HYMENOPTEKA. 403 



The larvae of these insects have a striking resemblance to the 

 caterpillars of Lepidoptera. They can only be distinguished from 

 them by a great globular head, not 

 hollowed out, and by their abdomi- 

 nal legs, in general to the number 

 of more than ten. They are called 

 false caterpillars (Fig. 379). Most of 

 them, when touched, erect themselves 

 and move about in a threatening 

 manner. They spin a silken cocoon FI ? . sso.-Lopiiyms P ini. 



before changing into pupae. The Lophyrm pini, which devours 

 the leaves of pine-trees, belongs to this- family. 



D D 2 



