PLATE XX. Injury Caused by Hemiptera. 



1. Work of leaf hoppers on currant leaf. 



2. Potato leaf injured by PoecUocapsus lineatus Fabricius. 



3. Injury to pears by Lygus pratensis Linnaeus. 



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



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



Renter. 



6. Froth niass of Aphrophora parallela Say. 



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



