THE CANADIAN ENTOMOLOGIST. 103 
sometimes the branches of the spines assume a brownish tint, especially 
on the anterior segments. 
When full grown this larva measures a little over half an inch; it is 
nearly cylindrical, tapering slightly towards the hinder segments. 
The head is rather small, nearly globular, pale green with a faint 
yellowish tinge, and a dark brown dot on each side, and a few very fine 
_ short hairs visible only with a strong magnifier. The mandibles are 
tipped with brown. 
The body above is dark green, thickly set with green tubercles, from 
which proceed fleshy looking, forked, pale green, hair-like branches, 
most of them with their branches extending anteriorly and posteriorly 
On the anterior part of the second segment there is a row of four spines 
with five branches each, most of the others are forked, but some few of 
them have three branches each. ‘There are eight spines or tubercles on 
most of the segments, arranged more or less perfectly in a double trans- 
verse row. In some specimens the hair-like branches or appendages are 
black at the tips, and occasionally entirely black from the point of 
divergence. 
The under surface is similar to the upper; feet and prolegs green. 
When mature—from the middle to the latter end of June—these larvæ 
penetrate below the surface of the ground, where they construct little oval 
earthy cocoons, formed by glueing together particles cf earth with silky 
and glutinous matter. These cocoons are toughly made, and may be 
taken cut of the earth in which they are embedded and even handled 
roughly without much danger of dislodging the larvae. The specimens. 
which we have bred, when examined a week or two after the cocoons: 
were constructed, were still in the larval condition, although somewhat 
contracted in length. They all dried up and died before changing to 
pupae, so we are as yet unable to indicate when this change takes place, 
the appearance of the chrysalis or its duration. As we have not met 
with more than one brood in the season, it is probable that the larvae 
remain in the ground for some weeks unchanged, gradually transform to 
pupae and remain under ground in this condition until early the following 
spring. 
