HEMIPTERA. 



169 



Figure 208. The species figured here is sometimes very 

 injurious to maple-trees ; it also infests grape-vines and 

 other plants. 



FIG. 208. Pitlvinaria inmonerabilis. Female on grape, natural size. (From the 



Author's Report for 1880.) 



Lecanium (Le-ca'ni-um). The species of the genus Le- 

 canium abound everywhere ; they occur on all kinds of 



FIG. 209. Lecanium olecc ; la, insect enlarged. (From the Author's Report for 1880.) 



plants, both in conservatories and in the open air. Some of 

 them are known to gardeners as " soft-scales." But the 



