TENTHREDO ROSiE. 223 
devour. By tlie time that the caterpillar 
is ready to change to a chrysalis, the 
sickly fruit falls froui the stalk; the lit- 
tle animal then creeps into the ground, 
and after spinning for itself a case of 
coarse net-work, which it lines with a 
close, soft web, becomes a chrysalis, from 
which afterwards proceeds a saw fly. 
Lucy, What a quantity of mischief 
these little creatures must do ! You said, 
they were found upon rose trees ; do 
many of them eat our dear roses ? 
Mother, Several kinds, I believe. 
There is one, which makes seven or eight 
small wounds in a young shoot, and in 
each wound places a single ^^^ ; as the 
larvae increase in size the shoot becomes 
unhealthy, and the flower, deprived of its 
due nourishment, withers in the bud. 
Lucy. I frequently observe little rose 
buds, that look as if they had been dried 
up ; I suppose this is the work of those 
vile saw flies ? 
Mother, There is another species, 
the tenthredo rosce, whose ravages are 
