PLATE III. 

 WATER BEETLES. 



i. Dyticus marginalis (Male). 



2. Dyticus marginalis (Female). 



3. Gyrinus natator (and under). 



4. Dyticus marginalis, larva. 



5. Gyrinus natator, larva. 



G. Gyrinus natator, Pupa case (on Arrow-head). 



Plants : — 



Arrow-head (^Sagittaria mgittifolid). Left Upper Corner, 

 Creeping Mouse-ear (^Myosotis rqyenfi). Right Upper Corner. 

 Bristle-stalk Club-rush {Scirpus setaceus) . Under Myosotis. 

 Water Feather-foil (Hottonia palustris). Under Arrow-head. 



