The Caddis-JVonn and its Houses. 317 



creatures obtained frorti the streams in our garden at Wailing - 

 ton. That it was attended with great amusement I need 

 hardly add. Should any one wish to discover more about 

 them, let them try experiments themselves with these creatures. 

 In the month of April they will find in the rivers the caddis- 

 worms in a most active state, each busily employed in building 

 their differently-formed cases. 



Desceiption of Plate. — Fig. 1. Case of a caddis, found in 

 the river where the current is slow. It is built of small 

 stones, attached to a long strip of wood, which balances 

 the weight of the stones. Fig. 2. Case of a caddis found 

 in rough waters. This is much heavier than the former. 

 Fig. 3. Case of a caddis when the larva was turned out of its 

 former one, and was supplied with the teeth of a tortoiseshell 

 comb. Fig. 4. Case as taken out of the river where the stream 

 is moderate. It is formed of the shells of planorbises and 

 shells. Fig. 5. Case made of jet. It should be added the 

 same larva made five cases from this same material. Fig. 6. 

 Case made of the filings of brass. Fig*. 7. Case made of 

 sprigs of red and white coral, and will be seen to be a 

 heavy one. Fig. 8. Case made from broken pieces of 

 different-coloured glass. Fig. 9. Case as existing in the 

 river, it consists of small stones and strips of wood, 

 one of which is much longer than the other. Fig. 10. 

 Case of caddis made of silver leaf. Fig. 11. Case of caddis 

 when the larva was supplied with pieces of coralline. It 

 will be seen that the pieces are put together in such a 

 manner that the case bears a great resemblance to basket- 

 work. Fig. 12. Case made when a caddis was supplied with 

 pieces of amethyst. Fig. 13. Caddis case constructed of pieces 

 of cairngorm. Fig. i4. Case made of willow shavings. 

 Fig. 15. Case of a caddis from a gently running stream; it 

 comists of small stones attached to two long sticks. Fig. 1(>. 

 Case made when the caddis was supplied with red coin I. li 

 will be seen that it closely resembles the one which is mado of 

 the red and white coral. Fig. 17. Case made of broken pie 

 of green glass. Fig. 18. Case formed of cornelian. Fig. I'. 1 . 

 Case made of broken pieces of shells. Fig. 20. Case from the 

 river, which consists of small stones with one stick attached. 

 Fig. 21. Case of caddis-worm as taken from the river. There 

 is a cherry stone attached to one side of tho case. Fig. 22. 

 Case of caddis made of small stones, to which is attacked a 

 long strip of wood. 



