^Explanation of Plate I. 



l5eQCorI)inia o^taciatis Hagen 



FIG. 



1. Two nymphs on the bottom of the pond. 



2. The empty nymph skin, left cHnging to a branch after transformation, 



3. The female imago. 



4. 5. Dorsal and lateral views of the male imago. 



516 



