PLATE XXXI. 
Fic. 1. Ranatra linearis, Linn. 
2. Notonecta glauca, Linn. 
3. Plea minutissima, Fab. 
4. Corixa Geoffroyi, Leach 
5 »  eoneinna, Heb. 
6 » striata, Lenn. 
7. 4, Fallenn, Feb. 
8 5,  eavifrons, Thoms. 
9 »  coleoptrata, Fab. 
10. Sigara Scholtzu, Meb. 
