PLATE III. 



Fig. 1. Side view of Corixid clinging by his long middle legs to a 

 grass stem in the water. (This and the other pictures on this plate 

 were photographed from life.) 



Fig. 2. Corixid clinging to a vertical support in the water. 



Fig. 3. Corixids in water on horizontal support. 



Fig 4. Belostoma fluminea feeding upon dragon fly nymph. 



Fig 5. Characteristic position of Belostoma tiuminea upon a support 

 in the water, awaiting the approach of prey. 



(272) 



