HYMENOPTERA. 
403 
The larvze 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 

Fiz. 380.—Lophyrus pini. 
before changing into pups. The Lophyrus pini, which devours 
the leaves of pine-trees, belongs to this family. 
DD 2 

