270 



INSECTS INJURIOUS TO THE GRAPE. 



banded alternately with yellowish brown and white, the hind 

 ones ornamented with two pairs of diverging spines, having 

 at their base a garter-Hke tuft of long brown scales, from 

 which feature the moth derives its name. 



This insect is single-brooded ; it is common throughout On- 

 tario and Quebec. Where troublesome, it may be subdued by 

 hand-picking, or by pinching the clusters of leaves and crushing 



the larvae. 



No. 145. — The Grape-vine Cidaria. 



Cidaria diversilineata Hubn. 

 This is a pretty yellow moth, producing a geometric or 

 looping caterpillar which consumes the foliage of the vine. 

 The insect passes the winter in the caterpillar state, hiber- 

 nating in some secure retreat until aroused to activity by the 

 warmth of spring, when, after feeding a few days on the 

 young vine leaves, it becomes a chrysalis, producing the moth 

 about ten days afterwards. The moths within a few days 

 deposit their eggs on the leaves of the vine, which hatch early 

 in June, and the larvae nearly complete their growth by the 

 end of the month, pass into the chrysalis state, and appear as 

 moths again in July and August. These latter deposit eggs 

 for the second brood of larvae, which, before reaching maturity^ 

 become torpid, and remain in this condition until spring. 



The moth (Fig. 279) measures, when its wings are ex- 

 panded, about an inch and a half across. Its color is pale 

 ochre-yellow, crossed by many grayish-brown lines, and clouded 



with patches of the same, par- 

 ticularly along the margin of the 

 wings. The body and legs are 

 similar in color to the wings, the 

 latter being marked with black 

 about the joints. 



Early in June the reddish 

 geometric caterpillars of this moth are found upon the leaves^ 

 out of which they eat numerous pieces of various sizes and 

 shapes. By the middle of the month they become full 



Fig. 279. 



