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SOME OF THE CASES MADE BY CADDIS-WORMS. 

 (Natural size.) 



STONE-TURNING— II 



By R. A, STAIG 



Illustrated from Original Photographs by JOHN A. BALLANTYNE 



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CADDIS-WORMS. 

 (Natural size.) 



M 



AY is 



a good 

 month 

 for stone-turn- 

 ing in the shal- 

 lows of our 

 streams and 

 hill burns ; but 

 almost any 

 day from early 

 spring to late summer numbers of aquatic 

 larvae and other forms of animal life may 

 be found concealed beneath the submersed 

 stones, and upon the under surfaces. 

 The latter is a favourite situation with 



certain Caddis-worms. These are the 

 larval stages of Caddis-flies, a family of 

 small insects with robust chocolate- 

 coloured bodies and four brown dehcately 

 fringed wings more or less ovate in shape. 

 They are often mistaken for moths. 



The Caddis-worm, when it comes out 

 of the egg, sets to work to make a pro- 

 tective case within which it lives. It 

 uses various materials for this pur]iose : 

 sand, tiny pebbles, chips of wood, nibl)lings 

 of leaves, bits of grass, and even minute 

 snail shells, with their owners inside, 

 whether they like it or not. The skill 

 shown in the construction of some of these 



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