PLATE XX. Injury Caused by Hemiptera. 



i. Work of leaf hoppers on currant leaf. 



2. Potato leaf injured by Poecilocapsus lineatus Fabricius. 



3. Injury to pears by Lygus prat etuis Linnaeus. 



4. Podisus placidus Uhler feeding on currant worm, x 2. 



5. Apple leaves curled by the light red bug, Lygidea mendax 



Reuter. 



6. Froth mass of Aphrophora parallela Say. 



All others natural size. Photographs by B.- H. Walden. 



