ATTACKING THE LEAVES. 245 



The first brood of the perfect or winged insect appears from 

 the middle to the end of May, when the female deposits her 

 eggs on the under side of the leaves, generally placing them 

 singly, but sometimes in groups of two or three. The eggs 

 are nearly round, about one-twentieth of an inch long, a little 

 less in width, smooth, and of a pale yellowish -green color, 

 changing to reddish before hatching. 



The young caterpillar comes out of the egg in five or six 

 days, when it makes its first meal on a part of the empty egg- 



FIG. 253. 



shell, and then attacks the softer portions of the grape-vine 

 leaves. When first hatched, it is one-fifth of an inch long, 

 of a pale yellowish-green color, with a large head, and having 

 a long black horn near its posterior extremity, half as long 

 as its body. As it increases in size, the horn becomes rela- 

 tively shorter and changes in color ; the markings of the larva 

 also vary considerably at each moult. When full grown, it 

 presents the appearance shown in Fig. 253. It is then about 

 two inches long, with a rather small head of a pale-green 

 color dotted with yellow and with a pale-yellow stripe down 

 each side ; the body is green, of a slightly deeper shade than 

 the head, and covered with small yellow dots or granulations ; 



