238 



CADDIS-WORMS. 



and rapidly beneath the water, over to some other 

 plants. I there took the insect up, and found a large 

 bundle of eggs of a green colour, closely enveloped 

 in a strong, jelly-like substance, attached to the ex- 

 tremity of its abdomen. The bundle of eggs was of 

 an oblong form, bent in the middle, and the two ends 

 attached to the tail of the animal." 



The insects of this family are well known to you 

 in their larva state, under the name of case-worms, 

 or caddis-worms, and are to be found in every run- 



A, The Caddis-worm in cases of sand, shells, fyc. ; b, Grating of silk 

 formed by the larva previous to assuming the pupa state; c, The 

 Caddis-fly. 



ning stream, and almost in every ditch. Their 

 habitations are extremely singular, and differ con- 

 siderably, both in the materials employed, and in their 



