102 



HOW TO TIE FLIES. 



It is to be observed that in a fly, winged by the 

 first method given, the dark side of the winging 

 feather is exposed, and vice versti by the second. 



Wings prepared after the second method may, 

 when the fly is complete, be converted into 

 " rolled " wings by their tips being twirled. The 

 modus operandi is familiar to owners of moustaches. 

 Personally, I do not admire " rolled " wings. 

 They wear well, but this seems to be their 

 only advantage. It is, however, sometimes 

 convenient to "roll" the wings of a fly when, 



FIG. 57. Sections of wings. A As prepared by first 

 method. B As prepared by second method. The 

 thick lines indicate the dark side of the feather. 



after continued use, they become somewhat 

 draggled. 



Sometimes the four thicknesses of the wings 

 are accurately paired. That is to say, that of the 

 two outside thicknesses one is taken from a 

 certain part of some particular feather of the 

 right wing of a bird, and the other from the 

 corresponding part of the corresponding feather 

 of the left wing of the same bird ; and the 

 two inside thicknesses are, of course, similarly 

 obtained. This plan may have its advantages in 

 securing perfect symmetry, but I do not find it 

 easy to carry out in practice, nor, indeed, to give 



