THE BUTTERFLY AND ITS ALLIES 



27 



destructive species, which infest apple trees and even forest 

 trees (Figs. 25 and 26). Eggs are laid in a ring-like cluster 

 around a twig (Fig. 27). Here they pass the winter and 

 hatch out in the spring as young larvae. The larvae are gre- 



FIG. 28. Nest of CUsiocampa disstria, the forest Tent-caterpillar, showing 

 the web and the way the larvse crowd together on it. Photo, by V. H. L. 



garious and spin a tent-like web, on which they live when 

 not feeding (Fig. 28). When ready to transform, they 

 spin a cocoon made of a yellow powder mixed with silk. 

 The Noctuidae 1 (Owlet moths) are night fliers and are 

 1 From nox, night. 



