—141 — 



Mesosternum short, transversely broadened, lozenye-slinped ; roitruni ex- 

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

 beneath ti. 3- Triglena, Ficber. 



Mesosternum broadly triany;ular, convex with a short and feeble apical 

 groove ; rostrum extending to first ventral segment ; anterior femora 



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



Meta>tei num not elevated. 



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



2 Mesothorax not semilunately hollowed out posteriorly 3- 



Mesothorax semilunately hollowed out posteriorly. 



Metasternum transversely elevated, the elevated part longitudinally impressed, 



slightly produced anteriorly, the same truncate or sinuate 



G. 6. Fidicina, A. et S. 



3 Pronotum a parallelogram "• 



Pronotum trap.^zoidal, 



Mesosternum flattened, sometimes slightly transversely 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 ol thorax distinct : last ventral segment in O not or only slightly 

 emarginate ni the middle G, 8. Tympanoterpes, Sttel. 



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, St;T;l. 



5 Tympanum present, 



Anteri-or femora with 2 large teeth and a minute one at the extremity ; rostram 

 extends only to the extremity ot the mesosternum ; q' 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 ; rf opercules semioval or broadly triangular 



G. II. Cicadatra, A.etS. 

 Tympanum wanting or rudimentary. 



Elytra with S apical cells G, 12, Melampsalta, 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 with 5 apical cells G. 15. Calyria, Stael. 



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, rj^ 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, rf oper- 

 cules small, not entirely covering the sonorous cavities 



G. 18. Cephaloxys, Signoret. 



