THE WISE CADDIS-WORM 75 



may be, or decide to make an entirely new 

 costume. 



The case has always an opening at both 

 ends, in order to allow a constant stream of 

 water to flow through it ; for a Caddis does 

 not come up to the surface to breathe as so 



A CADDIS-WORM TAKING A WALK. 



many water insects do, but gets its supply of 

 oxygen from the water, by means of feathery 

 gills down its sides. 



The Caddis-worms live chiefly upon the 

 weeds growing beneath the water, but now 

 and again some of these funny insects grow 

 tired of having nothing but vegetable for 

 every meal, and vary their food by catching 

 and eating a few of the tiny water- dwellers. 



