LEGS OF SILO NIGRICORNIS 21 



characters on which the modern system of 

 classification is based. 



I do not propose to deal at length with the 

 PERLID.E, and the odds-and-ends of insect life 

 which go to furnish the trout's larder. A few 

 figures of these insects are given, and these with 

 the accompanying descriptions will no doubt 

 prove sufficient for the requirements of most 



TR F T TAR 



FIG. 2. Legs of Silo nigricornis. 



A. Anterior leg. B. Median leg. C. Posterior leg. 

 C. coxa. TR. trochanter. F. femur. T. tibia. TAR. tarsus. 



trout fishermen. At the end of this book I give 

 complete lists of described British EPHEMERID^, 

 TRICHOPTERA, and PERLID^E, and a table show- 

 ing the genera and species of these Orders ob- 

 served on a typical chalk stream, the Test, and 

 the species that have been sent me from time 

 to time from a typical rough country river, 

 the Derbyshire Dove ; giving in each case the 

 months during which the insects occur, 



