in mild weather in the end of 

 March and through April. Then there are 

 the blue and the brown, both Ephemerae, 

 which come on, the first in dark days, the 

 second in bright days; these flies when well 

 imitated, are very destructive to fish. The 

 first is a small fly with a palish yellow body, 

 and slender beautiful wings, which rest on 

 the back as it floats down the water. The 

 second, called the cob in Wales, is three or 

 four times as large, and has brown wings, 

 which likewise protrude from the back, and 

 its wings are shaded like those of a par- 

 tridge, brown and yellow brown. These 

 three kinds of flies lay their eggs in the 

 water, which produce larvae that remain in 

 the state of worms, feeding and breathing 

 in the water till they are prepared for their 



