22 HYMENOPTERA. 



The Imported Currant-worm, Nematus vcntricosus 

 Klug. (5, II., 15). 



The Native Currant-worm, Pristiphora grossularicc 

 Walsh, (s, II., 20). 



Remedy. — Powdered White Hellebore dusted over 

 the infested bushes will destroy both species of cur- 

 rant-worms. 



UroceriD/E {Horntails). 



The members of this family are also injurious to 

 vegetation. The larvae are borers, living in the trunks 

 of trees. They undergo their transformations within 

 their burrows. The adult insects may be distinguished 

 from their allies, the Tenthredinidre, by the anterior 

 tibiae being furnished with a single apical spur, and the 

 abdomen of the female armed with a borer. The Saw- 

 flies have the anterior tibiae furnished with two apical 

 spurs, and the abdomen of the female armed with 

 saws. Note form and habits of Tremex Columba Linn, 

 (i, 228; 2, 53'^>). 



