124 FLIES FOR SEPTEMBER. 



No. 42. THE WHIRLING BLUE 

 DUN. 



This fly comes from a water nympha, lives 

 about three days as shown, then turns to a 

 Light Red Spinner. It is in season until the 

 middle of October, and on the water chiefly in 

 blustering cold weather. It has been supposed 

 to be a second edition of the Yellow Dun of 

 April. If compared with that it will be found 

 rather smaller and more of a ginger colour. 



IMITATION. 



BODY. Squirrel's red brown fur mixed with 

 yellow mohair, tied with yellow silk thread well 

 waxed. 



TAIL. One" or two whisks of a pale ginger 

 hackle. 



WINGS. Feather from a starling's wing not 

 very light. 



LEGS. Pale ginger hackle. 



Hook No. 2, Grayling. 



The Red Spinner lives three or four days. 

 In making it, reference may be had to fig. 3, 

 plate 4. It must be rather lighter than that 

 figure. 



