80 



NATURAL HISTORY OF INSECTS. 



Their caterpillars are provided with sixteen legs, but in 

 some these are very small, so that the larva appears to glide 

 over the surface like a slug; in others the last pair is imper- 



Fig. 209. 



feet. 



Some are naked, while others are clothed with hairs or 

 spines. Some live exposed upon the leaves; others live 

 beneath a web, or in a nest of leaves; a few construct cases in 

 which to dwell, while a still smaller number live within the 



Fig. 210. 



trunks of trees. The greater number spin cocoons in which 

 to undergo their transformations. The Cecropia Moth and 

 Caterpillar (Figs. 204 and 50); the Silk-worm and moth (Figs. 

 205 and 206); the Isabella Moth (Fig. 207), and the White 

 Miller (Fig. 208, are examples of this Family. 



