108 FLIES FOR S E P T E M 1>> E K . 



No. 42. WHIRLING BLUE DUN. 



This fly comes from a water nymph a, lives 

 about three days as shewn, 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. 



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. 



