—141 — 



Mesosternum short, transversely broadened, lozenge-shaped ; roitruni ex- 

 tending to the middle of the mesosternum ; anterior femora with 3 teeth 

 beneath Ci. 3. Triglena, Fieber. 



Mesosternum broadly triangular, convex with a short and feeble apical 

 groove ; rostrum extending to first ventral segment ; anterior femora 



with 2 teeth beneath G. 4. Tettigia, Kollar. 



Metasternum not elevated. 



Head broad, short ; body hairy G. 5. Tettigades, A. et S. 



2 Mesothorax not semiluiiately hollowed out posteriorly 3. 



Mesothorax semihinately hollowed out posteriorly. 



Metasternum transversely elevated, the elevated part longitudinally impressed, 



slightly producetl anteriorly, the same truncate or siiuiate 



G. 6. Fidicina, A. et S. 



3 Pronotum a parallelogram 6. 



Pronotum trapi-zoidal, 



Mesosternum tlattened, sometimes slightly tran-^vorsely convex behind without a 



groove 4. 



Mesosternum convex with a groove. 



Costal and radial veins toward apex contiguous, apical appendage of wings 



moderate. Ocelli remote from base of head ; drums all uncovered 



G. 7. Tibicens, Latreille. 



4 Clypeus at apex truncate or subsinuately truncate 5. 



Clypeus at apex acuminate. 



Lateral margins of thoiax distinct ; last ventral segment in '^^ not or only slightly 

 emarginate in the middle G, 8. Tympanoterpes, Steel. 



Lateral margins of thorax not distinct. Transverse vein closing the second apical 

 cell not or scarcely oblique ; costal margin of wing before the middle nearly 



straight or very slightly rounded. Front somewhat prominent 



G, 9. Proarno, Sttel. 



5 Tympanum present. 



Anterior femora with 2 large teeth and a minute one at the extremity ; rostrum 

 extends only to the extremity of the mesosternum ; (^ opercules moderately 



large, hiding the mesosternum G, 10. Cicada, Linn. 



Anterior femora with 3 teeth beneath ; rostrum extends only to the middle of the 



mesosternum ; r^ opercules semioval or broadly triangular 



G. II. Cicadatra, A.etS. 

 Tympanum wanting or rudimentary. 



Elytia with 8 apical cells G. 12, Melatnpsalta, Kollar. 



Elytra with 6 apical cells. 



Ulnar veins separate at base G. 13. Platypedia, Uhler. 



Ulnar veins united at base G. 14. Carinata, A, et S. 



Elytra rt'ith 5 apical cells G. 15. Calyria, Strel. 



Elytra with 4 apical cells G. 16. Prunasis, Stael. 



6 Margins of pronotum joined to the sides in a prominent lobe. 



Anterior femora with 3 teeth beneath, r^ opercules abortive 



G. 17. Cicadetta, A. et S, 



7 Head small, forming a very acute angle, much narrower than the prothorax, the 



median lobe prolonged into a long point in front of the lateral lobes, (j oper- 

 cules small, not entirely covering the sonorous cavities 



G. 18. Cephaloxys, Signoret. 



