FLIES 41 



that he put it forward for the purpose 

 of giving such evidence as follows it. Our 

 experience (be it what it may be deemed 

 worth) is rather opposed to these and to his 

 argument. 



Trout show decided preferences for colours 

 (at least educated trout: and trout are be- 

 coming better educated or more frightened 

 the more any river is fished, flogged, and 

 poled). The actual process is too subtle 

 for our psychological powers, but we think no 

 angler who has studied the subject can fail 

 to realise the changes that have taken place 

 since Stewart wrote. 



We find that trout often prefer the new- 

 comer or fresh or later hatched-off insect. 

 Thus a preference for the ' Little Iron Dun ' 

 after a gorge of ' Blue Duns ' or ' March 

 Browns/ or after ' Greenwell's Glory ' has 

 passed over, promptly shows itself. We be- 

 lieve it well to anticipate, say with a red 

 quill or spinner, than to await its actual 

 appearance. 



We are of opinion that trout can dis- 

 tinguish colours though what these colours 

 appear to be to their fishy eyes, through an 



