INSECT ENEMIES OF THE GKAPE. 219 



three inches or more in length, and is then of a light 

 green color. The two warts on the second and third 

 rings are of a coral red color, the others yellow, beset 

 with black bristles. When the caterpillars leave the 

 plants uponwhich they have been feeding they do not 

 descend to the ground, like those of the sphinx inoths, 

 but retire to some secluded cane of the vine, or nearby 

 shrub, and there spin a cocoon, fastened longitudinally 

 to it, as shown in Fig. 89. When the leaves have fallen 

 from the plants in autumn these large cocoons become 

 quite conspicuous and may be readily gathered and 

 burned, or otherwise destroyed. 



BLUE CATEKPILLAES OF THE VINE. 



There are three or four different species of caterpil- 

 lars infesting grapevines known under this general 

 name, which have a close 

 resemblance to each 

 other, and are rather dif- 

 ficult to distinguish, ex- 

 cept by entomologists, 

 who have studied them 

 very carefully. The par- 

 ent moths, however, are FIG. oo. 

 very different ; but these, unfortunately, are seldom seen 

 by the practical vineyardist, whose interest in such mat- 

 ters is not usually awakened until he finds the caterpil- 

 lars stripping the leaves from his vines. The largest of 

 the blue caterpillars is the larvae of 



The Beautiful Wood Nymph (Eudryas grata 

 Fabr). This species is more or less common in all parts 

 of the country, and, although called "wood nymph," it 

 often attacks vines growing in city gardens. The moth 

 is of the size shown in Fig. 90 ; the color of the markings 

 on the fore wings are rusty brown and olive green ; the 

 hind wings nankeen yellow, broadly marked with pale 



