ORCHARD LIFE. 



175 



common on both fruit and forest trees ; it is an ex- 

 ceedingly beautiful larva, being ornamented with 

 bright colors. The adult fe- 

 male is wingless, and lays her 

 eggs in a frothy mass on her 

 cocoon. The male (Fig. 145) 

 has well-developed wings. 



THE PLANT - LICE OR 

 APHIDS (Field and School 

 Work]. - The plant-lice or 

 aphids are minute insects 

 which live by sucking the sap from the more tender 

 portions of plants. They usually occur clustered 



FIG. 143. Male canker-worm. 



fcfe&Ct" 



"^^-^L^^-^^ 



FIG. 144. The white-marked tussock-moth, larva. 



together in large numbers, and may be either winged 

 or wingless (Fig. 146). Many kinds of aphids can be 

 found in any orchard ; among the more common 



FIG. 146. A group of aphids. 



