140 JUMPING PLANT-LICE. 
to a cicada. Its general color is crimson with broad black bands 
across the abdomen. The end of the abdomen of the female re- 
sembles a bird’s beak, that of the male ends in a large trough- 
shaped segment from which three narrow copulating organs pro- 
ject upwards. 
The insect, illustrated in Fig. 129, passes the winter as a 
winged being under loose bark of the infested tree. Early in 
spring the sexes mate and soon the females commence to deposit 
their peculiar eggs, which are elongated pear-shaped, smooth, 
shining light orange-yellow in color, and are attached to the bark 
of the tree with a short stalk, while a long and thread like pro- 
cess projects from the smaller end. As soon as hatched the 
strange-looking young nymph seeks the axils of the leaf petioles 
and later the stems of the growing fruit. 
Fic. 131—Adalia bipunctata Linn. After Div. of Entomology Dep. of Agriculture. 
In the state of New York this insect has at least four an- 
nual generations. Like the true plant-lice they secrete a large 
amount of honey-dew, at least in their younger stages. 
A number of other insects feed upon them. Some of them are 
shown in the following illustration. Fig. 130 represents the com- 
mon lace-winged fly, (Chrysopsa oculata) ; others closely related to 
it eat large numbers of the pear-tree psylla. The different kinds 
of lady bugs, but especially the one shown (Adalia bipunctata), 
(Fig. 131), also assist us materially not alone in keeping in 
check this jumping plant-louse, but all the other true plant-lice. 
The Psylla can be destroyed in the same way as the true 
plant-lice. The best methods to do so will be given later. 
A number of other species of Psylla are sometimes injuri- 
ous. 
