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REPORT OF THE COMMISSIONERS OF 



climb up on to the worsted perches until they are filled. Transport the boxes to the 

 water it is desired to stock, and shake the flies out on the bushes bordering the stream. 

 The flight of the May-fly covers a period of two weeks or such a matter on a stream 

 or lake, and on some waters they are much later than on others (I have seen them 



rise on the Saguenay as late as September), and Major 

 Turle says that if flies from an early rising stream are 

 transplanted to a late rising stream, the period of flight 

 may be extended. 



The fly which is sometimes confounded with the May- 

 fly or drake is the Caddis-fly, Fig. 4. 



This example is enlarged as will be seen from the lines 

 under the figure. Like the May-fly this figure shows the 

 Caddis with wings extended. At rest the wings of the 

 Fig-. 4. caddis-Fiy. Caddis-fly are folded close to the body. The larvae form 



of the Caddis-fly is called Caddis worm, in which stage it is eagerly sought as food 

 by fishes. Prof. Barfuth, of the University of Bonn, examined the stomachs of six 

 trout ; in one he found the cases of four Caddis worms ; in the second, one hundred and 

 thirty-six cases; in the third, five hundred and eighty-five cases; in the fourth, one 

 hundred and sixteen cases ; in the fifth, one hundred and eighty-six cases, and in the 

 sixth, one hundred and fifteen cases. 



Reaumur says the Caddis worms are " found in small streams and brooks, in ponds 

 and lakes ; in a word, in any piece of water which has plants living in or around it. 

 They are usually vegetable feeders, but not exclusively so. The body of their larvae 

 is lodged in a silken tube, to the outside of which are fastened fragments of different 

 substances selected for the purpose of strengthening and defending it. The sheaths 

 may be quite irregular, rough and prickly, or smooth and symmetrical. When the old 

 sheath becomes too narrow or too short the larvae makes a fresh one." (They fre- 

 quently repair or extend the old case instead of making a new one.) " Sometimes the 

 new sheath differs more from the cast-off one than our dress of to-day differs from that 

 of our grandfathers. * * * They employ very different materials, and the kind of 

 material largely affects the dress which they put on. They make use of whole or 

 nearly whole leaves, or little sticks and straws. Others use seeds, roots, grains of 

 sand and gravel, or the shells of water-snails and bivalves ; in short, all the materials 

 which can be found in water are employed by particular Caddis worms. In some 

 sheaths one only of these materials is employed, and these are the most neatly con- 

 structed. In other sheaths a number of different materials are made use of, so that 

 the larvae is dressed, so to speak, in raf° ^nd tatters, and its covering is altogether 

 shapeless." 



