20 OLD FLIES IN NEW DRESSES 



be much more likely to be accurate than 

 the latter and more difficult attempt. 



Besides this, possibly, as the eyes of 

 some families of fish are more highly 

 developed ^than those of others, the 

 relative shade values of colour might be 

 different to the different families, so that 

 if we eliminate colours from our lures, we 

 must have different shading for different 

 fish. 



Having considered all these things care- 

 fully, I have come to the conclusion that 

 it will be much safer and easier to keep 

 on using colours in our imitations, even if 

 we do present these imitations to a mono- 

 chromatic eye. 



Since writing the above article, I have 

 been able to collect some further informa- 

 tion with regard to the probable power of 

 the trout's eye to discriminate between 

 colours. 



These researches, though I have not yet 

 had time to carry them as far as I had 

 hoped, have led me to believe more firmly 

 than ever that I am right in recommend- 

 ing the use of colours in our imitation flies. 



