INSECTS. 



Caddis-Flies (PA^a*ea).-~The caddis-flies often 

 have antennae twice as long as the body. The eggs are 



FIG. 135. Life of the dragon-fly, about one half life-size. <7, grub living in 

 the water; m, mask or long lower lip with which it seizes its prey; , dragon- 

 fly creeping out of its last grub-skin ; c, perfect dragon-fly on the wing. 



carried about by the female, 



attached to her abdomen, and 



finally deposited upon some 



water-plant where they hatch, 



the larvae seeking the bottom, 



where they build coverings 



(Fig. 136) of wood, stone, 



shell, or sand. When about 



to change into a pupa they close the mouth of the case, 



finally biting their way out, and crawling to the surface a 



perfect insect. 



FIG. 136. Caddis-worm, with its 

 case, made of sticks. 



