You’re fishing a heavy trico or pseudocleon hatch and you’ve done pretty well with size 24 flies by matching the hatch. However, some of the largest trout refused your best efforts even when you went to 8X and used a slack line cast. A trick which has been very successful for me when the hatch tapers off for the day is to switch to an entirely different pattern but one which these trout are accustomed to seeing—I like the Murray’s Flying Beetle size 16. When you spot a rise cast your Beetle two feet upstream of the trout so it drifts to him naturally. Many of the late-hatch feeders just can’t resist taking one more fly and the larger Beetle must appear especially appetizing.
