21 



same branch. It winters in the egg stage. The young hatch in May; 

 the niales issue in the summer. There is but one brood a year. It is 

 practically confined to the grape, but has been found on a few other 

 plants, and may spread to fruit trees. 



Fig. 10. — Aspidiotus rapax. Scales on twigs, and enlarged. (Howard.) 



THE PEACH SCALE. 



{Diaspis pentagona Targ. Tozz. — fig. 11.) 



The peach scale, sometimes known as the "whitewash scale," is of a 

 grayish white color, rather flat and irregularly circular or slightly 



PIG. 11.— Piaspis pentagona: a, infested branch; 6, female; c, male; d, group of males. (Howard.) 



ovate in outline, never as elongate as the scurfy bark-louse. The 

 exuvium is often a little way from the margin, and is yellowish or 



