MAYFLIES, DUNS AND SPINNERS 251 



A. E. Eaton. On many rivers it is most plentiful, 

 and is taken freely by the trout. It is essentially an 

 inhabitant of rapid streams, and even to this day few 

 fishermen on this class of river are votaries of the dry- 

 fly. It is larger than any of the Ephemeridae referred 

 to herein with the exception of the mayfly. 



In " Dry-Fly Entomology " I say of it : " It is a 

 large fly of the usual form of the Ephemerids, the 

 wings of the female measuring about "55 and of the 

 male '50 of an inch ; the body of the female about '65 

 and of the male "60 of an inch. It has two dark 

 brown setse, a reddish-brown thorax, and body of 

 reddish brown with light fawn-coloured joinings. The 

 wings are a faint brown colour with strong brown 

 nervures, and the legs more or less dark brown in 

 colour. The nymph of Pictet's larves plattes can be 

 identifiied from the plate. The imago of the march 

 brown is the great red spinner of Ronalds." 



The yellow may dun is an insect often seen on the 

 chalk-streams from June through 

 </ Yellow may dun. the summer until October. It 



' generally hatches out in the 



evenings, and many of my friends have declared that 

 the trout feed on it ravenously. At one time Marryat 

 and I dressed imitations of it with upright hackle point 

 wings dyed a sulphur-yellow, hackle and whisk dyed 

 a greenish yellow, and a quill body dyed lemon- 

 yellow. We never killed a sizable trout with the 

 pattern, and in many hundreds of autopsies found 

 only one solitary specimen. Still it is said that in 



