ENTOMOLOGY. 129 



referring to the classification of Bergman, I have 

 always concluded, as the fact has turned out in 

 breeding these insects in boxes, that a tenthredo, 

 and not a phalaena was the parent of our cater- 

 pillar. 



The Tenthredines are of the order Hymenop- 

 tera, which forms the fifth of the Linnean, and 

 the thirteenth of the modern, system ; and be- 

 long to the class Piezata of Fabricius, whose 

 arrangement, founded on the instrumenta cibaria 

 chiefly, is more useful when we are considering 

 the voracious perfect insects, than when attending 

 to those, which, as in the case before us, are 

 destructive in a larva state only. 



The characters of the Tenthredinidae of Dr. 

 Leach and Latreille are — Abdomen sessile, or 

 attached to the thorax in its whole length, ovi- 

 duct composed of two lamellae, which are serrated, 

 mandibles more or less long, terminated by two 

 strong teeth : wings with the marginal cells 

 complete ; labrum distinct : larva with membra- 

 naceous feet. 



Following Dr. Leach, the insect we are consi- 

 dering may then be thus described. 

 Order, — Hymenoptera. 

 Section, — ^Terebrantia. 



R 



