174 
THE STUDY OF INSECTS. 
plants and will feed upon no others; thus, the Red-scale of 
the Orange does not trouble deciduous fruits. On the other 
hand, other species have a wide range of food plants. This 
is the case of the Greedy-scale, which infests a great variety 
of both cultivated and wild plants. 
Figure 202, page 165, represents the Scurfy Bark-louse, 
Chionaspis furfurus (Chi-o-nas'pis fur'fur-us), a species very 
widely distributed on apple, pear, and cherry; Figure 212, the 
Pine-leaf Scale, Chionaspis pinifolue (pin-i-fo'li-ae), which 
occurs on various species of pine and spruce in all parts of 
the United States where these trees grow; and Figure 213 
represents the red scale of California, Aspidiotus aurantii 
(As-pid-i-o'tus au*ran'ti-i), which is very destructive to 
oranges and lemons. 
Fig. 214 .—Nepa apiculata. See p. 131. 
