AMERICAN TROUT-STREAM INSECTS 



moved back and forth continuously. The dull 

 gray-black wings lie close over the long, thin body. 

 The imitation is useful at any time, and may be 

 continued through June, as the yellow-horn con- 

 tinues to rise throughout that month. 



No. 23. Speckled dun. This is very similar in 

 size and shape, but much more attractively colored. 

 It is out on warm days in great numbers; and the 

 imitation makes one of the best small duns of the 

 entire season. The speckled dun continues in flight 

 through June, and a few may be seen in July; 

 though the specimens I caught in that month were 

 slightly larger and darker in color. It is a first- 

 rate little floater ; in fact, when the large drakes are 

 absent these small duns are the flies best to use; 



I venture to assert that this selection of insects 

 is more than sufficient for the purpose of the prac- 

 tical fly-fisher during the month of May. Some of 

 these insects continue over the water through June 

 or even longer, while others appear before May — 

 in fact, even as early as March. I also am quite 

 sure these insects will be found useful for fishing 

 in all the trout waters of the temperate regions, in 

 the East and in the Middle West. 



May insects are so very numerous that I found 

 it the greatest difficulty to bring down, by elimina- 

 tion, the number to reasonable limits ; I was guided 

 in the selection by my experience in past years as 



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