HYMENOPTERA : SAWFLIES. 



151 



bushes, producing woody galls. One of the largest 

 species is the Willow Gallfly ; its galls are found at 

 the end of basket willow twigs. 



Boring Sawflies. 



The Boring Sawflies have a long body ; the hind 

 body is blunt and ends in a horny point. Extending 

 from beneath the hind body is a long, saw-like, and 



Fig. 262. — Boiing Savvfly, or Pigeon Tremex. 



powerful borer, used to make holes in trees, in which to 

 lay their eggs. The larvae live in tree-trunks. 



True Sawflies. 



The females of the true 

 Sawflies have an ovipositor 

 composed of two saws, en- 

 closed between two horny 

 pieces, which serve as a 

 sheath. These saws are pro- 

 jected and withdrawn when 

 the insect is cutting a place 



Fig. 263. — Fir-tree Sawfl}'. 

 Enlarged. 



