ADDITIONAL INSECT ENEMIES, 141 
from San Jose, California, where it was first discovered 
in this country, and its specific scientific name is fully 
deserved because it is 
one of the most per- 
nicious pests of fruit 
trees generally that 
has appeared in the 
present century. It 
was first seen in Cal- 
ifornia about 1870, 
and since that time 
became widely distrib- 
uted on nursery 
stock, also on fruits 
and on the bodies of ae 
larger insects, birds, Fig. 130. timp INFESTED WITH SCALE. 
and by various other means. It infests the bark, twigs, 
leaves and fruit of the quince 
and other trees. At first the 
young are inconspicuous, but 
they rapidly increase in size 
and numbers, till the bark is 
incrusted with scales, present- 
ing a grayish appearance as if 
the trees were coated with 
lime, or ashes. In spring the 
young appear crawling from 
under the scales, and through 
the summer there is a constant 
succession of generations. The 
young are active and spread 
rapidly, until each female be- 
Fig. 131. uNpERsipe or A Comes fixed and begins to se- 
YOUNG LARVA. crete 2 scale, and when full 
grown casts off her lezs and antenne, and there receives 
the visits of the male, an active two-winged insect. It 
