PLATE XIX. 

 AQUATIC HETEROPTERA. 



1. Raniitra linearis. 



2. Notonecta glauca 



3. Nepa cinerea. 



Plants : — 



Duckweed (^Lemna). On surface of water. 

 Various-leaved Pondweed (Potamoffdon heteropht/Uua). 

 Starwort (Aster tripohum). 



