Insect Enemies of Greenhouse and Ornamental Plants 1IJ 



A European Pine Saw-fly 

 Diprion simile Hartig 15 (Fig. 22, 23, 24, 25) 



This species which was first noted in the United States by 

 Dr. W. E. Britton, has recently been found injuring pines in several 

 nurseries in northern New Jersey. It is one of the most injurious 



Fig. 22. Larva of the European saw-fly 



Fig. 23. Male saw-fly, Diprion simile Hartig 



Fig. 24. Female saw-fly, Diprion simile Hartig 



Fig. 25. Cocoon 



Russia, France, Prussia, Sweden and England, and was evidently 

 saw-flies in Europe, damaging the pine forests of Southwestern 

 introduced into New Jersey on imported nursery stock. 



ISBritton, W. E., 1915. A Destructive Pine Saw-Fly Introduced from 

 Europe. In Jour. Econ. Ent., v. 8, p. 379 



