xii INTRODUCTION 



great preponderance of species of the TRICH- 

 OPTERA or caddis-flies 'over those of the EPHE- 

 MERID^E (by which name are known the duns 

 and spinners) and the PERLID^E or stone-flies ; 

 these are the chief families with which the dry- 

 fly fisherman need concern himself. There are 

 at least 179 described British TRICHOPTERA, 

 whilst the number of species of both the re- 

 maining families combined, in so far as these 

 islands are concerned, is but seventy or so. 



The angler will meet with so many diffe- 

 rent species of caddis-flies, that I am tempted 

 to devote more space to this branch of the 

 subject than the actual necessities of the 

 fly-tyer would seem to warrant. As Mr. 

 Half ord. strongly urges, for all practical pur- 

 poses the artificial patterns for this family, 

 with the exception perhaps of the Welshman's 

 button and the grannom, may be limited, 

 without disadvantage to the fisherman, to the 

 three representative types which form part of 

 the series of the thirty-three patterns. 



Coloured drawings of the TRICHOPTERA, though 

 helpful, are perhaps not quite so useful to the 

 student as outline drawings of palpi, genitalia, 

 and other important parts, and therefore for 

 the benefit of the angler who would delve more 

 deeply into a subject full of interest, in many 

 instances supplementary figures of these parts, 

 drawn under the microscope, have been given. 



It has been intended that this book should 

 form merely a supplement to the entomo- 

 logical chapters of the "Dry- Fly Man's Hand- 



