PLATE XVI. 



FIG. 



1. Metrioptera roeselii Hagenbach. (p. 166) Male imago. 



2. M. Itrachyptera Linnaeus, (p. 162) Male imago. 



3. M. albopunctata Goeze. (p. 158) Male imago. 



The three British species of the genus, all x 2. 



