66 OF THE LARVA STATE, 
cumstance, indeed, of the whole phenomenon, is the 
instinct with which the grubs are evidently guided to 
avoid devouring any vital part, so that they may not 
kill the caterpillar, as in that case it would be useless 
to them for food. When full grown, they even eat 
their way through the skin of the caterpillar without 
killing it, though it generally dies in a few days, 
without moving far from the place where the grubs 
have spun their group of silken cocoons in which to 
pass the winter.” * 
THE EGGS AND THE LARVA OF THE MICROGASTER 
GLOMORATUS. 
Fig, 3. the eggs, natural size ; Fig. 1. larva, natural size ; 
Fig. 2. the larva magnified. 
THE PUPA OF THE MICROGASTER GLOMORATUS. 
Fig. 1. size of life; Fig. 2. magnified. 
* Insect Transformations, p, 61. 
