230 



dropped into the water beneath bushes that 

 grow on the banks of pools where large fish 

 lie, and are the most likely places. In rivers 

 clearing off after floods in the summer they 

 do well, and are also good for perch in deep 

 running water. These cad worms produce 

 many of the flies for the season after remain- 

 ing during the cold weather at the bottom 

 rolling about, and when the spring and sum- 

 mer appear they change into thesQ beautiful 

 insects ; before the change takes place, during 

 the winter, they form themselves a cover to 

 protect them from the inroads of their enemies. 

 Their instinct-i' prompts them to incase them- 

 selves like a snail in a piece of hollow reed, 

 open at each end, and covered with small gravel 

 and little shells, which they attach with a kind 

 of glutinous substance to resist the force of 

 the water ; they creep on the bottom with six 

 legs, and having their little house on their 

 backs draw into it at pleasure, and settle 

 amongst the stones like a piece of rotten 

 branch or stick. The Trout and other fish 

 feed upon them in the winter, when the winged 

 insects are nowhere to be seen. 



* Given them by the Great Author of nature. 



