HYMENOPTEEA (SAWFLIES). 



167 



the larvse to fall to the ground, where the soot and lime soon 

 destroys them. 



The Pear and Cherry Sawfly (Eriocampa limacina). 



Considerable annoyance is often caused by the larvse of this 

 species upon Cherry and Pear. The larvae (fig. 72) are called 



Fio. 72.— SuTG-woEM OF Peae (Briommpa Ivmadna). 



Slug-worms and Snegs, on account of their slimy slug-like ap- 

 pearance. They feed on the upper 

 surface of the leaves, eating only 

 the upper epidermis, and leaving 

 the lower intact (fig. 74). When 

 very numerous the leaves turn 

 brown, die, and fall off in the 

 summer, and a fresh lot of foliage 

 takes its place, thus weakening the 

 trees. "We have seen young trees 

 killed outright by them. The 

 adult Sawfly (fig. 73) is a small 

 glossy black insect, about one- 

 fourth of an inch in length; the 

 wings are iridescent, with the 

 middle area smoky black, and are 

 about three-quarters of an inch 



„ Fio. 73.— Pear Sawflt (Brwmmpa 

 from tip to tip. The parent fly Umacima), and cocoon. 



comes out of the ground beneath 



the trees in the spring, generally in April. In most cases a 



