138 



SALMON FLIES 



the latter to lie on the top of the shank and 

 exactly coinciding with the line of junction of 

 the upper edges of both wings, where, after 

 being twisted and pulled tight, it may be cut 

 off close. 



The principles of this manipulation are diffi- 



FIG. 54. 



cult to describe in words, but can, perhaps, be 

 understood by studying the diagrams (Figs. 55, 

 56, and 57), which illustrate it on a magnified 

 scale. 



All that remains to be done now is to cut 



